CN1702539B - Illuminating device for photographing and camera - Google Patents

Abstract

An illuminating device for photographing includes: an illuminating unit having a plurality of current-controlled light emitting elements, which illuminates a subject with light emitted from the plurality of light emitting elements; a storage unit in which light emission brightness information is stored in correspondence to each of the plurality of light emitting elements; and a light emission control unit that controls light emission at the plurality of light emitting elements based upon the light emission brightness information stored in the storage unit so that the plurality of light emitting elements achieve uniform brightness levels at the subject.

Description

Lighting device that is used to take and camera

Included list of references

Here following being incorporated herein by reference in first to file:

The Japanese patent application No.2004-154999 that on May 25th, 2004 submitted to

The Japanese patent application No.2004-183594 that on June 22nd, 2004 submitted to

The Japanese patent application No.2004-183595 that on June 22nd, 2004 submitted to

Technical field

The present invention relates in the shooting operation process, throw light on by the lighting device of making body and camera.

Background technology

Known in correlation technique have a kind of camera, and its uses has the lighting device lighting of a plurality of LED mainly by making body (seeing Japanese patent disclosure No.2002-207236 co-pending).Japan patent disclosure No.2002-207236 co-pending has disclosed a kind of technology, and this technology is avoided owing to projecting by the shade of making body one side that the illumination light of launching from an independent position causes by the left side and the right side that a plurality of LED are configured in taking lens.

Also known a kind of technology in correlation technique, utilize this technology, in the shooting operation process, regulate the light angle (seeing Japanese patent disclosure No.2002-93207 co-pending) of the illumination light of being launched by the shooting lighting device of making body from illumination according to the visual angle of taking lens in the camera.Japan patent disclosure No.2002-93207 co-pending has disclosed a kind of technology, and this technology is by providing the light angle that can make it possible to change the illumination light that produces at the photocell place that is made of the xenon pipe with respect to the xenon pipe that catoptron moves as moving member.

Summary of the invention

The illumination light quantity that common illumination light quantity of launching from an independent LED provides less than discharge-type lighting devices such as xenon discharge tubes, for this reason, what the LED that use is placed with simple dispersed placement threw light on may be become inhomogeneous by the brightness of making body, promptly non-uniform illumination may take place.

Can eliminate by the making body shade and can increase whole illumination light quantity although described in Japan patent disclosure No.2002-207236 co-pending by dispose a plurality of LED to lighting device, the disclosure is not disclosed in the technology that realizes the uneven brightness of having a mind in the plane of delineation.

Wherein mechanically the method for mobile photocell also has a problem to be that the operation of regulating light angle becomes a very time-consuming procedure.

According to a first aspect of the invention, a kind of lighting device that is used to take comprises: a lighting unit, and it has a plurality of current-control type photocells, and lighting unit uses the optical illumination of launching from described a plurality of photocells by making body; A storage unit has wherein been stored the light emission monochrome information corresponding with each photocell in described a plurality of photocells; With a light emission controlling unit, it launches the light emission that monochrome information is controlled described a plurality of photocells place according to the light that is stored in the storage unit, makes described a plurality of photocell realize uniform luminance level on by making body.

According to a second aspect of the invention, at the lighting device that is used for taking aspect first, preferred: light emission monochrome information comprise be illustrated in the light emission brightness data that provides the light emission luminance level that realizes in described a plurality of photocells of scheduled current place and with corresponding electric current-light emission light characteristic data of at least one representative photocell in described a plurality of photocells; And the light emission controlling unit is regulated the current value that will offer each photocell according to following ratio, and this ratio provides the light of this photocell place realization of scheduled current and launches luminance level and launch the ratio of the corresponding light emission luminance level of the scheduled current shown in the light characteristic data indication with electric current-light.

According to a third aspect of the present invention, at the lighting device that is used for taking aspect first, preferred: light emission monochrome information comprise the light of indicating to make described a plurality of photocell can launch the predetermined luminance level need offer described a plurality of photocells electric current the electric current supply data and with corresponding electric current-light emission light characteristic data of at least one representative photocell in described a plurality of photocells; And the light emission controlling unit is regulated the current value that will offer each photocell according to following ratio, and this ratio is in order to realize that the predetermined brightness level will offer the electric current of this photocell and the ratio of the supply of current corresponding with the predetermined luminance level shown in electric current-light emission light characteristic data indication.

According to a fourth aspect of the present invention, at the lighting device that is used for taking aspect first, preferred: storage unit comprises a nonvolatile memory or a volatile memory, will give this volatile memory power supply in order to keep memory contents.

According to a fifth aspect of the present invention, a kind of lighting device that is used to take comprises: a lighting unit, it has a plurality of current-control type photocells, axis from the illuminating light flux of described a plurality of photocells differs from one another, and lighting unit uses the optical illumination of launching from described a plurality of photocells by making body; With a light emission controlling unit, it controls the light emission at described a plurality of photocells place, and the light emission controlling unit is according to the light emission of controlling described a plurality of photocells place with lower angle, and this angle is from the lighting optical axis of the illuminating light flux of each photocell with from the formed angle of lighting optical axis of the illuminating light flux of a reference light radiated element.

According to a sixth aspect of the invention, according to the lighting device that is used for taking aspect the 5th, preferred: first photocell that uses illumination center, visual angle in described a plurality of photocell is as the reference photocell; With following distance definition is the illumination distances of each photocell in described a plurality of photocell, this distance is the distance of measuring along from the lighting optical axis of the illuminating light flux of this photocell from this photocell to reference planes, and these reference planes are perpendicular to the lighting optical axis from the illuminating light flux of first photocell; And thereby the light emission controlling unit implements control and offers the current value of a photocell with respect to the current value increase that offers first photocell, and its increase degree surpasses the degree of the illumination distances of first photocell corresponding to the illumination distances of this photocell.

According to a seventh aspect of the present invention, according to the lighting device that is used for taking aspect the 5th, preferably: a storage unit further is provided, has wherein stored the light emission monochrome information corresponding with each photocell in described a plurality of photocells; And the light emission controlling unit is launched the light emission that monochrome information is controlled described a plurality of photocells place by the light that use is stored in the storage unit, make described a plurality of photocell on reference planes, realize uniform luminance level, the light emission controlling unit is also according to the light emission of controlling described a plurality of photocells place with lower angle, and this angle is from the lighting optical axis of the illuminating light flux of these photocells with from the formed angle of lighting optical axis of the illuminating light flux of reference light radiated element.

According to an eighth aspect of the present invention, according to the lighting device that is used for taking aspect the 5th, preferred: thus the light emission controlling unit changes do not throw light on zone outside the visual angle of the photocell number that will open in described a plurality of photocell according to the focal length of taking lens.

According to a ninth aspect of the present invention, a kind of lighting device that is used to take comprises: one first lighting unit, and it has a plurality of current-control type photocells, and lighting unit uses the optical illumination of launching from described a plurality of photocells by making body; A storage unit has wherein been stored the light emission monochrome information corresponding with each photocell in described a plurality of photocells; Second lighting unit of a discharge control type, it throws light on by making body; With a light emission controlling unit, it controls the light emission at the place of a plurality of photocells described in first lighting unit by the light emission monochrome information that use is stored in the storage unit, thus reduce since second lighting unit cause to by the degree of making body non-uniform illumination.

According to a tenth aspect of the present invention, according to the lighting device that is used for taking aspect the 9th, preferred: the light emission controlling unit is according to the light emission at a plurality of photocells place described in focus controlling first lighting unit of taking lens.

According to an eleventh aspect of the present invention, according to the lighting device that is used for taking aspect the 9th, preferably: further provide one to forbid the unit, an if condition below satisfying at least, forbid that the unit just forbids the light emission at the second lighting unit place, these conditions by the making body distance be equal to or less than f-number that predetermined value, sensitivity be equal to or greater than predetermined value, setting for predetermined value towards open sides; And when forbidding that the light emission at the second lighting unit place is forbidden in the unit, the light emission controlling unit is controlled the light emission at the place of a plurality of photocells described in first lighting unit by the light emission monochrome information that use is stored in the storage unit, thus make since first lighting unit cause to being minimized by the degree of making body non-uniform illumination.

According to a twelfth aspect of the present invention, a kind of camera comprises the lighting device that is used to take according to any one aspect in the first to the 11 aspect.

According to the 13 aspect of the present invention, a kind of lighting device that is used to take comprises: a lighting unit, it has a plurality of photocells, differ from one another from the axis of the illuminating light flux of described a plurality of photocells, lighting unit with the optical illumination of launching by making body; With a light emission controlling unit, it is carried out light at least to each photocell in described a plurality of photocells and launch/is not launched and be provided with and light is launched a kind of setting of luminance level in being provided with, thereby realizes specific illumination pattern.

According to the 14 aspect of the present invention, according to the lighting device that is used for taking aspect the 13, preferably further provide: a display unit, its shows light emission that each photocell in described a plurality of photocells is provided with/not emission state and light emission luminance level; An operating unit, its output expression light launch/are not launched the operation signal of setting and the operation signal that expression light emission luminance level is provided with; With an indicative control unit, it is according to the shown displaying contents in operation signal update displayed unit from operating unit output.

According to the 15 aspect of the present invention, according to the lighting device that is used for taking aspect the 14, preferred: the shown displaying contents of display unit is represented the pattern that throws light on.

According to the 16 aspect of the present invention, according to the lighting device that is used for taking aspect the 14, preferred: as a storage unit further to be provided, wherein to have stored multipacket message, a kind of illumination pattern in every group of multiple illumination pattern of information representation; And thereby the setting that the light emission controlling unit is carried out described a plurality of photocells realizes and one group of illumination pattern that the information of reading from storage unit is corresponding.

According to the 17 aspect of the present invention, according to the lighting device that is used for taking aspect the 14, preferred: further provide an illumination pattern to change the unit, the operation signal of its operation response unit output changes the illumination pattern.

