CN102670241A - Active biological characteristic sensor and electronic equipment using same - Google Patents
Active biological characteristic sensor and electronic equipment using same Download PDFInfo
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- CN102670241A CN102670241A CN2011100645953A CN201110064595A CN102670241A CN 102670241 A CN102670241 A CN 102670241A CN 2011100645953 A CN2011100645953 A CN 2011100645953A CN 201110064595 A CN201110064595 A CN 201110064595A CN 102670241 A CN102670241 A CN 102670241A
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Abstract
The invention discloses an active biological characteristic sensor. The active biological characteristic sensor comprises a first carrier, a fixed first electrode, a suspension second electrode, a supporting structure and a driving signal generator. The first electrode is arranged on the first carrier. The second electrode faces the first electrode. The supporting structure separates the first electrode from the second electrode so that the first electrode and the second electrode form an accommodating space. The driving signal generator outputs a driving signal to the first electrode or the second electrode so that the second electrode generates a first vibration wave. The first vibration wave is interfered by a biological characteristic and changes into a second vibration wave. The invention also discloses electronic equipment using the active biological characteristic sensor. The active biological characteristic sensor and the electronic equipment using the same are low in power consumption, small in size, can effectively sense surface and hypodermic biological characteristics, and are not greatly influenced by distance.
Description
Technical field
The present invention relates to a kind of active (active) biological characteristic sensor and use its electronic installation, and particularly have and relate to a kind of electronic installation that utilizes active vibration wave to come the sensor of detection of biological characteristic and use it.
Background technology
The method of traditional biological characteristic sensor (being the fingerprint sensor for example) sensing has several kinds; For example optical sensing principle; Its shortcoming is that effectively sensing is done finger and dirty, and needs an illumination optical and imaging system, and not only consumed power is high and bulky.Modal in addition is exactly the semiconductor chip that utilizes electric capacitance measurement, and its advantage is that power consumption is little and volume is little, but shortcoming is can't the wet finger of sensing.The mode of utilizing pressure-sensing is arranged in addition, be characterized in to provide the structure of an easy compressive deformation, but the power of this sensor of finger presses must be enough.If the power of this sensor of finger contact is pressed into this sensor, the sensing result that then can't obtain inadequately or not.Above in addition technology all can't the sensing subcutaneous tissue, as the collection of more bio informations.A kind of in addition method is to utilize the technology of infrared ray sensing veins beneath the skin, can solve above-mentioned measurement shortcoming, but complicated optical system makes its volume, and power consumption and price all are difficult for popularization and application.
For solving above all problems, the present invention will provide an active biological characteristic sensor, reach low-power consumption, volume is little, not only can detect the biological characteristic on surface, and for example fingerprint more possibly detect subcutaneous biological characteristic, for example information such as blood vessel.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of low-power consumption, volume little, and effectively sensitive surface and subcutaneous biological characteristic and active biological characteristic sensor that does not receive apart from significantly influence and the electronic installation that uses it.
For reaching above-mentioned purpose, the present invention provides a kind of active biological characteristic sensor to comprise one first carrier, fixing first electrode, suspension second electrode, a supporting construction and a driving signal generator.First electrode is arranged at first carrier.Second electrode is arranged in the face of first electrode.Supporting construction separates first electrode and second electrode, so that first electrode and second electrode form an accommodation space.Signal generator output one drives signal to the first electrode or second electrode, so that second electrode produces first vibration wave.First vibration wave receives a biological feature interference and is transformed into second vibration wave.
In addition, the present invention also provides a kind of electronic installation that uses aforementioned active biological characteristic sensor.
Through above-mentioned active biological characteristic sensor of the present invention, can reach the initiatively function of sensing, for the fingerprint of pushing the not enough finger of power goodish sensing effect can be arranged still.It should be noted that because the characteristic of active sensing so can increase a dormancy and wake control module up, makes first vibration wave of active detecting need not continue to send.Perhaps, also can increase the electric capacity of a sensing function, with the function of integration active with passive detection with sensing first electrode and second electrode.
