CN110119729B - Fingerprint identification module and fingerprint identification touch display applying same - Google Patents
Fingerprint identification module and fingerprint identification touch display applying same Download PDFInfo
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- CN110119729B CN110119729B CN201910443473.1A CN201910443473A CN110119729B CN 110119729 B CN110119729 B CN 110119729B CN 201910443473 A CN201910443473 A CN 201910443473A CN 110119729 B CN110119729 B CN 110119729B
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- 239000000126 substance Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 101100520142 Caenorhabditis elegans pin-2 gene Proteins 0.000 description 2
- 238000005286 illumination Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/94—Hardware or software architectures specially adapted for image or video understanding
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
Abstract
A fingerprint identification module is arranged in a touch display area. The fingerprint identification module comprises a fingerprint sensor, a data input circuit and a multiplexer array. The fingerprint sensor comprises a plurality of fingerprint sensing electrodes, wherein the fingerprint sensing electrodes are divided into N groups, and each group is provided with MxY fingerprint sensing electrodes. The data input circuit comprises N groups of M electrode leads and M data lines, wherein each group of M electrode leads is independently and electrically connected with the corresponding Y fingerprint sensing electrodes in each row of M rows in each group, and the M electrode leads in each group are electrically connected with the corresponding M data lines respectively. The multiplexer array includes N switching circuits corresponding to the N sets of electrode wires, wherein one of the N switching circuits independently receives a turn-on signal for turning on the set of electrode wires corresponding to the switching circuit.
Description
Technical Field
The present invention relates to an identification module, and more particularly, to a fingerprint identification module and a fingerprint identification touch display using the same.
Background
Generally, the touch display panel and the fingerprint recognition module of the smart phone are separate modules and are separately manufactured and then assembled together. Therefore, it is usually necessary to press a fingerprint on a specific fingerprint identification area to realize fingerprint identification, such as the Home key of the iphone. In addition, such a front-end fingerprinting module usually compresses the screen display area, reducing the screen occupation ratio.
As mobile phone manufacturers continue to develop high screen occupation ratio of the screen, how to perform fingerprint recognition in the full screen range to improve the integrity and screen occupation ratio of the display device is an urgent issue to be solved in the industry.
Disclosure of Invention
The invention relates to a fingerprint identification module and a fingerprint identification touch display using the same, which can identify fingerprints in a touch display area without additionally arranging a fingerprint sensor with a single-point fixed position so as to improve the integrity and the screen occupation ratio of a display device.
According to an aspect of the present invention, a fingerprint identification module is disposed in a touch display area. The fingerprint identification module comprises a fingerprint sensor, a data input circuit and a multiplexer array. The fingerprint sensor comprises a plurality of fingerprint sensing electrodes, wherein the fingerprint sensing electrodes are divided into N groups, and each group is provided with MxY fingerprint sensing electrodes. The data input circuit comprises N groups of M electrode leads and M data lines, wherein each group of M electrode leads is independently and electrically connected with the corresponding Y fingerprint sensing electrodes in each row of M rows in each group, and the M electrode leads in each group are electrically connected with the corresponding M data lines respectively. The multiplexer array comprises N switching circuits corresponding to the N groups of electrode wires, wherein one of the N switching circuits independently receives a switch-on signal for switching on the group of electrode wires corresponding to the switching circuit, and N, M and Y are positive integers greater than 1.
According to an aspect of the present invention, a fingerprint identification touch display is provided, which includes a touch display panel, a controller and the fingerprint identification module. The touch display panel is provided with a touch display area. The controller is connected with the touch display panel. The fingerprint identification module is arranged in the touch display area.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a schematic diagram of a fingerprint identification touch display according to an embodiment of the invention.
FIG. 2 shows a schematic diagram of a fingerprint identification module according to an embodiment of the invention.
FIG. 3 is an enlarged schematic view of the lower wiring area of the fingerprint identification module of FIG. 2.
Figure 4 shows a schematic diagram of 180 fingerprint sensing electrodes each divided into 6 groups.
Fig. 5 is a schematic diagram showing pulse signals of 6 switching circuits of the multiplexer array and pulse signals received by each data line.
Fig. 6A and 6B are schematic diagrams respectively illustrating pulse signals of 6 switching circuits of a multiplexer array according to two embodiments of the present invention.
Wherein, the reference numbers:
100: fingerprint identification touch display
110: touch control display panel
112: touch display area
116: fingerprint touch position
120: controller
130: fingerprint identification module
131: fingerprint sensor
132: fingerprint induction electrode
133: data input circuit
134: electrode lead
135: data line
136: signal line
141: multiplexer array
142: switching circuit
Pin _ 1: first data line
Pin _ 2: second data line
Pin _ M: m data line
MUX 1: first switch circuit
MUX 2: second switch circuit
MUXN: nth switching circuit
SP: pulse signal
T _ line: column scan time
D: width of
N, M, Y: number of
Detailed Description
The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
the following embodiments are provided for illustrative purposes only and are not intended to limit the scope of the present invention. The following description will be given with the same/similar reference numerals as used for the same/similar elements. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are referred to only in the direction of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.
