CN103927468B - A kind of fingerprint identification module and display device - Google Patents
A kind of fingerprint identification module and display device Download PDFInfo
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- CN103927468B CN103927468B CN201310754355.5A CN201310754355A CN103927468B CN 103927468 B CN103927468 B CN 103927468B CN 201310754355 A CN201310754355 A CN 201310754355A CN 103927468 B CN103927468 B CN 103927468B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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- Computer Security & Cryptography (AREA)
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The embodiments of the invention provide a kind of fingerprint identification module and display device, to solve the problem of fingerprint identification module integrated level is low, production cost is high in the prior art.The fingerprint identification module includes：Flexible PCB FPC；The fingerprint sensor circuit on the flexible PCB is arranged on, includes the driving electrodes and induction electrode of mutually insulated, wherein, the driving electrodes are extended in a first direction, and the induction electrode extends in a second direction.The display device includes display panel, and the FPC of the display panel for providing electric signal to the display panel, the display device also includes fingerprint identification module.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of fingerprint identification module and display device.
Background technology
In recent years, because the demand to personal information privacy grows to even greater heights, and criminal steals the means of data and also had
Diversified situation occurs, for electronic product used in everyday, such as personal computer（PC）, personal digital assistant
（PDA）Or portable hard disk etc., it is necessary to even if developing electronic product falls into other people hand, remain able to make recorded in it
The technology that is not leaked of personal information information.
It is largely that user keys in letter, digital or its combination is constituted initially as password used in protection, if
Want to improve the security protected, then to increase the length of password；But, user be likely to forget the too long of password of length and
More complicated password, it is very inconvenient during emergency access data.If user is used for multiple different passwords how
A big problem can be turned into by correctly remembering different passwords.In view of the above problems, the protection technique risen at present is biological identification skill
Art, because different biological characteristics can be there are between different bions, and the biological characteristic is difficult to be stolen by other people duplications
Take, such as fingerprint, sound or iris.Therefore using biological feature as the technology for distinguishing identity, such as fingerprint recognition system,
Voiceprint Recognition System and iris authentication system etc., have been increasingly becoming the main flow of emerging protection technique.
With the development of fingerprint identification technology, fingerprint recognition system is increasingly used in daily life, for example, refer to
Line identification gate control system, notebook computer with fingerprint recognition system etc..Wherein, the acquisition method of sweep fingerprint sensor is
Fingerprint is detected by sliding finger on strip sensor surface, because the sweep fingerprint sensor has small volume, low in energy consumption, valency
The advantages of lattice are cheap, is widely used on mobile phone, smart phone, PDA and movable storage device, in the prior art fingerprint sensing
The making of device needs single manufacture craft, and integrated level is not high, and then so that is provided with the making work of the device of fingerprint sensor
Skill is more complicated, and production cost is higher.
The content of the invention
In view of this, the embodiments of the invention provide a kind of fingerprint identification module and display device.
The embodiments of the invention provide a kind of fingerprint identification module, the fingerprint identification module includes：
Flexible PCB FPC；
The fingerprint sensor circuit on the flexible PCB is arranged on, includes the driving electrodes and induced electricity of mutually insulated
Pole, wherein, the driving electrodes are extended in a first direction, and the induction electrode extends in a second direction.
In the fingerprint identification module, the fingerprint sensor circuit includes the driving electrodes that extend in a first direction and along the
The induction electrode of two directions extension；During energization, the induction electrode and driving electrodes form electric capacity in crosspoint, when finger is placed
When on the fingerprint identification module, the electric capacity between the induction electrode and the driving electrodes changes, and passes through detection
The change of the electric capacity, so as to recognize the fingerprint of finger；By setting the driving electrodes that extend in a first direction and in a second direction
The induction electrode of extension so that the test point in fingerprint identification module increases, improves the precision of the fingerprint pattern detected；Together
When, the fingerprint sensor circuit is arranged on flexible PCB, the integrated level of fingerprint identification module is improved, reduces simultaneously
Production cost.
The embodiments of the invention provide a kind of display device, the display device includes display panel, for showing to described
Show that panel provides the FPC of the display panel of electric signal, the display device also includes above-mentioned fingerprint identification module.