According to the 18 aspect of the present invention, a kind of lighting device that is used to take comprises: a lighting unit, and it has a plurality of current-control type photocells, and lighting unit uses the optical illumination of launching from described a plurality of photocells by making body; With a lighting control unit, the signal of the light angle of the illumination light that its response expression lighting unit provides is implemented ON/OFF control to described a plurality of photocells.

According to nineteen of the present invention aspect, according to the lighting device that is used for taking aspect the 18, preferably: lighting control unit is by making be used in described a plurality of photocell the throwing light on photocell of neighboring area of coverage remain on closed condition and dwindle light angle, and enlarges light angle by opening the photocell that is in closed condition.

According to the 20 aspect of the present invention, according to the lighting device that is used for taking aspect the 18, preferably: with the middle section in the photocell illumination visual angle that is placed on the lighting unit middle section, and with throw light on neighboring area in the visual angle of the photocell that is placed on the lighting unit neighboring area; And lighting control unit makes it comprise that the photocell that is placed on the photocell in the lighting unit neighboring area and is placed in the middle section enlarges light angle by increasing the photocell number that will open gradually.

According to the 21 aspect of the present invention,, preferred: the signal that produces the expression light angle according to the visual angle according to the lighting device that is used for taking aspect the 18.

According to the 22 aspect of the present invention, at the lighting device that is used for taking aspect nineteen, preferably: at the lighting unit place, the density height that the density that the photocell of the neighboring area of illumination coverage is placed is placed according to the photocell of the middle section of bright coverage.

According to the 23 aspect of the present invention, at the lighting device that is used for taking aspect nineteen, preferred: the light emission brightness of lighting control unit photocell of the neighboring area of increase illumination coverage for the light emission brightness of the photocell of the middle section of illumination coverage.

According to the 24 aspect of the present invention, at the lighting device that is used for taking aspect nineteen, preferably: at the lighting unit place, the density height that the density that the photocell of the middle section of illumination coverage is placed is placed according to the photocell of the neighboring area of bright coverage.

According to the 25 aspect of the present invention, at the lighting device that is used for taking aspect nineteen, preferred: the light emission brightness of lighting control unit photocell of the middle section of increase illumination coverage for the light emission brightness of the photocell of the neighboring area of illumination coverage.

According to the 26 aspect of the present invention, at the lighting device that is used for taking aspect nineteen, preferably: at the lighting unit place, place photocell make they and with the neighboring area and the corresponding guide number coupling of middle section of coverage.

According to the 27 aspect of the present invention, according to the lighting device that is used for taking aspect the 18, preferred: each photocell all is made of White LED.

According to the 28 aspect of the present invention, a kind of camera comprises the lighting device that is used to take according to any one aspect in the 13 to the 27 aspect.

Description of drawings

Fig. 1 shows the Electrofax system that realizes in the first embodiment of the invention;

Fig. 2 is the structural drawing of the basic structure that Electrofax adopted among Fig. 1;

Fig. 3 shows led array;

Fig. 4 shows the example that optical transmission circuit can adopt structure;

Fig. 5 shows the illumination zone of each LED group;

Fig. 6 shows the example that optical transmission circuit among second embodiment can adopt structure;

Fig. 7 shows an example with Luminance Distribution in the shooting field angle of xenon pipe illumination;

Fig. 8 shows the relation between each moment, and these moment, light that are included in camera body place release shutter are constantly organized the moment that emits from the moment and light that the xenon pipe emits from LED;

Fig. 9 shows the camera arrangement that comprises the lighting device of realizing in the third embodiment of the invention;

Figure 10 is the structural drawing of the basic structure that adopts of lighting device;

Figure 11 shows from the observed led array of the light emission windows of lighting device;

Figure 12 shows the example that optical transmission circuit can adopt structure;

Figure 13 shows display device and is placed on the operating parts at lighting device place;

Figure 14 shows an a kind of example of demonstration of the pattern that throws light on;

Figure 15 shows an a kind of example of demonstration of the pattern that throws light on;

Figure 16 shows an example of the demonstration of a kind of pattern that throws light on that can adopt in the 4th embodiment;

Figure 17 shows the Electrofax system that realizes in the fifth embodiment of the invention;

Figure 18 is the structural drawing of the basic structure that the Electrofax system is adopted among Figure 17;

Figure 19 shows an example of a kind of structure that can adopt with LED and optical transmission circuit;

Figure 20 shows from by the observed light emission windows of making body side;

Figure 21 shows the illumination zone of each LED;

Figure 22 shows the state of light emission windows when reducing light angle;

Figure 23 shows the illumination zone when reducing light angle;

Figure 24 shows the state of light emission windows when further reducing light angle; With

Figure 25 shows the illumination zone that realizes with the LED that carries lens.

Embodiment

(first embodiment)

Explain the preferred embodiments of the present invention below with reference to accompanying drawing.Fig. 1 shows the Electrofax system that realizes in first embodiment of the invention.As shown in Figure 1, interchangeable taking lens 20 is installed on the Electrofax body 10.Lighting device (illuminating device) 30 is installed on the accessory slot (not shown) of Electrofax 10.

Fig. 2 is the structural drawing of the basic structure that adopted of the Electrofax system among Fig. 1.Lighting device 30 shown in Figure 2 comprises optical transmission circuit 31, and it makes LED (light emitting diode) launch light.The communication contact point (not shown) that lighting device 30 exists by the accessory slot place engages with the CPU101 at camera body 10 places communicates by letter, thereby receive the signal of timing signal and expression light emission brightness etc., wherein timing signal is provided as LED is begun and finish luminous instruction.

CPU101 in the camera body 10 is made of ASIC etc.The arithmetical operation that CPU puts rules into practice by the signal that uses each module that below will describe in detail to input to it, and exporting to each module according to the resultant control signal of arithmetical operation.In addition, CPU101 comprises and is used for engaging the interface circuit (not shown) of communicating by letter with lighting device 30.Should notice that when having selected the light emission to forbid being provided with at camera body 10 places CPU101 does not just give lighting device 30 output light emission instruction signals.

Be directed to image capturing component 121 places to what entered camera body 10 through taking lens 20 by the making body luminous flux through the shutter (not shown).Image capturing component 121 is made of ccd image sensor etc.Image capturing component 121 is caught by the image that is formed by the making body luminous flux and the image capturing signal and is exported to A/D change-over circuit 122.A/D change-over circuit 122 is converted to digital signal to the analog image lock-on signal.

The view data that CPU101 is converted to numeral is carried out Flame Image Process such as for example white balance processing, handle the Image Data Compression through Flame Image Process is become predetermined form thereby also carry out compression, thus and the view data compressed of decompression processing decompress(ion) etc.Recording medium 126 constitutes by can removably being loaded into storage card in the Electrofax body 10 etc.The Imagery Data Recording of process Flame Image Process is in recording medium 126.

Image regeneration circuit 124 is used for the reproduced picture data presented by using unpressed view data (view data that waits to compress or the view data of decompress(ion)) to produce.On the display device 125 that can constitute, by using reproduced picture video data display image by for example LCD.

Operating parts 107 comprises various operating switchs and to the CPU101 output setting operation signal corresponding with performed setting operation, an example of performed setting operation is the light emission that allows/forbid lighting device 30.

Distance measuring equipment 102 is surveyed with the focal position adjustment state of taking lens 20 acquisitions and detectable signal and is exported to CPU101.CPU101 makes it to drive amasthenic lens (not shown) in the taking lens 20 along the optical axis forward/backward for lens driving apparatus (not shown) output command, thereby regulates the focal position of taking lens 20.Should note detectable signal that distance measuring equipment 102 provided as expression corresponding to from mainly by the range information of the distance of making body (shooting distance).

Photometer device 103 detections are exported detectable signal through taking lens 20 by the making body light quantity and to CPU101.CPU101 calculates by making body brightness, then being used in the exposure calculating from the monochrome information that calculates according to this detectable signal.

The light firing order of lighting device 30 response CPU101 outputs is opened LED.How LED was arranged to array when Fig. 3 showed from the light emission windows observation of lighting device 30.For example lighting device can comprise 49 White LEDs altogether, and their along continuous straight runs are lined up 7 row LED, vertically lines up 7 row LED.Reference number 11A represents the LED of top line left end, and reference number 17A represents the LED of top line right-hand member.Reference number 21A represents that from the LED of top several second row left ends, reference number 27A represents the LED of the second row right-hand member.Similarly, reference number 71A represents the LED of bottom line left end, and reference number 77A represents the LED of bottom line right-hand member.The LED that is positioned at the center represents with reference number 44A.Can open and close this 49 LED independently of one another.

Fig. 4 shows the example that optical transmission circuit 31 in the lighting device 30 can adopt structure.The optical transmission circuit 31 of Fig. 4 comprises that illumination control circuit 2, current providing circuit 11 to 77, LED11A are to 77A, interface circuit 3 and nonvolatile memory 4.

Current providing circuit 11 to 77 constitutes by being used for 49 integrated circuit that LED drives etc., and the position that each current providing circuit is placed is corresponding to a LED among the 77A with 49 LED11A.Each current providing circuit in the current providing circuit 11 to 77 all provides battery 1 by line of electric force L10 and L11 cell voltage is elevated to and drives corresponding LED11A to the required assigned voltage level (as 3V) of 77A, and response illumination control circuit 2 order that transmission comes through signal wire L12 provides the electric current of prescribed level to LED.Current providing circuit 11 provides drive current to LED11A, and current providing circuit 12 provides drive current to LED12A.Similar with it, current providing circuit 77 provides drive current to LED77A.Illumination control circuit 2 determines to offer the current value of each LED.

Known LED is the device of Current Control in correlation technique, and drive current and light emission brightness (light emissive porwer) shows proportional relation in its rated range.Illumination control circuit 2 can be controlled the light quantity of launching from each LED separately by the drive current that control offers LED.