The active biological characteristic sensor of the embodiment of the invention and use its electronic installation, low in energy consumption, volume is little, and effectively sensitive surface and subcutaneous biological characteristic and not significantly influenced by distance.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute qualification of the present invention.In the accompanying drawings:
Figure 1A shows the sketch map according to the active biological characteristic sensor of first embodiment of the invention.
Figure 1B shows a kind of combination of second electrode and wall.
Fig. 1 C shows the another kind of combination of second electrode and wall.
Fig. 1 D shows the combination of second carrier and second electrode.
Fig. 2 shows a kind of pattern of the relative motion state of first electrode and second electrode.
Fig. 3 shows the embodiment according to each sensing unit framework of biological characteristic sensor of the present invention.
Fig. 4 and Fig. 5 show the application according to biological characteristic sensor of the present invention.
Drawing reference numeral:
C1: electric capacity
C2: electric capacity
F: finger/biological characteristic
FV: stricture of vagina paddy
FR: stricture of vagina peak
OP: operational amplifier
S1: drive signal
S2: sensing signal
W1: first vibration wave
W2: second vibration wave
1: the biological characteristic sensor
2: notebook computer
3: cursor of mouse
4: mobile phone
5: sensing unit
10: the first carriers
20: the first electrodes
22: display module
23: processing module
30: driving signal generator
40: the second electrodes
41: the second intermediate layer of material
42: display module
43: processing module
45: the three intermediate layer of material
50: supporting construction/wall
51: the three intermediate layer of material
55: accommodation space
60: read circuit
70: the second carriers
The specific embodiment
For letting the foregoing of the present invention can be more obviously understandable, hereinafter is special lifts a preferred embodiment, and cooperates appended graphicly, elaborates as follows.
Figure 1A shows the sketch map according to the active biological characteristic sensor of first embodiment of the invention.Shown in Figure 1A, the active biological characteristic sensor 1 of present embodiment comprises one first carrier 10, fixing first electrode 20, suspend second electrode 40, a supporting construction (or claiming wall) 50 and one driving signal generator 30.
If be provided with transistor and component in first carrier 10, the annealing temperature (anneal temperature) that is provided after then just can only be lower than 500 ℃ environment down the covalent bond of the high key knotting strength of formation between the wall 50 and second electrode 40.
Yet; The wall 50 and second electrode 40 are except above-mentioned direct juncture; Also can be provided with one first intermediate layer of material 51 by each wall 50, and one second intermediate layer of material 41 is set for 40 times, engage the mode of first intermediate layer of material 51 again through second intermediate layer of material 41 at second electrode; Second electrode 40 is fixedly arranged on the wall 50, shown in Figure 1B.Wherein, First intermediate layer of material 51 or second intermediate layer of material 41 can be respectively aluminum and germanium or silicon and gold; For example aluminum and germanium can form eutectic at about 420 ℃ and engage (eutectic bonding); And these two kinds of materials are compatible with the CMOS manufacturing process, are more suitable for being applied in present embodiment and have the design that integrated circuit is integrated.In addition; One the 3rd intermediate layer of material 45 also can only be set between the wall 50 and second electrode 40 to engage; Shown in Fig. 1 C, 45 of this 3rd intermediate layer of material can be glass frit (glass frit), macromolecule gummed layer and other jointing materials or the like.
In another embodiment; Wall 50 is to be made up of metal for example, particularly is made up of gold (Au), or is made up of composite metal structures (the for example composite construction of nickel and gold); Second electrode 40 can also be arranged on one second carrier 70, shown in Fig. 1 D.The combination of second carrier 70 and second electrode 40 for example is a flexible circuit board, and it is reached by formed second electrode 40 of metallic circuit such as 70 of the polymer material layers of pi (polyimide) form.Metallic circuit and polymer material layer can be single or multiple lifts, and the structure and the material that relate to flexible circuit board are known technology, do not give unnecessary details at this.And the joint of flexible circuit board and golden projection is a known technology, does not give unnecessary details at this.
Because this similar is in the combinative structure of first carrier 10 and first electrode 20, so no longer detail and show in this.
