WO2018126515A1 - 显示屏及电子装置 - Google Patents

显示屏及电子装置 Download PDF

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Publication number
WO2018126515A1
WO2018126515A1 PCT/CN2017/073883 CN2017073883W WO2018126515A1 WO 2018126515 A1 WO2018126515 A1 WO 2018126515A1 CN 2017073883 W CN2017073883 W CN 2017073883W WO 2018126515 A1 WO2018126515 A1 WO 2018126515A1
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Prior art keywords
sub
fingerprint recognition
pixel
display screen
electrode
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PCT/CN2017/073883
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English (en)
French (fr)
Inventor
黄耀立
张红森
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武汉华星光电技术有限公司
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Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to EP17890298.7A priority Critical patent/EP3567517A4/en
Priority to JP2019537141A priority patent/JP6947828B2/ja
Priority to US15/511,017 priority patent/US10353235B2/en
Priority to KR1020197023082A priority patent/KR102315677B1/ko
Publication of WO2018126515A1 publication Critical patent/WO2018126515A1/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
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/17—Image acquisition using hand-held instruments
    • 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
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/1343—Electrodes

Definitions

  • the present invention relates to the field of fingerprint recognition technologies, and in particular, to a display screen and an electronic device.
  • fingerprint recognition technology has the characteristics of universality, uniqueness, security, collectability and acceptability.
  • Fingerprint recognition is an authentication technique that determines the identity by comparing multiple global features and local detail features between different fingerprint images according to the characteristics that different fingerprints have different textures. Most fingerprint recognition does not directly store the fingerprint image, but uses a digital fingerprint recognition algorithm to find the characteristics of the fingerprint. According to different fingerprint collection methods, fingerprint recognition is mainly divided into three types: optical, capacitive and ultrasonic. As the most mature and inexpensive identification technology in biometric technology, fingerprint recognition is not only widely used in access control and attendance systems. With the development of technology, consumer electronic products such as smart phones and tablet computers also have pattern recognition. Features.
  • the traditional optical fingerprint recognition technology is that the finger is projected by a built-in light source and projected onto a Charge Coupled Device (CCD) by a prism to form a black and white ridge and valley line, which can be processed by the fingerprint device algorithm.
  • CCD Charge Coupled Device
  • Multi-gradation fingerprint image but due to the optical path requirements and large device size, it is not suitable for widespread application in people's daily life.
  • capacitive fingerprint recognition technology has been widely used due to its small size.
  • the principle of capacitive fingerprint recognition technology is to use human fingers as an electrode of a capacitor, fingerprint sensor.
  • Sensor is another electrode, which uses the capacitance difference formed between the ridges and valleys of the finger fingerprints relative to the smooth fingerprint sensor to form a grayscale image, and then uses the fingerprint algorithm to match the global and local details of the fingerprint to realize the fingerprint recognition function.
  • IPS In-Plane Switching
  • the touch sensor can be used to integrate fingerprint recognition into the visible area (ie, touch, display, and fingerprint recognition functions) through fingerprint recognition and display time-sharing.
  • display products with low resolution and no in-cell touch function such as small-size visual fingerprint reader, home TV with fingerprint recognition function, car display, etc., the same method cannot be used. Integrate fingerprint recognition into the viewable area.
  • the object of the present invention is to provide a display screen, which can integrate the fingerprint recognition function into a display area with low resolution and no touch function, and can realize multi-block fingerprint recognition of the whole screen without time-sharing scanning, and improve the fingerprint.
  • the recognition accuracy increases the diversity of fingerprint recognition applications, improves the cost performance of traditional display products, and enhances the user experience.
  • Another object of the present invention is to provide an electronic device, wherein the display screen can integrate the fingerprint recognition function into a display area with low resolution and no touch function, and can realize multi-block fingerprint of the whole screen without time-sharing scanning. Identification, improve fingerprint recognition accuracy, increase the diversity of fingerprint recognition applications, improve the cost performance of traditional display products, and enhance the user experience.