Fingerprint identification module is provided with the display device, the fingerprint sensor circuit of the fingerprint identification module includes edge
The driving electrodes of first direction extension and the induction electrode extended in a second direction；During energization, the induction electrode and driving electricity
Pole forms electric capacity in crosspoint, when finger is placed on the fingerprint identification module, the induction electrode and the driving electricity
Electric capacity between pole changes, by detecting the change of the electric capacity, so as to recognize the fingerprint of finger；By setting along first party
To the driving electrodes and the induction electrode that extends in a second direction of extension so that the test point in fingerprint identification module increases, and carries
The precision of the high fingerprint pattern detected；Meanwhile, the fingerprint sensor circuit is arranged on flexible PCB, finger is improved
The integrated level of line identification module, while reducing production cost.
Brief description of the drawings
Fig. 1 is fingerprint identification module schematic diagram provided in an embodiment of the present invention；
Fig. 2 is flexible PCB FPC provided in an embodiment of the present invention, induction electrode, driving electrodes position view；
Fig. 3 is another flexible PCB FPC provided in an embodiment of the present invention, induction electrode, the signal of driving electrodes position
Figure；
Fig. 4 is a kind of sensing sub-electrode provided in an embodiment of the present invention and driving sub-electrode schematic diagram；
Fig. 5 is a kind of sensing sub-electrode provided in an embodiment of the present invention and driving sub-electrode enlarged diagram；
Fig. 6 is fingerprint image provided in an embodiment of the present invention generation and the schematic flow sheet matched.
Embodiment
The embodiments of the invention provide a kind of fingerprint identification module and display device, to solve fingerprint knowledge in the prior art
The problem of other module integrated level is low, production cost is high.
In the prior art, fingerprint recognition system includes fingerprint sensor and drive circuit unit, wherein：Fingerprint sensor is used
In detection fingerprint active user's fingerprint pattern, and active user's fingerprint pattern is converted into the finger print information of electric signal；
Drive circuit unit, including driving chip, for driving the fingerprint sensor, and handle the finger that fingerprint sensor is detected
Line information.
In actual applications, fingerprint sensor is designed as strip under normal circumstances, therefore, in the prior art generally only
Including the induction electrode extended along strip direction, by detecting the change of the electric signal on induction electrode, so as to detect current use
The fingerprint pattern at family.But it is due to that in this scenario, fingerprint sensor can only detect finger on edge on strip direction
Pattern, therefore the resolution ratio of obtained finger pattern is relatively low.
Meanwhile, fingerprint sensor is generally made on printed circuit board (PCB) as independent device, then passes through flexible circuit
Plate is connected to mainboard.Therefore, the making of fingerprint sensor needs single manufacture craft in the prior art, and integrated level is not high, enters
And so that the manufacture craft for the device for being provided with fingerprint sensor is more complicated, production cost is higher.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described.
The embodiment of the present invention one provides a kind of fingerprint identification module 10, as shown in Figure 1；From figure 1 it appears that described
Fingerprint identification module 10 includes：Flexible PCB 11, the fingerprint sensor circuit 12 being arranged on flexible PCB 11 and fingerprint are known
Other chip 13, wherein, the fingerprint sensor circuit 12 includes the induction electrode and driving electrodes of mutually insulated, wherein induction electrode
Including multiple sensing sub-electrodes 1211, driving electrodes include multiple driving sub-electrodes 1221.
Preferably, the induction electrode and driving electrodes are located at the both sides of the FPC respectively；Or, the induction electrode
It is located at the same side of the FPC with driving electrodes.The induction electrode and driving electrodes are arranged on FPC, are conducive to improving
The integrated level of fingerprint identification module, reduces production cost.
Preferably, when the induction electrode and driving electrodes are located at the same side of the FPC, the module also includes position
Insulating barrier between the induction electrode and driving electrodes, for the induction electrode and driving electrodes to be insulated, prevents
Only occurs signal cross-talk between the induction electrode and driving electrodes.
Preferably, the driving electrodes include the driving sub-electrode of multiple mutually insulateds, the driving sub-electrode is strip,
And parallel distribution in the first direction；By the way that the driving electrodes to be set to the driving sub-electrode of multiple mutually insulateds, be conducive to
Improve the accuracy of identification of the fingerprint identification module.
Preferably, the induction electrode includes the sensing sub-electrode of multiple mutually insulateds, the sensing sub-electrode is strip,
And parallel distribution in a second direction；By the way that the induction electrode to be set to the sensing sub-electrode of multiple mutually insulateds, be conducive to
Improve the accuracy of identification of the fingerprint identification module.