According to an embodiment of the present invention, a fingerprint recognition module capable of recognizing a fingerprint at any position in a touch display area is provided to realize full-screen fingerprint recognition. The fingerprint identification module of the present embodiment may adopt an optical sensing manner, when a finger touches any position (such as a fingerprint position shown in fig. 1) on the touch display panel, the finger is reflected to the fingerprint sensor by backlight illumination, and fingerprint information is obtained by the difference of the reflectivity of the peaks and the valleys of the ridges, so as to obtain the touch position of the finger. When the touch display panel is in the fingerprint identification mode, the controller (such as the fingerprint identification controller) can drive the fingerprint sensing electrode in the fingerprint identification module by the partition, so that the fingerprint sensing electrode can sense the fingerprint in the fingerprint identification mode, and transmits a fingerprint sensing signal back to the controller for identifying the fingerprint. In addition, when the touch display panel is in the touch sensing mode, the fingerprint identification module can be turned off, only the touch position of the finger is allowed to be detected, but the fingerprint identification function is not performed. In an embodiment, the fingerprint identification module and the touch display panel may be manufactured independently, or the fingerprint identification module and the touch display panel may be manufactured integrally and then assembled on the handheld electronic device (e.g., the full-screen smart phone shown in fig. 1).
Referring to fig. 1 and 2, according to an embodiment of the invention, a fingerprint identification touch display 100 includes a touch display panel 110, a controller 120 and a fingerprint identification module 130. The touch display panel 110 has a touch display area 112, such as a full-screen display screen (screen content is greater than 80% or 90%) or a smaller-screen display screen (e.g. less than 80%), which is not limited by the invention. The controller 120 is connected to the touch display panel 110 for driving the fingerprint recognition module 130. The fingerprint identification module 130 is disposed in the touch display area 112 for sensing and identifying a fingerprint.
In one embodiment, the touch display panel 110 is used for detecting a fingerprint touch position 116 located in the touch display area 112, and the controller 120 generates a switch-on signal (i.e., the pulse signal SP) according to the fingerprint touch position 116 to drive the fingerprint identification module 130. In addition, the controller 120 may drive the fingerprint sensing electrodes 132 in the fingerprint identification module 130 by the partitions, so that the fingerprint sensing electrodes 132 in the corresponding partitions can sense the fingerprint of the finger in the fingerprint identification mode. The fingerprint identification module 130 may transmit the fingerprint sensing signal back to the controller 120 for identifying the fingerprint.
Referring to fig. 2 and 3, in an embodiment, the fingerprint identification module 130 includes a fingerprint sensor 131, a data input circuit 133, and a multiplexer array 141. The fingerprint sensor 131 includes a plurality of fingerprint sensing electrodes 132, and in order to drive the fingerprint sensor 131 in a divisional manner, the fingerprint sensing electrodes 132 are divided into N groups, each group having MxY fingerprint sensing electrodes 132. Referring to fig. 3, the fingerprint sensing electrodes 132 are divided into, for example, 6 groups (N is 6) in the short side direction of the body, and each group has, for example, 180 × 1920 (M is 180, Y is 1920) fingerprint sensing electrodes 132, but the number of groups and the number of electrodes in each group are not limited. For each set of MxY fingerprint sensing electrodes 132, the data input circuit 133 has N sets of M electrode wires 134, and is independently electrically connected to the corresponding Y fingerprint sensing electrodes 132 in each row of M rows in each set. In addition, the data input circuit 133 is provided with M data lines 135, which are electrically connected to the M electrode wires 134 in each group, respectively, relative to the N groups of M electrode wires 134 in each group.
Therefore, in fig. 3 and 4, the data input circuit 133 is formed with NxM electrode wires 134 and M data lines 135 arranged in a crossing manner in the wiring region 114. The first electrode wire 134 in each group is electrically connected to the first data line 135(Pin _1), the second electrode wire 134 in each group is electrically connected to the second data line 135(Pin _2), and the mth electrode wire 134 in each group is electrically connected to the mth data line 135(Pin _ M), and are sequentially arranged below the touch display area 112.
In addition, in order to drive the fingerprint sensor 131 in a divisional manner, the multiplexer array 141 includes N switching circuits 142 corresponding to the N sets of electrode leads 134. That is, the first switch circuit 142(MUX1) may be connected to or disconnected from the M electrode wires 134 in the first group, and the second switch circuit 142(MUX2) may be connected to or disconnected from the M electrode wires 134 in the second group. Referring to fig. 3 and 5, at the same time, only one switch circuit 142 is turned on with the corresponding group of M electrode wires 134, and the remaining N-1 switch circuits 142 are turned off. Therefore, in fig. 3, only one of the N switching circuits 142 independently receives a turn-on signal (i.e., the pulse signal SP) for turning on the group of electrode wires 134 corresponding to the switching circuit 142, and the remaining N-1 switching circuits 142 are in an off state.