  • the present invention firstly provides a display panel including a TFT array substrate, a CF substrate disposed opposite to the TFT array substrate, and a liquid crystal layer interposed between the TFT array substrate and the CF substrate; the TFT array substrate a pixel electrode layer, and a plurality of fingerprint identification signal lines, wherein the pixel electrode layer and the plurality of fingerprint identification signal lines are interposed with an interlayer insulating layer; the CF substrate comprises a black matrix layer;
  • the display screen has an effective display area, the effective display area includes a plurality of pixel units, each of the pixel units includes a plurality of sub-pixel units; and one or more fingerprint recognition blocks are disposed in the effective display area;
  • a pixel electrode layer corresponding to each sub-pixel unit includes a sub-pixel electrode and a fingerprint recognition electrode separated from the sub-pixel electrode;
  • a black matrix layer corresponding to each sub-pixel unit includes a cover a black border around the edge of the sub-pixel electrode and a black solid block completely covering the fingerprint recognition electrode;
  • the fingerprint identification signal line contacts the fingerprint recognition electrode, and electrically connects the fingerprint recognition electrode to the display and fingerprint identification integrated chip.
  • the fingerprint identification signal line contacts the fingerprint recognition electrode via a via hole penetrating the interlayer insulating layer, and electrically connects the fingerprint recognition electrode to the display and fingerprint identification integrated chip.
  • the material of the fingerprint identification signal line is metal.
  • the material of the pixel electrode layer is indium tin oxide.
  • the fingerprint identification block has a rectangular shape with a side length of 4 mm to 5.5 mm.
  • the pixel electrode layer corresponding to each sub-pixel unit includes only sub-pixel electrodes; the black matrix layer corresponding to each sub-pixel unit includes only a black border covering the peripheral edges of the sub-pixel electrodes.
  • the sub-pixel unit is a red sub-pixel unit, a green sub-pixel unit, or a blue sub-pixel unit.
  • the present invention also provides an electronic device comprising the above display screen.
  • the present invention also provides a display panel including a TFT array substrate, a CF substrate disposed opposite to the TFT array substrate, and a liquid crystal layer interposed between the TFT array substrate and the CF substrate;
  • the TFT array substrate includes a pixel electrode layer, And a plurality of fingerprint identification signal lines, wherein the pixel electrode layer and the plurality of fingerprint identification signal lines are interposed with an interlayer insulating layer;
  • the CF substrate comprises a black matrix layer;
  • the display screen has an effective display area, the effective display area includes a plurality of pixel units, each of the pixel units includes a plurality of sub-pixel units; and one or more fingerprint recognition blocks are disposed in the effective display area;
  • a pixel electrode layer corresponding to each sub-pixel unit includes a sub-pixel electrode and a fingerprint recognition electrode separated from the sub-pixel electrode;
  • a black matrix layer corresponding to each sub-pixel unit includes a cover a black border around the edge of the sub-pixel electrode, and a black solid block completely covering the fingerprint recognition electrode;
  • the fingerprint identification signal line contacts the fingerprint recognition electrode, and electrically connects the fingerprint recognition electrode to the display and fingerprint identification integrated chip;
  • the fingerprint identification signal line contacts the fingerprint recognition electrode via a via penetrating through the interlayer insulating layer, and electrically connects the fingerprint recognition electrode to the display and fingerprint identification integrated chip;
  • the material of the fingerprint identification signal line is metal.
  • the present invention provides a display screen and an electronic device, in which one or more fingerprint identification blocks are disposed in an effective display area, and in the fingerprint identification block: pixels corresponding to each sub-pixel unit
  • the electrode layer includes a sub-pixel electrode and a fingerprint recognition electrode separated from the sub-pixel electrode; a black matrix layer corresponding to each sub-pixel unit includes a black border covering the peripheral edge of the sub-pixel electrode, and completely covering the fingerprint recognition electrode.
  • the black real block; and the fingerprint identification signal line is in contact with the fingerprint recognition electrode, and the fingerprint recognition electrode is electrically connected to the display and fingerprint identification integrated chip, and the fingerprint recognition function can be integrated into the display area with low resolution and no touch function.
  • multi-block fingerprint recognition can be realized without time-sharing scanning, the fingerprint recognition accuracy is improved, the diversity of fingerprint recognition applications is increased, the cost performance of the traditional display products is improved, and the user experience is improved.
