CN201465142U - Induction type optical fingerprint collecting device - Google Patents
Induction type optical fingerprint collecting device Download PDFInfo
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- CN201465142U CN201465142U CN2009200816902U CN200920081690U CN201465142U CN 201465142 U CN201465142 U CN 201465142U CN 2009200816902 U CN2009200816902 U CN 2009200816902U CN 200920081690 U CN200920081690 U CN 200920081690U CN 201465142 U CN201465142 U CN 201465142U
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- finger print
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- optical finger
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Abstract
The utility model provides an induction type optical fingerprint collecting device which comprises a fingerprint collecting module and a capacitance type proximity sensor. The capacitance type proximity sensor is composed of an inductive electrode and an inductive measuring circuit. The inductive electrode is arranged below a collecting prism. The capacitance type proximity sensor is additionally arranged in the traditional optical fingerprint collecting device, which simplifies the software and hardware designs of an image processing module and reduces power consumption of a system. With strong penetrating and interference resisting capabilities, the inductive electrode of the capacitance type proximity sensor does not need to be in direct contact with fingers, which solves the problem that the inductive electrode can be easily penetrated and damaged if being exposed outside, improves the inductive accuracy of the fingerprint collecting device and prolongs the service life of the fingerprint collecting device.
Description
Technical field
The utility model relates to optical finger print and gathers the field, relates in particular to a kind of optical finger print harvester that can the finger sensing contact.
Background technology
Fingerprint acquisition device is the input media of fingerprint recognition system, can be widely used in Fingerprint Lock, attendance checking system, ecommerce, bank savings, social insurance, PC and the mobile phone, also can be used for the public security system fingerprint comparison and gathers operation.
Optical fingerprint sensor is a widely used fingerprint acquisition device in the existing fingerprint recognition system, and the fingerprint imaging that it can will be pointed by optical sensor is delivered to main frame with fingerprint image then and handles.
Because the optical finger print harvester needs preparation for acquiring and comparison fingerprint anywhere or anytime, if the optical finger print harvester is finger sensing automatically, then harvester will be in the energising duty for a long time, continuous images acquired is also done the collection face that a large amount of Flame Image Process work judges whether finger contact Collection prism, make the software and hardware for the treatment of apparatus complicated, speed slows down, power consumption increases, therefore need make its inner control circuit when having only the finger contact, just start working, not work when having the finger contact or be in dormant state.There is part to adopt mechanical switch to trigger in the existing optical finger print harvester, also has the part fingerprint acquisition device to adopt infrared inductor or electrostatic induction circle to survey finger position and trigger fingerprint collecting.These three kinds of schemes or use are inconvenient, and perhaps power consumption is big, poor anti jamming capability.
In patent CN2669279Y, used inductive probe to answer live body finger, but this patent is arranged at inductive probe around the collection face of prism of optical finger print harvester, touches inductive probe in the time of finger contact collection face from innervation.Because outside being exposed to, probe is breakdown easily to be caused damaging, and be vulnerable to other objects interference of extraneous non-finger.
Capacitive proximity sensor utilizes capacitance induction principle, its induction pole plate is the plate electrode that conductive material is made, can be regarded as one or one group of electric capacity, near the appearance or the electric conductor of process and the specific inductive capacity in the dielectric change pad system, influence distribution of electrostatic, thereby change the electric capacity of induction pole plate.When pointing close or contact induction pole plate, the induction plates capacitance increases; When finger away from or leave induction during pole plate, the induction plates capacitance will reduce.The measurement of inductance circuit is used to measure the capacitance variations of induction pole plate, thereby judges the existence whether finger is arranged.The anti-medium interference performance of this capacitive proximity sensor is strong: even the glass medium panel is spattered with water by water, also can not influence the identification finger and come close to or in contact with signal; Penetrating force is strong: across certain thickness glass medium, still can accurately discern finger and come close to or in contact with signal between induction electrode and the human finger.
The utility model content
In order to solve above-mentioned technical matters, a kind of induction type optical finger print harvester is provided, in the optical finger print harvester, increase capacitive proximity sensor, and the capacitive proximity sensor induction electrode is placed on the Collection prism below, avoid contacting with pointing directly, improve accuracy of sensors, prolonged the serviceable life of harvester.
The utility model provides a kind of induction type optical finger print harvester, it comprises finger print acquisition module and capacitive proximity sensor, capacitive proximity sensor comprises induction electrode and measurement of inductance circuit, it is characterized in that, induction electrode places the Collection prism below.
Described finger print acquisition module comprises: shell, Collection prism, light source, lens combination, semiconductor transducer imaging array, the output signal of semiconductor transducer imaging array is connected with main frame.
When finger print acquisition module uses area source, and area source is when being positioned at the Collection prism below, and described induction electrode places the area source below; When finger print acquisition module used pointolite, described induction electrode placed the Collection prism below.
Described measurement of inductance circuit is connected with described induction electrode, and the output signal of measurement of inductance circuit is connected with main frame.
