WO2006049105A1 - 表示装置および電子装置 - Google Patents
表示装置および電子装置 Download PDFInfo
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- WO2006049105A1 WO2006049105A1 PCT/JP2005/019922 JP2005019922W WO2006049105A1 WO 2006049105 A1 WO2006049105 A1 WO 2006049105A1 JP 2005019922 W JP2005019922 W JP 2005019922W WO 2006049105 A1 WO2006049105 A1 WO 2006049105A1
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- display unit
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/02—Composition of display devices
- G09G2300/023—Display panel composed of stacked panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0469—Details of the physics of pixel operation
- G09G2300/0473—Use of light emitting or modulating elements having two or more stable states when no power is applied
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0469—Details of the physics of pixel operation
- G09G2300/0478—Details of the physics of pixel operation related to liquid crystal pixels
- G09G2300/0482—Use of memory effects in nematic liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0245—Clearing or presetting the whole screen independently of waveforms, e.g. on power-on
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0606—Manual adjustment
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0613—The adjustment depending on the type of the information to be displayed
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
- G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3622—Control of matrices with row and column drivers using a passive matrix
- G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
Definitions
- the present invention relates to a display device capable of displaying images and characters, and an electronic device equipped with such a display device.
- Thin display devices are widely used in electronic devices such as mobile phones, digital cameras, and PDAs.
- a display device using a nematic liquid crystal element an image formed on the liquid crystal element is made visible by illuminating a transmissive liquid crystal element whose transmittance is controlled for each pixel from the back. Since the liquid crystal element itself does not emit light, an illumination member (for example, a backlight) that illuminates the liquid crystal element is required.
- an organic EL (electroluminescence) element that emits light from the element itself is used instead of a liquid crystal element, and a backlight member is unnecessary.
- Such configurations of the liquid crystal display device and the organic EL display device are disclosed in, for example, Patent Document 1 and Patent Document 2.
- cholesteric liquid crystal or PN liquid crystal polymer network liquid crystal
- display devices such as Les, so-called electronic paper and electronic book (registered trademark) (for example, patents).
- Reference 3 and Patent Reference 4 These use outside light as illumination light, and are configured such that the transmission state Z reflection state of the liquid crystal element can be switched for each pixel.
- Pixels switched to the reflective state diffusely reflect external light and are viewed as whitish in, for example, a PN liquid crystal, and pixels switched to the transparent state transmit external light.
- an absorption layer such as a black plate that absorbs external light is provided below the liquid crystal, the pixel is visually recognized as dark.
- Such a display device consumes little power because it does not emit light.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2004-125962
- Patent Document 2 JP-A-2004-127662
- Patent Document 3 Japanese Patent Laid-Open No. 2003-140114
- Patent Document 4 JP 2003-98541 A
- the display device includes a first display unit that performs light emission display by controlling the light emission amount for each pixel, a transmission state that transmits external light, and a reflection that is reflected.
- a second display unit that displays in a combination of a transmissive region and a reflective region, and the first display unit can be visually recognized through the transmissive region of the second display unit.
- the second display portion is stacked on the first display portion.
- the second display unit corresponds to at least the display area of the first display unit. It is preferable that the second display area be a transmissive area.
- the first display unit corresponds to the display area of the second display unit. It is preferable that all the pixels in the display unit 1 be in the non-emission state.
- the first display unit displays the transmission area of the display area of the second display unit. It is preferable that the pixels of the first display portion corresponding to the predetermined area to be included are in the emission state and the other pixels are in the non-emission state.
- the second display unit when the second display unit performs display in the display area and the first display unit simultaneously performs display in the other display area.
- the second display unit preferably uses a region corresponding to another display region of the first display unit as a transmission region.
- the display device further includes a display control unit that selects either the first display unit or the second display unit according to conditions, table When the display unit is selected, the second display unit selects at least the second display unit region corresponding to the display region of the first display unit as the transmission region, and selects the second display unit.
- the first display unit puts pixels corresponding to the reflection area of the second display unit into a non-emission state.
- the display device further includes a detection unit that detects display content, and the display control unit and the first display unit and the first display unit according to the detection result of the detection unit. It is preferable to select the difference between the two display sections.
- the display device further includes a detection unit that detects ambient brightness, and the display control unit is detected by the detection unit to be equal to or higher than the predetermined brightness. It is preferable to select the second display unit when it is selected, and to select the first display unit when it is detected that the brightness is lower than the predetermined brightness.
- the display device further includes a detection unit that detects the remaining amount of the power battery, and the display control unit has a remaining amount equal to or greater than a predetermined value by the detection unit. It is preferable to select the first display unit when it is detected, and to select the second display unit when it is detected that it is less than the predetermined value.
- the display device further includes a display control unit that controls display of the first display unit and the second display unit, and the display control unit includes: Instructing the first display unit to perform drawing, and instructing the second display unit to set at least the pixels of the second display unit corresponding to the drawing area of the first display unit to the transmissive state (2 ) Instructs the second display unit to draw the same content as the first display unit except at least the display color, and sets the pixels of the first display unit corresponding to the drawing area by the second display unit to the second display unit.
- the first display unit is instructed to draw in a predetermined color in synchronization with the drawing speed by the display unit.
- at least the display control for the first display unit is performed. It is preferable to stop.
- the display device further includes a display control unit that controls display of the first display unit and the second display unit, and the display control unit includes: Instructing the first display unit to perform drawing, and instructing the second display unit to set at least the pixels of the second display unit corresponding to the drawing area of the first display unit to the transmissive state (2 ) Second display It is preferable to instruct the unit to draw the same content as the first display unit, and (3) after the drawing by the second display unit is finished, at least the display control for the first display unit is stopped.
- the first display unit has a liquid crystal element as a display element and performs light emission display using a backlight. Is preferred.