  • FIG. 1 is a schematic diagram showing the distribution of fingerprint identification blocks in a display screen of the present invention
  • FIG. 2 is a perspective view showing a pixel electrode layer and a black matrix layer in a fingerprint identification block of the display screen of the present invention
  • FIG. 3 is a schematic plan view showing a pixel electrode layer and a fingerprint identification signal line in a fingerprint recognition block in the display screen of the present invention
  • FIG. 4 is a schematic plan view of a pixel electrode layer and a black matrix layer corresponding to one sub-pixel unit in a fingerprint recognition block of a display screen of the present invention
  • Figure 5 is a cross-sectional view of the display screen of the present invention at B-B shown in Figure 3;
  • FIG. 6 is a schematic plan view showing a pixel electrode layer and a black matrix layer corresponding to one sub-pixel unit outside the fingerprint identification block of the display screen of the present invention.
  • the present invention provides a display screen.
  • the display screen includes a TFT array substrate 1, a CF substrate 2 disposed opposite to the TFT array substrate 1, and a liquid crystal layer 3 interposed between the TFT array substrate 1 and the CF substrate 2, and may further include The backlight module 6 provided on the lower side of the TFT array substrate 1 and the package cover 8 provided on the upper side of the CF substrate 2 are provided.
  • the display screen has an effective display area AA, the effective display area AA includes a plurality of pixel units P, each pixel unit P includes a plurality of sub-pixel units SP; and the effective display area AA is set.
  • the TFT array substrate 1 includes a pixel electrode layer 11 and a plurality of fingerprint identification signal lines 13.
  • An interlayer insulating layer 12 is interposed between the pixel electrode layer 11 and the plurality of fingerprint identification signal lines 13.
  • Below the pixel electrode layer 11, a conventional substrate layer, a gate layer, an active layer, a source/drain layer, and a plurality of insulating layers are exemplified, which is the same as the prior art and is omitted here.
  • the CF substrate 2 includes a black matrix layer 21, and further includes a conventional substrate layer, a color film layer, and the like.
  • the color film layer further includes red, green, and blue color resists, which is similar to the prior art and is omitted here.
  • the pixel electrode layer corresponding to each sub-pixel unit is a whole sub-pixel electrode, and the black matrix is a black border that only blocks the peripheral edges of the sub-pixel electrode.
  • the pixel electrode layer 11 corresponding to each sub-pixel unit SP includes a sub-pixel electrode 111 and a fingerprint recognition electrode separated from the sub-pixel electrode 111.
  • the black matrix layer 21 corresponding to each sub-pixel unit SP includes a black border 211 covering the peripheral edge of the sub-pixel electrode 111, and a black real block 212 completely covering the fingerprint recognition electrode 112; the fingerprint identification signal line 13 is in contact.
  • Fingerprint identification electrode 112 will fingerprint The identification electrode 112 is electrically connected to the display and fingerprint recognition integrated chip 9. Outside the fingerprint identification block 5: the pixel electrode layer 11 corresponding to each sub-pixel unit SP includes only the sub-pixel electrode 111; the black matrix layer 21 corresponding to each sub-pixel unit SP includes only the sub-pixel electrode A black border 211 around the edge of 111.
  • the sub-pixel electrode 111 in the fingerprint recognition block 5 is used for display, the fingerprint recognition electrode 112 is used for fingerprint recognition, the fingerprint identification signal line 13 is connected with the fingerprint recognition electrode 112, and the display and fingerprint identification integrated chip 9 is realized.
  • the fingerprint recognition function is integrated into the effective display area AA of the display.
  • the method of separately designing the sub-pixel electrode 111 and the fingerprint recognition electrode 112 is such that the display signal and the fingerprint identification signal do not interfere with each other, and it is not necessary to use time-sharing scanning, and does not crowd occupy the scanning time resources, but uses fingerprint recognition. Scanning and scanning separately can improve the scanning frequency and efficiency of fingerprint recognition, and allow the display to have high resolution and touch function.
  • the material of the pixel electrode layer 11 is preferably Indium Tin Oxide (ITO).