Preferably, the driving sub-electrode and inductor electrode crossing are set；By driving sub-electrode and sensing by described
Sub-electrode is arranged in a crossed manner, can increase the number of the electric capacity in the fingerprint identification module, so as to be conducive to improving fingerprint recognition
The accuracy of identification of module.Meanwhile, the driving sub-electrode and sensing sub-electrode can also be arranged in parallel.
Preferably, also including fingerprint recognition chip, the fingerprint recognition chip is located at the side of the FPC, is driven with described
Moving electrode and induction electrode electrical connection, the change for detecting the electric capacity formed by the driving electrodes and induction electrode, and will
Testing result is sent to external circuit by the FPC.
Preferably, the module also includes protective layer, the protective layer covers the induction electrode and driving electrodes, prevented
The internal structure of the fingerprint identification module wrecks.
Specifically：
Referring to Fig. 2, induction electrode 121 is located at the top of the flexible PCB 11, and driving electrodes 122 are located at the flexibility
The lower section of circuit board 11；The driving electrodes 122 are extended in a first direction, and the induction electrode 121 extends in a second direction.
Referring to Fig. 3, the induction electrode 121 and the driving electrodes 122 can also be located at the flexible PCB 11
The same side, it is described when the induction electrode 121 and the driving electrodes 122 are located at the same side of the flexible PCB 11
Also include insulating barrier 30 between induction electrode 121 and the driving electrodes 122, for the induction electrode 121 and driving is electric
Pole 122 is insulated, and prevents signal cross-talk between the induction electrode 121 and driving electrodes 122.
Further, referring to Fig. 4, the induction electrode 121 includes the sensing sub-electrode 1211 of multiple mutually insulateds, described
Sensing sub-electrode 1211 is strip, and parallel distribution in a second direction；The width of the sensing sub-electrode 1211 is 30um-
Spacing between 50um, and the adjacent sensing sub-electrode 1211 of each two is 50um-100um.Due to the fingerprint recognition mould
The volume of block is very small, therefore, in order to heighten in the precision of fingerprint identification module, the embodiment of the present invention one, the inductor electricity
The width of pole 1211 is 30um-50um.Meanwhile, it is described sensing sub-electrode 1211 can also for waveform, zigzag or it is other not
Regular shape.
The driving electrodes 122 include the driving sub-electrode 1221 of multiple mutually insulateds, and the driving sub-electrode 1221 is
Strip, and parallel distribution in the first direction；The width of the driving sub-electrode 1221 is 300um-500um, and each two phase
Spacing between adjacent sensing sub-electrode is 30-50um.Because the volume of the fingerprint identification module is very small, therefore, in order to
Heighten in the precision of fingerprint identification module, the embodiment of the present invention one, the width of the driving sub-electrode 1221 is 300-500um.
Meanwhile, the driving sub-electrode 1221 can also be waveform, zigzag or other irregular shapes.
The width and the sensing sub-electrode 1211 of the specific embodiment of the invention not to the driving sub-electrode 1221
Spacing between width, the adjacent spacing sensed between sub-electrode of each two driving sub-electrode adjacent with each two makees specific
Restriction.
The fingerprint recognition chip 13 is located at the side of the flexible PCB 11, with the driving electrodes 122 and sensing
Electrode 121 is electrically connected, the change for detecting the electric capacity formed by the driving electrodes 122 and induction electrode 121, i.e., examine respectively
The change of the driving electrodes 122 and the power on signal of induction electrode 121 is surveyed, and testing result is sent to outside by the FPC
Circuit.