- the first display unit in the display device according to any one of the first to eleventh aspects, it is preferable that the first display unit has an electroluminescent element as a display element. According to the fourteenth aspect, in the display device according to any one of the first to thirteenth aspects, the first display unit preferably performs color display.
- the second display unit has a display element capable of maintaining the display state when the power is off. It is preferable.
- the second display section preferably has a cholesteric liquid crystal element as a display element.
- the second display unit preferably includes a polymer network liquid crystal as a display element.
- the first display unit has an active drive display element, and the second display unit is a passive drive display. It is preferable that the drawing speed of the second display unit is lower than that of the first display unit.
- the display device further includes an illuminating unit that illuminates the first display unit, and the stop of the display control includes turning off the illuminating unit.
- the first display unit has a self-luminous display element, and the display control is stopped by stopping the power supply to the first display unit. Is preferably included.
- the second display section preferably maintains the transmission and reflection states controlled for each pixel even after power supply is stopped.
- an electronic device includes the display device according to the first aspect, and a display control unit that controls display on the first display unit and the second display unit.
- the display control unit permits display of at least the first display unit when the electronic device is turned on, and when the electronic device is turned off. It is preferable that display of the first display unit is disabled and display of the second display unit is permitted.
- the display control unit may be connected to the second display unit when the power is off and the display content on the second display unit is updated. It is preferable to control the power supply to supply power.
- the display control unit performs display on the first display unit when the power is turned on, and when the power is turned off, the second table It is preferable to switch to the display and display.
- the display control unit when the power is turned on during display on the second display unit, the display control unit turns on the first display unit. It is preferable to switch the display.
- the display control unit is configured such that when no operation is performed for a predetermined time during display on the first display unit, the second control unit It is preferable to switch to the display unit for display.
- the display control unit switches to the first display unit for display. Is preferably performed.
- the electronic device of the twenty-second aspect further includes a setting unit that sets an operation mode, and the display control unit is configured to display the display device according to the operation mode set by the setting unit. It is preferable to switch the display between the first display unit and the second display unit.
- the display control unit includes: It is preferable to switch the display by the display device between the first display unit and the second display unit in accordance with the display content displayed on the display device.
- the display control unit disables display by the second display unit during a preset time period and permits display by the first display unit.
- the display content on the first display unit preferably includes an image.
- the display content on the second display unit is date, time lj, left / right remaining amount, menu information, user information.
- the input information preferably includes at least one of the input information.
- the electronic device further includes a photographing unit, and the display content on the second display unit includes photographing history, photographing conditions, It is preferable to include at least one of the captured images.
- the electronic device further includes a communication unit that communicates with a device external to the electronic device, and the display content on the second display unit is: It is preferable to include information obtained by communication by the communication unit.
- the display control unit preferably updates the display content on the second display unit every predetermined time.
- the display by the second display unit does not require power to continue displaying the same content.
- the display by the first display unit is preferably capable of color display.
- the display unit is replaced with a display unit
- the display control unit is replaced with a display control unit
- the illumination unit is replaced with a lighting unit
- the setting unit is set with a setting unit
- the photographing unit is replaced with a photographing unit
- the communication unit is replaced with a communication unit. Good.
- the first display unit that performs light emission display by controlling the light emission amount for each pixel, and the transmissive state for reflecting external light and the reflective state for reflecting can be set for each pixel.
- the second display unit is stacked on the first display unit so that the first display unit can be seen through the transmission area of the second display unit.
- An appropriate display can be selected and used, which contributes to power saving.
- the first display unit can be used as the absorption layer necessary for the second display unit, a separate absorption layer is unnecessary, and the number of parts can be reduced.
- the two types of display units are in a stacked state, the arrangement space is almost the same as when one type of display unit is provided.
- FIG. 1 is a front view illustrating a configuration of a display device.
- FIG. 2 is a side view illustrating a configuration of a display device.
- FIG. 3 is an enlarged view of a part of FIG.
- FIG. 4 is a control block diagram of the display device.
- FIG. 5 is a diagram for explaining image display.
- FIG. 6 is a diagram for explaining character display.
- FIG. 7 is a diagram for explaining mixed display.
- FIG. 8 is a diagram for explaining color display of characters.
- FIG. 9 is a flowchart illustrating a drawing processing procedure performed by a CPU.
- FIG. 10 is a diagram for explaining drawing by the first display module.
- FIG. 11 is a diagram for explaining drawing by the second display module.
- FIG. 12 is a diagram for explaining drawing by the first display module.
- FIG. 13 is a diagram illustrating a PDA equipped with a display device.
- FIG. 14 is a flowchart illustrating a drawing processing procedure performed by a CPU.
- FIG. 15 is a top view of a digital camera equipped with a display device.
- FIG. 16 is a rear view of the digital camera.
- FIG. 17 is a front view of the digital camera.
- FIG. 18 is a control block diagram of the display device.
- FIG. 19 is a diagram showing a display example when the power is turned off, showing an example of displaying the date and time.
- FIG. 20 is a diagram similar to FIG. 19, showing an example in which shooting history is displayed.
- FIG. 21 is a diagram similar to FIG. 19, showing an example in which shooting conditions and the like are displayed.
- FIG. 22 is a diagram similar to FIG. 19, showing an example in which menu items are displayed.
- FIG. 23 is a view similar to FIG. 19, showing an example in which one image is displayed.
- FIG. 24 is a diagram similar to FIG. 19, showing an example in which multiple images are displayed as thumbnails.
- FIG. 25 is a diagram similar to FIG. 19, showing an example in which a plurality of types of display are performed simultaneously.
- FIG. 26 is a front view, a side view, and a rear view of a mobile phone on which a display device is mounted.
- FIG. 27 is a block diagram of a mobile phone control system.
