CN201681405U - Fingerprint identification system - Google Patents
Fingerprint identification system Download PDFInfo
- Publication number
- CN201681405U CN201681405U CN2010201102777U CN201020110277U CN201681405U CN 201681405 U CN201681405 U CN 201681405U CN 2010201102777 U CN2010201102777 U CN 2010201102777U CN 201020110277 U CN201020110277 U CN 201020110277U CN 201681405 U CN201681405 U CN 201681405U
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- recognition system
- fingerprint recognition
- fingerprint sensor
- fingerprint
- soft
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Abstract
A fingerprint identification system comprises an insulated substrate, a fingerprint sensor and a drive circuit which are positioned on the insulated substrate, an electrostatic discharge transmission unit, and a soft film positioned on the fingerprint sensor, wherein the fingerprint sensor is used for detecting fingerprint information, and the drive circuit is electrically connected with the fingerprint sensor and used for controlling the fingerprint sensor and processing the fingerprint information detected by the fingerprint sensor; the soft film comprises a soft conductive film and a soft insulating film arranged on the soft conductive film, and the soft conductive film is electrically connected with ground end through the electrostatic discharge transmission unit. Static electricity generated during the contact of the finger and the soft insulating film can be transmitted to the ground end through the soft conductive film and the electrostatic discharge transmission unit in turn, thus avoiding the damage to the fingerprint identification system due to the electrostatic discharge.
Description
Technical field
The utility model relates to the semiconductor transducer technical field, relates in particular to a kind of fingerprint recognition system.
Background technology
Along with the development of fingerprint identification technology, fingerprint recognition system is used in daily life more and more, and for example fingerprint identification entrance guard system has the notebook computer of fingerprint recognition etc.
Needs finger contact fingerprint recognition system whether when carrying out fingerprint recognition can be divided into fingerprint recognition system contact and contactless.
In the patent No. is in the Chinese patent of ZL200510063595.6, discloses a kind of contact fingerprint recognition system, with reference to figure 1, shows the synoptic diagram of fingerprint recognition system in the described patent.Described fingerprint recognition system comprises: fingerprint sensor 105, the voltage generator 101 of alternating voltage is provided to fingerprint sensor 105, provide the power suppling part 102 of working power to fingerprint sensor 105, the information of surveying from fingerprint sensor 105 is obtained the control part 104 of fingerprint pattern.During finger contact fingerprint sensor 105, because the conductive characteristic of finger skin, voltage generator 101 can provide the voltage of characteristic frequency to finger surface, fingerprint sensor 105 surveys because the voltage difference that the projection of fingerprint pattern and depression are produced, and with described voltage difference information conveyance to control part 104, described control part 104 obtains fingerprint pattern by the voltage difference information at surface of contact diverse location place, thereby finishes the process of fingerprint recognition.
In described patent, what fingerprint sensor was surveyed is voltage signal.In addition, also have other contact fingerprint recognition system, for example, survey the fingerprint recognition system of electric capacity or contact resistance.But fingerprint recognition system for contact, because finger can carry static, when finger contacts with fingerprint recognition system, be easy to generate static discharge, and the instantaneous power that static discharge produces can be damaged fingerprint sensor, when serious even cause fingerprint sensor to scrap.
The utility model content
The utility model solves provides a kind of fingerprint recognition system, to avoid the problem of fingerprint recognition system static discharge.
For addressing the above problem, the utility model provides a kind of fingerprint recognition system, and described fingerprint recognition system comprises: insulated substrate; Be positioned at fingerprint sensor and driving circuit on the described insulated substrate, described fingerprint sensor is used to survey finger print information, and described driving circuit is electrically connected with described fingerprint sensor, is used to control fingerprint sensor and handle the finger print information that fingerprint sensor detects; The static discharge transmission unit; Be positioned at the flexible film on the described fingerprint sensor, described flexible film comprises soft conductive film and the soft insulation film that is positioned on the soft conductive film, and described soft conductive film is held by described static discharge transmission unit with being electrically connected on.
Optionally, described static discharge transmission unit comprises the conductive layer that is positioned on the insulated substrate, and described soft conductive film is held by described conductive layer with being electrically connected on.