The command content that illumination control circuit 2 provides according to CPU101 determines to offer the current value of each LED, and indicates them to provide the electric current with definite current value to 77A to LED11A respectively in the moment of regulation for current providing circuit 11 to 77 output commands.Illumination control circuit has just been controlled each LED emission light/moment of closing and the light quantity of launching from each LED like this.

In this embodiment, be provided with between corresponding exposure period with shutter speed, each LED is luminous continuously under constant light emission luminance level.Because the light quantity of given LED emission is expressed as the product of light emission brightness and light length launch time, just can determine light emission brightness in case configure shutter speed.Launch luminance level to illumination control circuit 2 indications by the light that CPU101 determines as stated above.

The light of each LED emission luminance level and offer the relation data representation that obtains according to actual measured results between its electric current, these data are stored in the nonvolatile memory 4 with the form of form in advance.Illumination control circuit 2 is used up emission brightness and is tabled look-up as independent variable and determine the levels of current that need offer LED by making.Illumination control circuit is indicated the current value of determining like this to each current providing circuit 11 to 77 then.The order of current providing circuit 11 to 77 response illumination control circuits 2 outputs offers corresponding LED to electric current.Battery 1 is the power supply that comprises optical transmission circuit 31 uses of illumination control circuit 2 and current providing circuit 11 to 77.

The present invention has reduced the degree of irregularity of the illumination that lighting device 30 provides.In first embodiment, make because non-uniform illumination that the difference between the illumination light quantity that each LED11A launches to 77A causes and the difference between the illumination light quantity of middle section and neighboring area causes in the visual angle non-uniform illumination minimize.Should note controlling (flash of light control) by exposure calculating, thereby realize optimum exposure by total light emission brightness that lighting device 30 is realized.

(correction of difference between each LED)

As described below, data storage is in nonvolatile memory 4.In case lighting device 30 is installed on the brightness regulation instrument (not shown), the control circuit in the brightness regulation instrument and the illumination control circuit 2 at lighting device 30 places just are engaged with each other by interface circuit 3 and communicate by letter.Control circuit in the brightness regulation instrument is given illumination control circuit 2 output commands, illumination control circuit 2 by give successively each LED11A to 77A provide the electric current that current value is equal to each other (as rated current 70%) make each LED launch light successively.In response to the instruction of brightness regulation instrument, illumination control circuit 2 is given current providing circuit 11 to 77 output commands, thereby the electric current of realizing specified level is offered LED11A successively to 77A.So with having realized electric current that current value is equal to each other driving LED successively.

The optical receiving sensor (not shown) is connected on the brightness regulation instrument.Optical receiving sensor receives the data (photometric data) of representing light receiving signal intensity from the light and the brightness regulation instrument output of giving of each LED output successively.The control circuit at brightness regulation instrument place offers illumination control circuit 2 to photometric data, and sends to illumination control circuit 2 photometric data is stored into instruction in the nonvolatile memory 4.In response to the instruction from brightness regulation instrument place control circuit, 2 of illumination control circuits store in the nonvolatile memory 4 to the corresponding photometric data of respectively organizing of 77A with each LED11A.Be stored in the data representation light emission luminance level that each LED realizes when the electric current that current value is equal to each other being provided for each LED in the nonvolatile memory 4 like this.

Illumination control circuit 2 is created expression LED light emission luminance level and is offered the list data that concerns between the electric current of each LED by the photometric data that uses LED then, and the list data of creating is like this stored in the nonvolatile memory 4.Although under normal circumstances, the emission of drive current and light shows proportional relation between the brightness in each LED, the drive current that current value is equal to each other is provided for a plurality of LED after, it is variant that the light that these LED realize is launched luminance level.In this embodiment,, for having an independent scale-up factor between all LED drive currents and the light emission brightness independent one group drive current-light emission illuminometer of representing LED I-L characteristic (drive current-light emission light characteristic) is stored in the nonvolatile memory 4 by hypothesis.

Can be by LED11A be carried out data that actual measurement obtains or by using LED11A to create drive current-light emission illuminometer to the subsidiary test data of a LED among the 77A to a LED among the 77A.But should not create drive current-light emission illuminometer to the dissimilar LED data of 77A by using with LED11A.

When assembling lighting device product 30, corresponding with LED11A each LED in 77A photometric data and drive current-light respectively organized is launched illuminometer and is all stored in the nonvolatile memory 4.

Utilize above-mentioned list data and the photometric data that is stored in the nonvolatile memory 4, when determining to offer the current value of LED by reference table in the shooting operation process, the illumination control circuit 2 at lighting device 30 places is revised the difference between each LED as follows.For example, find out maximal value in the indicated value of 49 groups of photometric datas in being stored in non-volatile memories 4, and find out and the corresponding indicated value of photometric data of LED that to be ready determining its current value, calculate this maximal value and the latter's relative ratio, and the current value of reading in the form from nonvolatile memory 4 be multiply by the ratio that this calculates.For example, the value of supposing the photometric data corresponding with target LED indication is in all group photometric datas peaked 80%.In this case, the relative ratio that calculates is 1/0.8=1.25.Illumination control circuit 2 multiply by 1.25 to the current value of reading from form, thereby the current value that offers target LED is just big by 25% than the value in the list data.Like this, the electric current that the less relatively LED of photometric data indicated value (when provide the electric current time emission luminance level with the current value that is equal to each other lower LED to all LED) is provided has just increased, and has therefore just revised the difference of this specific LED.By this method, when LED11A when 77A opens, all LED just can launch the light that luminance level roughly is equal to each other.

(correction of difference between middle section and the neighboring area)

Fig. 5 shows the illumination zone of lighting device 30 place's different LED groups.Illuminated the left end zone the visual angle as shown in Figure 5, with from observed the illumination light that the corresponding LED group of the left column comprise LED41A sends by the making body side.In addition, the illumination light sent of the LED corresponding with the central array that comprises LED44A group has illuminated the middle section in the visual angle.With organize the illumination light of sending and illuminated the right-hand member zone the visual angle from observed the corresponding LED of the right-hand member row comprise LED47A by the making body side.

Comprising that illumination light that illumination light that the left number secondary series LED group of LED42A sends, illumination light that left several the 3rd row LED groups that comprise LED43A are sent, illumination light that right several the 3rd row LED groups that comprise LED45A are sent and the right number secondary series LED group that comprises LED46A are sent has been filled with left end row, central array and right-hand member is listed as the illumination zone that corresponding LED organizes.Therefore LED11A is to the particular range in the visual angle that thrown light on of each LED among the 77A.Although Fig. 5 shows the illumination zone along horizontal direction, same principle also is applicable to the illumination zone along vertical direction.

Fig. 5 is shown clearly in, even LED11A launches the light with same brightness level to 77A, inside circumference zone, visual angle also be lower than by making body brightness middle section in the visual angle by making body brightness.Represent shooting distance with D, with the distance D of following expression (1) expression ' from LED41A to visual angle limit point B along continuous straight runs.

D’＝D/cosθ...(1)

Wherein θ represents to be parallel to the angle that forms between the optical axis (along the straight line at illuminating light flux center) of the straight line of optical axis of taking lens 20 and LED41A.The illumination distances that shooting distance D realizes corresponding to LED44A.Distance D ' illumination distances that realizes corresponding to LED41A.

Therefore, can use the brightness at following expression (2) expression point B place and put poor Δ EV between the brightness at A place.

ΔEV＝ln(D′/D)/ln(

)...(2)

Provide a concrete example below, suppose that the taking lens 20 of focal length 35mm and silver halide 135mm film use together.In this case, from left to right Zhao Ming angular field of view is 60 °, so θ is 30 °.θ is equaled 30 ° of expression formula (1) and (2) above the substitution, and calculating Δ EV approximately is-0.415.That is to say the low 0.415EV of brightness at the brightness ratio point A place at some B place.

Therefore, for the luminance level that makes invocation point B and some A place equates, will make the radiative light emission of LED41A luminance level exceed a factor 2 than LED44A ^0.415By by this way LED11A being revised light emission brightness to each LED among the 77A, just regulated light emission brightness, thereby for the light of the LED44A that illuminates the center, visual angle emission brightness, increase the light emission luminance level that is used to throw light near the LED in the zone of visual angle limit point gradually.Like this, when LED11A when 77A opens, just with the whole shooting visual field of throwing light on of brightness uniformly roughly.

As mentioned above, LED11A has specific illumination zone to each LED among the 77A in the visual angle.That is to say, from LED11A to 77A in the lighting optical axis of illuminating light flux of all LED all differ from one another.With reference to the lighting optical axis of the illumination light of sending from LED44A, it is parallel to the optical axis extending of taking lens 20, all forms the angle that differ from one another to the corresponding lighting optical axis of 77A with respect to the lighting optical axis of the illumination light of LED44A with LED11A.

Distance limits according to shooting distance D and visual angle for the coverage of the position of shooting distance D.As shown in Figure 5, LED11A illuminates the coverage that limits according to shooting distance D and visual angle together to 77A.When coverage being limited on the reference planes 50, each LED11A equals the illumination distances that each LED realizes to the distance along the lighting optical axis of the illuminating light flux of LED between 77A and the reference planes 50.Should notice that reference planes 50 are perpendicular to the lighting optical axis of the illumination light of LED44A and the optical axis of taking lens 20.

As shown in Figure 5, the angle that forms from the lighting optical axis of lighting optical axis that illuminates from the center, visual angle illumination light far away and that send near the LED in the zone of visual angle limit point (periphery) and the illumination light of sending from LED44A is bigger, and the illumination distances of such LED is far away.So even LED11A sends the light with iso brightness level to 77A, far away and bigger owing to illumination distances near the zone of visual angle limit point from the center, visual angle, therefore illuminated brightness is just less.

