WO2023155831A1 - Écran d'affichage et dispositif électronique - Google Patents

Écran d'affichage et dispositif électronique Download PDF

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Publication number
WO2023155831A1
WO2023155831A1 PCT/CN2023/076456 CN2023076456W WO2023155831A1 WO 2023155831 A1 WO2023155831 A1 WO 2023155831A1 CN 2023076456 W CN2023076456 W CN 2023076456W WO 2023155831 A1 WO2023155831 A1 WO 2023155831A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
display panel
display screen
polarization direction
fingerprint
Prior art date
Application number
PCT/CN2023/076456
Other languages
English (en)
Chinese (zh)
Inventor
林华鑫
Original Assignee
维沃移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Publication of WO2023155831A1 publication Critical patent/WO2023155831A1/fr

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Classifications

    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements

Definitions

  • the present application relates to the technical field of electronic equipment, in particular to a display screen and electronic equipment.
  • a display screen usually hides a super macro camera under the display screen.
  • the display substrate When the light-emitting side of the display substrate emits light, the display substrate has light leakage, that is, the part of the light emitted from the backlight side of the display substrate is emitted toward the fingerprint module. Light leakage causes interference when the fingerprint module recognizes the fingerprint texture information, reduces the overall signal-to-noise ratio and affects the display quality, thereby reducing the recognition accuracy of the fingerprint module.
  • Embodiments of the present application provide a display screen and electronic equipment to solve the technical problems of low image signal-to-noise ratio and low recognition accuracy of fingerprint modules caused by light leakage in the display screen in the related art.
  • an embodiment of the present application provides a display screen, including: a stacked display panel, a circular polarizer, and a touch cover, the side of the display panel facing away from the circular polarizer is provided with a fingerprint module ;
  • the reflected light emitted from the display panel toward the fingerprint module is elliptically polarized light, and the reflected light is emitted from the display panel toward the circular polarizer and reflected by the measured object on the cover;
  • the fingerprint module includes a fingerprint sensor, and a filter layer is provided on the surface of the fingerprint sensor facing the display panel, and the filter layer can transmit the light of the first polarization direction in the elliptically polarized light to emit to the fingerprint sensor, and can filter part of the non-polarized light emitted by the display panel towards the fingerprint module, and the first polarization direction is the long axis direction of the elliptically polarized light.
  • an embodiment of the present application provides an electronic device, including the above-mentioned display screen.
  • the filter layer can transmit the light of the first polarization direction in the elliptically polarized light to be incident on the fingerprint sensor,
  • the first polarization direction is the long axis direction of the elliptically polarized light, since the light in the long axis direction of the elliptically polarized light accounts for a relatively large proportion, so that more light in the reflected light can be irradiated on the fingerprint sensor to meet the fingerprint identification; at the same time
  • the filter layer can filter part of the light emitted by the display panel toward the fingerprint module, and can filter part of the light leakage existing in the display panel, so as to reduce the interference caused by the light leakage to the fingerprint module's recognition of fingerprint information, improve the overall signal-to-noise ratio and improve the display quality , thereby improving the accuracy of fingerprint recognition.
  • FIG. 1 shows a schematic diagram of a display screen provided by an embodiment of the present application
  • Fig. 2 shows a schematic diagram of polarization conversion of reflected light in a display screen provided by an embodiment of the present application
  • FIG. 3 shows a schematic diagram of a filter layer and a fingerprint sensor in a first viewing angle in a fingerprint module provided by an embodiment of the present application
  • Fig. 4 shows the partially enlarged schematic diagram of place A in Fig. 3;
  • FIG. 5 shows a schematic diagram of the three-dimensional structure of FIG. 4 .
  • 10 display panel; 11: substrate glass; 12: light-emitting layer; 121: light-emitting pixel; 13: packaging glass; 20: circular polarizer; 21: quarter wave plate; 22: linear polarizer; 30: touch cover board; 40: fingerprint module; 41: filter layer; 411: rectangular hole; 42: fingerprint sensor; 421: receiving pixel; 43: lens assembly; 44: substrate; 50: measured object.
  • a display screen is provided.
  • One side of the polarizer 20 is provided with a fingerprint module; the reflected light emitted from the display panel 10 toward the fingerprint module 40 is elliptically polarized light, and the reflected light is emitted by the display panel 10 toward the direction of the circular polarizer 20 and is emitted by the cover plate 30
  • the light reflected by the measured object 50; the fingerprint module 40 includes a fingerprint sensor 42, and the surface of the fingerprint sensor 42 facing the display panel 10 is provided with a filter layer 41, and the filter layer 41 can make the first polarization direction of the elliptically polarized light
  • the light passes through to strike the fingerprint sensor 42 and can filter part of the light emitted by the display panel 10 toward the fingerprint module.
  • the first polarization direction is the long axis direction of the elliptically polarized light. It can be seen that this embodiment can filter part of the light leakage existing in the display panel, so as to reduce the interference caused by the light leakage to the fingerprint module when identifying the fingerprint information, improve the overall signal-to-noise ratio to improve the display quality, and thereby improve the accuracy of fingerprint identification.