Optionally, described static discharge transmission unit also comprises the impedor that is positioned on the insulated substrate, and described impedor is electrically connected between described conductive layer and the ground end.
Optionally, described static discharge transmission unit comprises flexible printed wiring board that is positioned on the insulated substrate and the conductive layer that is positioned on the described flexible printed wiring board, and described soft conductive film is held by described conductive layer with being electrically connected on.
Optionally, described static discharge transmission unit also comprises the impedor that is positioned on the flexible printed wiring board, and described impedor is electrically connected between described conductive layer and the ground end.
Optionally, described impedor comprises any one or its combination of resistance, electric capacity, inductance.
Optionally, described fingerprint recognition system also comprises metal shell, and described metal shell contains described insulated substrate, fingerprint sensor and driving circuit.
Optionally, described shell comprises opening, and described opening exposes described flexible film.
Optionally, described fingerprint sensor comprises low temperature polycrystalline silicon type fingerprint sensor or amorphous silicon film transistor type fingerprint sensor.
Optionally, described insulated substrate comprises printed circuit board (PCB), glass substrate or flexible substrate.
Optionally, the material of described conductive layer is copper, tin or gold.
Compared with prior art, the utlity model has following advantage: the soft conductive film in the described fingerprint recognition system is held by described static discharge transmission unit with being electrically connected on, when so finger contacts with soft insulation film, static on the finger can be held via soft conductive film, static discharge transmission unit successively with being transferred to, and then prevents the destruction of the strong instantaneous power of static discharge to fingerprint recognition system.
In possibility, described static discharge transmission unit also comprises the impedor that is electrically connected between described conductive layer and the ground end, the instantaneous power that described impedor produces in the time of can reducing the static transmission, thus avoid strong instantaneous power to damage described fingerprint sensor.
Description of drawings
Fig. 1 is the synoptic diagram of prior art fingerprint recognition system;
Fig. 2 is the synoptic diagram of a kind of embodiment of the utility model fingerprint recognition system;
Fig. 3 is the synoptic diagram of a kind of embodiment of the utility model fingerprint recognition system;
Fig. 4 is the synoptic diagram of the another kind of embodiment of the utility model fingerprint recognition system.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can more be become apparent, embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.
Set forth detail in the following description so that fully understand the utility model.But the utility model can be different from alternate manner described here and implements with multiple, and those skilled in the art can do similar popularization under the situation of the utility model intension.Therefore the utility model is not subjected to the restriction of following public embodiment.
In the prior art, when finger contacts with fingerprint recognition system, be easy to generate the static discharge phenomenon, static discharge can produce strong instantaneous power, and described strong instantaneous power can be damaged fingerprint sensor, in the time of seriously even cause fingerprint sensor to scrap.Be provided with the static discharge transmission unit in the fingerprint recognition system of the present utility model, described static discharge transmission unit can be held static with being transferred to, thereby prevents the damage that static discharge produces fingerprint sensor.
Fig. 2 shows the synoptic diagram of a kind of embodiment of the utility model fingerprint recognition system.As shown in Figure 2, shown in fingerprint recognition system comprise insulated substrate 201, be positioned at fingerprint sensor 202 and driving circuit 203 on the described insulated substrate 201, be positioned at the flexible film 204 on the described fingerprint sensor 202, described flexible film 204 comprises soft conductive film and the soft insulation film that is positioned on the soft conductive film, and described soft conductive film holds 206 by static discharge transmission unit 205 with being electrically connected on.
Wherein, described insulated substrate 201 is used for supporting and the fixing electron device of fingerprint recognition system.Described fingerprint sensor 202 is used to survey finger print information, and fingerprint pattern is converted into electric signal.Described driving circuit 203 is electrically connected with described fingerprint sensor 202, is used to control fingerprint sensor 202 and handles the electric signal that fingerprint sensor 202 detects.Described flexible film 204 can be transferred to fingerprint pattern on the fingerprint sensor.Wherein, soft insulation film is used to provide the surface of contact that carries out fingerprint recognition, user's finger presses is to the soft insulation film of described flexible film 204, fingerprint recognition system begins to discern, because described soft conductive film is held via static discharge transmission unit 205 with being electrically connected on, so the static on the finger can hold 206 via soft conductive film, static discharge transmission unit 205 successively with being transferred to.
