CN109407818A - Touch display screen and its full frame ultrasonic fingerprint identification module - Google Patents
Touch display screen and its full frame ultrasonic fingerprint identification module Download PDFInfo
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- CN109407818A CN109407818A CN201811405720.0A CN201811405720A CN109407818A CN 109407818 A CN109407818 A CN 109407818A CN 201811405720 A CN201811405720 A CN 201811405720A CN 109407818 A CN109407818 A CN 109407818A
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- Prior art keywords
- touch
- electrode block
- full frame
- display screen
- transmitting terminal
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/325—Power saving in peripheral device
- G06F1/3265—Power saving in display device
-
- 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
-
- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- 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
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Computer Security & Cryptography (AREA)
- Multimedia (AREA)
- Computer Hardware Design (AREA)
- Software Systems (AREA)
- Image Input (AREA)
Abstract
The invention discloses a kind of touch display screen and its full frame ultrasonic fingerprint identification modules, the module includes: piezoelectric material layer, it is layed on the piezoelectric material layer respectively, the transmitting terminal Tx and receiving end Rx of lower layer, wherein, the transmitting terminal Tx includes several mutually isolated electrode block, and the module further include: control recognition unit, for after the touch detection unit of the touch display screen detects the touch location of user's finger, electrode block for touch location corresponding region described in Tx provides AC signal, and fingerprint recognition is carried out according to the electric signal of Rx feedback.Power consumption when fingerprint recognition can be reduced using the present invention, improve the feasibility of full frame ultrasonic fingerprint schemes.
Description
Technical field
The present invention relates to ultrasonic fingerprint identification technology fields, particularly relate to a kind of touch display screen and its full frame ultrasonic fingerprint
Identification module.
Background technique
With economic and science and technology rapid development, quickly popularized by the consumer electronics product of representative of mobile phone.As hand
The most important component of machine --- display module also quickly develops, as consumer requires higher and higher, terminal to display module
Manufacturer constantly most seeks differentiation to the ID design of product.Currently, the product of superelevation screen accounting even full frame Rimless will be not
Come the trend developed.
Screen proposes requirement to fingerprint recognition comprehensively --- it can be directly embedded under glass or metal bottom, and in display surface
Any position capture fingerprint on plate, therefore also do not need button (HOME key) identification fingerprint, face glass from this without aperture,
Greatly increase the consistency of cell phone appearance.The requirement is realized there are two types of technique direction at present, one is the fingerprint recognition of optical profile type,
Another kind is ultrasonic type.
As shown in the figure 1, existing full frame ultrasonic fingerprint identification module is usually the panel (PNL) and substrate in display screen
Piezoelectric material PVDF (Poly-vinylidene Fluoride) layer is set between (e.g., GLASS), and layer is deposited on the piezoelectric materials
Transmitting terminal (Tx) electrode of one layer of full-sized is laid with receiving end (Rx) in lower layer；Usual Tx leads to AC signal, Tx and Rx
Voltage constantly changes before the two, so that PVDF generates vibration, issues ultrasonic wave；When finger touch panel, from finger
The ultrasonic wave being reflected back passes to PVDF, so that PVDF generates the variation of electric signal, after this variation feeds back to Rx, by signal processing
Chip reads progress data and converts to form fingerprint image.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of touch display screen and its full frame ultrasonic fingerprint identification module,
To reduce power consumption when fingerprint recognition, the feasibility of full frame ultrasonic fingerprint schemes is improved.
A kind of full frame ultrasonic fingerprint identification module of touch display screen is provided based on the above-mentioned purpose present invention, comprising: piezoelectricity
Material layer, the transmitting terminal Tx and receiving end Rx for being layed in the upper and lower layer of the piezoelectric material layer respectively, wherein the transmitting terminal Tx
Including several mutually isolated electrode block and the module further include:
Recognition unit is controlled, for detecting the touch position of user's finger in the touch detection unit of the touch display screen
It postpones, provides AC signal, and the electric signal fed back according to Rx for the electrode block of touch location corresponding region described in Tx
Carry out fingerprint recognition.
The present invention also provides a kind of touch display screens, comprising: includes: substrate and touch screen, and for detecting the touching
Touch the touch detection unit for shielding the touch location of upper user's finger, which is characterized in that further include: it is set to the substrate and touch
Full frame ultrasonic fingerprint identification module as described above between screen.