- FIG. 28 is a diagram showing a modification of the display device.
- FIG. 29 is a diagram showing a further modification of the display device.
- FIG. 30 is a diagram showing a further modification of the display device.
- the display device 100 is mounted on an electronic device (electronic device) such as a PDA 200 or a mobile phone (not shown), a digital camera, or an electronic book view. Is.
- FIG. 1 and 2 are diagrams for explaining the configuration of the display device 100, FIG. 1 is a front view, and FIG. 2 is a side view.
- the display device 100 displays an image, text, etc. in the effective display area 100a.
- the display device 100 is configured by laminating a first display module 10 and a second display module 20.
- the two stacked display modules 10 and 20 are illuminated from the first display module 10 side by a knock light member.
- the backlight member includes a high-intensity white LED 141, an LED substrate 142 on which the white LED 141 is mounted, and a light guide plate 14.
- the light guide plate 14 has an area larger than at least the effective display area 100a.
- the light guide plate 14 is emitted from the white LED 141, and light incident on the light guide plate 14 from the side surface (right in FIGS. 1 and 2) of the light guide plate 14 is illuminated with uniform brightness within the effective display area 100a.
- the light is converted into bright light, and the first display module 10 is illuminated with the surface illumination light.
- the observer observes the display image from above in FIG.
- Display data, drive signals, and the like are supplied to the first display module 10 and the second display module 20 from flexible display boards 150 and 151, respectively, from display control circuits described later.
- FIG. 3 is an enlarged view of a part of FIG. 2 for explaining the internal structure of the display device 100.
- the first display module 10 is constituted by, for example, a well-known TFT liquid crystal panel.
- the liquid crystal 11 is sealed between the two glass substrates 12a and 12b, and the first polarizing plate 13a and the second polarizing plate 13b are disposed so as to sandwich the glass substrates 12a and 12b.
- the polarization direction of the light passing through the second polarizing plate 13b is different from the polarization direction of the light passing through the first polarizing plate 13a by 90 degrees.
- a color filter (not shown) is disposed between the glass substrate 12b and the second polarizing plate 13b.
- the liquid crystal 11 is incident on the liquid crystal layer due to the alignment (orientation) of the liquid crystal molecules in the liquid crystal layer when no voltage is applied from a transparent electrode (not shown) provided inside the glass substrate 12. Rotate the polarization direction of the emitted light by 90 degrees. As a result, the polarized light incident on the liquid crystal 11 through the first polarizing plate 13a is rotated by 90 degrees in the liquid crystal layer, and then passes through the second polarizing plate 13b to pass through the first display module 10. And is incident on the second display module 20.
- the arrangement of liquid crystal molecules in the liquid crystal layer is changed, and the polarization direction of incident light is not rotated by 90 degrees.
- the polarized light incident on the liquid crystal 11 through the first polarizing plate 13a cannot pass through the second polarizing plate 13b.
- the rotation ratio of the polarization direction of the light traveling through the liquid crystal layer is also proportional to the applied voltage. Therefore, the amount of light that passes through the first display module 10 and enters the second display module 20 decreases as the voltage applied to the liquid crystal 11 increases.
- the second display module 20 includes a liquid crystal panel in which a cholesteric liquid crystal 21 is sealed between two glass substrates 22a and 22b.
- the cholesteric liquid crystal 21 is configured so that an arbitrary voltage corresponding to a drive signal supplied from a display control circuit (described later) can be applied to each predetermined region (pixel) divided in a matrix based on an image signal. Has been.
- the liquid crystal 21 to which a voltage is applied from the transparent electrode switches between a transmission state and a reflection state.
- the pixel in the reflective state diffuses and reflects external light and is visually recognized as yellow, for example.
- the pixels in the transmissive state transmit the light image generated by the first display module 10, and the observer visually recognizes the color image displayed by the first display module 10. Since the cholesteric liquid crystal has a memory property, the reflection state (or transmission state) is maintained even when the power supply to the second display module 20 is cut off.
- the effective display area 100a of the display device 100 corresponds to the effective display area of the first display module 10, and the effective display area of the second display module 20 is at least wider than the effective display area 100a. Composed.
- the light guide plate 14, the first display module 10, and the second display module 20 described above are superposed so as to be in close contact with each other to constitute the display device 100.
- FIG. 4 is a control block diagram of display device 100.
- the battery BT supplies power to each block including the CPU 31.
- the first display module 10 is driven and controlled by the display control circuit 32.
- the display control circuit 32 includes a liquid crystal drive circuit 32a that drives the liquid crystal 11 via a transparent electrode, and a backlight control unit 32b that controls lighting of the white LED 141.
- the second display module 20 is driven and controlled by the display control circuit 33.
- the display control circuit 33 drives the liquid crystal 21 through the transparent electrode.
- the CPU 31 transmits the liquid crystal drive command together with the display data to the display control circuits 32 and 33, and reads and writes image data and character data to the image storage device 34 and the recording medium 37. .
- the brightness sensor 35 detects the brightness around the display device 100 and outputs a detection signal to the CPU 31.
- the clock circuit 36 divides the clock signal to generate time information.
- the image storage device 34 is constituted by, for example, a hard disk device.
- the recording medium 37 is composed of a removable memory card, for example.
- a display mode by the display device 100 configured as described above will be described.
- the white LED 141 is turned on and the first display module 10 is turned on. While the reproduced image is displayed on the second display module 20, the second display module 20 makes all the pixels transparent (transparent). The observer observes the display image formed by the display light emitted from the first display module 10 through the second display module 20 in the transmissive state.
- the second display module 20 has a display memory property (the state is maintained even if the power supply is cut off), all pixels are transparent to the second display module 20. After switching to, power supply is cut off and the state is maintained.