In addition, described fingerprint recognition system can also comprise metal shell 207, described metal shell 207 contains described insulated substrate 201, fingerprint sensor 202 and driving circuit 203, described metal shell 207 comprises opening, described opening exposes the soft insulation film of described flexible film 204, promptly exposes the surface of contact that carries out fingerprint recognition.When finger touched metal shell 207, static also can be held via described metal shell 207 with being transferred to.
Below in conjunction with specific embodiment, the technical solution of the utility model is described in detail.
Fig. 3 shows the synoptic diagram of a kind of embodiment of the utility model fingerprint recognition system.Be example with the pressure resistance type fingerprint recognition system in the present embodiment.Because fingerprint pattern can produce different pressure to the pressure resistance type fingerprint recognition system, and different pressure can produce different contact resistances, described pressure resistance type fingerprint recognition system is carried out fingerprint recognition by surveying described contact resistance.
Described fingerprint recognition system comprises insulated substrate 201, and described insulated substrate 201 can be printed circuit board (PCB), glass substrate or flexible substrate.
Described fingerprint recognition system also comprises the fingerprint sensor 202 that is positioned on the described insulated substrate, described fingerprint sensor 202 is included in a plurality of probe units of two-dimensional directional array arrangement, each probe unit include contact dull and stereotyped with the described switch that contact dull and stereotyped electrical connection.
Described fingerprint recognition system also comprises the flexible film 204 that is positioned on the described fingerprint sensor 202, described flexible film 204 comprises soft conductive film 2041 and the soft insulation film 2042 that is positioned on the described soft conductive film 2041, wherein said soft conductive film 2041 is covered on the contact flat board, and with contact dull and stereotyped the contact.
Described fingerprint recognition system also comprises driving circuit 203, and described driving circuit 203 comprises the control module that is used to control fingerprint sensor 202 switches, and the module such as sample-and-hold circuit, A/D converter that is used to handle electric signal.
When carrying out fingerprint recognition, finger presses is to flexible film 204, projection in the fingerprint pattern makes soft insulation film 2042 be subjected to different pressure with soft conductive film 2041 with depression, thereby make between soft conductive film 2041 and the contact flat board and produce different contact resistances, driving circuit 203 is opened the switch of fingerprint sensor 202, survey the contact resistance of each position, electric current can produce different electric signal by different contact resistances, described electric signal is passed driving circuit 203 back and is carried out signal Processing, obtains finger print information, thereby finishes fingerprint recognition.
Fingerprint recognition system of the present utility model also comprises static discharge transmission unit 205, and described static discharge transmission unit 205 comprises the conductive layer 2052 that is positioned on the insulated substrate 201.Described conductive layer 2052 is electrically connected with described soft conductive film 2041 and ground end 206 respectively, and the static that the soft insulation film 2041 of finger contact produces can hold 206 by soft conductive film 2041, conductive layer 2052 successively with being transferred to.Need to prove that described conductive layer 2052 all insulate with fingerprint sensor 202, driving circuit 203, therefore, described static discharge transmission unit 205 can not influence the fingerprint recognition process.
Described conductive layer 2052 can be the conductive material of copper, tin or gold etc.For example, can on insulated substrate 201, form copper conductive layer 2052 by electroplating technology.Described conductive layer 2052 can be the conductive film of line style or face type.Usually, the thickness of described conductive layer 2052 is 10～50 μ m.
In a preferred embodiment, static discharge transmission unit 205 also comprises the impedor 2051 that is positioned on the insulated substrate, described impedor 2051 is electrically connected between described conductive layer 2052 and the ground end 206, the static that the soft insulation film 2041 of finger contact produces can hold 206 by soft conductive film 2041, conductive layer 2052 and impedor 2051 successively with being transferred to, the instantaneous power that described impedor 2051 produces in the time of can reducing the static transmission, thus the destruction of instantaneous power reduced to fingerprint recognition system.Described impedor 2051 can be any one or its combination of resistance, electric capacity, inductance.