As above-mentioned photometric data, for expression by the lighting optical axis corresponding with illuminate the data of the lighting optical axis institute angulation of the illumination light that the LED44A at center, visual angle sends with each LED, with these data organizations for and each LED11A to the form of 77A correspondence and be stored in the nonvolatile memory 4.These data can measure or obtain and store in the nonvolatile memory 4 according to design load by prior.Should note, replace the angle-data of those expressions by lighting optical axis institute angulation, also can be in nonvolatile memory 4 the data storage of expression ratio, this ratio is meant the ratio of illumination distances with the illumination distances of other LED realization of the LED44A realization of illuminating the center, visual angle.

Illumination control circuit 2 is according to controlling the light emission of each LED by carrying out above-mentioned data that the arithmetical operation shown in the aforementioned expression formula obtains.That is to say that illumination control circuit 2 is implemented control, thereby the electric current with big current value is provided for the LED that for the illumination distances of the LED44A realization of illuminating the center, visual angle, has big illumination distances.In other words, the ratio of the illumination distances of illumination distances that realizes according to LED44A and given LED determines to offer the current value of this LED.The current value that will offer each LED is regulated in this zone of promptly illuminating according to LED of also anticipating.

After the difference of at first having revised between each LED, carry out above-mentioned to the visual angle in the brightness correction of middle section and neighboring area.

The information of expression taking lens 20 focal lengths is input among the CPU101, and this information is the part of shot information signal of communication (not shown), and the shot information signal of communication also comprises aforesaid focal position information.Because this shot information signal of communication passes to lighting device 30 from CPU101 then in the structure that this embodiment realizes, so the illumination control circuit 2 at lighting device 30 places can access the focus information of expression taking lens 20 focal lengths.The focal length that illumination control circuit 2 is indicated according to up-to-date focus information is carried out the correction to brightness in middle section in the visual angle and the neighboring area.

Sum up first above-mentioned embodiment below.

(1) 49 LED11A that constitute lighting device 30 place's photocells are used for illuminating different range in the visual angle to 77A.

(2) expression is when to the data of the LED11A light that each LED realizes when 77A provides equivalent electric current emission luminance level with represent that the list data of the I-L characteristic (drive current-light is launched light characteristic) of LED stores in the nonvolatile memory 4.For having an independent scale-up factor between all LED drive currents and the light emission brightness, only store independent one group of list data of representing drive current-light emission light characteristic by hypothesis.Like this, owing to do not need to prepare corresponding driving electric current-light emission illuminometer to each LED, just can reduce required time span of DATA REASONING and nonvolatile memory 4 does not need to have very big memory capacity.

(3) when determining that opening lighting device 30 will offer the current value of each LED, be calculated as follows relative ratio, promptly be stored in maximal value in the represented value of 49 groups of photometric datas in the nonvolatile memory 4 and ratio, and the current value of reading in the form from nonvolatile memory 4 be multiply by the ratio that this calculates corresponding to the represented value of the photometric data of the LED that to be ready determining its current value.Like this, to those lower LED of emission luminance brightness when equivalent electric current being provided for all LED, promptly light emission luminance level lower (lower light emission efficiency) thus LED difference between the light emission luminance level that bigger electric current revises each LED is provided.By this correction, when LED11A when 77A opens, because all LED launch and have the roughly light of uniform luminance level, so just can illuminate by making body equably.

(4) owing to revised following difference, promptly illuminate the caused luminance difference of difference between the illumination distances D ' of the LED that illumination distances D that the LED44A at center, visual angle realizes and other each its shooting visual field of being illuminated be different from LED44A, so just regulated light emission brightness, thereby it is for the light of the LED44A that illuminates the center, visual angle is launched brightness, bigger than the light emission brightness increase degree of the LED of the scope of close visual angle limit point to illumination.So, when LED11A when 77A opens, the whole zone in the visual angle of just throwing light on equably, thus realize roughly uniform brightness.

Although in nonvolatile memory 4, stored independent one group of LED drive current-light emission illuminometer data, also can store 49 groups of data, every group of data are corresponding with a LED.

The LED11A that constitutes lighting device 30 can use for example 30 LED or 70 LED to 77A number not necessarily 49.

The LED11A that constitutes lighting device 30 can be arranged to circular array, oval-shaped array or rectangular array to 77A, and does not adopt the quadrate array in the foregoing description.

Can launch the illuminometer data storage to photometric data and drive current-light in common RAM rather than nonvolatile memory 4.Should use reserve battery to keep being stored in data content among the RAM.

Lighting device 30 can comprise an optical receiving sensor of realizing the brightness regulation instrumental function.In this case, just can and need not to use brightness regulation instrument separately in the light emission brightness (can carry out self check) of lighting device 30 self each LED of internal measurement.

If lighting device 30 can be carried out self check, photometric data and drive current-light emission illuminometer data just can be stored in the storer (RAM) that can not keep to be stored in data content wherein so.Just should carry out self check at every turn when in this case, starting lighting device 30 and should launch the illuminometer data storage to the photometric data that obtains by self check and drive current-light in storer.

In order to make LED11A to the particular range different in the visual angle that can throw light on of each LED among the 77A with the illumination zone of other LED, the orientation that should regulate each LED perhaps should change the direction of the luminous flux of launching at LED11A to change the direction of the luminous flux of launching from LED as opticses such as lens or prisms to the exiting side placement of 77A.For most convenient in actual use, the visual angle can be set make it along continuous straight runs and cover 120 ° of scopes and vertically cover 110 ° of scopes.

In above-mentioned explanation, be placed on the visual angle limit point B that LED11A LED41A of left end in the 77A illuminates left end.If the focal length of taking lens 20 is longer, it is smaller than foregoing example that the visual angle just becomes, and the illumination light of sending from LED41A (and illumination light of sending from LED47A) will advance to and cross angular field of view.In this case, the LED of scope does not just need to have opened outside those illumination visual angles.By the LED number of opening according to focus adjustment, just do not open the LED that those will launch scope outside the unnecessary illumination light illumination visual angle, therefore just reduced the consumption of electric current.

In above-mentioned explanation, the data storage of the expression light that each LED realizes when equivalent electric current is provided emission luminance level is in nonvolatile memory 4.The current value that instead, can also storage representation will offer each LED for the light of launching the uniform luminance level from each LED.

(second embodiment)

Be used for processing that the luminance difference of middle section and neighboring area in the aforementioned visual angle is revised by execution, can revise the non-uniform illumination that causes as discharge-type lighting devices such as xenon (Xe) discharge tubes.Fig. 6 shows the example that optical transmission circuit in the lighting device 30 that second embodiment realize can adopt structure.Optical transmission circuit among Fig. 6 comprises DC/DC converter 201, voltage detection circuit 202, main capacitor 203, light countdown circuit 204, current providing circuit 205, flash of light control/stepup transformer/intednsity circuit 206, interface circuit 207, xenon pipe 209 and one group of LED210.

DC/DC converter 201 raises the voltage that battery 1 provides (as to 300V) and gives main capacitor 203 chargings.Voltage detection circuit 202 is surveyed the charge potential at main capacitor 203 places and is given flash of light control/stepup transformer/intednsity circuit 206 output detectable signals.The light countdown circuit 204 response flash of light light firing order that control/stepup transformer/intednsity circuit 206 is exported that comprises the trigger circuit (not shown) applies trigger voltage to the trigger electrode at xenon pipe 209 places.Like this, the electric energy that has been stored in the main capacitor 203 just discharges in xenon pipe 209, makes xenon pipe 209 launch flash of light.

Current providing circuit 205 is similar to the current providing circuit 11 to 77 of Fig. 4.LED in the LED group 210 is similar to LED11A among Fig. 4 to 77A.The light emission at 210 places is launched and is organized at LED in flash of light control/stepup transformer/intednsity circuit 206 controls to the charging of main capacitor 203, at the light at xenon pipe 209 places.

Fig. 7 shows an example with the Luminance Distribution in the visual angle of xenon pipe 209 illuminations.Luminance level is the highest at the regional A place at plane of delineation center, and along with the increase of leaving plane of delineation centre distance, brightness is step-down gradually.In other words, brightness reduces in the following order: zone (A)＞zone (B)＞zone (C)＞zone (D)＞zone (E).In this embodiment, except using xenon pipe 209 emission light, also use LED group 210 emission light (using xenon pipe and LED to launch light together), make it more access areas A and the interior brightness of B with regard to the luminance level in raise region D and the E like this, thereby reduced the degree of non-uniform illumination.For example, if the difference between the mean flow rate in mean flow rate in regional A and the B and region D and the E has surpassed predetermined value, open main field of illumination D of control and E thereby so just LED group 210 is carried out.When the light angle of xenon pipe 209 was set in broad side (with the shooting visual field of illumination wide-angle lens), the difference of brightness just tended to surpass predetermined value.

Fig. 8 shows the relation between the following moment, promptly constitute the fast curtain in front of the door of shutter (not shown) of camera body 10 and the moment that fast curtain is behind the door opened respectively, the moment that shutter curtain is closed respectively, with the 209 radiative moment of xenon pipe and light from LED 210 moment that emit of group.When carrying out shutter release operation on camera body 10, CPU101 makes the shooting order mechanism (not shown) of camera body 10 begin shooting operation.In response to shooting operation, fast curtain is in front of the door advanced along opening direction at the time point t0 of Fig. 8, and soon in front of the door curtain open the aperture (not shown) at time point t1.

When shutter speed is equal to or less than synchronous speed, elapsed time length (wide-open time) is greater than the time span (being set at 1/1000 second magnitude) with the 209 emission flashes of light of xenon pipe between time point t1 and the time point t3, wherein aperture is opened at time point t1, begun time point t2 operation soon behind the door curtain begin to close aperture at time point t3.CPU101 transmits signal (so-called X contact signal) for the flash of light control/stepup transformer/intednsity circuit 206 of lighting device 30, this signal constitutes to the light of xenon pipe 209 emission sign on, thereby promptly xenon pipe 209 finished flash light emission beginning to launch light behind the time point t1 before time point t3.