In the present invention, biological characteristic is skin surface or its subcutaneous biological characteristic, for example epidermis fingerprint, corium lines or veins beneath the skin lines or the like.And can detect subcutaneous specific biological characteristic in order to reach; Blood vessel lines for example; Possibly operate in specific frequency; To avoid the interference of skin surface, common supersonic frequency can reach this function, and therefore active structure of the present invention also can be used for the sensing of non-contact type and contact-type.In the present embodiment, be that fingerprint (comprising stricture of vagina peak FR and stricture of vagina paddy FV) with finger F is used as biological characteristic explanation.
It should be noted that first electrode 20, second electrode 40 and read circuit 60 and constitute sensing unit 5.In addition; First electrode 20 of each sensing unit 5 of active biological characteristic sensor 1 more can be electrically connected to one and read circuit 60; And read each and the signal between first electrode 20 and second electrode 40 is changed and obtain a sensing signal S2; Sensing signal S2 is a range information for example corresponding to the customizing messages of biological characteristic F and biological characteristic sensor 1.If sensing unit 5 does not receive the stricture of vagina peak and disturbs, then read signal that circuit 60 reads through first electrode 20 should be said be phase place and the amplitude signal identical with the first vibration wave W1; If instead be interfered; Read then that signal that circuit 60 reads through first electrode 20 then has phase place or oscillation amplitude change obtains sensing signal S2; Because the stricture of vagina peak FR of fingerprint is different with the distance of second electrode with stricture of vagina paddy FV; So can produce different interference to the first vibration wave W1, thereby make second vibration wave W2 difference to some extent, thereby obtain the different information of stricture of vagina peak FR with the distance between the stricture of vagina paddy FV.
It should be noted that signal generator also can be electrically connected to first electrode, and control circuit can be electrically connected to second electrode.Fig. 2 shows a kind of pattern of the relative motion state of first electrode and second electrode.As shown in Figure 2, first electrode, 20 relative fixed for example operate under the resonance mode, then second electrode 40 can up-down vibration to produce the first vibration wave W1.
Fig. 3 shows that each the sensing unit according to biological characteristic sensor of the present invention comprises an embodiment of circuit framework.As shown in Figure 3, capacitor C 1 is represented the electric capacity between first electrode 20 and second electrode 40, and capacitor C 2 is a reference capacitance.In the present embodiment, read circuit 60 and comprise an operational amplifier OP, through the connected mode of operational amplifier OP; First electrode 20 is connected in the negative input end of OP, and the positive input terminal of OP then is electrically connected to an earthing potential or a fixed voltage, because the characteristic of OP; Its two input is regarded as isoelectric level; Therefore first electrode 20 also is regarded as earthing potential, and therefore when input one drove signal S1 in second electrode 40, second electrode 40 that the electrostatic force that both meetings produce because of voltage difference will suspend was inhaled toward first electrode 20; Thereby make distance between the two become near, thereby make capacitance C1 become big.Through the conversion of OP and reference capacitance C2, can obtain the S2 signal of a correspondence at the outfan of OP.Therefore, if the S1 of input changes the fixed cycle, it also will be the output with the S1 same phase that its S2 of sensing unit that then is not interfered exports, and both amplitude relations are S2=S1*C1/C2.If sensing unit is disturbed, for example hands fingerprint peaks contact, then the C1 value will be disturbed and make the S2 of output change.
Fig. 4 and Fig. 5 show the application according to biological characteristic sensor of the present invention.As shown in Figure 4, biological characteristic sensor 1 can be used in notebook computer 2, for example as finger print input device, perhaps utilizes finger to move moving and relevant keypress function with mouse beacon cursor 3.As shown in Figure 5, biological characteristic sensor 1 can be used in running gear, and for example phone 4, is same as aforesaid function to reach, and the software and the hardware associative operation of control mobile phone 4.Wherein, Biological characteristic sensor 1 as indicator device utilizes the direction that can replace the traditional mechanical operating means to choose and push and choose; Left click, right click, twin shaft scrolling more can be provided, amplify, dwindle, switch, double-click (Double click), and long by presetting functions such as application program above entering after the scheduled time.Certainly except the application of above-mentioned notebook computer 2 and mobile phone 4, biological characteristic sensor 1 of the present invention more can be used in any electronic installation that needs finger print input device or directivity device.Therefore, the present invention more provides a kind of electronic equipment with aforementioned biological characteristic sensor 1, to control the operation of this electronic equipment.