In addition, when one switch circuit 142 in the multiplexer array 141 receives a turn-on signal, the M data lines 135 can be turned on to receive the fingerprint sensing signal from one of the M electrode wires 134. Referring to fig. 5, when the second switch circuit 142(MUX2) receives a turn-on signal, the pulse signal SP of the second switch circuit 142(MUX2) is at a high level, the remaining N-1 switch circuits 142 are at a low level, and the pulse signals SP of the M data lines 135 are also at a high level, so as to obtain the sensing signal of the optically-sensed fingerprint sensor 131. The on signal is, for example, a charging signal indicating that the electrodes of the fingerprint sensor 131 are charged, and the charging signal has a charging pulse duration. The charging pulse time may be less than or equal to a column scan time T _ line. Since the multiplexer array 141 of the present invention does not have a delay (delay) problem between the on/off operations, the charging time of the fingerprint sensor 131 can be greatly increased. In this embodiment, the frame display time is about 16.67ms and the column scan time T _ line is about 8.68 μ s/column (total of 1920 columns) calculated by the screen update rate of 60Hz, so the charging pulse time can reach 8.68 μ s.
Referring to fig. 6A and 6B, the charging time of the fingerprint sensor 131 is not limited to one row scanning time T _ line, and may be less than one row scanning time T _ line. In fig. 6A, the second switch circuit 142(MUX2) is turned on and the charging pulse time is approximately equal to one column scan time T _ line, while in fig. 6B, the second switch circuit 142 is turned on and the charging pulse time of the pulse signal SP1 is approximately equal to one-half column scan time T _ line, and thereafter, the second switch circuit 142 is turned off, the third switch circuit 142 is turned on and the charging pulse time of the pulse signal SP2 is approximately equal to one-half column scan time T _ line. That is, the electrodes of the fingerprint sensor 131 in the two sub-areas may be charged in time division within one column of the scanning time T _ line. In the present embodiment, the column scan time T _ line is about 8.68 μ s/column when the screen update rate is 60Hz, and therefore the charging pulse time can reach 4.34 μ s. The above-mentioned charging pulse time is only an example, and the present invention is not limited thereto.
Referring to fig. 3, in the present embodiment, the multiplexer array 141 is divided into 6 groups, so that the number of multiplexers can be reduced, and the controller 120 only needs 6 signal lines 136 to be electrically connected to the switching circuits 142 of the 6 groups of multiplexers, so as to reduce the layout area of the signal lines 136. In addition, in the present embodiment, the controller 120 only needs 180 data lines 135 to receive the fingerprint sensing signal, so that the wiring area of the data lines 135 can be reduced. In the present embodiment, when the wiring areas of the signal lines 136 and the data lines 135 are decreased, the width D (see fig. 1) of the wiring region 114 under the touch display area 112 can be greatly decreased, for example, decreased from 4000 μm to 3000 μm, so as to decrease the size of the fingerprint recognition module 130 and the overall size of the fingerprint recognition module 130 and the touch display panel 110 after assembly.
In addition, in the embodiment, the on signal can be provided by the touch display panel 110 directly determining the fingerprint touch position 116, or the controller 120 sequentially scans the multiplexer array 141, and when a touch event occurs, the on signal is sent to a switch circuit 142 in the multiplexer array 141.
The fingerprint identification module and the fingerprint identification touch display using the same disclosed in the embodiments of the invention can identify a fingerprint at any position in the touch display area without additionally arranging a fingerprint sensor with a single point fixed position, so that the integrity of the display device can be improved without limitation in appearance, and the market demand of high screen occupation ratio can be met.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a fingerprint identification module, sets up in a touch-control display area, its characterized in that, this fingerprint identification module includes:
a fingerprint sensor comprising a plurality of fingerprint sensing electrodes, the plurality of fingerprint sensing electrodes being divided into N groups, each group having M х Y fingerprint sensing electrodes;
a data input circuit, including N groups of M electrode wires and M data lines, wherein each group of M electrode wires is independently and electrically connected with the corresponding M rows and each column of Y fingerprint sensing electrodes in each group, and the M electrode wires in each group are respectively and electrically connected with the corresponding M data lines; and
a multiplexer array including N switching circuits corresponding to the N sets of electrode leads, wherein one of the N switching circuits independently receives a turn-on signal for turning on the set of electrode leads corresponding to the switching circuit, wherein N, M, Y is a positive integer greater than 1; wherein the content of the first and second substances,
when one of the N switch circuits receives a switch-on signal, the M data lines corresponding to the one of the N switch circuits simultaneously output high potential.