Fig. 5 is the partial enlarged drawing of fingerprint sensor circuit 12；In Figure 5, the position that 50 expression fingers are touched in figure, first
Direction is laterally, second direction is longitudinal direction, and each horizontal line represents a horizontal array, and each ordinate represents a longitudinal battle array
Row, 1221i-1、1221iWith 1221i+1Three adjacent horizontal arrays of expression, i.e., the driving electrodes of described fingerprint identification module, its
In, i=1,2,3,4......；1211j-1、1211jWith 1211j+1Represent three adjacent longitudinal arrays, i.e., described fingerprint recognition
The induction electrode of module；Wherein, j=1,2,3,4.......Each horizontal array and each longitudinal array intersect respectively,
Form multiple intersection points.For example, horizontal array 1221iWith longitudinal array 1211jIntersecting intersection point is point B (xi, yj)。
When fingerprint recognition chip scanning and horizontal array 1221 is detectedi-1Afterwards, then to 1221iIt is scanned, examines successively
Survey horizontal array 1221iThe actual voltage value of middle output, and compared with the reference voltage level in fingerprint recognition chip.If detection
The actual voltage value arrived is identical with reference voltage level, then it represents that horizontal array 1221iIt is upper that the point touched is not present；If detecting
Actual voltage value differed with reference voltage level, then then represent horizontal array 1221iIt is upper to there is the point touched, now may be used
To determine the ordinate y of touched point.
Now, the fingerprint recognition chip progressively scans each longitudinal array, when scanning through and detected longitudinal array
1211j-1Afterwards, the detection unit then scans longitudinal array 1211j, and detect longitudinal array 1211jThe reality of middle each point output
Magnitude of voltage, if the actual voltage value detected is identical with reference voltage level, then it represents that be not present what is touched on longitudinal array
Point；If the actual voltage value detected is differed with reference voltage level, then it represents that longitudinal array 1211jIt is upper to have what is touched
Point, it is possible to determine the abscissa x of touched point；Horizontal array and longitudinal array are considered, if horizontal array 1221iOn deposit
In the point touched, longitudinal array 1211jOn there is also the point touched, then according to by horizontal array 1221iIt is corresponding vertical
Coordinate y and longitudinal array 1211jCorresponding abscissa x, you can draw the point B touched coordinate be (x, y).
Then, referring to Fig. 6, in finger sliding process, the projection of the lines of finger print will streak the multiple electricity of X-direction
Pole and its clearance space, and then in different fingerprint image segment series, lines projection is by caused capacitance variations, it will body
In the capacitance variations of now adjacent X-direction electrode.This series of picture is analyzed with software, can be in the Y direction
Obtain the image higher than its physical electrode resolution.Therefore, the coordinate of each contact detected is exported, forms a frame fingerprint
Image；When finger is slided in the fingerprint identification module along Y-direction, multiframe fingerprint image 61 has just been obtained, has finally been incited somebody to action
The multiframe fingerprint image arrived synthesizes a complete fingerprint image 62, i.e., finally detect obtained fingerprint image, determine whether
Whether the fingerprint image matches with the fingerprint image that pre-sets.
Further, the fingerprint identification module 10 also includes being covered in the induction electrode 121 and driving electrodes 122
The protective layer of side.
The embodiment of the present invention additionally provides a kind of display device, and the display device includes display panel, for described
Display panel provides the FPC of the display panel of electric signal, and the display device also includes above-mentioned fingerprint identification module.
Preferably, the FPC in the fingerprint identification module is the FPC of display panel in display device, pass through one-time process
Form the PFC, it is possible to reduce process fabrication steps, reduce production cost.
Preferably, the display device also includes touch-control module, the touch-control module is connected by the FPC and external circuit
Connect；By the touch-control module, the touch controllable function of the display device can be achieved.
Preferably, the fingerprint recognition chip is electrically connected with fingerprint sensor circuit.The fingerprint recognition chip can be used for examining
The change of the electric capacity formed in the fingerprint drive circuit by driving electrodes and induction electrode is surveyed, and testing result is passed through into FPC
It is sent to external circuit.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (11)
1. a kind of fingerprint identification module, it is characterised in that including：
Flexible PCB FPC；
The fingerprint sensor circuit on the flexible PCB is arranged on, includes the driving electrodes and induction electrode of mutually insulated, its
In, the driving electrodes are extended in a first direction, and the induction electrode extends in a second direction, and the driving electrodes include multiple
The driving sub-electrode of mutually insulated, the width of the driving sub-electrode is 300um-500um, and the induction electrode includes multiple phases
The sensing sub-electrode mutually insulated, the width of the sensing sub-electrode is 30um-50um；
Fingerprint recognition chip, the fingerprint recognition chip is located at the side of the FPC, with the driving electrodes and induction electrode electricity
Connection, the change for detecting the electric capacity formed by the driving electrodes and induction electrode, and testing result is passed through into the FPC
It is sent to external circuit；Wherein, when finger is slided, multiframe fingerprint image is obtained, multiframe fingerprint image is synthesized into a complete finger
Print image, obtains finally detecting obtained image, and matched with preset fingerprint image.