Therefore, electronic installation 2/4 of the present invention comprises a sensing apparatus (biological characteristic sensor) 1, one display module 22/42 and a processing module 23/43.As shown in Figure 4; Sensing apparatus 1 is installed in the notebook computer 2; Processing module 23 (can be central processing unit, CPU) again according to having object (like object 5, being finger at this) variation of the mobile multi-point deformetion that causes on sensing apparatus 1 that surface pattern distributes; Come controlling application program (like moving or man-computer interface of cursor 3), and the control display module 22 corresponding pictures (like the picture of man-computer interface) that show application program.As shown in Figure 5, sensing apparatus 1 is installed in the mobile phone 4, and operates the display module 42 of mobile phone 4 with above-mentioned mode.What is more, should use example, and sensing apparatus 1 can not only be used as the control that cursor 3 moves or the switching of screen-picture or the like function, also pressure-sensing can be provided, even be used as and replace mechanical button and use.In addition, sensing apparatus also can read enough finger lines information and use as biological identification, even the other biological information below the finger skin is to use as medical treatment or biological identification.
Therefore, the present invention more provides a kind of electronic installation, and it comprises aforesaid active biological characteristic sensor 1, a processing module 23/43 and a display module 22/42.Processing module 23/43 is electrically connected to active biological characteristic sensor 1; And reception sensing signal S2; And handle and differentiate the meaning of sensing signal S2 at least one application-specific, an application program is controlled in the variation of for example on active biological characteristic sensor 1, moving the multi-point deformetion that causes according to biological characteristic F.The meaning of at least one application-specific comprises biological characteristic identification or cursor of mouse moves.Display module 22/42 is electrically connected to processing module 23, and shows a picture of corresponding application program.
Through above-mentioned active biological characteristic sensor of the present invention, can reach the initiatively function of sensing, for the fingerprint of pushing the not enough finger of power goodish sensing effect can be arranged still.It should be noted that because the characteristic of active sensing so can increase a dormancy and wake control module up, makes first vibration wave of active detecting need not continue to send.Perhaps, also can increase the electric capacity of a sensing function, with the function of integration active with passive detection with sensing first electrode and second electrode.
The only convenient explanation of the specific embodiment that in the detailed description of preferred embodiment, is proposed technology contents of the present invention; But not with narrow sense of the present invention be limited to the foregoing description; In the situation that does not exceed spirit of the present invention and claim scope; The many variations of being done is implemented, and all belongs to scope of the present invention.
Claims (12)
1. an active biological characteristic sensor is characterized in that, comprises at least:
One first carrier;
One fixing first electrode is arranged at said first carrier;
One suspension, second electrode is arranged in the face of said first electrode;
One supporting construction separates said fixing first electrode and said suspension second electrode, so that said fixing first electrode and said suspension second electrode form an accommodation space; And
One driving signal generator, output one drives signal to said first electrode or said second electrode, so that said suspension second electrode produces first vibration wave, said first vibration wave receives a biological feature interference and is transformed into second vibration wave.
2. active biological characteristic sensor as claimed in claim 1 is characterized in that, more comprises:
One reads circuit, is electrically connected to said first electrode or said second electrode, receives said second vibration wave and obtains a sensing signal, and said sensing signal is corresponding to the customizing messages of said biological characteristic and said biological characteristic sensor.
3. active biological characteristic sensor as claimed in claim 2 is characterized in that, the said circuit that reads reads the signal variation between said first electrode and said second electrode and obtains said sensing signal.
4. active biological characteristic sensor as claimed in claim 3; It is characterized in that; The said circuit that reads comprises an operational amplifier, and said first electrode is connected in a negative input end of said operational amplifier, and a positive input terminal of said operational amplifier is electrically connected to an earthing potential; One outfan of said operational amplifier is electrically connected to the said negative input end of said operational amplifier through a reference capacitance, and the said outfan of said operational amplifier is exported said sensing signal.
5. active biological characteristic sensor as claimed in claim 2 is characterized in that said customizing messages is corresponding to the amplitude variations or the phase change of said sensing signal.
6. active biological characteristic sensor as claimed in claim 2 is characterized in that, the said circuit that reads is exported said driving signal and obtained said sensing signal with the mode of timesharing.