  • the display screen may specifically include: a display panel 10, a circular polarizer 20 and a touch cover 30 arranged in layers, that is, in the direction from bottom to top, the display panel 10, Circular polarizer 20 and touch cover 30 .
  • a fingerprint module 40 is provided on the side of the display panel 10 away from the circular polarizer 20 , that is, the fingerprint module 40 is located on the lower side of the display panel 10 .
  • the surface of the touch cover 30 away from the circular polarizer 20 is used for the touch of the measured object 50, that is, the upper surface of the touch cover 30 is used for The touch of the object under test 50 .
  • the measured object 50 may be a finger or other measured objects, and the following description will be made by taking the measured object 50 as a finger as an example.
  • the display panel 10 can emit light, which is called outgoing light.
  • the outgoing light sequentially passes through the circular polarizer 20 and the touch cover 30 to the finger, and then is reflected by the finger to form light carrying fingerprint information.
  • the light is called reflected light, and the reflected light passes through the touch cover 30, the circular polarizer 20, and the display panel 10 to the fingerprint sensor 42 of the fingerprint module in sequence, so that the fingerprint sensor 42 detects the light carrying fingerprint information.
  • the reflected light becomes circularly polarized light after being polarized by the circular polarizer 20 (the process is represented by E1 in Figure 2), and then polarized by the display panel 10 (the process is represented by E2 in Figure 2 ). Indicated) becomes elliptically polarized light.
  • a filter layer 41 is provided on the surface of the fingerprint sensor 42 facing the display panel 10, that is, a filter layer 41 is provided on the upper surface of the fingerprint sensor 42, and the filter layer 41 is used to make the elliptical polarization
  • the light of the first polarization direction in the light passes through to be incident on the fingerprint sensor 42, so that the fingerprint sensor 42 detects the light carrying the fingerprint information, wherein the first polarization direction is the long axis direction of elliptically polarized light.
  • the filter layer 41 can also filter out the The light emitted by the fingerprint module 40, that is, filters out the part of the light leakage existing in the display panel 10 to reduce the transmittance of the light leakage, improve the overall signal-to-noise ratio to improve the display quality, and thereby improve the accuracy of fingerprint recognition. .
  • the fingerprint sensor 42 includes a plurality of receiving pixels 421; the material of the filter layer 41 is a non-transparent material, and the filter layer 41 is provided with a light-transmitting structure at a position opposite to each receiving pixel.
  • the light-transmitting structure includes a plurality of rectangular holes 411 arranged in an array; the first polarization direction is parallel to the long sides of the rectangular holes 411, so that the light of the first polarization direction in the elliptically polarized light passes through the rectangular holes 411 .
  • the fingerprint sensor 42 includes a plurality of receiving pixels 421, and the receiving pixels 421 can convert optical signals into electrical signals for imaging.
  • the filter layer 41 is provided with a light-transmitting structure at a position opposite to each receiving pixel 421 , and the light-transmitting structure includes a plurality of rectangular holes 411 arranged in an array.
  • the array includes M rows and N columns, and the M rows include a first preset number of matrices
  • the N columns of shaped holes 411 include a second preset number of rectangular holes 411 .
  • each dotted frame in the filter layer in FIG. 3 corresponds to the corresponding receiving pixel 421 , and FIG. 3 only shows one light-transmitting structure, but in practice, each dotted-line frame is provided with a light-transmitting structure.
  • the filter layer 41 is made of a non-transparent material, that is to say, if the reflected light hits the region (non-rectangular hole 411) of the filter layer 41 with material, it cannot pass through the filter layer 41 to the fingerprint sensor 42.
  • the reflected light irradiates the rectangular hole 411 , and can pass through the rectangular hole 411 and irradiate onto the fingerprint sensor 42 .
  • the first polarization direction is parallel to the long side of the rectangular hole 411, that is, the long axis direction of elliptically polarized light (direction E in the figure) is parallel to the long side of the rectangular hole 411, like this,
  • the light of the first polarization direction in the elliptically polarized light can pass through the rectangular hole 411 to be irradiated onto the fingerprint sensor 42 , so that the fingerprint sensor 42 can detect the light carrying fingerprint information more accurately.
  • the filter layer 41 provided in this embodiment It can filter out most of the light leakage to reduce the transmittance of light leakage, improve the overall signal-to-noise ratio to improve the display quality, and thus improve the accuracy of fingerprint recognition.
  • the elliptically polarized light also includes the light of the second polarization direction, and the second polarization direction is the short axis direction of the elliptically polarized light; the second polarization direction is parallel to the short side of the rectangular hole, so that the elliptically polarized light The light in the second polarization direction passes through the rectangular hole to be incident on the fingerprint sensor 42 .
  • the longer side of a rectangle is perpendicular to its shorter side.
  • the second polarization direction is parallel to the short side of the rectangular hole 411, that is, the short axis direction of the elliptically polarized light is parallel to the short side of the rectangular hole 411, like this, the elliptical
  • the light of the first polarization direction and the second polarization direction in the polarized light can pass through the rectangular hole 411 and shoot onto the fingerprint sensor 42, which further improves the transmittance of the elliptically polarized light through the rectangular hole, so that the fingerprint sensor 42 is opposite to the fingerprint sensor 42.
  • the light carrying the fingerprint information is detected more precisely.