Fig. 4 shows the synoptic diagram of the another kind of embodiment of the utility model fingerprint recognition system.As shown in Figure 4, in the present embodiment, static discharge transmission unit 205 comprises flexible printed wiring board 2053 that is positioned on the insulated substrate 201 and the conductive layer 2052 that is positioned on the described flexible printed wiring board 2053.Described conductive layer 2052 is electrically connected with described soft conductive film 2041 and ground end 206 respectively.The static that produces on the soft insulation film 2042 can hold 206 by soft conductive film 2041, conductive layer 2052 successively with being transferred to.
Particularly, on flexible printed wiring board 2053, form conductive layer 2052 earlier, described conductive layer 2052 is sticked on flexible printed wiring board 2053, afterwards flexible printed wiring board 2053 is assembled on the insulated substrate, form the static discharge transmission unit.Wherein, described conductive layer 2052 can be the conductive material of copper, tin or gold etc., for example, forms tin matter conductive layer 2052 by tin spray process on flexible printed wiring board.Usually, the thickness of described conductive layer 2052 is 10～50 μ m.
If on insulated substrate, do not form conductive layer, promptly in FEOL, do not form the static discharge transmission unit, can be when back segment to assemble, assembling sticks the flexible printed wiring board of conductive layer, to form the static discharge transmission unit, so present embodiment has better flexibility.
In a preferred embodiment, static discharge transmission unit 205 also comprises the impedor 2051 that is positioned on the flexible printed wiring board, described impedor 2051 is electrically connected between described conductive layer 2052 and the ground end 206, static can hold 206 by soft conductive film 2041, conductive layer 2052 and impedor 2051 successively with being transferred to, with the instantaneous power that reduces to produce when static transmits.
Need to prove that the technical program does not limit the manufacturing process of fingerprint sensor in the fingerprint recognition system, described fingerprint sensor can form by the manufacturing process of traditional silicon base, low temperature polycrystalline silicon or amorphous silicon.In addition, the technical program does not limit the size and the shape of fingerprint sensor yet, and described fingerprint sensor can be the fingerprint sensor of line style or face type.
Need to prove that also the foregoing description is to be example with the pressure resistance type fingerprint recognition system, by the static discharge transmitting device is set, to avoid the destruction of static discharge to fingerprint recognition system in described fingerprint recognition system.In fact, the technical program can also be used for the fingerprint recognition system of other type, for example capacitance type fingerprint recognition system, piezoelectric type fingerprint recognition system etc.Can the static discharge transmitting device be set therein according to the technical program, static is held with being transferred to, avoid because of the electrostatic discharge damage fingerprint recognition system.
In sum, technique scheme is provided with the static discharge transmitting device in fingerprint recognition system, static can be held with being transferred to by described static discharge transmitting device, avoids producing strong immediate current, thereby avoided static discharge that fingerprint recognition system is damaged, improved the yield of product.
Should be appreciated that example herein and embodiment only are exemplary, those skilled in the art can make various modifications and corrigendum under the situation of the spirit and scope of the present utility model that do not deviate from the application and claims and limited.
Claims (11)
1. a fingerprint recognition system is characterized in that, described fingerprint recognition system comprises:
Insulated substrate;
Be positioned at fingerprint sensor and driving circuit on the described insulated substrate, described fingerprint sensor is used to survey finger print information, and described driving circuit is electrically connected with described fingerprint sensor, is used to control fingerprint sensor and handle the finger print information that fingerprint sensor detects;
The static discharge transmission unit;
Be positioned at the flexible film on the described fingerprint sensor, described flexible film comprises soft conductive film and the soft insulation film that is positioned on the soft conductive film, and described soft conductive film is held by described static discharge transmission unit with being electrically connected on.
2. fingerprint recognition system according to claim 1 is characterized in that described static discharge transmission unit comprises the conductive layer that is positioned on the insulated substrate, and described soft conductive film is held by described conductive layer with being electrically connected on.
3. as fingerprint recognition system as described in the claim 2, it is characterized in that described static discharge transmission unit also comprises the impedor that is positioned on the insulated substrate, described impedor is electrically connected between described conductive layer and the ground end.