2. The fingerprint identification module of claim 1, wherein the turn-on signal is an electrode charging signal.
3. The fingerprint identification module of claim 2, wherein the electrode charging signal corresponds to a charging pulse time.
4. The fingerprint recognition module of claim 3, wherein the charging pulse time is less than or equal to a column scan time.
5. The fingerprint recognition module of claim 3, wherein the charging pulse time is less than or equal to one-half of a row scan time.
6. The fingerprint recognition module of claim 1, further comprising a controller for receiving a fingerprint sensing signal recognized by the fingerprint sensor.
7. The module of claim 6, wherein the controller is connected to a touch display panel for detecting a fingerprint touch position within the touch display area, and the controller generates the switch-on signal to the multiplexer array according to the fingerprint touch position.
8. A fingerprint identification touch display, comprising:
a touch display panel having a touch display area;
a controller connected to the touch display panel; and
the fingerprint identification module according to any one of claims 1 to 5, disposed in the touch display area.
9. The touch screen of claim 8, wherein the touch display panel is configured to detect a fingerprint touch position within the touch display area, and the controller generates the turn-on signal to the multiplexer array according to the fingerprint touch position.
10. The touch-sensitive display for fingerprint recognition of claim 8, wherein the controller is configured to receive a fingerprint sensing signal recognized by the fingerprint sensor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107139201 | 2018-11-05 | ||
| TW107139201A TWI688899B (en) | 2018-11-05 | 2018-11-05 | Fingerprint identification module and fingerprint identification touch display using the same |
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| Publication Number | Publication Date |
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| CN110119729A CN110119729A (en) | 2019-08-13 |
| CN110119729B true CN110119729B (en) | 2022-02-11 |
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| TW (1) | TWI688899B (en) |
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| CN110531898A (en) * | 2019-09-20 | 2019-12-03 | 深圳芯启航科技有限公司 | A kind of capacitive induction unit control method, system and device |
| TWI720682B (en) | 2019-11-08 | 2021-03-01 | 友達光電股份有限公司 | Pixel array substrate |
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| CN105760014A (en) * | 2015-11-30 | 2016-07-13 | 友达光电股份有限公司 | Display device with fingerprint identification function and operation method thereof |
| CN106295473A (en) * | 2015-05-27 | 2017-01-04 | 鸿富锦精密工业（深圳）有限公司 | Fingerprint identification device and there is the electronic installation of this fingerprint identification device |
| CN107946346A (en) * | 2017-11-24 | 2018-04-20 | 武汉华星光电半导体显示技术有限公司 | A kind of full frame fingerprint recognition touching display screen |
| CN108256409A (en) * | 2017-10-27 | 2018-07-06 | 京东方科技集团股份有限公司 | Display device and its fingerprint identification method |
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| KR101189273B1 (en) * | 2005-09-07 | 2012-10-09 | 삼성디스플레이 주식회사 | Driving apparatus for display device and display device including the same |
| TW201543376A (en) * | 2014-05-09 | 2015-11-16 | Elan Microelectronics Corp | Capacitive fingerprint sensing device and system |
| TWI526944B (en) * | 2014-10-24 | 2016-03-21 | 義隆電子股份有限公司 | Fingerprint Sensing Device and Method of Detecting Finger Touch Thereof |
| CN104809448B (en) * | 2015-05-08 | 2017-03-15 | 京东方科技集团股份有限公司 | Fingerprint sensor and display device |
| CN105159506A (en) * | 2015-09-30 | 2015-12-16 | 信利光电股份有限公司 | Touch screen with fingerprint identification function, display panel and touch display apparatus |
| TWI636393B (en) * | 2017-07-31 | 2018-09-21 | 敦泰電子有限公司 | In-display optical fingerprint identification display device |
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2018
- 2018-11-05 TW TW107139201A patent/TWI688899B/en active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106295473A (en) * | 2015-05-27 | 2017-01-04 | 鸿富锦精密工业（深圳）有限公司 | Fingerprint identification device and there is the electronic installation of this fingerprint identification device |
| CN105760014A (en) * | 2015-11-30 | 2016-07-13 | 友达光电股份有限公司 | Display device with fingerprint identification function and operation method thereof |
| CN108256409A (en) * | 2017-10-27 | 2018-07-06 | 京东方科技集团股份有限公司 | Display device and its fingerprint identification method |
| CN107946346A (en) * | 2017-11-24 | 2018-04-20 | 武汉华星光电半导体显示技术有限公司 | A kind of full frame fingerprint recognition touching display screen |
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| TWI688899B (en) | 2020-03-21 |
| TW202018581A (en) | 2020-05-16 |
| CN110119729A (en) | 2019-08-13 |
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