The plane of incidence of described light source and Collection prism joins; The lens combination center overlaps with light path light axis.
Described induction electrode is the plate electrode that conductive material is made.
Described light source is connected with main frame.
Described semiconductor transducer imaging array is cmos sensor or ccd sensor.
The utility model provides a kind of induction type optical finger print harvester, increases capacitive proximity sensor in original optical finger print harvester, has simplified the design of hardware and software of image processing module, reduces system power dissipation.Because the induction electrode penetrative quality and the antijamming capability of this sensor are strong, can directly not contact with finger, solved induction electrode and be exposed to the outer breakdown easily problem of damaging of causing, the induction accuracy that has improved fingerprint acquisition device prolonged serviceable life.
Description of drawings
Fig. 1 is the utility model embodiment one structural representation;
Fig. 2 is the utility model embodiment two structural representations;
Fig. 3 is that the utility model circuit connects intention;
Fig. 4 is a capacitive proximity sensor practical circuit schematic diagram.
Embodiment
Come in conjunction with the accompanying drawings the utility model is further described below by embodiment:
Embodiment one:
Induction type optical finger print harvester when as shown in Figure 1, present embodiment provides luminous plaque as area source.
This device is made up of finger print acquisition module 1 and capacitive proximity sensor 2.Finger print acquisition module 1 comprises: shell 11, Collection prism 12, luminous plaque 13, lens combination 14, semiconductor transducer imaging array 15; Capacitive proximity sensor 2 comprises induction electrode 21 and measurement of inductance circuit 22.
As shown in Figure 3, when finger comes close to or in contact with Collection prism collection face, changed induction electrode 21 distribution of electrostatic on every side, thereby changed the electric capacity of induction electrode 21, measurement of inductance circuit 22 detects the signal of this capacitance variations, and this signal is transferred to main frame, main frame sends signal makes this induction type optical finger print harvester in running order; Do not come close to or in contact with Collection prism if there is finger, then this induction type optical finger print harvester is in off working state.
As shown in Figure 4, the chip of capacitive proximity sensor 2 can be bought the TTP223 model, comprises induction electrode 21 and measurement of inductance circuit 22.These capacitive proximity sensor 2 sensitivity can realize by the value of control capacittance Cs: the Cs value is more little, and sensitivity is good more.The chip pin Q of measurement of inductance circuit 22 is a signal output part, is connected with main frame.
Embodiment two:
Induction type optical finger print harvester when as shown in Figure 2, present embodiment provides light emitting diode to do pointolite.
This device is made up of finger print acquisition module 1 and capacitive proximity sensor 2. and finger print acquisition module 1 comprises: shell 11, Collection prism 12, electric light source 13, lens combination 14, semiconductor transducer imaging array 15; Capacitive proximity sensor 2 comprises induction electrode 21 and measurement of inductance circuit 22.
As shown in Figure 3, when finger comes close to or in contact with Collection prism collection face, changed induction electrode 21 distribution of electrostatic on every side, thereby changed the electric capacity of induction electrode 21, measurement of inductance circuit 22 detects the signal of this capacitance variations, and this signal is transferred to main frame, main frame sends signal makes this induction type optical finger print harvester in running order; Do not come close to or in contact with Collection prism if there is finger, then this induction type optical finger print harvester is in off working state.
As shown in Figure 4, the chip of capacitive proximity sensor 2 can be bought the TTP223 model, comprises induction electrode 21 and measurement of inductance circuit 22.These capacitive proximity sensor 2 sensitivity can realize by the value of control capacittance Cs: the Cs value is more little, and sensitivity is good more.The chip pin Q of measurement of inductance circuit 22 is a signal output part, is connected with main frame.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite spirit and scope of the present utility model of claims.Therefore scope of the present utility model is not limited in above explanation, but determine by the scope of claims.
Claims (9)
1. induction type optical finger print harvester, it comprises finger print acquisition module and capacitive proximity sensor, and capacitive proximity sensor comprises induction electrode and measurement of inductance circuit, it is characterized in that, and induction electrode places the Collection prism below.
2. induction type optical finger print harvester according to claim 1, it is characterized in that described finger print acquisition module comprises: shell, Collection prism, light source, lens combination, semiconductor transducer imaging array, the output signal of semiconductor transducer imaging array is connected with main frame.
3. induction type optical finger print harvester according to claim 1 is characterized in that described measurement of inductance circuit, is connected with described induction electrode, and the output signal of measurement of inductance circuit is connected with main frame.
4. induction type optical finger print harvester as claimed in claim 1 or 2 is characterized in that described light source is an area source, and area source is positioned at the Collection prism below; Described induction electrode places the area source below.
5. induction type optical finger print harvester as claimed in claim 1 or 2 is characterized in that described light source is a pointolite; Described induction electrode places the Collection prism below.