When receiving light emission sign on signal, flash of light control/stepup transformer/intednsity circuit 206 makes 209 emissions of xenon pipe glisten to light countdown circuit 204 output commands, returns current providing circuit 205 output commands and makes LED group 210 launch light in the length at the appointed time.The light that each LED place of storage representation formation LED group 210 realizes in the nonvolatile memory (not shown) is launched the data (promptly offering the current value of LED) of luminance level in advance.

LED group 210 can be luminous continuously time cycle grow than xenon pipe 209.Therefore, even the light emission brightness of the light emission brightness ratio xenon pipe 209 of LED group 210 is low, by making the fluorescent lifetime cycle of LED group 210 launch the time span of glistening, just can increase the time integral value that is illustrated in luminance level on the neighboring area, visual angle greater than xenon pipe 209.But the luminous time span of LED group should not remain on the time span of full-gear greater than shutter.

For revising the non-uniform illumination that xenon pipe 209 causes, obtain following data according to actual measurement, the data that concern between the luminous time span (promptly needing to provide the time span of electric current) of light emission brightness (being the current value that is provided) that each LED need realize and needs promptly are provided, these data are stored in the nonvolatile memory (not shown) with the form of form.Launch brightness with reference to this form by the light that uses xenon pipe 209, flash of light control/stepup transformer/intednsity circuit 206 current value that need provide for the degree that reduces non-uniform illumination is provided and the time span of electric current need be provided, and sends the instruction of opening each LED for current providing circuit 205.

As shown in Figure 8, through schedule time during length, shooting order mechanism makes that soon curtain begins to advance along the aperture closing direction at time point t2 behind the door after curtain is opened aperture (at time point t1) in front of the door soon.Set preset time length according to shutter speed.

At time point t4, curtain is closed aperture behind the door soon.Therefore, in the time (during the standard-sized sheet) that aperture stays open between time point t1 and time point t3,209 emission flashes of light of xenon pipe and LED group 210 are launched light in the length at the fixed time, thereby illuminate main by making body.

The multi-group data corresponding with the focal length of the variation of taking lens 20 is stored in the nonvolatile memory, is used to make the degree of non-uniform illumination to minimize.When using the wide-angle lens of less focal length, the Luminance Distribution in the visual angle between middle section and the neighboring area is tended to very inconsistent.Otherwise when focal length was big, the luminance level of the luminance level of middle section and neighboring area had only less difference in the visual angle.So, many groups data corresponding with particular focal length are stored in hope in the nonvolatile memory (not shown), thereby are adjusted in the next degree that reduces non-uniform illumination at any given focal length best of luminous pattern that LED organizes 210 places accordingly by the focal length with the taking lens 20 that uses.

In second above-mentioned embodiment, lighting device comprises and all is used for photoemissive xenon pipe 209 and LED group 210, by using the LED group 210 illumination light corrections that provide because the uneven brightness that the illumination light that xenon pipe 209 is provided causes, regulating light emission brightness makes: for the light that LED44A the realized emission brightness at the center, visual angle that is used for throwing light on, illumination realizes the light emission brightness of higher level near the LED in the zone of visual angle limit point.Like this even guaranteed in whole visual angle to realize roughly brightness uniformly.This embodiment is effective especially for the xenon pipe 209 that employing has the variable illumination angle, this is because when being set in the wide-angle side with the corresponding light angle xenon pipe 209 of focal length of taking lens 20, tends to take place easily very big difference between the luminance level of middle section and the luminance level of neighboring area.

If note existing following at least one condition, flash of light control/stepup transformer/intednsity circuit 206 should be forbidden the emission of xenon pipe 209 light and should organize 210 luminous with LED: to mainly being equal to or less than predetermined value by the shooting distance of making body (being represented by the range information that distance measuring equipment 102 provides); Sensitivity (comprising image capturing sensitivity and iso sensitivity) is set in the level higher than predetermined sensitivity level; With f-number set with respect to predetermined value more towards opening side.Owing to only need launch a spot of light under these conditions, so if also just tend to take place easily overexposure with xenon pipe 209 is luminous.Therefore in order to prevent that this overexposure from just should organize 210 luminous with LED.

Notice that term " light emission component " can be used to refer to independent LED.Light emission component can be made up of an independent LED as this embodiment, perhaps can be made up of a plurality of adjustings be used for throwing light on LED of an independent illumination zone.

(the 3rd embodiment)

Fig. 9 shows the camera arrangement that comprises according to the lighting device of realizing in the third embodiment of the invention.As shown in Figure 9, lighting device 320 is installed on the accessory slot (not shown) of camera 310.

Figure 10 is the structural drawing of the basic structure that adopted of lighting device 320.Lighting device 320 comprises that CPU401, display message produce circuit 402, display device 403, nonvolatile memory 404, operating parts 405 and make the radiative optical transmission circuit 321 of LED (light emitting diode).

CPU401 is made of ASIC etc.The arithmetical operation that CPU401 puts rules into practice by the signal that uses each module to input to it, and exporting to each module according to the resultant control signal of arithmetical operation.In addition, CPU401 comprises an interface circuit (not shown) that the CPU joint is communicated by letter that is used for the pusher side of taking a picture.Pass over the signal etc. that indication LED begins and finish photoemissive timing signal, pilot light emission brightness from camera cpu.

The order that display message generation circuit 402 response CPU401 send produces the information that will show on display device 403.Display message comprises the illumination pattern configuration information of the illumination pattern that the usefulness lighting device 320 of for example indicating is realized.The back will be described the illumination pattern in detail.On the display device 403 that constitutes by LCD panel etc., show by display message and produce the display message that circuit 402 produces.

Even the structure that nonvolatile memory 404 adopts makes when turning off the power switch (not shown) of lighting device 320 it also can keep the content of storing.The data that concern between the electric current of in nonvolatile memory 404, having stored expression LED light emission brightness and being provided, the data that expression is provided with when the front lit pattern etc.

Operating parts 405 comprises below operating switch such as the four-way switch that will describe and to corresponding operation signals such as CPU401 output and for example setting operations, the execution setting operation is in order to set the specific illumination pattern at lighting device 320 places.

CPU401 opens the LED at optical transmission circuit 321 places when the light firing order that receives from camera cpu.Figure 11 shows from the layout of the observed LED of light emission windows of lighting device 320.It is for example can one total that (the individual White LED of m * n), they be arranged to the capable n row of m altogether.Reference number 11A represents the LED of top line left end, and reference number 1nA represents the LED of top line right-hand member.Reference number 21A represents from the LED of top several second row left ends, and reference number 2nA represents the LED of the second row right-hand member.Similarly, reference number m1A represents the LED of bottom line left end, and reference number mnA represents the LED of bottom line right-hand member.Can regulate (the luminance level of the individual LED of m * n) and can open and close these LED respectively independently of one another.

Figure 12 shows the example that optical transmission circuit 321 can adopt structure.Optical transmission circuit 321 among Figure 12 comprises that illumination control circuit 411, current providing circuit 11 to mn and LED11A are to mnA.

Each current providing circuit in the current providing circuit 11 to nm all constitutes by being used for integrated circuit that LED drives etc., and the position that each current providing circuit is placed is with (m * n) individual LED11A is corresponding to a LED among the mnA.Each current providing circuit in the current providing circuit 11 to mn all the cell voltage that is provided by the battery (not shown) is provided and drives corresponding LED11A to the required assigned voltage level (as 3V) of mnA, and response is transmitted the order that comes provides prescribed level to LED electric current from illumination control circuit 411.Current providing circuit 11 provides drive current to LED11A, and current providing circuit 12 provides drive current to LED12A.Similar with it, current providing circuit mn provide drive current to LEDmnA.CPU401 determines to offer the current value (see figure 10) of each LED.

Known LED is the device of Current Control in correlation technique, and drive current and light emission brightness (light emissive porwer) shows proportional relation in its rated range.Illumination control circuit 411 can be controlled the light quantity of launching from each LED separately by the drive current that control offers LED.

The instruction that illumination control circuit 411 provides according to CPU401 determines to offer the current value of each LED, and give the indication of current providing circuit 11 to nm output commands they the moment of stipulating respectively to LED11A to mnA provide have the electric current of definite current value.Illumination control circuit has just been controlled each LED emission light/moment of closing and the light quantity of launching from each LED like this.

In this embodiment, be provided with between corresponding exposure period with shutter speed, each LED is luminous continuously under constant light emission luminance level.Because the light quantity of given LED emission is expressed as the product of light emission brightness and light length launch time, just can determine light emission brightness in case configure shutter speed.When obtaining from camera cpu representing that the light of determining according to shutter speed is launched the light emission monochrome information of brightness, CPU401 determines need offer the current value of each LED and the current value of determining is like this indicated to illumination control circuit 411.

The light of each LED emission luminance level and offer the relation data representation that obtains according to actual measured results between its electric current, these data are stored in the nonvolatile memory 404 with the form of form in advance.CPU401 uses up emission brightness and tables look-up as independent variable and the levels of current that need provide is provided by making.Illumination control circuit is given each current providing circuit 11 to mn the current value of determining like this by illumination control circuit 411 indications then.The order of current providing circuit 11 to mn response illumination control circuits 411 outputs offers corresponding LED to electric current.

(being used for revising the data of difference between each LED)

(being used for revising the data of difference between middle section and the neighboring area)

The data storage that is used for revising the data of difference between each LED and is used for revising difference between middle section and the neighboring area is in nonvolatile memory 404.For example can when lighting device 320 being installed on the brightness regulation instrument (not shown), store these data.For being used for revising the data of difference between each LED and being used for revising the data of difference between middle section and the neighboring area, their obtain manner, be stored in mode in the storer and the use-pattern in correcting process all with similar to the explanation that first embodiment did.Therefore, suppose the explanation of first embodiment enough here, do not carry out repetition of explanation.But the difference of the 3rd embodiment and first embodiment is that LED is arranged in the capable n row of m among the 3rd embodiment.

In the 3rd embodiment, utilize above-mentioned lighting device 320 to realize the non-uniform illumination of having a mind to as luminous point illumination etc.In the 3rd embodiment, use LED11A to throw light on by making body selectively to mnA.The whole light that attention realizes with lighting device 320 by exposure calculating control is launched brightness (brilliance control) thereby is realized optimum exposure.