In main technical schemes of the invention, the transmitting terminal Tx of full frame ultrasonic fingerprint identification module is patterned into several
Mutually isolated electrode block, in this way, the electrode block that only touch event is related to provides alternating current when there is touch event generation
Signal greatly reduces powering area, to reach drop without providing AC signal for full frame transmitting terminal Tx electrode
The purpose of low-power consumption improves the feasibility of full frame ultrasonic fingerprint schemes.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of the full frame ultrasonic fingerprint identification module of the prior art；
Fig. 2 shows for the section of a kind of touch display screen provided in an embodiment of the present invention and its full frame ultrasonic fingerprint identification module
It is intended to；
Fig. 3 is that the electrode block of transmitting terminal Tx provided in an embodiment of the present invention is patterned into the schematic diagram of strip；
Fig. 4 is that the electrode block of transmitting terminal Tx provided in an embodiment of the present invention is patterned into the schematic diagram of diamond shape；
Fig. 5 is the schematic diagram for the transmitting terminal Tx electrode block that arrangement provided in an embodiment of the present invention is multiple lines and multiple rows；
Fig. 6 is the full frame ultrasonic fingerprint identification method flow chart of one kind provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that when we claim element to be " connected " or " coupling
Connect " to another element when, it can be directly connected or coupled to other elements, or there may also be intermediary elements.In addition, this
In " connection " or " coupling " that uses may include being wirelessly connected or wireless coupling.Wording "and/or" used herein includes one
A or more associated whole for listing item or any cell and all combination.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The non-equal entity of a same names or non-equal parameter, it is seen that " first " " second " only for the convenience of statement, does not answer
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
In main technical schemes of the invention, the transmitting terminal Tx of full frame ultrasonic fingerprint identification module is patterned into several
Mutually isolated electrode block；In this way, the electrode block that only touch event is related to provides alternating current when there is touch event generation
Signal greatly reduces powering area, to reach drop without providing AC signal for full frame transmitting terminal Tx electrode
The purpose of low-power consumption improves the feasibility of full frame ultrasonic fingerprint schemes.Embodiment that the invention will now be described in detail with reference to the accompanying drawings
Technical solution.
A kind of touch display screen provided in an embodiment of the present invention, sectional view are as shown in Figure 2, comprising: touch screen 204 and its touching
Detection unit, substrate (e.g., GLASS) 205, signal processing chip 206 are touched, and is set between touch screen 204 and substrate 205
Full frame ultrasonic fingerprint identification module.
Wherein, include: piezoelectric material layer 202 in full frame ultrasonic fingerprint identification module, be layed in 202 upper layer of piezoelectric material layer
Transmitting terminal Tx201, be layed in the receiving end Rx203 of 202 lower layer of piezoelectric material layer, and be set to signal processing chip 206
In control recognition unit.
Wherein, transmitting terminal Tx201 includes several mutually isolated electrode block；For each electrode block of transmitting terminal Tx201,
Signal processing chip 206 and the electrode block are all connected with a supply lines.
Touch detection unit is used to detect the touch location of user's finger on touch screen 204.
Control recognition unit in signal processing chip 206 is used to detect in the touch detection unit of the touch display screen
To after the touch location of user's finger, the transmitting terminal Tx201 electrode block of the only described touch location corresponding region passes through supply lines
AC signal is provided, and fingerprint recognition is carried out according to the electric signal of receiving end Rx203 feedback.
Specifically, since signal processing chip 206 and full frame ultrasonic fingerprint identification module are respectively arranged at the two sides of substrate,
Then it can pass through FPC (Flexible Printed between signal processing chip 206 and full frame ultrasonic fingerprint identification module
Circuit Board, flexible circuit board) transmitting electric signal.
Several mutually isolated electrode block in transmitting terminal Tx201 can arrange as a line multiple row or multiple lines and multiple rows, for example,
As in Figure 3-5.
It can be and be patterned into multiple strip structures extended in the same direction as shown in Figure 3 when being laid with, it can also be with
It is patterned into other shapes, such as the staggered diamond shape of multiple transverse and longitudinals as shown in Figure 4, the diamond structure between adjacent rows is protected
Pattern complementary under the premise of card insulation guarantees that larger area is laid with electrode block, improves fingerprint recognition precision.It is multirow for arrangement
The electrode block of the transmitting terminal Tx201 of multiple row, above-mentioned control recognition unit are specifically used for examining in the touch of the touch display screen
After surveying the touch location that unit detects user's finger, the electrode block of the corresponding row, column of touch location in only transmitting terminal Tx201
AC signal is provided, and fingerprint recognition is carried out according to the electric signal of receiving end Rx203 feedback.