  • ITO Indium Tin Oxide
  • the ratio of the separation of the sub-pixel electrode 111 and the fingerprint recognition electrode 112 needs to make the area of the sub-pixel electrode 111 larger as much as possible to meet the requirement of fingerprint recognition detection, so as to reduce the pixel aperture ratio. loss.
  • the material of the fingerprint identification signal line 13 is preferably metal.
  • a process of depositing and patterning the metal layer is required, and a via 122 is formed on the interlayer insulating layer 12 corresponding to the fingerprint recognition electrode 112.
  • the fingerprint identification signal line 13 contacts the fingerprint recognition electrode 112 via the via 122 penetrating the interlayer insulating layer 12, and electrically connects the fingerprint recognition electrode 112 to the display and fingerprint identification integrated chip 9.
  • the specific number of the fingerprint identification block 5 is to satisfy the user's experience. For example, if five fingerprint identification blocks or ten fingerprint identification blocks are designed, fingerprint recognition of one-hand five-finger or two-hand ten fingers can be realized. The more the number of fingers detected at the same time, the higher the accuracy of fingerprint recognition and the higher the security of privacy protection.
  • the size of each fingerprint recognition block 5 is generally designed to be similar to the area touched by a human finger on the display screen, and has a rectangular shape with a side length of about 4 mm to 5.5 mm.
  • Each of the fingerprint identification blocks 5 may correspond to a plurality of pixel units P, which may be, but not limited to, three sub-pixel units including red, green, and blue, that is, the sub-pixel units SP may be red sub-pixels. A cell, a green sub-pixel cell, or a blue sub-pixel cell.
  • the number of fingerprint recognition electrodes 112 that need to be connected to the fingerprint identification signal line 13 in the fingerprint recognition block 5 can be determined according to the size of the single sub-pixel unit SP and the difficulty of the pull line.
  • the display and fingerprint identification integrated chip 9 has the functions of display and fingerprint recognition driving, which can save the cable space in the display screen and reduce the design complexity.
  • the working principle of the fingerprint recognition of the display screen of the present invention is that a plurality of fingerprint recognition electrodes 112 in the TFT array substrate 1 and the ridges and valleys of the finger fingerprint respectively form a capacitance, and the difference between the adjacent capacitances is used to form a fingerprint algorithm.
  • the multi-gray fingerprint image is identified, and then the local feature points of the finger fingerprint are detected, and finally the fingerprint recognition function is realized.
  • the present invention further provides an electronic device including the above display screen, which can integrate the fingerprint recognition function into a display area having low resolution and no touch function, and can be scanned without time division. Realize multi-block fingerprint recognition of the whole screen, improve fingerprint recognition accuracy, increase the diversity of fingerprint recognition applications, improve the cost performance of traditional display products, and enhance the user experience.
  • the display screen and the electronic device of the present invention have one or more fingerprint identification blocks in the effective display area, and in the fingerprint identification block: the pixel electrode layer corresponding to each sub-pixel unit includes a sub-pixel layer a pixel electrode, and a fingerprint recognition electrode separated from the sub-pixel electrode; a black matrix layer corresponding to each sub-pixel unit includes a black border covering the peripheral edge of the sub-pixel electrode, and a black solid block completely covering the fingerprint recognition electrode; And setting the fingerprint identification signal line to contact the fingerprint recognition electrode, electrically connecting the fingerprint recognition electrode to the display and fingerprint identification integrated chip, and integrating the fingerprint recognition function into the display area with low resolution and no touch function, without dividing Time scanning can realize multi-block fingerprint recognition of the whole screen, improve fingerprint recognition accuracy, increase the diversity of fingerprint recognition applications, improve the cost performance of traditional display products, and improve the user experience.

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Abstract

一种显示屏及电子装置。显示屏在有效显示区(AA)内设置一个或多个指纹识别区块(5)，在指纹识别区块(5)内：每一子像素单元(SP)对应的像素电极层(11)包括子像素电极(111)、及与子像素电极(111)分隔的指纹识别电极(112)；每一子像素单元(SP)对应的黑色矩阵层(21)包括遮盖子像素电极(111)四周边缘的黑色边框(211)、及完全遮盖指纹识别电极(112)的黑色实块(212)；并设置指纹识别信号线(13)接触指纹识别电极(112)，将指纹识别电极(112)电性连接至显示和指纹识别集成芯片(9)，能够将指纹识别功能集成于其解析度低且不含触控功能的显示区内，无需分时扫描即可实现整屏多区块指纹识别。

Description

显示屏及电子装置 技术领域
本发明涉及指纹识别技术领域，尤其涉及一种显示屏及电子装置。
背景技术
指纹识别技术作为生物识别技术中的一种，具有普遍性、唯一性、安全性、可采集性、可接受性等特点。指纹识别是根据不同指纹具有不同纹理的特性，将不同指纹图像之间的多个全局特征和局部细节特征进行对比，从而确定身份的一种认证技术。大部分指纹识别并不直接存储指纹图像，而是利用数字化的指纹识别算法找到比对指纹的特征。按照指纹的采集方式不同，指纹识别主要分为光学式、电容式和超声波式三类。作为目前生物识别技术中最成熟且价格便宜的一种识别技术，指纹识别不仅在门禁、考勤系统中应用广泛，随着技术的发展，智能手机、平板电脑等消费类电子产品也具备了纹识别功能。
传统的光学指纹识别技术是手指在内置光源照射下，用棱镜将其投射到电荷藕合器件(Charge Coupled Device，CCD)上，进而形成黑白相间的脊、谷线，即可被指纹设备算法处理的多灰度指纹图像，但是由于光程的要求、设备尺寸较大，不适合广泛应用到人们的日常生活中。随着智能手机、智能穿戴手表等消费品的普及，电容式指纹识别技术因其体积较小而得到了广泛的应用，电容式指纹识别技术的原理是将人的手指作为电容器的一个电极，指纹传感器(Sensor)为另一个电极，利用手指指纹的脊和谷相对于平滑指纹传感器之间形成的电容差，形成灰度图像，然后通过指纹算法匹配指纹的全局及局部细节信息来实现指纹识别功能。
随着智能手机等电子消费品的普及，指纹识别逐渐由设计在显示屏外部发展至设计到显示屏内部，即由一般设计在手机的下方、侧边、背面发展为集成在手机的显示区域内。对于高解析度的中小尺寸产品(如智能手机、平板电脑等)，一般采用平面转换(In-Plane Switching，IPS)技术，可将指纹识别功能添加到内嵌式触控显示屏(In-cell Touch Panel)内，利用触控传感器(Touch Sensor)通过指纹识别与显示分时扫描的方式，便可实现将指纹识别集成到可视区(即触控、显示、指纹识别功能三合一)。但是对于解析度低且不带内嵌式触控功能的显示产品，例如小尺寸可视式指纹识别仪、具有指纹识别功能的家庭TV、车载显示屏等，无法使用同样的方法 将指纹识别集成到可视区内。
发明内容
本发明的目的在于提供一种显示屏，能够将指纹识别功能集成于其解析度低且不含触控功能的显示区内，无需分时扫描即可实现整屏多区块指纹识别，提高指纹识别精度，增加指纹识别应用的多样性，提高传统显示产品的性价比，提升用户的体验效果。
本发明的另一目的在于提供一种电子装置，其显示屏能够将指纹识别功能集成于解析度低且不含触控功能的显示区内，无需分时扫描即可实现整屏多区块指纹识别，提高指纹识别精度，增加指纹识别应用的多样性，提高传统显示产品的性价比，提升用户的体验效果。
为实现上述目的，本发明首先提供一种显示屏，包括TFT阵列基板、与TFT阵列基板相对设置的CF基板、以及夹设在TFT阵列基板与CF基板之间的液晶层；所述TFT阵列基板包括像素电极层、及多条指纹识别信号线，所述像素电极层与多条指纹识别信号线之间夹设一层间绝缘层；所述CF基板包括黑色矩阵层；
所述显示屏具有有效显示区，所述有效显示区包括多个像素单元，每一像素单元包括数个子像素单元；所述有效显示区内设置有一个或多个指纹识别区块；
在所述指纹识别区块内：每一子像素单元对应的像素电极层包括子像素电极、及与所述子像素电极分隔的指纹识别电极；每一子像素单元对应的黑色矩阵层包括遮盖所述子像素电极四周边缘的黑色边框、及完全遮盖指纹识别电极的黑色实块；所述指纹识别信号线接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片。
所述指纹识别信号线经由贯穿所述层间绝缘层的过孔接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片。
所述指纹识别信号线的材质为金属。
所述像素电极层的材料为氧化铟锡。
所述指纹识别区块的形状为矩形，边长为4mm～5.5mm。
在所述指纹识别区块外：每一子像素单元对应的像素电极层仅包括子像素电极；每一子像素单元对应的黑色矩阵层仅包括遮盖所述子像素电极四周边缘的黑色边框。
所述子像素单元为红色子像素单元、绿色子像素单元、或蓝色子像素单元。
本发明还提供一种电子装置，包括上述的显示屏。
本发明还提供一种显示屏，包括TFT阵列基板、与TFT阵列基板相对设置的CF基板、以及夹设在TFT阵列基板与CF基板之间的液晶层；所述TFT阵列基板包括像素电极层、及多条指纹识别信号线，所述像素电极层与多条指纹识别信号线之间夹设一层间绝缘层；所述CF基板包括黑色矩阵层；
所述显示屏具有有效显示区，所述有效显示区包括多个像素单元，每一像素单元包括数个子像素单元；所述有效显示区内设置有一个或多个指纹识别区块；
在所述指纹识别区块内：每一子像素单元对应的像素电极层包括子像素电极、及与所述子像素电极分隔的指纹识别电极；每一子像素单元对应的黑色矩阵层包括遮盖所述子像素电极四周边缘的黑色边框、及完全遮盖指纹识别电极的黑色实块；所述指纹识别信号线接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片；
其中，所述指纹识别信号线经由贯穿所述层间绝缘层的过孔接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片；
其中，所述指纹识别信号线的材质为金属。
本发明的有益效果：本发明提供的一种显示屏及电子装置，在有效显示区内设置一个或多个指纹识别区块，在所述指纹识别区块内：每一子像素单元对应的像素电极层包括子像素电极、及与所述子像素电极分隔的指纹识别电极；每一子像素单元对应的黑色矩阵层包括遮盖所述子像素电极四周边缘的黑色边框、及完全遮盖指纹识别电极的黑色实块；并设置指纹识别信号线接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片，能够将指纹识别功能集成于其解析度低且不含触控功能的显示区内，无需分时扫描即可实现整屏多区块指纹识别，提高指纹识别精度，增加指纹识别应用的多样性，提高传统显示产品的性价比，提升用户的体验效果。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为本发明的显示屏中指纹识别区块的分布示意图；
图2为本发明的显示屏的一个指纹识别区块内的像素电极层与黑色矩阵层的立体示意图；
图3为本发明的显示屏中一个指纹识别区块内的像素电极层与指纹识别信号线的平面示意图；
图4为本发明的显示屏的指纹识别区块内一个子像素单元对应的像素电极层与黑色矩阵层的平面示意图；
图5为本发明的显示屏在图3所示B-B处的剖面示意图；
图6为本发明的显示屏在指纹识别区块外一个子像素单元对应的像素电极层与黑色矩阵层的平面示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请同时参阅图1至图6，本发明提供一种显示屏。
如图5所示，该显示屏包括TFT阵列基板1、与TFT阵列基板1相对设置的CF基板2、以及夹设在TFT阵列基板1与CF基板2之间的液晶层3，进一步还可包括设在TFT阵列基板1下侧的背光模组6、及设于CF基板2上侧的封装盖板8。
结合图1至图4，所述显示屏具有有效显示区AA，所述有效显示区AA包括多个像素单元P，每一像素单元P包括数个子像素单元SP；所述有效显示区AA内设置有一个或多个指纹识别区块5。
所述TFT阵列基板1包括像素电极层11、及多条指纹识别信号线13，所述像素电极层11与多条指纹识别信号线13之间夹设一层间绝缘层12。在所述像素电极层11以下为常规的衬底层、栅极层、有源层、源/漏极层、及数层绝缘层等，这与现有技术无异，此处予以省略。
所述CF基板2包括黑色矩阵层21，还包括常规的衬底层、彩膜层等，彩膜层又包括红、绿、蓝各色色阻，同样与现有技术无异，此处予以省略。
传统无指纹识别设计的显示屏中，每一子像素单元对应的像素电极层为一整块的子像素电极，黑色矩阵为仅遮挡子像素电极四周边缘的黑色边框。而在本发明的显示屏中，在所述指纹识别区块5内：每一子像素单元SP对应的像素电极层11包括子像素电极111、及与所述子像素电极111分隔的指纹识别电极112；每一子像素单元SP对应的黑色矩阵层21包括遮盖所述子像素电极111四周边缘的黑色边框211、及完全遮盖指纹识别电极112的黑色实块212；所述指纹识别信号线13接触指纹识别电极112，将指纹 识别电极112电性连接至显示和指纹识别集成芯片9。而在所述指纹识别区块5外：每一子像素单元SP对应的像素电极层11仅包括子像素电极111；每一子像素单元SP对应的黑色矩阵层21仅包括遮盖所述子像素电极111四周边缘的黑色边框211。
所述指纹识别区块5内的所述子像素电极111用于显示，指纹识别电极112用于指纹识别，指纹识别信号线13连接指纹识别电极112、与显示和指纹识别集成芯片9，实现将指纹识别功能集成到显示屏的有效显示区AA内。这种将子像素电极111与指纹识别电极112分开设计的方式，使得显示信号和指纹识别信号之间互不干扰，无需采用分时扫描，不会相互挤占扫描的时间资源，而是采用指纹识别和显示分别独自进行扫描，可以提高指纹识别的扫描频率及效率，且允许显示屏不具备高解析度及触控功能。
具体地：
所述像素电极层11的材料优选氧化铟锡(Indium Tin Oxide，ITO)。在指纹识别区块5内，子像素电极111与指纹识别电极112两者分隔的比例需要在满足指纹识别检测需求的基础上尽量使子像素电极111的面积大一些，以减小像素开口率的损失。
所述指纹识别信号线13的材质优选金属，制作该指纹识别信号线13便需要增加沉积并图案化金属层的制程，并在层间绝缘层12上对应指纹识别电极112形成过孔122，所述指纹识别信号线13经由贯穿所述层间绝缘层12的过孔122接触指纹识别电极112，将指纹识别电极112电性连接至显示和指纹识别集成芯片9。
所述指纹识别区块5的具体数量以满足用户的体验度为准，例如，若设计五个指纹识别区块或十个指纹识别区块时，便可实现单手五指或者双手十指的指纹识别，而且同时检测的手指个数越多，指纹识别的准确度也越高，保护隐私的安全性也越高。每一指纹识别区块5的大小一般设计为与人手指触摸到显示屏上的面积差不多，形状为矩形，边长约为4mm～5.5mm。
每一指纹识别区块5可以对应若干个像素单元P，所述像素单元P可以但不限于包括红色、绿色、与蓝色的三个子像素单元，即所述子像素单元SP可以为红色子像素单元、绿色子像素单元、或蓝色子像素单元。指纹识别区块5内需要连接指纹识别信号线13的指纹识别电极112的数量可以根据单个子像素单元SP的大小以及拉线的难易度来决定。
所述显示和指纹识别集成芯片9兼具显示与指纹识别驱动功能，能够节约显示屏内的拉线空间，降低设计复杂度。
本发明的显示屏进行指纹识别的工作原理是：TFT阵列基板1内的多个指纹识别电极112与手指指纹的脊、谷之间分别形成电容，利用相邻电容的差值形成能被指纹算法识别的多灰阶指纹图像，进而检测出手指指纹的局部特征点，最终实现指纹识别功能。
基于同一发明构思，本发明还提供一种电子装置，该电子装置包括上述显示屏，能够将指纹识别功能集成于其解析度低且不含触控功能的显示区内，无需分时扫描即可实现整屏多区块指纹识别，提高指纹识别精度，增加指纹识别应用的多样性，提高传统显示产品的性价比，提升用户的体验效果。