6. as induction type optical finger print harvester as described in the claim 2, it is characterized in that the plane of incidence of light source and Collection prism joins; The lens combination center overlaps with light path light axis.
7. the described induction type optical finger print of claim 2 harvester is characterized in that, light source is connected with main frame.
8. induction type optical finger print harvester according to claim 1 is characterized in that described induction electrode is the plate electrode that conductive material is made.
9. as induction type optical finger print harvester as described in the claim 2, it is characterized in that the semiconductor transducer imaging array is cmos sensor or ccd sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200816902U CN201465142U (en) | 2009-06-11 | 2009-06-11 | Induction type optical fingerprint collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200816902U CN201465142U (en) | 2009-06-11 | 2009-06-11 | Induction type optical fingerprint collecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201465142U true CN201465142U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200816902U Expired - Fee Related CN201465142U (en) | 2009-06-11 | 2009-06-11 | Induction type optical fingerprint collecting device |
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| CN (1) | CN201465142U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950360A (en) * | 2010-09-07 | 2011-01-19 | 成都方程式电子有限公司 | Optical fingerprint identifier capable of identifying living body finger |
| CN102004903A (en) * | 2010-11-17 | 2011-04-06 | 深圳市中控生物识别技术有限公司 | Anti-counterfeiting fingerprint identification device and fingerprint identification method |
| CN102750520A (en) * | 2012-06-05 | 2012-10-24 | 东莞市中控电子技术有限公司 | Capacitive fingerprint detection device |
| WO2014059763A1 (en) * | 2012-10-15 | 2014-04-24 | Min Yu | Fingerprint triangular prism structure having attached metal sheet |
| US20150206148A1 (en) * | 2012-07-26 | 2015-07-23 | Peter Cherry | System and method for fraud prevention |
| CN105260728A (en) * | 2015-11-13 | 2016-01-20 | 杭州指安科技股份有限公司 | Uniform sensing structure of fingerprint reading surface of fingerprint reader |
| CN105303165A (en) * | 2015-09-29 | 2016-02-03 | 上海众享电子科技有限公司 | Capacitance optical fingerprint acquisition instrument |
| CN105335694A (en) * | 2014-08-05 | 2016-02-17 | Lg伊诺特有限公司 | Fingerprint sensor and touch device including the same |
| WO2018058694A1 (en) * | 2016-10-01 | 2018-04-05 | 深圳市汇顶科技股份有限公司 | Fingerprint capture device |
| CN108399351A (en) * | 2017-02-04 | 2018-08-14 | 上海箩箕技术有限公司 | Fingerprint imaging module and electronic equipment |
-
2009
- 2009-06-11 CN CN2009200816902U patent/CN201465142U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950360A (en) * | 2010-09-07 | 2011-01-19 | 成都方程式电子有限公司 | Optical fingerprint identifier capable of identifying living body finger |
| CN102004903A (en) * | 2010-11-17 | 2011-04-06 | 深圳市中控生物识别技术有限公司 | Anti-counterfeiting fingerprint identification device and fingerprint identification method |
| CN102004903B (en) * | 2010-11-17 | 2013-07-10 | 深圳市中控生物识别技术有限公司 | Anti-counterfeiting fingerprint identification device and fingerprint identification method |
| CN102750520A (en) * | 2012-06-05 | 2012-10-24 | 东莞市中控电子技术有限公司 | Capacitive fingerprint detection device |
| US10586232B2 (en) * | 2012-07-26 | 2020-03-10 | Peter Cherry | Prevention of unauthorized usage of personal device and system with biometric sensor |
| US20150206148A1 (en) * | 2012-07-26 | 2015-07-23 | Peter Cherry | System and method for fraud prevention |
| WO2014059763A1 (en) * | 2012-10-15 | 2014-04-24 | Min Yu | Fingerprint triangular prism structure having attached metal sheet |
| CN105335694A (en) * | 2014-08-05 | 2016-02-17 | Lg伊诺特有限公司 | Fingerprint sensor and touch device including the same |
| CN105335694B (en) * | 2014-08-05 | 2020-12-22 | Lg伊诺特有限公司 | Fingerprint sensor and touch device comprising same |
| CN105303165A (en) * | 2015-09-29 | 2016-02-03 | 上海众享电子科技有限公司 | Capacitance optical fingerprint acquisition instrument |
| CN105260728A (en) * | 2015-11-13 | 2016-01-20 | 杭州指安科技股份有限公司 | Uniform sensing structure of fingerprint reading surface of fingerprint reader |
| US10621403B2 (en) | 2016-10-01 | 2020-04-14 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint capturing device |
| WO2018058694A1 (en) * | 2016-10-01 | 2018-04-05 | 深圳市汇顶科技股份有限公司 | Fingerprint capture device |
| CN108399351A (en) * | 2017-02-04 | 2018-08-14 | 上海箩箕技术有限公司 | Fingerprint imaging module and electronic equipment |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20180611 |
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| CF01 | Termination of patent right due to non-payment of annual fee |