2. module as claimed in claim 1, it is characterised in that the induction electrode and driving electrodes are located at the FPC respectively
Both sides；Or
The induction electrode and driving electrodes are located at the same side of the FPC.
3. module as claimed in claim 2, it is characterised in that when the induction electrode and driving electrodes are located at the FPC's
During the same side, the module also includes the insulating barrier being located between the induction electrode and driving electrodes.
4. module as claimed in claim 2, it is characterised in that the driving sub-electrode is strip, and parallel in the first direction
Distribution.
5. module as claimed in claim 2, it is characterised in that the sensing sub-electrode is strip, and parallel in a second direction
Distribution.
6. module as claimed in claim 1, it is characterised in that the driving sub-electrode and inductor electrode crossing are set.
7. the module as described in any claim of claim 1~6, it is characterised in that the module also includes protective layer, the guarantor
Sheath covers the induction electrode and driving electrodes.
8. a kind of display device, the display device includes display panel, for providing the aobvious of electric signal to the display panel
Show the FPC of panel, it is characterised in that described device also includes the fingerprint identification module described in any claim of claim 1~7.
9. device as claimed in claim 8, it is characterised in that the FPC in the fingerprint identification module is aobvious in display device
Show the FPC of panel.
10. device as claimed in claim 9, it is characterised in that the display device also includes touch-control module, the touch-control mould
Block is connected by the FPC with external circuit.
11. device as claimed in claim 8, it is characterised in that the fingerprint recognition chip is electrically connected with fingerprint sensor circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310754355.5A CN103927468B (en) | 2013-12-31 | 2013-12-31 | A kind of fingerprint identification module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310754355.5A CN103927468B (en) | 2013-12-31 | 2013-12-31 | A kind of fingerprint identification module and display device |
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| CN103927468A CN103927468A (en) | 2014-07-16 |
| CN103927468B true CN103927468B (en) | 2017-08-11 |
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| CN201310754355.5A Active CN103927468B (en) | 2013-12-31 | 2013-12-31 | A kind of fingerprint identification module and display device |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102280155B1 (en) * | 2015-02-04 | 2021-07-22 | 엘지디스플레이 주식회사 | Sensor screen and display device having the same |
| CN104636650A (en) * | 2015-02-05 | 2015-05-20 | 惠州Tcl移动通信有限公司 | Sliding type capacitance fingerprint identification method and system and unblocking method of system |
| CN104834426B (en) | 2015-05-22 | 2018-07-27 | 京东方科技集团股份有限公司 | Fingerprint recognition device, touch panel and display device |
| CN105117055B (en) * | 2015-08-14 | 2018-09-28 | 宸鸿科技(厦门)有限公司 | Press-type three dimensional signal input unit and application method and Multifunctional touch panel |
| CN105549872A (en) * | 2015-10-30 | 2016-05-04 | 东莞酷派软件技术有限公司 | Touch screen navigation method based on fingerprint identifier, and relevant equipment |
| CN107766777A (en) * | 2016-08-18 | 2018-03-06 | 北京小米移动软件有限公司 | Fingerprint recognition component, pressure detection method and fingerprint recognition IC |
| CN107766778A (en) * | 2016-08-19 | 2018-03-06 | 致伸科技股份有限公司 | Induction installation |
| CN108345872A (en) * | 2018-03-22 | 2018-07-31 | 深圳力合光电传感股份有限公司 | Fingerprint recognition harvester and system |
| CN109460731B (en) | 2018-11-05 | 2021-04-20 | 京东方科技集团股份有限公司 | Display device and fingerprint module attaching method |
| CN111353341A (en) * | 2018-12-21 | 2020-06-30 | 中兴通讯股份有限公司 | Fingerprint identification device, method, terminal and storage medium |
| CN109829419B (en) | 2019-01-28 | 2021-08-24 | 京东方科技集团股份有限公司 | Fingerprint identification module, driving method and manufacturing method thereof and display device |
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| JP4447952B2 (en) * | 2004-04-07 | 2010-04-07 | アルプス電気株式会社 | Charge detection circuit and fingerprint sensor using the same |
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