4. fingerprint recognition system according to claim 1, it is characterized in that, described static discharge transmission unit comprises flexible printed wiring board that is positioned on the insulated substrate and the conductive layer that is positioned on the described flexible printed wiring board, and described soft conductive film is held by described conductive layer with being electrically connected on.
5. as fingerprint recognition system as described in the claim 3, it is characterized in that described static discharge transmission unit also comprises the impedor that is positioned on the flexible printed wiring board, described impedor is electrically connected between described conductive layer and the ground end.
6. as fingerprint recognition system as described in claim 3 or 5, it is characterized in that described impedor comprises any one or its combination of resistance, electric capacity, inductance.
7. fingerprint recognition system according to claim 1 is characterized in that described fingerprint recognition system also comprises metal shell, and described metal shell contains described insulated substrate, fingerprint sensor and driving circuit.
8. fingerprint recognition system as claimed in claim 7 is characterized in that described shell comprises opening, and described opening exposes described flexible film.
9. fingerprint recognition system according to claim 1 is characterized in that described fingerprint sensor comprises low temperature polycrystalline silicon type fingerprint sensor or amorphous silicon film transistor type fingerprint sensor.
10. fingerprint recognition system as claimed in claim 1 is characterized in that described insulated substrate comprises printed circuit board (PCB), glass substrate or flexible substrate.
11., it is characterized in that the material of described conductive layer is copper, tin or gold as claim 2,3,4 or 5 described fingerprint recognition systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201102777U CN201681405U (en) | 2010-02-01 | 2010-02-01 | Fingerprint identification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201102777U CN201681405U (en) | 2010-02-01 | 2010-02-01 | Fingerprint identification system |
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| Publication Number | Publication Date |
|---|---|
| CN201681405U true CN201681405U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201102777U Expired - Fee Related CN201681405U (en) | 2010-02-01 | 2010-02-01 | Fingerprint identification system |
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| Country | Link |
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| CN (1) | CN201681405U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496014A (en) * | 2011-12-06 | 2012-06-13 | 长春方圆光电技术有限责任公司 | Optical fingerprint acquisition system for living body finger identification |
| CN104573631A (en) * | 2014-12-12 | 2015-04-29 | 成都格瑞思文化传播有限公司 | Fingerprint recognition device |
| CN105095871A (en) * | 2015-07-30 | 2015-11-25 | 江苏邦融微电子有限公司 | Anti-interference apparatus based on capacitance induction fingerprint acquisition device, and method thereof |
| CN109327951A (en) * | 2018-09-27 | 2019-02-12 | 惠州Tcl移动通信有限公司 | A kind of fingerprint recognition mould group and mobile terminal |
| TWI771725B (en) * | 2020-02-18 | 2022-07-21 | 神盾股份有限公司 | Fingerprint sensing apparatus |
-
2010
- 2010-02-01 CN CN2010201102777U patent/CN201681405U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496014A (en) * | 2011-12-06 | 2012-06-13 | 长春方圆光电技术有限责任公司 | Optical fingerprint acquisition system for living body finger identification |
| CN102496014B (en) * | 2011-12-06 | 2014-04-02 | 长春方圆光电技术有限责任公司 | Optical fingerprint acquisition system for living body finger identification |
| CN104573631A (en) * | 2014-12-12 | 2015-04-29 | 成都格瑞思文化传播有限公司 | Fingerprint recognition device |
| CN105095871A (en) * | 2015-07-30 | 2015-11-25 | 江苏邦融微电子有限公司 | Anti-interference apparatus based on capacitance induction fingerprint acquisition device, and method thereof |
| CN109327951A (en) * | 2018-09-27 | 2019-02-12 | 惠州Tcl移动通信有限公司 | A kind of fingerprint recognition mould group and mobile terminal |
| TWI771725B (en) * | 2020-02-18 | 2022-07-21 | 神盾股份有限公司 | Fingerprint sensing apparatus |
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Legal Events
| Date | Code | Title | Description |
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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: 20101222 Termination date: 20180201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |