WO2020248934A1 - 指纹识别触控面板及其制造方法、显示装置 - Google Patents

指纹识别触控面板及其制造方法、显示装置 Download PDF

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Publication number
WO2020248934A1
WO2020248934A1 PCT/CN2020/094901 CN2020094901W WO2020248934A1 WO 2020248934 A1 WO2020248934 A1 WO 2020248934A1 CN 2020094901 W CN2020094901 W CN 2020094901W WO 2020248934 A1 WO2020248934 A1 WO 2020248934A1
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WIPO (PCT)
Prior art keywords
fingerprint recognition
substrate
fingerprint
touch panel
fingerprint identification
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PCT/CN2020/094901
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English (en)
French (fr)
Inventor
张雷
陈俊生
李红敏
Original Assignee
京东方科技集团股份有限公司
合肥京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 合肥京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/256,139 priority Critical patent/US20210232790A1/en
Publication of WO2020248934A1 publication Critical patent/WO2020248934A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
    • 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
    • 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
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • 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
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • 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

Definitions

  • the present disclosure belongs to the field of display technology, and specifically relates to a fingerprint recognition touch panel, a manufacturing method thereof, and a display device.
  • fingerprint identification is a relatively advanced and widely used method. Because each person's fingerprint is unique, the fingerprint identification authentication method is very safe and convenient to use.
  • An embodiment of the present disclosure provides a fingerprint recognition touch panel, including: a display module; a fingerprint recognition substrate located on a side of a light-emitting surface of the display module; and a fingerprint recognition chip configured to interact with the fingerprint
  • the identification substrate is electrically connected to identify fingerprint information according to the detection signal of the fingerprint identification substrate, wherein the orthographic projection of the fingerprint identification substrate on the liquid crystal module and the fingerprint identification chip on the liquid crystal module The orthographic projections do not overlap.
  • the fingerprint recognition substrate includes: a first substrate; and a plurality of fingerprint recognition units located on the first substrate, each of the fingerprint recognition units includes: driving electrodes and sensing electrodes arranged side by side.
  • the driving electrode is used to receive a driving signal.
  • the sensing electrode is used to sense the change in capacitance between the sensing electrode and the driving electrode as the detection signal in the fingerprint recognition stage.
  • the fingerprint recognition substrate further includes: a plurality of scan lines and a plurality of read lines; the scan lines and the read lines are intersected to define the fingerprint recognition unit; wherein,
  • the driving electrodes in the fingerprint identification units located in the same row are connected to the same scan line;
  • the sensing electrodes in the fingerprint identification units located in the same column are connected to the same reading line.
  • the fingerprint recognition substrate further includes: a flexible circuit board; the fingerprint recognition chip is located on the flexible circuit board, wherein the multiple scan lines and the multiple read lines are The flexible circuit board is bound and connected, so that the plurality of scanning lines and the plurality of reading lines are electrically connected to the fingerprint identification chip.
  • the resolution of the fingerprint recognition substrate is 200ppi to 400ppi.
  • the area of each fingerprint identification unit is 80 ⁇ m to 200 ⁇ m.
  • the total area of each fingerprint identification unit is 4 mm ⁇ 4 mm to 10 mm ⁇ 10 mm.
  • the first base material includes glass.
  • the display module includes a first substrate and a second substrate that are opposed to each other; wherein, the first substrate includes: a first base substrate; wherein,
  • the first base substrate serves as the first base.
  • the display module includes a first substrate and a second substrate that are opposed to each other; wherein, the first substrate includes: a first base substrate; wherein,
  • the first base substrate is connected to the first base through a first connection layer.
  • the material of the first connection layer includes any one of transparent optical conductive glue, optical liquid glue, and sealant.
  • the fingerprint recognition touch panel further includes a cover plate located on a side of the fingerprint recognition substrate away from the display module.
  • the fingerprint recognition touch panel further includes: an upper polarizer on the light emitting surface side of the display module; wherein, the upper polarizer is used as the cover plate.
  • the cover plate is connected to the fingerprint recognition substrate through a second connection layer.
  • the material of the second connection layer includes any one of transparent optical conductive glue, optical liquid glue, and sealant.
  • the display module includes a liquid crystal module.
  • An embodiment of the present disclosure provides a display device including the above-mentioned fingerprint recognition touch panel.
  • An embodiment of the present disclosure provides a method of manufacturing the above-mentioned touch panel with fingerprint recognition function, the method including:
  • a fingerprint recognition substrate is formed on the light emitting surface side of the display module
  • the fingerprint identification substrate and the fingerprint identification chip are electrically connected.
  • the fingerprint recognition substrate includes: a first substrate; a plurality of fingerprint recognition units, forming the fingerprint recognition substrate on the light emitting surface side of the display module further includes:
  • the plurality of fingerprint identification units are formed on the surface of the first substrate away from all the display modules, wherein each fingerprint identification unit includes driving electrodes and sensing electrodes arranged side by side.
  • the fingerprint identification substrate further includes: a plurality of scan lines and a plurality of read lines; the plurality of scan lines and the plurality of read lines are arranged to intersect to define each fingerprint identification unit, The method also includes:
  • the multiple scanning lines and multiple reading lines are formed on the surface of the first substrate away from the display module, wherein:
  • the driving electrodes in the fingerprint identification units located in the same row are connected to the same scan line;
  • the sensing electrodes in the fingerprint identification units located in the same column are connected to the same reading line.
  • the above method further includes: electrically connecting the plurality of scan lines and the plurality of read lines to the fingerprint identification chip.
  • FIG. 1 is a schematic structural diagram of a fingerprint recognition touch panel according to an embodiment of the present disclosure
  • Fig. 2 is a schematic diagram of the arrangement of a fingerprint recognition unit according to an embodiment of the present disclosure.
  • FIG. 3 is a flowchart of manufacturing a fingerprint recognition touch panel according to an embodiment of the present disclosure.
  • An embodiment of the present disclosure provides a touch panel with fingerprint recognition function, which includes a display module and a fingerprint recognition substrate on the light-emitting surface side of the display module; wherein, the display module may be a liquid crystal module or It is an organic electroluminescent diode display module.
  • the display module is mainly a liquid crystal module as an example for description.
  • the liquid crystal module can specifically include a first substrate and a second substrate that are opposed to each other; wherein, the first substrate can be a color filter substrate, and the second substrate is an array substrate; of course, the first substrate can be a pair of cell substrates, and the second substrate
  • the second substrate is a COA (Color On Array; color filter is arranged on an array substrate) substrate.
  • the first substrate is a color filter substrate and the second substrate is an array substrate as an example.
  • the liquid crystal module in this embodiment may be a display module with a touch function.
  • the liquid crystal module may be a self-capacitive touch module or a mutual-capacitive touch module.
  • an embodiment of the present disclosure provides a touch panel with fingerprint recognition function, which includes a liquid crystal module 1 and a fingerprint recognition substrate on the light emitting surface side of the liquid crystal module 1; wherein the fingerprint recognition substrate includes : A first substrate 21, a plurality of fingerprint identification units 22 arranged on the first substrate 21; each fingerprint identification unit 22 includes a driving electrode 221 and a sensing electrode 222 arranged side by side on the first substrate 21; the driving electrode 221 is used for The driving signal is received; the sensing electrode 222 is used to sense the change in capacitance between it and the driving electrode 221 during the fingerprint identification stage for fingerprint identification.
  • the touch panel of this embodiment has a fingerprint recognition substrate arranged on the light-emitting surface side of the liquid crystal module 1, and the touch unit in the fingerprint recognition substrate includes a driving electrode 221 and a sensing electrode 222 arranged side by side, in this way, when there is When a touch body (such as a finger) touches the touch panel, in the fingerprint recognition phase, the drive signal output to each drive electrode 221 will be coupled to the corresponding sensing electrode 222 via the valley and ridge of the finger fingerprint. Change, at this time, by detecting the change in charge between the driving electrode 221 and the sensing electrode 222, that is, the capacitance change, the fingerprint information can be determined to complete the fingerprint identification.
  • a touch body such as a finger
  • the fingerprint recognition substrate not only includes the above structure, but also includes multiple scan lines 7 and multiple read lines 8, and multiple scan lines 7 and multiple read lines 8 are intersected and define a fingerprint recognition unit 22; At this time, the driving electrodes 221 in the fingerprint identification units 22 located in the same row are connected to the same scan line 7, and the sensing electrodes 222 in the fingerprint identification units 22 located in the same column are connected to the same reading line 8.
  • the scan line 7 can be inputted a drive signal row by row, and the amount of charge sensed on the sensing electrode 222 can be read through the reading line 8, so that the fingerprint recognition chip 61 can sense the amount of charge on the sensing electrode 222.
  • the amount of charge change determines the capacitance between the drive electrode 221 and the sensing electrode 222 of the fingerprint identification unit 22 to identify the fingerprint information.
  • the fingerprint recognition substrate in this embodiment also includes a flexible circuit board 6, and a fingerprint recognition chip 61 is provided on the flexible circuit board 6; the scanning line and the reading line are bound and connected with the flexible circuit board 6 to enable scanning
  • the line 7 and the reading line 8 are electrically connected to the fingerprint identification chip 61.
  • the flexible circuit board 6 may be arranged in the peripheral area outside the touch area of the display panel, for example, the orthographic projection of the fingerprint recognition substrate on the liquid crystal module and the fingerprint recognition chip on the liquid crystal module The orthographic projections do not overlap.
  • a first connection pad should be provided on the first substrate 21, and the first connection pad is connected to its corresponding scan line and read line, and a second connection pad is provided on the flexible circuit board 6.
  • the second connection pad is connected to the pin of the fingerprint identification chip 61 through the signal connection line; at this time, the scanning line, the reading line and the fingerprint identification can be completed by binding and connecting the first connection pad and the second connection pad The electrical connection of the chip 61.
  • the fingerprint identification chip 61 can integrate an image processing unit and an image comparison unit; the image processing unit can determine the fingerprint information according to the amount of charge change induced on the sensing electrode 222 of the line read by the reading line, and then the fingerprint The information is input to the image comparison unit, and the image comparison unit compares the fingerprint information with the pre-stored standard fingerprint information, and outputs the comparison result to the central processing unit of the touch panel to control the touch panel according to the comparison Perform the corresponding instructions on the result. For example, when fingerprint information is matched, the unlocking function of the touch display panel can be realized.
  • the resolution range of the fingerprint recognition substrate in this embodiment may be 200 ppi to 400 ppi.
  • the area of each fingerprint identification unit 22 may be 80 ⁇ m to 200 ⁇ m.
  • the total area of all the fingerprint identification units 22 may be 4 mm ⁇ 4 mm-10 mm ⁇ 10 mm, and specifically may be 8 mm ⁇ 8 mm.
  • the total area of the fingerprint identification unit 22 given in this embodiment is relatively large compared to related technologies, so the resolution of the fingerprint identification substrate can be relatively reduced. In this case, the area of each fingerprint identification unit 22 can be increased. In this way, the penetration thickness of the fingerprint identification unit 22 can be increased to 0.4 mm or more, thereby greatly improving the accuracy of fingerprint identification.
  • the resolutions on the fingerprint recognition substrate, the size (for example, length) of the fingerprint recognition unit 22, and the matrix size matching settings of the fingerprint recognition unit 22 (each column is a group) are given below, as shown in Table 1.
  • the material of the first substrate 21 in this embodiment includes glass, that is, a glass substrate. Compared with the silicon-based substrate in the fingerprint identification substrate in the related art, the glass substrate in this embodiment has a lower cost.
  • the fingerprint recognition substrate in this embodiment can be connected to the display module 1 through the first connection layer 3.
  • the first substrate in the fingerprint recognition substrate and the first base substrate of the color filter substrate in the liquid crystal module 1 are connected together by the first connection layer 3; wherein, the material of the first connection layer 3 includes transparent optical conductive Any one of glue (OCA), optical liquid glue (OCR), and frame glue.
  • OCA transparent optical conductive Any one of glue
  • OCR optical liquid glue
  • frame glue any one of glue
  • other transparent adhesives can also be used to connect the first base substrate and the first base 21 to complete the connection between the fingerprint identification substrate and the display module.
  • the first base substrate of the color filter substrate of the liquid crystal module 1 can be multiplexed as the first base 21, that is, the first base substrate of the color filter substrate is a part of the color filter layer that is away from the color filter layer.
  • the fingerprint recognition unit 22 is formed on the side. In this way, it helps to make the touch panel thinner.
  • the touch panel in this embodiment not only includes the above structure, but also includes a cover plate 4 provided on the side of the fingerprint identification unit 22 away from the first substrate 21.
  • the liquid crystal display device usually includes an upper polarizer on the light-emitting surface side of the liquid crystal module 1.
  • the upper polarizer is multiplexed as the cover plate 4.
  • the fingerprint identification unit 22 is composed of driving electrodes 221 and sensing electrodes 222 arranged side by side between the first substrate 21 and the cover 4, and the fingerprint identification unit 22 of this structure is worn Since it has a large thickness, a thicker upper polarizer can be used as the cover plate 4.
  • the cover plate 4 can be connected to the fingerprint recognition substrate through the second connection layer 5; wherein, the material of the second connection layer 5 includes transparent optical conductive adhesive (OCA), optical liquid glue (OCR), and sealant Any of them.
  • OCA transparent optical conductive adhesive
  • OCR optical liquid glue
  • sealant any of them.
  • other transparent adhesives can also be used to connect the cover plate 4 and the fingerprint identification substrate together.
  • the fingerprint recognition unit (touch sensor) is separated from the fingerprint recognition chip, so that the recognition area of the fingerprint recognition unit can be increased, and a large recognition penetration thickness can be realized, and the area of the fingerprint recognition chip It can be significantly reduced, reducing costs.
  • An embodiment of the present disclosure provides a display device, which includes the fingerprint recognition touch panel in the foregoing embodiment, and therefore, the display device can realize a fingerprint recognition function.
  • the display device can be any product or component with display function such as liquid crystal panel, electronic paper, OLED panel, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, navigator, etc.
  • the fingerprint recognition unit (touch sensor) is separated from the fingerprint recognition chip, so that the recognition area of the fingerprint recognition unit can be increased, and a large recognition penetration thickness can be realized. It can be significantly reduced, reducing costs.
  • An embodiment of the present disclosure provides a method for manufacturing a touch panel with fingerprint recognition function, wherein the touch panel with fingerprint recognition function is the touch panel in the above embodiment, referring to FIGS. 1 and 3,
  • the manufacturing method includes:
  • a fingerprint recognition substrate is formed on the light emitting surface side of the liquid crystal module 1;
  • the fingerprint identification substrate and the fingerprint identification chip are electrically connected through a signal line, wherein the orthographic projection of the fingerprint identification substrate on the liquid crystal module and the orthographic projection of the fingerprint identification chip on the liquid crystal module do not overlap .
  • the fingerprint recognition substrate includes: a first substrate 21; a plurality of fingerprint recognition units 22, wherein
  • Forming a fingerprint recognition substrate on the light emitting surface side of the liquid crystal module 1 further includes:
  • a first substrate 21 is formed on the light emitting surface side of the liquid crystal module 1;
  • each fingerprint recognition unit 22 includes a driving electrode 221 and a sensing electrode 222 arranged side by side.
  • the fingerprint identification substrate further includes: a plurality of scan lines 7 and a plurality of read lines 8; the scan lines 7 and the read lines 8 are intersected to define the fingerprint identification unit, and the manufacturing method further includes:
  • the plurality of scanning lines 7 and the plurality of reading lines 8 are formed on the surface of the first substrate 21 away from the liquid crystal module, wherein:
  • the driving electrodes in the fingerprint identification units located in the same row are connected to the same scan line 7;
  • the sensing electrodes in the fingerprint identification units located in the same column are connected to the same reading line 8.
  • the manufacturing method further includes: electrically connecting the scan line 7 and the read line 8 to the fingerprint identification chip.
  • the manufacturing method further includes: forming a cover plate 4 on a side of the fingerprint recognition unit away from the first base 21, wherein the cover plate 4 is connected to the fingerprint recognition substrate through the second connection layer 5 connection.
  • the fingerprint recognition unit (touch sensor) is separated from the fingerprint recognition chip, so that the recognition area of the fingerprint recognition unit can be increased, and a large recognition penetration thickness can be realized.
  • the area of the fingerprint identification chip can be greatly reduced, reducing the cost.

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Abstract

一种指纹识别触控显示面板及显示装置，该指纹识别触控面板，包括：指纹识别基板，位于液晶模组（1）的出光面一侧；以及指纹识别芯片（61），被配置为与所述指纹识别基板电连接，用于根据所述指纹识别基板的检测信号识别指纹信息，其中，所述指纹识别基板在所述液晶模组（1）上的正投影与所述指纹识别芯片（61）在所述液晶模组（1）上的正投影不重叠。

Description

指纹识别触控面板及其制造方法、显示装置
相关申请的交叉引用
本申请要求于2019年6月14日在中国知识产权局提交的申请号为No.201910515710.0的中国专利申请的优先权，该中国专利申请的全部内容通过引用合并于此。
技术领域
本公开属于显示技术领域，具体涉及指纹识别触控面板及其制造方法、显示装置。
背景技术
随着多媒体技术的发展，智能手机、平板电脑等便携式电子装置已经成为了人们生活中必备的工具，其中经常储存有使用者的重要个人信息。因此，这类产品在使用中有必要设置一定的身份认证和权限管理措施，对其中储存的信息加以保护，以防止使用者的个人信息被不慎泄露或盗取。
在相关技术中的身份认证方法中，指纹识别(Fingerprint Identification)是一种较为先进，且得到广泛应用的方法。由于每个人的指纹都是独一无二的，因此，指纹识别认证方法的安全性很高，并且使用起来也很方便。
发明内容
本公开的一个实施例提供了一种指纹识别触控面板，包括：显示模组；指纹识别基板，位于所述显示模组的出光面一侧；以及指纹识别芯片，被配置为与所述指纹识别基板电连接，用于根据所述指纹识别基板的检测信号识别指纹信息，其中，所述指纹识别基板在所述液晶模组上的正投影与所述指纹识别芯片在所述液晶模组上的正投影不重叠。
在一些实施例中，所述指纹识别基板包括：第一基底；和位 于所述第一基底上的多个指纹识别单元，每个所述指纹识别单元包括：并排设置的驱动电极和感应电极。所述驱动电极用于接收驱动信号。所述感应电极用于在指纹识别阶段感应其与所述驱动电极之间的电容变化作为所述检测信号。
在一些实施例中，所述指纹识别基板还包括：多条扫描线和多条读取线；所述扫描线和所述读取线交叉设置限定出所述指纹识别单元；其中，
位于同一行的指纹识别单元中的所述驱动电极连接同一条所述扫描线；
位于同一列的指纹识别单元中的所述感应电极连接同一条读取线。
在一些实施例中，所述指纹识别基板还包括：柔性线路板；，所述指纹识别芯片位于所述柔性线路板上，其中，所述多条扫描线和所述多条读取线与所述柔性线路板绑定连接，以使所述多条扫描线和所述多条读取线与所述指纹识别芯片电连接。
在一些实施例中，所述指纹识别基板的分辨率为200ppi至400ppi。
在一些实施例中，每个所述指纹识别单元的面积为80μm至200μm。
在一些实施例中，各个所述指纹识别单元的总面积为4mm×4mm至10mm×10mm。
在一些实施例中，所述第一基底材料包括玻璃。
在一些实施例中，所述显示模组包括相对设置的第一基板和第二基板；其中，所述第一基板包括：第一衬底基板；其中，
所述第一衬底基板用作所述第一基底。
在一些实施例中，所述显示模组包括相对设置的第一基板和第二基板；其中，所述第一基板包括：第一衬底基板；其中，
所述第一衬底基板与所述第一基底通过第一连接层连接。
在一些实施例中，所述第一连接层的材料包括：透明光学导电胶、光学液体胶水、框胶中的任意一种。
在一些实施例中，所述指纹识别触控面板还包括：盖板，位于所述指纹识别基板的背离所述显示模组的一侧。
在一些实施例中，所述指纹识别触控面板还包括：位于所述显示模组出光面侧的上偏光片；其中，所述上偏光片用作所述盖板。
在一些实施例中，所述盖板通过第二连接层与所述指纹识别基板连接。
在一些实施例中，所述第二连接层的材料包括：透明光学导电胶、光学液体胶水、框胶中的任意一种。
在一些实施例中，所述显示模组包括液晶模组。
本公开的一个实施例提供了一种显示装置，其包括上述的指纹识别触控面板。
本公开的一个实施例提供了一种制造上述具有指纹识别功能的触控面板的方法，该方法包括：
在显示模组的出光面侧形成指纹识别基板；
将所述指纹识别基板与指纹识别芯片电连接。
在一些实施例中，所述指纹识别基板包括：第一基底；多个指纹识别单元，在显示模组的出光面侧形成指纹识别基板进一步包括：
在显示模组的出光面侧形成第一基底；
在所述第一基底的远离所有显示模组的表面上形成所述多个指纹识别单元，其中，每个指纹识别单元包括并排设置的驱动电极和感应电极。
在一些实施例中，所述指纹识别基板还包括：多条扫描线和多条读取线；所述多条扫描线和所述多条读取线交叉设置限定出各所述指纹识别单元，所述方法还包括：
在所述第一基底的远离所述显示模组的表面上形成所述多条扫描线和多条读取线，其中，
位于同一行的所述指纹识别单元中的所述驱动电极连接同一条所述扫描线；
位于同一列的所述指纹识别单元中的所述感应电极连接同一条读取线。
在一些实施例中，上述方法还包括：将所述多条扫描线和所述多条读取线与所述指纹识别芯片电连接。
附图说明
图1为根据本公开的一个实施例的指纹识别触控面板的结构示意图；
图2为根据本公开的一个实施例的指纹识别单元的排布示意图。
图3为根据本公开的一个实施例的制造指纹识别触控面板的流程图。
具体实施方式
为使本领域技术人员更好地理解本公开的技术方案，下面结合附图和具体实施方式对本公开作进一步详细描述。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”、“一”或者“该”等类似词语也不表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
本公开的一个实施例提供了一种具有指纹识别功能的触控面 板，其包括显示模组和位于显示模组出光面侧的指纹识别基板；其中，显示模组可以是液晶模组，也可以是有机电致发光二极管显示模组，在下述具体本实施例中主要是以显示模组为液晶模组为例进行说明的。
对于液晶模组其具体可以包括相对设置的第一基板和第二基板；其中，第一基板可以为彩膜基板，第二基板则为阵列基板；当然，第一基板可以为对盒基板，第二基板则为COA(Color On Array；彩膜设置在阵列基板上)基板，在下述具体实施例中是以第一基板为彩膜基板，第二基板为阵列基板为例进行说明的。
当然，本实施例中的液晶模组可以为具有触控功能的显示模组，例如，液晶模组可以是自容式触控模组，也可以是互容式触控模组。
如图1所示，本公开的一个实施例提供了一种具有指纹识别功能的触控面板，包括液晶模组1和位于液晶模组1出光面侧的指纹识别基板；其中，指纹识别基板包括：第一基底21，设置在第一基底21上的多个指纹识别单元22；每个指纹识别单元22包括并排设置在第一基底21上的驱动电极221和感应电极222；驱动电极221用于接收驱动信号；感应电极222则用于在指纹识别阶段感测其与驱动电极221之间的电容变化，以供进行指纹识别。
由于本实施的触控面板中具有设置在液晶模组1出光面侧的指纹识别基板，且指纹识别基板中的触控单元包括并排设置的驱动电极221和感应电极222，这样一来，当有触控体(例如手指)触摸到该触控面板时，在指纹识别阶段，给各个驱动电极221输出的驱动信号，经由手指指纹的谷和脊耦合至对应的感应电极222上的信号将会发生改变，此时通过检测驱动电极221和感应电极222之间的电荷变化量，也即电容变化，就可以确定出指纹信息，以完成对指纹的识别。
如图2所示，指纹识别基板不仅包括上述结构，还包括多条扫描线7和多条读取线8，且多条扫描线7和多条读取线8交叉设 置并限定出指纹识别单元22；此时，位于同一行的指纹识别单元22中的驱动电极221连接同一扫描线7，位于同一列的指纹识别单元22中的感应电极222连接同一条读取线8。
具体的，在指纹识别阶段，可以通过逐行给扫描线7输入驱动信号，通过读取线8读取感应电极222上所感应的电荷量，以供指纹识别芯片61根据感应电极222所感应的电荷变化量，判断指纹识别单元22的驱动电极221和感应电极222之间的电容大小，以对指纹信息进行识别。
进一步的，本实施例中的指纹识别基板还包括柔性线路板6，且在柔性线路板6上设置有指纹识别芯片61；扫描线和读取线与柔性线路板6绑定连接，以使扫描线7和读取线8与指纹识别芯片61电连接。柔性线路板6可以设置在显示面板的触控区域之外的周边区域内，例如，所述指纹识别基板在所述液晶模组上的正投影与所述指纹识别芯片在所述液晶模组上的正投影不重叠。
具体的，在第一基底21上应当设置有第一连接焊盘，该第一连接焊盘与之对应的扫描线和读取线连接，在柔性线路板6上设置有第二连接焊盘，第二连接焊盘通过信号连接线与指纹识别芯片61的管脚连接；此时，则可以通过将第一连接焊盘和第二连接焊盘绑定连接完成扫描线、读取线与指纹识别芯片61的电连接。
在指纹识别芯片61中可以集成图像处理单元和图像比对单元；图像处理单元可以根据读取线所读取线的感应电极222上所感应的电荷变化量，确定出指纹信息，之后将该指纹信息输入至图像比对单元，图像比对单元则将该指纹信息与其内预先存储的标准指纹信息进行比对，将比对结果输出给触控面板的中央处理器，以控制触控面板根据比对结果执行相应的指令。例如，在指纹信息匹配时，可以实现触摸显示面板的解锁功能。
其中，在本实施例中指纹识别基板的分辨率范围可以是200ppi～400ppi。每个指纹识别单元22的面积可以是80μm～200μm。全部所述指纹识别单元22的总面积可以是4mm×4mm～10mm×10mm，具体可以是8mm×8mm。本实施例中给出的指纹识别单元 22的总面积相对相关技术而言较大，因此可以将指纹识别基板的分辨率相对降低，此时，则可以将每个指纹识别单元22的面积做大，这样一来，可以使得指纹识别单元22的穿透厚度达到0.4mm以上，从而大大提高了指纹识别的精度。以下给出了几种指纹识别基板上的分辨率、指纹识别单元22的尺寸大小(例如，长度)、指纹识别单元22的矩阵大小匹配设置(每一列为一组)，如表一所示。
分辨率 127ppi 200ppi 142ppi 250ppi 170ppi 300ppi
尺寸大小 200μm 127μm 178.5μm 101.6μm 150μm 84.66μm
矩阵大小 20×20 32×32 23×23 40×40 27×27 48×48
表一
其中，本实施例中的第一基底21的材料包括玻璃，也即玻璃基底。与相关技术中的指纹识别基板中的硅基基底相比，本实施例中的玻璃基底成本较低。
其中，本实施例中的指纹识别基板可以通过第一连接层3与显示模组1连接在一起。
具体的，指纹识别基板中的第一基板和液晶模组1中的彩膜基板的第一衬底基板通过第一连接层3连接在一起；其中，第一连接层3的材料包括透明光学导电胶(OCA)、光学液体胶水(OCR)、框胶中的任意一种。当然，也可以采用其它透明粘结剂将第一衬底基板和第一基底21连接，以完成指纹识别基板和显示模组的连接。
当然，在一些实施例中，液晶模组1的彩膜基板中的第一衬底基板可以复用为第一基底21，也即在彩膜基板的第一衬底基板背离彩膜层的一侧形成指纹识别单元22。这样一来，有助于触控面板的轻薄化。
其中，在本实施例的触控面板不仅包括上述结构，还包括设置在指纹识别单元22背离第一基底21一侧的盖板4。
在一些实施例中，对于液晶显示装置而言通常包括位于液晶模组1的出光面侧的上偏光片，在本实施例中将上偏光片复用为 盖板4。之所以如此设置是因为：在本实施例中指纹识别单元22采用并排设置在第一基底21和盖板4之间的驱动电极221和感应电极222构成，该种结构的指纹识别单元22的穿透较大厚度，因此可以采用较厚的上偏光片作为盖板4。
其中，在本实施例中盖板4可以通过第二连接层5与指纹识别基板连接；其中，第二连接层5的材料包括透明光学导电胶(OCA)、光学液体胶水(OCR)、框胶中的任意一种。当然，也可以采用其它透明粘结剂将盖板4与指纹识别基板连接在一起。
在该实施例的触控面板中，将指纹识别单元(触控传感器)与指纹识别芯片分离，使得可以增加指纹识别单元的识别面积，实现大的识别穿透厚度，同时使得指纹识别芯片的面积可以大幅缩小，降低了成本。
本公开的一个实施例提供了一种显示装置，其包括前述实施例中的指纹识别触控面板，因此，该显示装置可以实现指纹识别功能。
该显示装置可以为：液晶面板、电子纸、OLED面板、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
在该实施例中的显示装置中，将指纹识别单元(触控传感器)与指纹识别芯片分离，使得可以增加指纹识别单元的识别面积，实现大的识别穿透厚度，同时使得指纹识别芯片的面积可以大幅缩小，降低了成本。
本公开的一个实施例提供了一种具有指纹识别功能的触控面板的制造方法，其中所述具有指纹识别功能的触控面板为上述实施例中的触控面板，参照图1和图3，所述制造方法包括：
在液晶模组1的出光面侧形成指纹识别基板；
通过信号线将所述指纹识别基板与指纹识别芯片电连接，其中所述指纹识别基板在所述液晶模组上的正投影与所述指纹识别芯片在所述液晶模组上的正投影不重叠。
在一些实施例中，所述指纹识别基板包括：第一基底21；多 个指纹识别单元22，其中
在液晶模组1的出光面侧形成指纹识别基板进一步包括：
在液晶模组1的出光面侧形成第一基底21；
在所述第一基底21的远离所有液晶模组1的表面上形成所述多个指纹识别单元22，其中，每个指纹识别单元22包括并排设置的驱动电极221和感应电极222。
所述指纹识别基板还包括：多条扫描线7和多条读取线8；所述扫描线7和所述读取线8交叉设置限定出所述指纹识别单元，所述制造方法还包括：
在所述第一基底21的远离所述液晶模组的表面上形成所述多条扫描线7和多条读取线8，其中，
位于同一行的所述指纹识别单元中的所述驱动电极连接同一条所述扫描线7；
位于同一列的所述指纹识别单元中的所述感应电极连接同一条读取线8。
所述制造方法还包括：将所述扫描线7和所述读取线8与所述指纹识别芯片电连接。
在一些实施例中，所述制造方法还包括：在所述指纹识别单元的远离所述第一基底21的一侧形成盖板4，其中，盖板4通过第二连接层5与指纹识别基板连接。