综上所述，本发明的显示屏及电子装置，在有效显示区内设置一个或多个指纹识别区块，在所述指纹识别区块内：每一子像素单元对应的像素电极层包括子像素电极、及与所述子像素电极分隔的指纹识别电极；每一子像素单元对应的黑色矩阵层包括遮盖所述子像素电极四周边缘的黑色边框、及完全遮盖指纹识别电极的黑色实块；并设置指纹识别信号线接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片，能够将指纹识别功能集成于其解析度低且不含触控功能的显示区内，无需分时扫描即可实现整屏多区块指纹识别，提高指纹识别精度，增加指纹识别应用的多样性，提高传统显示产品的性价比，提升用户的体验效果。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (13)

  1. 一种显示屏，包括TFT阵列基板、与TFT阵列基板相对设置的CF基板、以及夹设在TFT阵列基板与CF基板之间的液晶层；所述TFT阵列基板包括像素电极层、及多条指纹识别信号线，所述像素电极层与多条指纹识别信号线之间夹设一层间绝缘层；所述CF基板包括黑色矩阵层；
    所述显示屏具有有效显示区，所述有效显示区包括多个像素单元，每一像素单元包括数个子像素单元；所述有效显示区内设置有一个或多个指纹识别区块；
    在所述指纹识别区块内：每一子像素单元对应的像素电极层包括子像素电极、及与所述子像素电极分隔的指纹识别电极；每一子像素单元对应的黑色矩阵层包括遮盖所述子像素电极四周边缘的黑色边框、及完全遮盖指纹识别电极的黑色实块；所述指纹识别信号线接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片。
  2. 如权利要求1所述的显示屏，其中，所述指纹识别信号线经由贯穿所述层间绝缘层的过孔接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片。
  3. 如权利要求1所述的显示屏，其中，所述指纹识别信号线的材质为金属。
  4. 如权利要求1所述的显示屏，其中，所述像素电极层的材料为氧化铟锡。
  5. 如权利要求1所述的显示屏，其中，所述指纹识别区块的形状为矩形，边长为4mm～5.5mm。
  6. 如权利要求1所述的显示屏，其中，在所述指纹识别区块外：每一子像素单元对应的像素电极层仅包括子像素电极；每一子像素单元对应的黑色矩阵层仅包括遮盖所述子像素电极四周边缘的黑色边框。
  7. 如权利要求1所述的显示屏，其中，所述子像素单元为红色子像素单元、绿色子像素单元、或蓝色子像素单元。
  8. 一种电子装置，包括如权利要求1所述的显示屏。
  9. 一种显示屏，包括TFT阵列基板、与TFT阵列基板相对设置的CF基板、以及夹设在TFT阵列基板与CF基板之间的液晶层；所述TFT阵列基板包括像素电极层、及多条指纹识别信号线，所述像素电极层与多条指纹识别信号线之间夹设一层间绝缘层；所述CF基板包括黑色矩阵层；
    所述显示屏具有有效显示区，所述有效显示区包括多个像素单元，每一像素单元包括数个子像素单元；所述有效显示区内设置有一个或多个指纹识别区块；
    在所述指纹识别区块内：每一子像素单元对应的像素电极层包括子像素电极、及与所述子像素电极分隔的指纹识别电极；每一子像素单元对应的黑色矩阵层包括遮盖所述子像素电极四周边缘的黑色边框、及完全遮盖指纹识别电极的黑色实块；所述指纹识别信号线接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片；
    其中，所述指纹识别信号线经由贯穿所述层间绝缘层的过孔接触指纹识别电极，将指纹识别电极电性连接至显示和指纹识别集成芯片；
    其中，所述指纹识别信号线的材质为金属。
  10. 如权利要求9所述的显示屏，其中，所述像素电极层的材料为氧化铟锡。
  11. 如权利要求9所述的显示屏，其中，所述指纹识别区块的形状为矩形，边长为4mm～5.5mm。
  12. 如权利要求9所述的显示屏，其中，在所述指纹识别区块外：每一子像素单元对应的像素电极层仅包括子像素电极；每一子像素单元对应的黑色矩阵层仅包括遮盖所述子像素电极四周边缘的黑色边框。
  13. 如权利要求9所述的显示屏，其中，所述子像素单元为红色子像素单元、绿色子像素单元、或蓝色子像素单元。
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