Figure 13 shows display device 403 and is placed on the operating parts 405 of lighting device 320 back.At display device 403 places, can show m (OK) * individual square that limits by mesh lines of n (row), each square is with (LED among the individual LED of m * n) is corresponding.

Four-way switch SW2 is provided with switch SW 1, determines switch SW 6, adds switch SW 7 and deletes switch SW 8 to SW5, pattern and constituted operating parts 405.

When the operator presses pattern switch SW 1 is set, CPU401 make display device 403 beginnings be stored in nonvolatile memory 404 in advance in the corresponding demonstration of illumination pattern data.

Figure 14 has provided an example that shows, it represents a kind of circular light spot illumination pattern.Corresponding with each grid square, represent luminous LED with white circular, represent non-luminous LED with dark circles.When each operation pattern is provided with switch SW 1, CPU401 reads the data of the different illumination of expression pattern from nonvolatile memory 404, and press the switch handle illumination pattern corresponding by circulation and show, as being shown as the triangle luminous point illumination pattern shown in Figure 15, star luminous point illumination pattern (not shown), heart-shaped luminous point illumination pattern (not shown) etc. with the data of having read.The illumination pattern that can read from nonvolatile memory comprises the illumination pattern by opening illumination pattern that all LED realize and can freely being customized by the operator.

When the operator presses when determining switch SW 6, CPU401 is registered as light to the current illumination pattern setting that is presented at the illumination pattern on the display device 403 and launches selected illumination pattern.In this state, when receiving the light firing order from camera cpu, CPU401 only opens those LED with the illumination pattern indication of registration.

The illumination pattern of explained later operator's customization.When the repeatable operation pattern was provided with switch SW 1, CPU401 made display device 403 place's displaying format customizations that screen is set.Customization is provided with shields on the display device 403 that is presented among Figure 13.The initial position of cursor " a " is in the upper left corner of display device 403 display screens.Can encase the foursquare thick line of grid by for example flicker and represent cursor.Cursor moves when the operator presses four-way switch SW2 to SW5.If press switch SW 4 to the right, CPU401 moves right cursor next square from cursor position current on the display.If press downward switch SW 3, CPU401 moves to next square below the cursor position current on the display to cursor.

When the operator presses when determining switch SW 6, as the affirmation to this operation, CPU401 shows cursor and is transformed into steady state (SS) from blink states.If after affirmation, press four-way switch SW2 any one switch in the SW5, just produce a new blinking cursor, and make that this cursor begins from confirmed position to move in the direction corresponding with the four-way switch indicated direction of being pressed.Attention confirms that at each the position keeps steady display.Do not produce new cursor (if promptly double pressing determined switch SW 6) if press definite switch SW 6, CPU401 is shown as white square to square in the affirmation position that is in steady state (SS) so, and unidentified square is shown as black squares.In addition, CPU401 is registered as light to the illumination pattern setting with the illumination pattern of representing through the square position of confirming and launches selected illumination pattern.

Like this, the illumination pattern of operator's customization just is presented on the display device 403, and its display mode is similar with the illumination pattern that shows Figure 14 and 15.In this state, when receiving the light firing order of camera cpu, CPU401 only opens those LED that indicates in customization illumination pattern.When having registered the illumination pattern when being provided with, the data storage of the illumination pattern of expression operator customization in nonvolatile memory 404.

As described below, can change the illumination pattern of registration.Shown in Figure 14 or 15, when the illumination pattern was presented on the display device 403, the operator pressed and adds switch SW 7, and in response, CPU401 shows blinking cursor " a " in the initial position of display device 403 display screens.Cursor moves when the operator operates four-way switch SW2 to SW5.

When the operator presses when determining switch SW 6, CPU401 removes the foursquare affirmation to Set For Current blinking cursor place.In addition, thus CPU401 conversion display mode the square of removing shown from white change black display into.By this method, can cancel in the illumination pattern from the emission of the light of any one LED.

Shown in Figure 14 or 15, when the illumination pattern was presented on the display device 403, the operator pressed deletion switch SW 8, and in response, CPU shows blinking cursor " a " in the initial position of the display screen of display device 403.Cursor moves when the operator operates four-way switch SW2 to SW5.

When the operator presses when determining switch SW 6, CPU401 confirms the square at Set For Current blinking cursor place.The CPU401 conversion makes it to change white into from black display and shows the foursquare display mode of confirm then.So just can be added to the LED that wants in the illumination pattern.With representing by the operator by cancellation from the emission of the light of specific LED or add information that the photoemissive LED of more participations makes change and upgrade data in the nonvolatile memory 404.

Sum up above-mentioned the 3rd embodiment below.

(1) constitute lighting device 320 place's photocells (the individual LED11A of m * n) is to throw light on different range in the visual angle of mnA.

(2) expression is when to the data of the LED11A light that each LED realizes when mnA provides equivalent electric current emission luminance level with represent that the list data of the I-L characteristic (drive current-light is launched light characteristic) of LED stores in the nonvolatile memory 404.For having an independent scale-up factor between all LED drive currents and the light emission brightness, only store independent one group of list data of representing drive current-light emission light characteristic by hypothesis.Like this, owing to do not need to prepare corresponding driving electric current-light emission illuminometer to each LED, just can reduce required time span of DATA REASONING and nonvolatile memory 404 does not need to have very big memory capacity.

(3) when determining that opening lighting device 320 will offer the current value of each LED, be calculated as follows relative ratio, promptly be stored in (maximal value and ratio in the represented value of the group of m * n) photometric data, and the current value of reading in the form from nonvolatile memory 404 be multiply by the ratio that this calculates in the nonvolatile memory 404 corresponding to the represented value of the photometric data of the LED that to be ready determining its current value.Like this, to those lower LED of emission luminance brightness when equivalent electric current being provided for all LED, promptly light emission luminance level lower (lower light emission efficiency) thus LED difference between the light emission luminance level that bigger electric current revises each LED is provided.By this correction, when LED11A when mnA opens, because all LED launch and have the roughly light of uniform luminance level, so just can illuminate by making body equably.

(4) owing to revised following difference, promptly illuminate the caused luminance difference of difference between the illumination distances D ' of the LED that illumination distances D that LED1 (n/2) A at center, visual angle realizes and other each its shooting visual field of being illuminated be different from LED1 (n/2) A, so just regulated light emission brightness, thereby it is for the light of the LED1 that illuminates the center, visual angle (n/2) A is launched brightness, bigger than the light emission brightness increase degree of the LED of the scope of close visual angle limit point to illumination.So, when LED11A when mnA opens, the whole zone in the visual angle of just throwing light on equably, and reach roughly uniform brightness.

(5) (some photocells throw light on and are realized the non-uniform illumination of having a mind to wherein using the particular range in each photocell illumination visual angle by making body in the individual photocell of m * n) by only using.So just can realize the illumination effect wanted as photographers such as luminous point eliminations.

(6) data of the multiple illumination pattern of expression are stored in the nonvolatile memory 404 in advance, and by the repeatable operation pattern switch SW 1 are set and circulate and select various illumination patterns.Therefore can easily select the illumination pattern of wanting.

(7) can show m (OK) * n (row) grid square at display device 403 places, each grid square is corresponding to (in the individual photocell of m * n) one, setting (affirmation) is used for photoemissive each photocell is shown as the white demonstration, be shown as black display and setting (affirmation) is not used in photoemissive each photocell.Therefore photographer can easily determine luminous used specific illumination pattern with vision.

With reference to the explanation that first embodiment did,, also can store that (the group data of m * n), every group of data are corresponding with a LED as the front although in nonvolatile memory 404, only stored independent one group of LED drive current-light emission illuminometer data.

The LED11A that constitutes lighting device 320 can be arranged to circular array, oval-shaped array or quadrate array to mnA, and does not adopt the rectangular array in the foregoing description.

Can launch the illuminometer data storage to photometric data and drive current-light in common RAM rather than nonvolatile memory 404.Should use reserve battery to keep being stored in data content among the RAM.

Lighting device 320 can comprise an optical receiving sensor of realizing the brightness regulation instrumental function.In this case, just can and need not to use brightness regulation instrument separately in the light emission brightness (can carry out self check) of lighting device 320 self each LED of internal measurement.

If lighting device 320 can be carried out self check, photometric data and drive current-light emission illuminometer data just can be stored in the storer (RAM) that can not keep to be stored in data content wherein so.Just should carry out self check at every turn when in this case, starting lighting device 320 and should launch the illuminometer data storage to the photometric data that obtains by self check and drive current-light in storer.

In order to make LED11A to the particular range different in the visual angle that can throw light on of each LED among the mnA with the illumination zone of other LED, the orientation that should regulate each LED perhaps should change the direction of the luminous flux of launching at LED11A to change the direction of the luminous flux of launching from LED as opticses such as lens or prisms to the exiting side placement of mnA.For most convenient in actual use, the visual angle can be set make it along continuous straight runs and cover 120 ° of scopes and vertically cover 110 ° of scopes.

In above-mentioned explanation, the data storage of the expression light that each LED realizes when equivalent electric current is provided emission luminance level is in nonvolatile memory 404.The current value that instead, can also storage representation will offer each LED for the light of launching the uniform luminance level from each LED.

(the 4th embodiment)

In the 4th embodiment, thus make LED11A select in the mnA to be used for photoemissive LED emission light with the luminance level illumination having a mind to change by making body.Attention is similar to the 3rd embodiment, launches brightness (brilliance control) thereby the realization optimum exposure by the whole light that exposure calculating control realizes with lighting device 320.

Not only can press and determine switch SW 6, determine switch SW 6 but also can rotate.Rotate when cursor as explained earlier is crossed is positioned at the square place that has confirmed on the display device 403 and determine switch SW 6, CPU401 just changes the brightness that this square place white shows accordingly with definite switch degree of rotation.Determine that switch just increases display brightness if turn right, determine that switch just reduces display brightness if turn left.