- the first display module 10 may be called an image display module.
- the area (pixel) corresponding to the character to be displayed on the second display module 20 is set to the transparent state, and the other area (pixel) is set.
- the driving of the liquid crystal 11 for the first display module 10 is stopped, the power supply is further cut off, and the LED 141 is turned off. Since all the pixels of the first display module 10 are in a non-emission state, that is, blackened by turning off the power supply, the light transmitted through the transmissive area (character part) of the second display module 20 is absorbed by the blackened part. The As a result, the black character displayed on the yellow background is visually recognized by the observer.
- the first display module 10 in the power-off state also serves as an absorption layer necessary for the second display module 20, it is not necessary to separately provide a black plate or the like constituting the absorption layer.
- the area (pixel) corresponding to the character to be displayed on the second display module 20 is set in the reflective state. If the other areas (pixels) are set in the transmissive state, the LED 141 is turned off, and all the pixels of the first display module 10 are blacked out in the non-emission state, the yellow characters are visible on the black background.
- the second display module 20 is a character display module.
- the second display module 20 since the second display module 20 maintains the transmission state or the reflection state even after the power supply is cut off, when the display content is not updated, the first display module 10 and the second display module 20 The power consumption can be minimized by turning off the power supply to both display modules 20.
- the image is displayed on the upper half of the first display module 10 as shown in FIG. And turn the white LED 141 on while the lower half is black.
- the second display module 20 the upper half is in the transparent state
- the area (pixel) corresponding to the lower half of the character is in the transparent state
- the area (pixel) other than the lower half of the character is in the reflective state.
- the observer can observe the reproduction display image by the first display module 10 through the transmission area of the second display module 20 in the upper half of the screen, and the second display module 20 in the lower half of the screen.
- the display characters by black characters on yellow background
- the power supply to the lower half of the first display module 10 can be turned off, and the first display module 10
- the power consumption in the first display module 10 can be reduced to half compared to the case where the same display is performed with a single Yule.
- the mixing ratio between the image display area and the character display area, the number, position, size, and the like of each area may be arbitrarily changed.
- the region (pixel) corresponding to the character of the second display module 20 is made transparent, and the region (pixel) corresponding to a character other than the character is displayed.
- the region (pixel) corresponding to a character other than the character is displayed.
- the area corresponding to the character or a predetermined area including the area corresponding to the character
- the other areas are displayed in black
- the white LED 141 is lit.
- the observer can visually recognize the red color of the first display module 10 through the transmission area (character pixel) of the second display module 20. That is, the display device 100 displays red characters on a yellow background.
- the character is displayed in blue or green, the character is displayed in a color other than red. It can also be made. Moreover, you may make it display changing a color for every character.
- the CPU 31 is configured to automatically select which display mode of FIGS. 5 to 7 is to be used according to the content to be displayed. For example, when the display content is a color image such as a still image, a moving image, or an animation, the CPU 31 automatically selects the display mode illustrated in FIG. When the display content is composed of text or simple patterns, the CPU 31 automatically selects the display mode illustrated in FIG. If the display content is a mixture of images and text, the display mode shown in Fig. 7 is automatically selected. This eliminates the need for the observer to select the display mode, and improves the usability of the display device 100. Note that the display mode may be switched by a selection operation by an observer.
- the display mode of FIG. 6 is usually suitable as described above. Not as long.
- the CPU 31 selects the display mode in FIG. 6 if the detection signal input from the brightness sensor 35 indicates that the brightness is equal to or higher than the predetermined brightness, and the detection signal is less than the predetermined brightness. Is selected, the display mode of FIG. 5 is selected.
- the display mode of FIG. 5 since the backlight (LED 141 in the above example) that illuminates the first display module 10 is turned on, the observer can observe the display contents even when the surroundings are dark.
- a display mode may be selected according to time information from the clock 36.
- the CPU 31 selects the display mode of FIG. 6 in a predetermined time zone (daytime bright time zone), and selects the display mode of FIG. 5 in other time zones.
- the remaining amount of the battery BT is equal to or greater than a predetermined value.
- the display mode of FIG. 5 may be selected, and the display mode of FIG. 6 may be selected when the remaining amount of the notch BT becomes less than a predetermined value.
- the lifetime of the battery BT can be extended.
- the drawing speed is higher than that of the passive drive system, but it is driven (power feeding) when the display content is retained. Need to continue.
- the second display module 20 is a passive drive system, the drawing speed is slower than that of the active drive system, but the display content can be retained even when the drive (power feeding) is stopped.
- the present invention makes effective use of the high-speed drawing characteristics of the first display module 10 and the display holding characteristics of the second display module 20 when the display device 100 displays characters. .
- FIG. 9 is a flowchart illustrating a drawing processing procedure performed by the CPU 31 when the display device 100 displays characters, for example.
- the CPU 31 instructs the first display module 10 to perform drawing and proceeds to step S2.
- text data, a liquid crystal drive command for text display (for example, black characters), and an LED lighting command are transmitted from the CPU 31 to the display control circuit 32.
- the text screen illustrated in FIG. 10A is drawn on the first display module 10.
- step S2 the CPU 31 instructs drawing on the second display module 20, and proceeds to step S3. Specifically, a liquid crystal drive command for making all the pixels transparent is transmitted from the CPU 31 to the display control circuit 33. As a result, the second display module 20 is brought into a transparent state as illustrated in FIG. The observer observes the text screen by the first display module 10 through the second display module 20 in a transparent state. Note that the order of step S1 and step S2 may be reversed.
- step S3 the CPU 31 draws the second display module 20 (the area corresponding to the characters of the second display module 20 is set as a transmission area, and the other areas are set as reflection areas). Or the area corresponding to the characters of the second display module 20 as the reflection area and the other area as the transmission area) and corresponding to the line drawn by the second display module 20
- the area (pixel) on the first display module 10 is instructed to have a predetermined color (for example, black), and the process proceeds to step S4.