7. active biological characteristic sensor as claimed in claim 1 is characterized in that, more comprises:
One first intermediate layer of material is arranged on the said supporting construction;
One second intermediate layer of material is arranged under said second electrode, and said second intermediate layer of material engages said first intermediate layer of material.
8. active biological characteristic sensor as claimed in claim 1 is characterized in that, is provided with a component in said first carrier.
9. active biological characteristic sensor as claimed in claim 8 is characterized in that, said supporting construction and said second electrode are formed with covalent bond.
10. active biological characteristic sensor as claimed in claim 2; It is characterized in that; Said first electrode, said second electrode and the said circuit that reads constitute sensing unit; And said biological characteristic sensor more comprises N-1 sensing unit, and said N sensing unit lines up an array, and wherein N is the positive integer more than or equal to 2.
11. an electronic installation is characterized in that, comprises at least:
One active biological characteristic sensor comprises at least:
One first carrier;
One fixing first electrode is arranged at said first carrier;
One suspension, second electrode is arranged in the face of said first electrode;
One supporting construction separates said fixing first electrode and said suspension second electrode, so that
Said fixing first electrode and said suspension second electrode form an accommodation space;
One driving signal generator, output one drives signal to said first electrode or said second electrode, so that said suspension second electrode produces first vibration wave, said first vibration wave receives a biological feature interference and is transformed into second vibration wave; And
One reads circuit, is electrically connected to said first electrode or said second electrode, and receives said second vibration wave and obtain a sensing signal, and said sensing signal is corresponding to the customizing messages of said biological characteristic and said biological characteristic sensor;
One processing module is electrically connected to said active biological characteristic sensor, and receives said sensing signal, and handles and differentiate the meaning of said sensing signal at least one application-specific; And
One display module is electrically connected to said processing module, and shows a picture of corresponding said application program.
12. electronic installation as claimed in claim 11 is characterized in that, the meaning of said at least one application-specific comprises biological characteristic identification or cursor of mouse moves.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104063644A (en) * | 2014-06-25 | 2014-09-24 | 深圳市中兴移动通信有限公司 | Fingerprint identifying method, terminal and server |
CN105844273A (en) * | 2014-12-17 | 2016-08-10 | 义隆电子股份有限公司 | Fingerprint Sensing Device |
CN106257485A (en) * | 2015-06-22 | 2016-12-28 | 李美燕 | Integrated vibration wave emission sensing element and sensing array, electronic device and manufacturing method |
TWI581192B (en) * | 2014-12-08 | 2017-05-01 | 麥克思股份有限公司 | Fingerprint identification unit and device |
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CN1619816A (en) * | 2003-11-18 | 2005-05-25 | 三星电子株式会社 | Fingerprint sensor and fabrication method thereof |
CN101727569A (en) * | 2008-10-29 | 2010-06-09 | 神盾股份有限公司 | Planar semiconductor fingerprint sensing device |
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CN1388360A (en) * | 2001-05-25 | 2003-01-01 | 周正三 | Capacitance-type micro pressure-sensing element and its making process and signal reading method |
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CN1619816A (en) * | 2003-11-18 | 2005-05-25 | 三星电子株式会社 | Fingerprint sensor and fabrication method thereof |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104063644A (en) * | 2014-06-25 | 2014-09-24 | 深圳市中兴移动通信有限公司 | Fingerprint identifying method, terminal and server |
CN104063644B (en) * | 2014-06-25 | 2016-03-02 | 深圳市中兴移动通信有限公司 | The method of fingerprint recognition, terminal and server |
TWI581192B (en) * | 2014-12-08 | 2017-05-01 | 麥克思股份有限公司 | Fingerprint identification unit and device |
CN105844273A (en) * | 2014-12-17 | 2016-08-10 | 义隆电子股份有限公司 | Fingerprint Sensing Device |
CN106257485A (en) * | 2015-06-22 | 2016-12-28 | 李美燕 | Integrated vibration wave emission sensing element and sensing array, electronic device and manufacturing method |
CN106257485B (en) * | 2015-06-22 | 2020-01-10 | 李美燕 | Integrated vibration wave emission sensing element and sensing array, electronic device and manufacturing method |
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