Preferably, can also be equipped with air between touch screen 204 and the transmitting terminal Tx201 of full frame ultrasonic fingerprint identification module
Layer 207, so that the ultrasound that piezoelectric material layer 202 issues can be transmitted to touch screen 204 via air layer 207, then via touch
Screen 204, which is transmitted to after the finger pressed on touch screen 204, is reflected back piezoelectric material layer 202 by finger.
Based on above-mentioned full frame ultrasonic fingerprint identification module, the full frame ultrasonic fingerprint recognition of one kind provided in an embodiment of the present invention
Method, process is as shown in fig. 6, include the following steps:
Step S601: the touch event of touch display screen is detected.
In this step, when the finger of people touches the touch screen of touch display screen, the touch detection list of touch display screen
Member can detecte touch event, and determine the touch location of user's finger in touch event.
Step S602: the electrode block of the transmitting terminal Tx201 of the touch location corresponding region is determined.
In this step, after touch detection unit detects touch event, control recognition unit can be according to touch event
The touch location of middle user's finger determines the electrode block of the transmitting terminal Tx201 of touch location corresponding region.
For example, the touch location of touch event has corresponded to some or certain several electrode blocks in transmitting terminal Tx201, then control
Recognition unit processed can then determine the electrode block or this several electrode block is the transmitting terminal Tx201 of touch location corresponding region
Electrode block.
More preferably, control recognition unit is after determining the electrode block of transmitting terminal Tx201 of touch location corresponding region, also
The wherein lesser electrode block of corresponding position can be screened out, by remaining as finally determining electrode block.For example, control identification is single
Member is after determining two electrode blocks of transmitting terminal Tx involved in touch event, if corresponding touch in one of electrode block
The area in region is less than given threshold, then only using another electrode block as finally determining electrode block.
Step S603: the electrode block for determining transmitting terminal Tx201 provides AC signal.
Preferably, the case where electrode block arrangement for transmitting terminal Tx201 is multiple lines and multiple rows, can be transmitting terminal Tx201
Described in the corresponding row, column of touch location electrode block provide AC signal.
Step S604: fingerprint recognition is carried out according to the electric signal of receiving end Rx203 feedback.
In fact, since the electrode block of the transmitting terminal Tx201 to touch location corresponding region provides AC signal,
Then the AC signal between the transmitting terminal Tx below touch location and receiving end Rx can make intermediate piezoelectric material
Vibration is generated, ultrasonic wave is issued；After ultrasonic wave passes to piezoelectric material by finger return, so that piezoelectric material generates the change of electric signal
Change, receiving end Rx perceive electric signal variation, and to control recognition unit fed back, allow control recognition unit according to
The electric signal of Rx feedback carries out fingerprint recognition.In the process, alternation only is provided to the electrode block of touch location corresponding region
Current signal, it is not necessary to provide AC signal to full frame transmitting terminal Tx, can equally complete fingerprint recognition, but significantly
Power consumption is reduced, the feasibility of full frame ultrasonic fingerprint schemes is improved.
That is, in main technical schemes of the invention, by the transmitting terminal Tx figure of full frame ultrasonic fingerprint identification module
Turn to several mutually isolated electrode blocks；In this way, when there is touch event generation, the only electrode of touch location corresponding region
Block provides AC signal and greatly reduces power supply without providing AC signal for full frame transmitting terminal Tx electrode
Area improves the feasibility of full frame ultrasonic fingerprint schemes to achieve the purpose that reduce power consumption.
Those skilled in the art of the present technique are appreciated that the present invention includes being related to for executing in operation described herein
One or more equipment.These equipment can specially design and manufacture for required purpose, or also may include general
Known device in computer.These equipment have the computer program being stored in it, these computer programs are selectively
Activation or reconstruct.Such computer program can be stored in equipment (for example, computer) readable medium or be stored in
It e-command and is coupled in any kind of medium of bus respectively suitable for storage, the computer-readable medium includes but not
Be limited to any kind of disk (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk), ROM (Read-Only Memory, only
Read memory), RAM (Random Access Memory, immediately memory), EPROM (Erasable Programmable
Read-Only Memory, Erarable Programmable Read only Memory), EEPROM (Electrically Erasable
Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or light card
Piece.It is, readable medium includes by equipment (for example, computer) with any Jie for the form storage or transmission information that can be read
Matter.