- text data and a liquid crystal drive command for text display are transmitted from the CPU 31 to the display control circuit 33.
- the text data is the same as the data transmitted to the first display module 10.
- text is drawn line by line on the second display module 20 as illustrated in FIG. 11B.
- step S2 data corresponding to blackening and a liquid crystal drive command are transmitted from the CPU 31 to the display control circuit 32.
- the first display module 10 is drawn in black one line at a time in synchronization with the drawing processing speed of the second display module 20.
- the observer is observing the text screen in the same way as at the end of step S2.
- step S4 the CPU 31 determines whether or not all lines have been completed.
- the CPU 31 makes an affirmative decision in step S4 when drawing of all lines is completed in the second display module 20, and proceeds to step S5. If all lines are not completed, the CPU 31 returns to step S3 and performs processing. To continue the determination process.
- step S5 the CPU 31 instructs the first display module 10 to stop driving the liquid crystal, turn off the power, and turn off the backlight to the backlight control unit 32b, and then proceeds to step S6.
- the first display module 10 is turned off in a state where all lines are drawn in black.
- step S6 the CPU 31 instructs the second display module 20 to stop driving the liquid crystal and turn off the power supply, and ends the process of FIG.
- FIG. 11C the second display module 20 is turned off in a state where a text screen having the same contents as in FIG. 10A is drawn. The observer is observing the text screen in the same way as at the end of step S2.
- the passive display type second display module 20 is stacked on the active display type first display module 10 to form the display device 100, and drawing is performed on different display modules according to the display contents. It is possible to display various high-contrast images. Nevertheless, power consumption can be minimized.
- the first display module 10 can share the absorption layer necessary for the second display module 20, a separate absorption layer is unnecessary, and the number of parts can be reduced.
- the two types of display modules are in a stacked state, the layout space is almost the same as when one type of display module is provided.
- step S3 When updating the character display, after the drawing by the first display module 10, the same content as the drawing by the first display module 10 is drawn on the second display module 20, and the first For the display module 10, the area (pixel) corresponding to the line drawn by the second display module 20 was blackened (step S3). This causes the second display module 20 to gradually draw the same contents as those drawn by the first display module 10 while maintaining the text screen that was made observable at the end of step S2. Power S can be.
- step S5 When the character display is updated, after the drawing of all the lines by the second display module 20, the first display module 10 is drawn in a state where all the lines of the first display module 10 are drawn in black.
- the liquid crystal drive and power supply of the module 10 were turned off (step S5), and the liquid crystal drive and power supply of the second display module 20 were turned off (step S6).
- step S5 the power S can be greatly reduced while maintaining the text screen that is made observable at the end of step S2.
- the high-speed drawing characteristics of the first display module 10 and the display holding characteristics of the second display module 20 are appropriately used to draw in a short time while reducing power consumption. That power S.
- step S5 the display control is stopped by stopping the liquid crystal drive for the first display module 10 and turning off the power supply to the first display module 10. Instead, the first LED should be instructed to turn off at least the white LED 141. You can continue to supply power to the display module 10. Power consumption can be reduced by turning off the white LED 141.
- the text screen is illustrated as an example of character display, the present invention can be applied to the case of displaying a still image.
- the example in which the second display module 20 displays binary characters has been described.
- a multi-value image can be displayed by changing the driving voltage or using a known dither technique. You can also.
- the present invention may also be applied when displaying a screen in which text information and still images are mixed.
- FIG. 14 is a flowchart for explaining the operation of the CPU 31 at this time.
- Step Sl, step S2, step S5, and step S6 are the same operations as the respective steps shown in FIG.
- FIG. 12 is a diagram exemplifying the drawing contents by the first display module 10 in this case. Since FIG. 12 (a) and FIG. 12 (c) are the same as FIG. 10 (a) and FIG. 10 (c), respectively, description is omitted.
- the CPU 31 in the modified example is illustrated in Fig. 12 (b) while drawing the text line by line as illustrated in Fig. 11 (b) on the second display module 20 in step S30.
- the first display module 10 keeps the text screens of all lines drawn in step S1 as they are. The observer sees the text screen in the same way as at the end of step S2.
- step S40 the CPU 31 in the modified example determines whether or not drawing for the second display module 20 has been completed for all lines.
- the CPU 31 makes a positive determination in step S40 and proceeds to step S5.
- all the lines of the first display module 10 are displayed in black at once (power supply and drive off state).
- the display of the first display module 10 may be a predetermined color (power supply and drive-on state).
- the CPU 31 determines that the drawing for all the lines has not been completed in the second display module 20. Repeat the process.
- the first display module 10 is configured using the TFT liquid crystal module.
- the organic EL module may be used instead of the TFT liquid crystal module. Since the organic EL module emits light from the device itself, the backlight member can be omitted.
- the first display module 10 may be configured using an inorganic EL element. Also, liquid crystal modules other than TFT, such as STN, can be used.
- the second display module 20 may be configured using a P N (polymer network) liquid crystal module instead of the cholesteric liquid crystal module. Since the PN liquid crystal module does not have memory characteristics, driving and power supply are required to maintain the display content, but the display content is maintained with low power consumption because it does not involve the backlight or the device itself. it can. In addition, the cholesteric liquid crystal has a yellow or red reflected light, whereas the PN liquid crystal gives a white reflected light, so it is possible to display black characters on a white background or white characters on a black background. it can.
- P N polymer network
- FIGS. 15 to 17 are a top view, a rear view, and a front view of the digital camera according to this embodiment.