  • the material of the filter layer 41 can be selected from silicon or aluminum, so that the filter layer 41 can be separated from fingerprints. Sensor 42 is better integrated.
  • the specific material of the filter layer 41 can also be other materials such as metal, which is not limited in this embodiment, and can be selected according to actual conditions.
  • a plurality of rectangular holes 411 are arranged in a matrix.
  • the number of rows and columns of the matrix are the same, and the number of rectangular holes 411 included in each row and column is the same as the number of rows/columns.
  • the rectangular holes 411 can be uniformly distributed, so that the light of the first polarization direction in the elliptically polarized light can pass through the filter layer 41 uniformly, so as to further improve the accuracy of fingerprint information identification by the fingerprint sensor 42 .
  • the number of rows and the number of columns of the matrix can be two, and each row and each column respectively include two rectangular holes 411; or, as shown in Figure 5 and Figure 6, the number of rows of the matrix and the number of columns can be three, and each row and each column respectively include three rectangular holes 411; in addition, as shown in Figure 5 and Figure 6, the ratio range of the first length to the second length is [1.2, 2], Wherein, the first length is the length of the long side of the rectangular hole 411 , and the second length is the length of the short side of the rectangular hole 411 .
  • this embodiment may not limit the specific arrangement form of the matrix, that is, the specific arrangement of the plurality of rectangular holes 411, and the specific ratio of the first length to the second length, and it is determined according to the actual situation. set up.
  • the ratio between the area of each light-transmitting structure and the area of the corresponding receiving pixel 421 is greater than or equal to 0.8, that is, the area of one light-transmitting structure corresponding to one receiving pixel 421 accounts for greater than or equal to 80% of the area of the receiving pixel 421 .
  • a display panel 10 includes a laminated base glass 11 , a light-emitting layer 12 and an encapsulation glass 13 , and a circular polarizer 20 includes a quarter wave plate 21 and a linear polarizer 22
  • the quarter-wave plate 21 is set on the packaging glass 13
  • the linear polarizer 22 is set on the quarter-wave plate 21
  • the touch cover 30 is set on the linear polarizer 22
  • the fingerprint module is set on the base glass 11
  • the display panel 10 includes a laminated base glass 11, a light emitting layer 12, and an encapsulation glass 13, wherein the light emitting layer 12 is composed of a plurality of light emitting pixels 121, and the light emitting image is
  • the pixels 121 serve as light sources of the display panel 10 and emit light upward.
  • the display screen includes fingerprint module, base glass 11, light emitting layer 12, packaging glass 13, quarter wave plate 21, linear polarizer 22 and Touch the cover plate 30 .
  • a surface lower surface shown in FIG. A certain distance, the specific value of the distance can be set according to actual needs, which is not limited in this embodiment.
  • a quarter-wave plate (1/4 wave plate) is a birefringent single-crystal wave plate of a certain thickness, also known as a phase retarder.
  • the 1/4 wave plate can generate ⁇ /4 optical path difference (ie ⁇ /2 phase difference) between the outgoing ordinary light (o light) and extraordinary light (e light).
  • o light ordinary light
  • e light extraordinary light
  • the angle between the polarization direction of the linearly polarized light and the optical axis direction of the 1/4 wave plate is ⁇ .
  • the fingerprint module further includes a lens assembly 43 and a substrate 44 , and from top to bottom, the lens assembly 43 , the fingerprint sensor 42 and the substrate 44 are arranged in sequence.
  • the light of the first polarization direction in the elliptically polarized light is first irradiated onto the lens assembly 43, and the lens assembly 43 is used to send the fingerprint information
  • the emitted light is imaged to the fingerprint sensor 42 for fingerprint detection and/or fingerprint recognition.
  • the display screen includes a stacked display panel, a circular polarizer and a touch cover.
  • a fingerprint module is provided on the side of the display panel away from the circular polarizer;
  • the light is elliptically polarized light, and the reflected light is the light emitted by the display panel toward the circular polarizer and reflected by the object on the cover;
  • the fingerprint module includes a fingerprint sensor, and the fingerprint sensor is provided with a filter on the surface facing the display panel.
  • the filter layer can transmit the light of the first polarization direction in the elliptically polarized light to be incident on the fingerprint sensor, and can filter part of the light emitted by the display panel towards the fingerprint module, the first polarization direction is the length of the elliptically polarized light axis direction. It can be seen that this embodiment can filter part of the light leakage existing in the display panel, so as to reduce the interference caused by the light leakage to the fingerprint module when identifying the fingerprint information, improve the overall signal-to-noise ratio to improve the display quality, and thereby improve the accuracy of fingerprint identification.
  • the embodiment of the present application also provides an electronic device, which may specifically include the above-mentioned display screen.
  • electronic devices include but are not limited to mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminals, wearable devices, and pedometers.
  • An electronic device includes the above-mentioned display screen.
  • the reflected light formed by the finger reflection can also carry biological sign information such as pulse, blood oxygen, and rest. That is to say, in addition to detecting fingerprints, the fingerprint sensor of this embodiment can also detect other biological sign information such as pulse, blood oxygen, and rest, so as to perform other functions such as living body detection and human health detection, which enriches the functions of electronic devices.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Image Input (AREA)