Determine switch SW 6 if the operator presses, CPU401 just confirms the white display brightness level to the current selection of this square.If press four-way switch SW2 any one switch in the SW5 after confirming, so just produce a new blinking cursor, and make that this cursor begins from confirmed position to move in the direction corresponding with the four-way switch indicated direction of being pressed.Do not produce new cursor (if promptly double pressing determined switch SW 6) if press definite switch SW 6, CPU401 just will be by the illumination pattern of light emission realization being registered as by the represented illumination pattern of each foursquare current open/close state so.Selected illumination pattern comprises monochrome information as top.So as shown in figure 16, any illumination pattern of operator's appointment can both be presented on the display device 403.In the pattern shown in Figure 16, the LED group that illuminates inside circumference zone, visual angle is set at the higher brightness level that realizes, and the LED group that illuminates middle section is set at the lower luminance level of realization.To note setting LED and to make it to realize that the luminance level of this variation is not that the degree of irregularity of brightness minimizes in the visual angle in order making, but in order to cause the variation of brightness wittingly.

In this state, the CPU401 response is opened LED from the light firing order that camera cpu receives, and each LED has the luminance level of the variation corresponding with the illumination pattern.That is to say, regulate light emission brightness, thereby for the light emission brightness of the LED group of middle section in those visual angles that are used for throwing light on, increase the light emission brightness that is used for throwing light on more towards the LED of the scope of end, visual angle.

In the 4th above-mentioned embodiment, regulate respectively the particular range that differs from one another in the visual angle that is used for throwing light on (luminance level that the individual photocell of m * n) is realized, thus realize the non-uniform illumination of having a mind to.Like this, with in the 3rd embodiment selectively some photocells of opening/closing compare, just can realize meticulousr illuminating effect.In addition, show m (OK) * n (row) grid square at display device 403 places, corresponding (the photocell in the individual photocell of m * n), and regulate expression according to the light emission brightness that will realize and set the luminance level that (affirmations) is used for the white demonstration of photoemissive each photocell of each square at the photocell place.Photographer can determine luminous used specific illumination pattern with vision at an easy rate like this.

If the difference degree between each LED is small enough to ignore, so just can omit correction to luminance level difference between each LED.

In addition, if inconsistent being small enough between the luminance level of the luminance level of middle section and neighboring area ignored in the visual angle, so just can omit correction to luminance difference in the visual angle.

Can replace LED to constitute photocell with bulb.

Although pass through to change luminance level (low/height) the realization non-uniform illumination intentionally at each photocell place, also can be by the non-uniform illumination that the colorama replacement reduces or rising brightness is realized ideal with the photocell emission.

(the 5th embodiment)

Figure 17 shows the Electrofax system that realizes in fifth embodiment of the invention.As shown in figure 17, interchangeable taking lens 520 is installed on the Electrofax body 510.In addition, lighting device 530 is installed on the accessory slot (not shown) of Electrofax 510.

Figure 18 is the structural drawing of the basic structure that adopted of the Electrofax system among Figure 17.LED (light emitting diode) 532 and the optical transmission circuit 531 that provides with LED are provided lighting device 530, and lighting device 530 is installed on the Electrofax body 510.The communication contact point (not shown) that lighting device 530 exists by the accessory slot place engages with the CPU at camera body 510 places communicates by letter, thereby receives the instruction that makes LED532 luminous (opening LED532) and close LED532, the signal of expression light emission brightness etc.

CPU601 in the Electrofax body 510 is made of ASIC etc.The arithmetical operation that CPU601 puts rules into practice by the signal that uses each module that below will describe in detail to input to it, and exporting to each module according to the resultant control signal of arithmetical operation.

Be directed to image capturing component 621 places to what entered Electrofax body 510 through taking lens 520 by the making body luminous flux through the shutter (not shown).Image capturing component 621 is made of ccd image sensor etc.Image capturing component 621 is caught by the image that is formed by the making body luminous flux and the image capturing signal and is exported to A/D change-over circuit 622.A/D change-over circuit 622 is converted to digital signal to the analog image lock-on signal.

The view data that CPU601 is converted to numeral is carried out Flame Image Process such as for example white balance processing, handle the Image Data Compression through Flame Image Process is become predetermined form thereby also carry out compression, thus and the view data compressed of decompression processing decompress(ion) etc.Recording medium 626 constitutes by can removably being loaded into storage card in the Electrofax body 510 etc.The Imagery Data Recording of process Flame Image Process is in recording medium 626.

Image regeneration circuit 624 is used for the reproduced picture data presented by using unpressed view data (view data that waits to compress or the view data of decompress(ion)) to produce.On the display device 625 that can constitute, by using reproduced picture video data display image by for example LCD.

Operating parts 607 comprises the shutter release switch with the operation interlocking of shutter release button (not shown), and operating parts 607 is to the CPU601 output operation signal corresponding with each switch.

Lens location sniffer 602 is surveyed the position of zoom lens (not shown) in the taking lens 520 and detectable signal is exported to CPU601.Zoom lens position sensing signal is corresponding with focus information.Photometer device 603 is surveyed by the making body light quantity and to CPU601 output detectable signal.

CPU601 calculates by making body brightness BV according to the detectable signal of photometer device 603 outputs.When lighting device 530 is set in can radiative state the time, CPU601 is provided with SV by making body brightness BV and current images acquisition sensitivity and carries out specific exposure calculating by what use that current f-number is provided with that AV, current shutter speed be provided with that TV, aforementioned calculation come out, thereby determines the light quantity that need emit from lighting device 530.In addition, CPU601 determines the light angle of lighting device 530 according to focus information, thus the zone in the visual angle of throwing light in the best way.That is to say, determine light angle according to the visual angle that employed specific taking lens 520 is limited.

According to the present invention, regulate the open/close state of LED532 according to light angle.

The light firing order opening/closing LED532 that optical transmission circuit 531 response CPU601 provide.The signal that the light firing order that CPU601 sends comprises light emission commencing signal, light emission end signal, the signal of the light quantity that emits from each LED of indicating and indicating utilizes the illumination angle that lighting device 530 realizes.CPU601 transmits light emission commencing signal and makes that becoming standard-sized sheet rear lighting unit 530 at the shutter (not shown) enters open mode, and CPU601 also transmits light emission end signal and makes that beginning to close rear lighting unit 530 at the shutter (not shown) enters closed condition.

Figure 19 shows an example of the structure that can use together with LED532 and optical transmission circuit 531.In being shown in the example of Figure 19, a total n White LED 532-1 is to 532-n.Can open and close each LED independently of one another.Known LED is the device of Current Control, shows proportional relation between drive current and the light emissive porwer (luminous power) in its rated range.The light firing order of CPU601 output inputs to illumination control circuit 533.

The light quantity command content that illumination control circuit 533 provides according to CPU601 determines to offer the current value of each LED that will open, and give led drive circuit 534 transferring command, make driving circuit 534 electric current of the current value that realization determines like this is provided for corresponding LED.So just controlled the luminance level that realizes when opening designated LED.

The light of each LED emission luminance level and offer the relation data representation that obtains according to actual measured results between its electric current, these data are stored in the nonvolatile memory in the illumination control circuit 533 with the form of form in advance.Illumination control circuit 533 makes to be used up emission brightness and tables look-up as independent variable and the levels of current that need provide is provided.Illumination control circuit is indicated the current value of determining like this to led drive circuit 534 then.The order of led drive circuit 534 response illumination control circuits 533 outputs offers corresponding LED to electric current.Notice that battery E is the power supply that illumination control circuit 533 and led drive circuit 534 use.

Figure 20 shows the light emitting window 535 of lighting device 530 (seeing Figure 17) when being observed by the making body side.As shown in figure 20, n LED532-1 is arranged to circular array to 532-n.The light of launching from each LED all pass be formed on light emission windows 535 camera lens to being advanced by making body.LED532-1 has directivity to each LED among the 532-n makes it the preset range that throws light on, and the center of the illumination zone of each LED differs from one another.

Figure 21 is the cut-open view of lighting device 530 along dot-and-dash line A-A ' among Figure 20, shows the illumination zone of each LED.Figure 21 is a simple view, and it only shows 7 LED that exist on the section.Upper area U from illumination light process camera lens 535 guiding Figure 21 that LEDA1 emits.From the illumination light of LEDA4 through the vertical direction guiding middle section C of camera lens 535 in Figure 21.In addition, from the lower area D of illuminated light guide in Figure 21 of LEDA7.Similarly, the illuminating light flux that emits from LEDA2, LEDA3, LEDA5, LEDA6 passes through the different position of camera lens 535 guiding, thereby fills the illumination zone of above-mentioned LEDA1, LEDA4 and LEDA7.Therefore, LEDA7 differs from one another to the illumination zone of LEDA1.Middle section C is corresponding with the center of coverage, and upper area U and lower area D are corresponding to the neighboring area in the coverage.

Although by using the explanation above the cut-open view of vertical direction has provided with reference to Figure 21, the center that comprises camera lens 535 in this cut-open view, certainly can also also comprise the center of camera lens 535 in these sections with realizing different illumination zones along horizontal direction with LED in a similar fashion to the section of angular direction.As mentioned above, since the scope that a plurality of LED have thrown light on and differed from one another, the whole coverage so lighting device 530 can throw light on equably.Notice that the illumination zone of setting each LED makes the illumination zone of adjacent LED overlap, the even like this illumination light intensity that distributed.

The LED that the content choice that illumination control circuit 533 instructs according to the light angle that CPU601 provides will be opened, and give the led drive circuit order that selected LED is opened in 534 outputs.Handle by this, just controlled the light angle that lighting device 530 is realized.In this embodiment, when zoom lens is set in wide-angle side, thereby n LED532-1 opens the light angle that realizes maximum possible to 532-n.When zoom lens is set in narrow angle side (taking the photograph the distally), thereby the LED number that minimizing will be opened is realized the less light angle corresponding with the zoom lens position.