- a power switch (main switch) 91, a release button 92 for instructing the start of imaging, an operation dial 93, and the like are provided on the upper surface of the camera, and a photographing lens 94, a flash window 95 of the flash device, and a viewfinder An objective window 96 and the like are provided, and a plurality of operation members 97 and a display device 100 are provided on the back of the camera.
- main switch main switch
- a release button 92 for instructing the start of imaging an operation dial 93, and the like
- An objective window 96 and the like are provided, and a plurality of operation members 97 and a display device 100 are provided on the back of the camera.
- display device 100 has the same configuration as that of the first embodiment, the description thereof will be omitted, and the same reference numerals will be used hereinafter for reference.
- FIG. 18 shows a control block diagram regarding display control of the digital camera of the second embodiment, and shows only the main configuration.
- the imaging device 337 includes an imaging device, an AZD conversion circuit, an image signal processing circuit, a recording circuit, and the like.
- the imaging device 337 generates image data based on the photoelectric conversion output of the imaging device, and records this on the memory card MC.
- the drive circuit 332 is The image display module (first display module) 10 described above is driven and controlled, and includes a liquid crystal drive circuit 332a that drives liquid crystal via a transparent electrode and a backlight control unit 332b that controls the backlight unit 14. .
- the liquid crystal drive circuit 333 drives and controls the character display module (second display module) 20.
- An operation unit 334 including a power switch 91 and a release switch and a clock 335 are also connected to the CPU 331 which is a control means (circuit) that controls the entire apparatus.
- the CPU 331 and each circuit receive power from the battery BT.
- a display example when the display device 100 is used in a digital camera will be described.
- the digital camera is turned on when the power switch 91 is turned on, and turned off when the power switch 91 is turned off.
- the power supply to most circuits except for the clock circuit for realizing the clock function by the clock 335 and the CPU331 is cut off, and of course shooting is prohibited.
- the camera also has an auto power-off function. If no operation is performed for a certain period of time while the power is on, the camera automatically turns off to reduce power consumption. If any operation (for example, half-press operation) is performed in the auto power-off state, the power-on state is restored.
- the CPU 331, the clock 335, the operation unit 334, the operation detection circuit 310, and the switch control circuit 312 always receive power from the battery BT regardless of the operation state of the power switch 91. Have been supplied. This state is the same as the power-off state when the power switch 91 is turned off by the power switch 91. In the power-on state, power is supplied to other circuits via the switch 313 in addition to the CPU 331, the clock 335, the operation unit 334, the operation detection circuit 310, and the switch control circuit 312.
- the clock 335 measures the time during which no operation is continued by the operation unit 334, and when the measured time exceeds a predetermined time, the switch control circuit 312 of the CPU 331 The switch 313 is opened to cut off the power supply to the other circuits.
- the operation of other circuits may be set to a standby state (sleep state) via a control input terminal that controls the operation state of the other circuits while continuing to supply power to the other circuits. Power consumption can also be reduced by performing such control.
- the operation detection circuit 310 operates the operation member of the operation unit 334.
- the switch control circuit 312 closes the switch 313 and supplies power to the other circuits.
- the operation of other circuits may be changed from a standby state (sleep state) to an active state by power input to the control input terminal.
- the camera starts imaging when the power is turned on, and sequentially updates and displays images repeatedly captured on the display device 100 (through image display). This makes it possible to use the display device 100 instead of a viewfinder.
- an image is captured for recording on the memory card MC, and the captured image is displayed on the display device 100 for a predetermined time (freeze image display).
- playback image display it is also possible to read an image recorded on the memory card MC and display it on the display device 100 (playback image display).
- playback image display in addition to single image display, it is possible to display multiple images as thumbnails on one screen.
- the through image display, freeze image display, and playback image display are performed in the display form described in FIG. 5 of the first embodiment.
- the display mode described with reference to FIG. 7 of the first embodiment can be used.
- menus such as custom settings, and various settings can be made while viewing the display.
- the color display is suitable for improving the visibility, so the display form shown in Fig. 5 is usually used.
- the system shown in Figs. 6 and 7 may be used when the remaining amount of the battery is low.
- the battery check function to automatically switch from the display form of FIG. 5 to the display form of FIG. 6 or 7 when the remaining battery charge falls below a predetermined value.
- the display form may be switched by a user operation.
- the character display module 20 is used so that the display can be continued without power consumption except when the display is updated. Display according to the screen No. 20.
- the CPU 331 automatically switches to the display mode shown in FIG. 6 when the power switch 91 is turned off or when the auto power off waiting time expires, displays the preset display content, and then turns off the power. To do. According to this, information that could not be confirmed without turning on the power in the past can be confirmed even when the power is off, which improves the usability of the power camera.
- FIG. 19 shows an example in which the current date and time are displayed by the character display module 20 when the power is turned off. Since the watch 335 is operating even when the power is off, the time can be displayed based on the information from the watch 335. In the case of hour / minute display as shown in the figure, since the display is updated once a minute, the power required to supply power to the character display module 20 when the display is updated. Very little power is required for display. In this example, a text indicating that the power is off is displayed at the bottom of the screen. Users tend to misunderstand the fact that the date is displayed on the screen, but it is easy to misunderstand that the power is turned on. For example, a display such as “Turn on the camera to shoot” may be displayed.
- FIG. 20 shows an example in which the shooting history is displayed by the character display module 20 when the power is turned off.
- the history information the file name of the image file generated and recorded by shooting, the shooting date, and the shooting time are displayed in a table format. The latest several of the multiple image files are displayed. The display may be such that newer files are higher. Since the history information does not change until the next picture is taken, the power consumption and power consumption are virtually zero.
- the pictograph at the bottom right of the screen prompts to turn on the power (indicating that the power is currently off).
- FIG. 21 shows an example in which the photographing condition and the remaining battery level set when the power is turned off are displayed by the character display module 20.