在通过实施例中的制造方法制造的触控面板中，将指纹识别单元(触控传感器)与指纹识别芯片分离，使得可以增加指纹识别单元的识别面积，实现大的识别穿透厚度，同时使得指纹识别芯片的面积可以大幅缩小，降低了成本。
可以理解的是，以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式，然而本公开并不局限于此。对于本领域内的普通技术人员而言，在不脱离本公开的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本公开的保护范围。

Claims (21)

  1. 一种指纹识别触控面板，包括：
    显示模组；
    指纹识别基板，位于所述显示模组的出光面一侧；以及
    指纹识别芯片，被配置为与所述指纹识别基板电连接，用于根据所述指纹识别基板的检测信号识别指纹信息，
    其中，所述指纹识别基板在所述液晶模组上的正投影与所述指纹识别芯片在所述液晶模组上的正投影不重叠。
  2. 根据权利要求1所述的指纹识别触控面板，其中，所述指纹识别基板包括：第一基底；和位于所述第一基底上的多个指纹识别单元，每个所述指纹识别单元包括：并排设置的驱动电极和感应电极；
    所述驱动电极用于接收驱动信号；
    所述感应电极用于在指纹识别阶段感应其与所述驱动电极之间的电容变化作为所述检测信号。
  3. 根据权利要求2所述的指纹识别触控面板，其中，所述指纹识别基板还包括：多条扫描线和多条读取线；所述多条扫描线和所述多条读取线交叉设置限定出各所述指纹识别单元；其中，
    位于同一行的指纹识别单元中的所述驱动电极连接同一条扫描线；
    位于同一列的指纹识别单元中的所述感应电极连接同一条读取线。
  4. 根据权利要求3所述的指纹识别触控面板，其中，所述指纹识别基板还包括：柔性线路板，所述指纹识别芯片位于所述柔性线路板上，并且其中，
    所述多条扫描线和所述多条读取线与所述柔性线路板绑定连 接，以使所述多条扫描线和所述多条读取线与所述指纹识别芯片电连接。
  5. 根据权利要求1所述的指纹识别触控面板，其中，所述指纹识别基板的分辨率为200ppi至400ppi。
  6. 根据权利要求1所述的指纹识别触控面板，其中，每个所述指纹识别单元的面积为80μm至200μm。
  7. 根据权利要求1所述的指纹识别触控面板，其中，各个所述指纹识别单元的总面积为4mm×4mm至10mm×10mm。
  8. 根据权利要求1所述的指纹识别触控面板，其中，所述第一基底材料包括玻璃。
  9. 根据权利要求2所述的指纹识别触控面板，其中，所述显示模组包括相对设置的第一基板和第二基板；其中，所述第一基板包括：第一衬底基板；其中，
    所述第一衬底基板用作所述第一基底。
  10. 根据权利要求2所述的指纹识别触控面板，其中，所述显示模组包括相对设置的第一基板和第二基板；其中，所述第一基板包括：第一衬底基板；其中，
    所述第一衬底基板与所述第一基底通过第一连接层连接。
  11. 根据权利要求10所述的指纹识别触控面板，其中，所述第一连接层的材料包括：透明光学导电胶、光学液体胶水、框胶中的任意一种。
  12. 根据权利要求1所述的指纹识别触控面板，其中，所述 指纹识别触控面板还包括：盖板，位于所述指纹识别基板的背离所述显示模组的一侧。
  13. 根据权利要求12所述的指纹识别触控面板，其中，所述指纹识别触控面板还包括：位于所述显示模组出光面侧的上偏光片；其中，
    所述上偏光片用作所述盖板。
  14. 根据权利要求12所述的指纹识别触控面板，其中，所述盖板通过第二连接层与所述指纹识别基板连接。
  15. 根据权利要求14所述的指纹识别触控面板，其中，所述第二连接层的材料包括：透明光学导电胶、光学液体胶水、框胶中的任意一种。
  16. 根据权利要求1所述的指纹识别触控面板，其中，所述显示模组包括液晶模组。
  17. 一种显示装置，其中，包括权利要求1-16中任一项所述的指纹识别触控面板。
  18. 一种制造根据权利要求1所述的具有指纹识别功能的触控面板的方法，包括：
    在显示模组的出光面侧形成指纹识别基板；
    将所述指纹识别基板与指纹识别芯片电连接。
  19. 根据权利要求18所述的方法，其中，所述指纹识别基板包括：第一基底；多个指纹识别单元，
    在显示模组的出光面侧形成指纹识别基板进一步包括：
    在显示模组的出光面侧形成第一基底；
    在所述第一基底的远离所有显示模组的表面上形成所述多个指纹识别单元，其中，每个指纹识别单元包括并排设置的驱动电极和感应电极。
  20. 根据权利要求19所述的方法，其中，所述指纹识别基板还包括：多条扫描线和多条读取线；所述多条扫描线和所述多条读取线交叉设置限定出各所述指纹识别单元，所述方法还包括：
    在所述第一基底的远离所述显示模组的表面上形成所述多条扫描线和多条读取线，其中，
    位于同一行的所述指纹识别单元中的所述驱动电极连接同一条所述扫描线；
    位于同一列的所述指纹识别单元中的所述感应电极连接同一条读取线。
  21. 根据权利要求20所述的方法，还包括：将所述多条扫描线和所述多条读取线与所述指纹识别芯片电连接。
PCT/CN2020/094901 2019-06-14 2020-06-08 指纹识别触控面板及其制造方法、显示装置 WO2020248934A1 (zh)

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