Abstract

Les modes de réalisation de la présente demande concernent un écran d'affichage et un dispositif électronique. L'écran d'affichage comprend un panneau d'affichage, un polariseur circulaire et une plaque de recouvrement, qui sont agencés de manière empilée, un module d'empreinte digitale étant disposé du côté du panneau d'affichage qui est opposé au polariseur circulaire ; la lumière réfléchie émise par le panneau d'affichage vers le module d'empreinte digitale est une lumière polarisée de manière elliptique, et la lumière réfléchie est une lumière émise par le panneau d'affichage vers le polariseur circulaire et réfléchie par un objet à tester sur la plaque de recouvrement ; et le module d'empreinte digitale comprend un capteur d'empreinte digitale, et une couche filtrante est disposée sur la surface du capteur d'empreinte digitale qui fait face au panneau d'affichage. La couche filtrante permet à la lumière dans une première direction de polarisation de la lumière à polarisation elliptique de la traverser, de façon à être émise vers le capteur d'empreinte digitale ; et la couche filtrante peut également filtrer une partie de la lumière émise par le panneau d'affichage vers le module d'empreinte digitale. La première direction de polarisation est une direction d'axe majeur de la lumière polarisée elliptique.
PCT/CN2023/076456 2022-02-21 2023-02-16 Écran d'affichage et dispositif électronique WO2023155831A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210160426.8 2022-02-21
CN202210160426.8A CN114518813A (zh) 2022-02-21 2022-02-21 显示屏及电子设备

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CN114518813A (zh) * 2022-02-21 2022-05-20 维沃移动通信有限公司 显示屏及电子设备

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CN110741384A (zh) * 2019-04-30 2020-01-31 深圳市汇顶科技股份有限公司 指纹识别装置和电子设备
CN111095281A (zh) * 2019-08-06 2020-05-01 深圳市汇顶科技股份有限公司 指纹检测的装置和电子设备
CN113569601A (zh) * 2020-04-28 2021-10-29 华为技术有限公司 屏下指纹识别系统及电子设备
CN114518813A (zh) * 2022-02-21 2022-05-20 维沃移动通信有限公司 显示屏及电子设备

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CN110730968A (zh) * 2019-05-06 2020-01-24 深圳市汇顶科技股份有限公司 指纹识别装置和电子设备
CN111241954B (zh) * 2020-01-03 2024-07-16 京东方科技集团股份有限公司 显示面板和电子装置
WO2021146955A1 (fr) * 2020-01-21 2021-07-29 深圳市汇顶科技股份有限公司 Appareil de détection optique d'empreintes digitales, écran tactile et dispositif électronique

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Publication number Priority date Publication date Assignee Title
CN110741384A (zh) * 2019-04-30 2020-01-31 深圳市汇顶科技股份有限公司 指纹识别装置和电子设备
CN111095281A (zh) * 2019-08-06 2020-05-01 深圳市汇顶科技股份有限公司 指纹检测的装置和电子设备
CN113569601A (zh) * 2020-04-28 2021-10-29 华为技术有限公司 屏下指纹识别系统及电子设备
CN114518813A (zh) * 2022-02-21 2022-05-20 维沃移动通信有限公司 显示屏及电子设备

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