- the current image quality mode, shooting mode, speedlight information, metering mode, number of frames that can be shot, etc. are displayed as characters or pictures as shooting conditions.
- FIG. 22 shows an example in which various menus of the camera are displayed by the character display module 20 when the power is turned off.
- the menu includes a playback menu related to image playback, an image editing menu related to image editing, and a Help menu. Either of the menus that should be selected by the user in advance may be displayed, or a plurality of items may be displayed as shown in the figure so that the user can select them. In addition, schedule information previously entered by the user may be displayed. These displays require no power except when changing the display or scrolling.
- Figs. 23 and 24 show an example of displaying an image already taken with the character display module 20 when the power is turned off.
- Fig. 23 shows an example in which one image is displayed
- Fig. 24 shows an example in which four images are displayed as thumbnails. Each is shown. In either case, displaying the latest captured image is convenient because it allows you to know the previous shooting content and shooting location without turning on the power.
- the character display module 20 is a monochrome display and is not suitable for image display because of poor gradation expression, but there is no particular problem because it is only necessary to confirm what is shown.
- the camera can have an electronic book function (electronic book viewing mode). If the electronic book viewing mode is set by operating the operation unit 334, the contents of the electronic book can be introduced using the memory card MC.
- the electronic book may be used regardless of whether the power is on or off. However, if the power is turned off, for example, a zoom up / down button can be used as a page forward / back button.
- the zoom up Z down button Power is supplied to the character display module 20 only when it is operated and the display by the character display module 20 is updated. Note that when the electronic book viewing mode is set and display of the electronic book content is instructed, the display may be automatically switched to the display by the character display module 20 regardless of the state of the power switch 91. ,. Such a configuration can also reduce the power consumption of the apparatus.
- the camera has all of the display functions shown in FIGS. 19 to 25 and allows the user to set in advance which to display. Regardless of which display is selected, if there is room in the display space, it is desirable to clearly indicate that the power is off, as shown in Fig. 19 and Fig. 20. It may have at least one display function.
- the mobile phone shown in FIG. 26 has a display device 100B on the back side in addition to the main display device 100A, both of which are the two-layer display devices described in FIGS. 1 to 3 of the first embodiment. It is said. That is, the display devices 100A and 100B are composed of an image display module (first display module) 10 and a character display module (second display module) 20 as in the first embodiment. Note that either one may be a two-layer type.
- FIG. 27 is a block diagram showing a control system of the mobile phone.
- the CPU 101 which is a control means (circuit) that controls the overall operation of the cellular phone, includes the display devices 100A and 100B, the memory 102, the external interface (I / F) 108, the battery 109, and the communication control unit 110.
- the clock 111 and the operation unit 112 are connected.
- the operation member 112 includes a dial button of the telephone and sends an operation signal corresponding to the pressed button to the CPU 101.
- the communication control unit 110 includes an antenna 110A and a wireless transmission / reception circuit, and performs voice communication with other telephones via a base station (not shown) according to a command from the CPU 101. In addition to telephone audio, image data shot using the camera function Data can be transmitted and received.
- Reference numeral 105 denotes a detachable memory card, and the CPU 101 can record or read image data or the like on the memory card 105.
- the external interface 108 transmits / receives data to / from an external device via a cable or cradle (not shown) according to a command from the CPU 101.
- Power is always supplied from the battery 109 to the CPU 101, the clock 111, the operation unit 112, the operation detection circuit 101A, and the switch control circuit 101B. At times other than standby, power is supplied to other circuits via the switch 120 in addition to the CPU 101, the clock 111, the operation unit 112, the operation detection circuit 101A, and the switch control circuit 101B.
- the clock 111 measures the time during which no operation is continued by the operation unit 112, and when the measured time exceeds a predetermined time, the switch control circuit 101B of the CPU 101 The switch 120 is opened to cut off the power supply to the other circuits.
- the image display module 10 In normal use, the image display module 10 is used, and various displays are performed in the display form of FIG. 5 described in the first embodiment.
- the display content includes an online service mode, web content (home page, image, video), mail operation screen, and those with shooting functions. There are still images, moving images taken, still images transmitted from the mobile phone of the communication partner, moving images, character data, and the like.
- full color display is possible, and screen switching and scrolling can be performed at high speed.
- the mobile phone when a state in which no operation is performed continues for a predetermined time, the mobile phone automatically enters a standby state under the control of the CPU 101 S, and the display control means CPU 101 is in this standby state. 6 is switched to the display form shown in FIG. 6 and the display content set in advance is displayed on the character display module 20. As described above, according to the display form of FIG. If any operation is performed in the standby state, the display mode of Fig. 5 is automatically restored.
- FIG. 26 (a) shows an example in which a schedule input in advance is displayed in addition to the date and time display as the display content at the time of standby.
- the schedule display needs to be updated (raised) as time elapses, but this may be, for example, once every hour or every 30 minutes.
- watch 111 is always powered
- the character display module 20 is powered only when the display is changed about once every 30 minutes or one hour.
- FIG. 26 (c) shows an example in which the date and the news of the day are displayed on the display device 100B on the back when waiting. This can be achieved by accessing the news site using the online service mode and downloading and displaying the latest information. By downloading and updating the display automatically every few hours, you can always check the latest news in the standby state. You can allow the user to set the update interval.
- the standby state in order to download online service information, power is supplied to the communication control unit 110 every several hours, and the information content downloaded in synchronization with this is displayed on the display device 100B. Supply power to display updated on Module 20.
- the online service mode if the standby state is maintained even when a specific operation member is operated, the latest information download and character display module 20 can be used when the user desires the operation of the specific operation member. Can be updated with low power consumption.
- the online service mode when the online service mode is set and the display of online service content is instructed, it may be configured to automatically switch to the display by the character display module 20 regardless of whether it is in a standby state. Good. Such a configuration can also reduce the power consumption of the apparatus.