The light angle of expression lighting device 530 and be stored in the nonvolatile memory in the illumination control circuit 533 with the form of form in advance for the data that realize concerning between the LED that light angle will open.Illumination control circuit 533 uses focus information to table look-up as independent variable, and sends the LED that instruction makes it to open the list data indication for led drive circuit 534.Led drive circuit 534 responds the order of illumination control circuit 533 outputs again and electric current is provided for the LED that will open.

Figure 22 shows when reducing the light angle of lighting device 530 from by the state of the observed light emission windows 535 of making body side.As shown in figure 22, in 532-n, do not open the LED (remaining on closed condition) that is positioned at the outside at the n that is arranged to a circular array LED532-1.The LED of black represents the LED that do not open.

Figure 23 is the cut-open view of lighting device 530 along dot-and-dash line B-B ' among Figure 22, and it shows the illumination zone of LED532 when reducing light angle.The same with Figure 21, on section, only show 7 LED.It is with the difference that is shown in the state of Figure 21: because LEDA1, A2, A6 and A7 remain on closed condition, so do not illuminate upper area U and lower area D.

Figure 24 shows when further reducing light angle from by the state of the light emission windows 535 of the observed lighting device 530 of making body side.In 532-n, only open the LED of center among Figure 24 at n LED532-1.In this embodiment, when zoom lens is set in narrow angle end (taking the photograph far-end), in 532-n, is present in the LED of center and allows other LED remain on the light angle that closed condition is selected minimum by only opening n LED532-1.

As mentioned above, with the center in the LED illumination visual angle that is placed on the center among n the LED, with the neighboring area in the LED illumination visual angle that is placed on peripheral position among n the LED.In order to enlarge light angle, illumination control circuit 533 increases the LED number that will open gradually, begins finally to include towards the LED of periphery being positioned at more from the LED that is positioned at the center exactly specifically.

The 5th above-mentioned embodiment realized following advantage.

(1) at lighting device 530 places (White LED 532-1 is to 532-n) that constitute by a plurality of photocells, the light angle that the photocell number realization that will open by adjusting needs.Thereby determine throw light in the best way scope in the visual angle of light angle according to focus information.Different with the technology in the association area, this method does not need mechanical travel mechanism, thereby has realized not only compact but also light lighting device 530.In addition, owing to,, can regulate light angle quickly so compare with the adjusting that utilizes mechanical move operation to realize by selecting to want the specific LED of opening/closing just can regulate light angle simply.This feature is effective especially in the continuous shooting operation process of being undertaken by adjusting zoom amplification factor.

(2) because photocell is made of White LED, the electric power requirement is just so much unlike discharge control type light sources such as xenon pipes.In addition, lighting device does not need the high-voltage charging circuit to cause the discharging light emission.In addition,, can regulate light emission luminance level pro rata, regulate thereby be convenient to light output with the current value that is provided on it by using LED.

Although LED532-1 is arranged to circular array to 532-n in above-mentioned lighting device 530, LED also can be arranged to rectangular array or the oval-shaped array of elongation on the horizontal direction corresponding with the shape on photographic images plane (as along the horizontal direction elongation).

In the explanation that provides in the above, send from each LED, pass the scope that the luminous flux illumination of camera lens 535 differs from one another.As the optional mode of another kind, can not use camera lens 535, thereby but arrange the scope that lens make that each LED throws light on and differs from one another at each LED place.Figure 25 is a lighting device cut-open view vertically, and it shows the illumination zone of each LED, and each LED has the lens that self are arranged on wherein.The lower area D of illumination light in Figure 25 from LEDB1 advances.Illumination light from LEDB4 is advanced along the middle section C of vertical direction in Figure 25.In addition, the upper area U of illumination light in Figure 25 from LEDB7 advances.Similarly, advance to different positions, thereby fill the illumination zone of above-mentioned LEDB1, LEDB4 and LEDB7 from the illuminating light flux that LEDB2, LEDB3, LEDB5 and LEDB6 emit.

Although by using the explanation above the cut-open view of vertical direction has provided with reference to Figure 25, can also use in a similar fashion along horizontal direction and the different illumination zone of LED realization to the section of angular direction.As mentioned above, since the scope that a plurality of LED have thrown light on and differed from one another, the shooting area so lighting device 530 can throw light on equably.Notice that the illumination zone of setting each LED makes the illumination zone of adjacent LED overlap, so just the same with the embodiment that explains above, the more even illumination light intensity that distributed.

In the explanation that provides in the above, as shown in figure 20, place with uniform density to 532-n to a neighboring area n LED532-1 from middle section.Under normal circumstances, compare with the middle section in the coverage, the brightness by making body with lighting device lighting in the coverage neighboring area is lower.Particularly be arranged on when wide-angle side (towards broad side) when zoom lens, it is very low that the light quantity in the neighboring area becomes.It is desirable to compensate the low light quantity on the coverage inside circumference zone, this can realize by the LED density that increases illumination coverage inside circumference zone, promptly compare, the LED placement De Gengmi in illumination coverage inside circumference zone with the LED of the middle section density of placing in the illumination coverage.

The another kind of method of the low light quantity in coverage inside circumference zone can not change the density that LED places by way of compensation, but increases the light emission luminance level that the LED of the coverage neighboring area that is used to throw light on realizes.In this case, illumination control circuit 533 send instruction should for led drive circuit 534 and make: for the current value of the LED of the middle section that offers the illumination coverage, the current settings of LED that offers the neighboring area of illumination coverage becomes bigger value.

Thereby can control light quantity increase coverage the center by making body brightness.When zoom lens is set in when taking the photograph the distally, the illumination light of lighting device may can't arrive always away from camera (lighting device) by making body.At this moment can by increase be used to throw light on the density of LED of middle section of coverage throw light on be positioned at than distant positions by making body, promptly for the density that the LED of the neighboring area of illumination coverage places, the density that the LED of the middle section of illumination coverage places is higher, thereby with the middle section of concentrated optical illumination coverage.

Replacement is placed the change of density to LED, can increase the light emission luminance level of LED of the middle section of the coverage that is used to throw light on, thereby with the middle section of bigger brightness illumination coverage.In this case, illumination control circuit 533 send instruction should for led drive circuit 534 and make: for the current value of the LED of the neighboring area that offers the illumination coverage, increase the current value of the LED of the middle section that offers the illumination coverage.

Can be so that the guide number of wide angle shot operation and the guide number coupling of taking the photograph shooting operation far away.In this case, for the density that the LED of the middle section of illumination coverage places, should increase the density of LED of the neighboring area of illumination coverage, thereby guarantee difference not occur between the luminance level of the luminance level of middle section in the coverage and neighboring area.In addition, when zoom lens set more when taking the photograph far-end, illumination control circuit 533 send instruction should for led drive circuit 534 to come further increase will offer the current value of each LED.

In the explanation that provides in the above, the illumination zone that the luminous flux of launching from each LED is realized roughly be equal to each other (directivity that LED realizes uniformity).Instead, for example at the n that is arranged to a circular array LED532-1 in 532-n, can realize above-mentioned directivity from the luminous flux that the LED that is positioned at the center launches, and can set lowlyer than the directivity of the luminous flux of central LED from the directivity that is positioned at the luminous flux that more outer LED launches.That is to say, compare with the LED that is placed on the center, can be with being placed on more the LED of the outside wideer illumination zone of throwing light on.

Although in the 5th embodiment, used external lighting device 30,320 and 350, also can combine and adopt the present invention with the lighting device in being built in camera body at above-mentioned first.

This camera with internal illumination device can be the portable telephone that is equipped with camera.

Above-mentioned camera body can be digital camera or silver halide type camera.

The above embodiments are some examples, need not to depart from the spirit and scope of the present invention and just can carry out various improvement.

Claims (5)

1. lighting device that is used to take comprises:

A lighting unit, this lighting unit have a plurality of current-control type photocells, and described lighting unit uses the optical illumination of launching from described a plurality of photocells by making body;

A storage unit, this cell stores light emission monochrome information, described light emission monochrome information comprise the data of the relation between the electric current of pilot light emission brightness corresponding with each photocell in described a plurality of photocells and supply and are used to revise difference between described a plurality of photocell; With

A light emission controlling unit, this light emission controlling unit is launched the light emission that monochrome information is controlled described a plurality of photocells place according to the light that is stored in the storage unit, makes described a plurality of photocell realize uniform luminance level on by making body.

2. the lighting device that is used to take according to claim 1, wherein:

Light emission monochrome information comprise be illustrated in the light emission brightness data that provides the light emission luminance level that realizes in described a plurality of photocells of scheduled current place and with corresponding electric current-light emission light characteristic data of predetermined photocell in described a plurality of photocells; And

The light emission controlling unit is regulated the current value that will offer each photocell according to following ratio, this ratio provide the light emission luminance level that described each photocell place of scheduled current realizes and with by with the ratio of the corresponding light emission luminance level of the scheduled current shown in the corresponding electric current-light emission light characteristic data indication of described predetermined photocell.

3. the lighting device that is used to take according to claim 1, wherein:

Light emission monochrome information comprise the light of indicating to make described a plurality of photocell can launch the predetermined luminance level need offer described a plurality of photocells electric current the electric current supply data and with corresponding electric current-light emission light characteristic data of predetermined photocell in described a plurality of photocells; And

The light emission controlling unit is regulated the current value that will offer each photocell according to following ratio, this ratio be for realize the predetermined brightness level to offer described each photocell electric current and with by with the ratio of the corresponding supply of current of the predetermined luminance level shown in the corresponding electric current-light emission light characteristic data indication of described predetermined photocell.

4. the lighting device that is used to take according to claim 1, wherein:

Storage unit comprises a nonvolatile memory or a volatile memory, will give this volatile memory power supply in order to keep memory contents.

5. a camera comprises the lighting device that is used to take according to claim 1.

Images