Those skilled in the art of the present technique be appreciated that can be realized with computer program instructions these structure charts and/or
The combination of each frame and these structure charts and/or the frame in block diagram and/or flow graph in block diagram and/or flow graph.This technology neck
Field technique personnel be appreciated that these computer program instructions can be supplied to general purpose computer, special purpose computer or other
The processor of programmable data processing method is realized, to pass through the processing of computer or other programmable data processing methods
The scheme specified in frame or multiple frames of the device to execute structure chart and/or block diagram and/or flow graph disclosed by the invention.
Those skilled in the art of the present technique have been appreciated that in the present invention the various operations crossed by discussion, method, in process
Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with having been crossed by discussion in the present invention
Kind of operation, method, other steps, measures, and schemes in process may also be alternated, changed, rearranged, decomposed, combined or deleted.
Further, in the prior art to have and the step in various operations, method disclosed in the present invention, process, measure, scheme
It may also be alternated, changed, rearranged, decomposed, combined or deleted.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or can also be combined between the technical characteristic in different embodiments, step can be realized with random order, and be existed such as
Many other variations of the upper different aspect of the invention, for simplicity, they are not provided in details.Therefore, it is all
Within the spirit and principles in the present invention, any omission, modification, equivalent replacement, improvement for being made etc. be should be included in of the invention
Within protection scope.
Claims (10)
1. a kind of full frame ultrasonic fingerprint identification module of touch display screen, comprising: piezoelectric material layer is layed in the piezoelectricity respectively
The transmitting terminal Tx and receiving end Rx of the upper and lower layer of material layer, which is characterized in that the transmitting terminal Tx includes several mutually isolated electricity
Pole block and the module further include:
Recognition unit is controlled, for detecting the touch location of user's finger in the touch detection unit of the touch display screen
Afterwards, the electrode block for touch location corresponding region described in Tx provides AC signal, and according to the electric signal of Rx feedback into
Row fingerprint recognition.
2. module according to claim 1, which is characterized in that the electrode block arrangement of the Tx is a line multiple row.
3. module according to claim 1, which is characterized in that the electrode block arrangement of the Tx is multiple lines and multiple rows；And
The control recognition unit is specifically used for detecting the touching of user's finger in the touch detection unit of the touch display screen
After touching position, the electrode block for the corresponding row, column of touch location described in Tx provides AC signal.
4. module according to claim 1 to 3, which is characterized in that the electrode block of the Tx be it is graphical after strip
Electrode block.
5. module according to claim 3, which is characterized in that the electrode block of the Tx be it is graphical after diamond shaped electricity
Pole block.
6. module according to claim 5, which is characterized in that the electrode block of the diamond shaped is staggered for transverse and longitudinal, phase
Diamond structure between adjacent rows guarantees pattern complementary under the premise of insulation.
7. -6 any module according to claim 1, which is characterized in that the full frame ultrasonic fingerprint identification module is set to
Between the touch screen and substrate of the touch display screen.
8. module according to claim 7, which is characterized in that in the touch screen and the full frame ultrasonic fingerprint recognition mould
Air layer is equipped between the transmitting terminal Tx of block.
9. a kind of touch display screen, comprising: substrate and touch screen, and the touch for detecting user's finger on the touch screen
The touch detection unit of position, which is characterized in that further include: be set between the substrate and touch screen such as claim 1-
7 any full frame ultrasonic fingerprint identification modules.
10. touch display screen according to claim 8, which is characterized in that refer in the touch screen and the full frame ultrasound
Air layer is equipped between the transmitting terminal Tx of line identification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811405720.0A CN109407818A (en) | 2018-11-23 | 2018-11-23 | Touch display screen and its full frame ultrasonic fingerprint identification module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811405720.0A CN109407818A (en) | 2018-11-23 | 2018-11-23 | Touch display screen and its full frame ultrasonic fingerprint identification module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109407818A true CN109407818A (en) | 2019-03-01 |
Family
ID=65455291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811405720.0A Pending CN109407818A (en) | 2018-11-23 | 2018-11-23 | Touch display screen and its full frame ultrasonic fingerprint identification module |
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Cited By (3)
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| CN112001316A (en) * | 2020-08-25 | 2020-11-27 | 京东方科技集团股份有限公司 | Ultrasonic fingerprint identification module, manufacturing method thereof and display device |
| CN113419645A (en) * | 2021-07-15 | 2021-09-21 | 业泓科技(成都)有限公司 | Ultrasonic fingerprint identification module, electronic equipment and ultrasonic fingerprint identification method |
| US11749010B2 (en) | 2021-01-21 | 2023-09-05 | Xiamen Tianma Micro-Electronics Co., Ltd. | Fingerprint recognition module, display panel and driving method, and display device |
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