- the character display module 20 cannot confirm the display in the dark where it is difficult to see the surroundings. Therefore, it is not possible to display the character display module 20 in the time zone where the surroundings are considered to be long, and it is possible to allow all displays to be performed by the image display module 10 (in the display form of FIG. 5). Since this time period varies depending on the user's lifestyle, it is desirable to allow the user to set the time period in advance. For example, if you enter midnight 0:00 to 5:00, the character display module 20 will not be able to display during that time period, and the image display module 10 will be able to display it. Les.
- the display module 20 or the display module 20 is allowed to display with the display module 20 as the default setting. You may do it. According to the second and third embodiments described above, the following effects can be obtained.
- the display in the first display form is permitted by the image display module 10, and when the power is turned off, the display in the first display form is not allowed and the second display by the character display module 20 is performed. Since the display in the form is permitted, a highly visible display is made by a light emitting display when the power is turned on, and a display with low power consumption using outside light is possible when the power is turned off. This display when the power is turned off makes it possible to confirm information that could not be confirmed when the power was not turned on, even when the power is turned off.
- the display form by the display device is switched between the first display form by the image display module 10 and the second display form by the character display module 20 according to the operation mode, the operation is performed while considering power saving.
- a display suitable for the mode can be realized.
- the display form by the display device is switched between the first display form by the image display module 10 and the second display form by the character display module 20 in accordance with the display content displayed on the display device, it is saved. It is possible to realize a display suitable for display content while considering power.
- Display in the second display form by the character display module 20 is prohibited in the preset time zone and display in the first display form in the image display module 10 is allowed, and in the other time zones, the first display form is allowed. Because the display in the second display form is permitted, the first display form by the image display module 10 is in a period when the display is dark and the display by the second display form by the character display module 20 is difficult to see. (Light emission display) for clear display Visible to.
- the display device shown in FIG. 28 uses an organic EL module 50 as an image display module instead of the liquid crystal module described above.
- the organic EL module 50 includes a drive substrate 51, a light emitting layer 52 made of a plurality of organic EL elements arranged in a matrix on the substrate 51, a glass plate 53 covering the light emitting layer 52, Consists of the color filter shown. Display data and the like are transmitted by, for example, the flexible printed circuit board 152. Since the device itself emits light, a backlight is unnecessary, and it can be made thinner than a liquid crystal module.
- the amount of light emitted can be controlled for each pixel by controlling the amount of light emitted for each element, and since a color filter is provided, it is suitable for full-color display of images and movies as with a liquid crystal module.
- RU since the pixel is blackened if it does not emit light, the light transmitted through the transmission area of the character display module 20 can be absorbed and the area can be made black. Therefore, the same usage as in the previous embodiment is possible. You can use inorganic EL elements.
- FIG. 29 shows an example in which one glass substrate is used as both an image display module and a character display module. That is, the glass substrate 61 shown in the drawing serves as both the upper glass substrate of the image display module (liquid crystal module) and the lower glass substrate of the character display module. A transparent electrode portion for the image display module is formed on the lower surface side of the glass substrate 61, and a transparent electrode portion for the character display module is formed on the upper surface side. In this case, the upper polarizing plate 13 of the image display module is disposed on the upper surface of the character display module. Further, FIG. 30 shows an example in which the glass substrate on the upper side of the image display module (organic EL module) and the glass substrate on the lower side of the character display module are shared by a single glass substrate 62.
- the glass substrate on the upper side of the image display module organic EL module
- the glass substrate on the lower side of the character display module are shared by a single glass substrate 62.
- PN liquid crystal which shows an example using cholesteric liquid crystal as a display element of the character display module
- PN liquid crystal is also transmissive for each pixel / Since the display is performed by setting the reflection state, it can be used in the same way as described above. However, since there is no memory, it is necessary to keep energizing to maintain the display. It does not involve light emission, so it consumes very little power, and it saves power compared to the case where an image display module covers all displays. Contribute to.
- the yellow display described in the cholesteric liquid crystal can be turned into a white display (white letters or white background), and higher contrast can be realized.
- PDAs digital cameras
- cellular phones are shown as electronic devices (electronic devices), but other electronic devices such as various portable devices including electronic books, or mopile personal computers
- electronic devices electronic devices
- other electronic devices such as various portable devices including electronic books, or mopile personal computers
- the present invention can also be applied to the above.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US11/666,623 US8106852B2 (en) | 2004-11-04 | 2005-10-28 | Display device and electronic device |
EP05805366A EP1826739A4 (en) | 2004-11-04 | 2005-10-28 | DISPLAY DEVICE AND ELECTRONIC DEVICE |
Applications Claiming Priority (6)
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JP2004320096A JP2006133346A (ja) | 2004-11-04 | 2004-11-04 | 表示装置 |
JP2004-320096 | 2004-11-04 | ||
JP2005-017882 | 2005-01-26 | ||
JP2005017882A JP2006208536A (ja) | 2005-01-26 | 2005-01-26 | 表示装置付き電子機器 |
JP2005058593A JP4232749B2 (ja) | 2005-03-03 | 2005-03-03 | 表示装置 |
JP2005-058593 | 2005-03-03 |
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PCT/JP2005/019922 WO2006049105A1 (ja) | 2004-11-04 | 2005-10-28 | 表示装置および電子装置 |
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US (1) | US8106852B2 (ja) |
EP (1) | EP1826739A4 (ja) |
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Also Published As
Publication number | Publication date |
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US20080007486A1 (en) | 2008-01-10 |
US8106852B2 (en) | 2012-01-31 |
EP1826739A4 (en) | 2010-10-20 |
EP1826739A1 (en) | 2007-08-29 |
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