WO2021136140A1 - Module d'affichage et dispositif électronique - Google Patents

Module d'affichage et dispositif électronique Download PDF

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Publication number
WO2021136140A1
WO2021136140A1 PCT/CN2020/139908 CN2020139908W WO2021136140A1 WO 2021136140 A1 WO2021136140 A1 WO 2021136140A1 CN 2020139908 W CN2020139908 W CN 2020139908W WO 2021136140 A1 WO2021136140 A1 WO 2021136140A1
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WO
WIPO (PCT)
Prior art keywords
light
display module
light source
sensing layer
display panel
Prior art date
Application number
PCT/CN2020/139908
Other languages
English (en)
Chinese (zh)
Inventor
杨刚
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 WO2021136140A1 publication Critical patent/WO2021136140A1/fr

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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
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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

Definitions

  • the present invention relates to the technical field of electronic equipment, in particular to a display module and electronic equipment.
  • OLED Organic Light-Emitting Diode
  • optical fingerprint modules in the industry can only be applied to OLED display modules, not TFT display modules.
  • OLED displays are expensive and difficult to supply.
  • the reason why the TFT display module cannot use the existing photoelectric fingerprint is that the light reflected by the finger cannot reach the fingerprint module through the backlight (light guide plate of the backlight);
  • the existing display module has the problem that the optical fingerprint recognition function cannot be realized.
  • the purpose of the present invention is to provide a display module and an electronic device to solve the problem that the display module cannot realize the optical fingerprint recognition function in the prior art.
  • the present invention is implemented as follows:
  • an embodiment of the present invention provides a display module, including a backlight source and a display panel, the backlight source including a first light source for providing visible light and a second light source for providing invisible light;
  • the display module further includes:
  • a fingerprint sensing layer disposed on a side of the display panel away from the backlight source, wherein the fingerprint sensing layer is used to receive reflected light reflected by a finger above the display panel;
  • the reflected light is the reflected light of the invisible light emitted by the second light source toward the display panel.
  • an embodiment of the present invention also provides an electronic device, including: the above-mentioned display module.
  • the backlight source includes a first light source for providing visible light and a second light source for providing invisible light;
  • the display module is also It includes a fingerprint sensing layer, which is arranged on the side of the display panel facing away from the backlight, wherein the fingerprint sensing layer is used to receive reflected light reflected by a finger above the display panel; the reflected light is The invisible light emitted by the second light source toward the display panel is reflected light; it can ensure that the light used to sense fingerprints reaches the fingerprint sensing layer, thereby ensuring that the application of the optical fingerprint module on the display module can be realized. It is a good solution to the problem that the display module in the prior art cannot realize the optical fingerprint recognition function.
  • FIG. 1 is a first structural diagram of a display module according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the arrangement of a first light source and a second light source according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of the photosensitive element implementing the photosensitive function of the embodiment of the present invention.
  • FIG. 4 is a second schematic diagram of the structure of the display module of the embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the optical fingerprint recognition function implemented by the display module of the embodiment of the present invention.
  • the present invention provides a display module, as shown in Figure 1, Figure 2, Figure 4 and Figure 5, including a backlight source 1 and a display panel 2.
  • the backlight source 1 includes a first light source 3 for providing visible light and a second light source 4 for providing invisible light;
  • the display module also includes: a fingerprint sensing layer 5, which is disposed at the back of the display panel 2.
  • the display module provided by the embodiment of the present invention includes a backlight source and a display panel by providing a display module, and the backlight source includes a first light source for providing visible light and a second light source for providing invisible light;
  • the display module further includes: a fingerprint sensing layer disposed on a side of the display panel away from the backlight source, wherein the fingerprint sensing layer is used to receive the reflected light reflected by a finger above the display panel;
  • the reflected light is the reflected light of the invisible light from the second light source toward the display panel; it can ensure that the light used to sense fingerprints reaches the fingerprint sensing layer, thereby ensuring that the optical fingerprint module is in the display module (
  • the application on the TFT display module can well solve the problem that the display module in the prior art cannot realize the optical fingerprint recognition function.
  • the backlight source 1 further includes a light guide plate 6.
  • the first light source 3 and the second light source 4 are both arranged on the side surface of the light guide plate 6, and the side surface is connected to the light guide plate 6.
  • the light-emitting surfaces of 6 are adjacent.
  • the first light source 3 and the second light source 4 are arranged at intervals.
  • the display function of the display module can be ensured as much as possible, and the optical fingerprint recognition function can be better realized.
  • the display panel 2 includes an array substrate 7, a color filter substrate 8, and a liquid crystal layer disposed between the array substrate 7 and the color filter substrate 8. (Not shown in the figure); the fingerprint sensing layer 5 is disposed on the side of the color filter substrate 8 away from the liquid crystal layer.
  • the fingerprint sensing layer 5 includes a plurality of photosensitive elements 9, and the orthographic projection of the plurality of photosensitive elements 9 on the color filter substrate 8 is located on the black of the color filter substrate 8. Matrix BM area.
  • the sensing position in the fingerprint sensing layer does not coincide with the position of the red, green, and blue RGB pixels in the color filter substrate.
  • the display module further includes: a glass cover plate 10, the glass cover plate 10 is disposed on the fingerprint sensor layer 5 away from the color film One side of the substrate 8.
  • the display module further includes: a polarizer 11, the polarizer 11 is disposed on the fingerprint sensing layer 5 and the glass cover 10 between.
  • the display module further includes: a binding (BD) area 12, and the fingerprint sensing layer 5 connects with each other through the binding area 12 The second external line connection.
  • BD binding
  • the second light source is a light source that provides infrared non-visible light, but it is not limited to this.
  • an upper glass may be arranged between the color filter substrate and the fingerprint sensing layer, and a lower glass may be arranged between the array substrate and the backlight source to further protect the display panel.
  • the display module provided by the embodiment of the present invention will be further described below.
  • the following display module takes a TFT display module as an example.
  • the embodiments of the present invention provide a display module, which can be specifically implemented as a TFT display module.
  • the backlight source of the TFT display module can be changed by the light emitting diode (LED) lamp and the fingerprint sensor.
  • Sensor Sensing layer (i.e. the above-mentioned fingerprint sensing layer), which realizes the application of the optical fingerprint module on the TFT display module; specific (the second light source is an infrared light source as an example):
  • the fingerprint sensor layer can receive infrared non-visible light, so that the light source required by the fingerprint sensor layer is generated without affecting the display of the display screen.
  • FIG. 1 the overall structure of the solution provided by the embodiment of the present invention is shown in FIG. 1.
  • the fingerprint sensor layer is placed on the upper glass, and indium tin oxide (Indium Tin Oxide) can be completed in the BD (binding) area of the upper glass.
  • ITO Indium Tin Oxide
  • ITO is bound (i.e. fixed) and connected with other circuits (i.e., the above-mentioned second external circuit).
  • some of the LED lights of the backlight source are infrared non-visible light LED lights, which are used for the fingerprint module (that is, the fingerprint sensor layer) to sense and receive the light emitting light source (specifically the light reflected from the outside world), as shown in the figure 2
  • Infrared non-visible light LED lights the specific number and location of the lights can be adjusted according to actual needs, which is not limited here.
  • the fingerprint sensor sensing layer in the embodiment of the present invention mainly realizes the sensing of infrared non-visible light through photosensitive diodes (as shown in FIG. 3); specifically, in order to prevent the photosensitive diodes of the fingerprint sensor sensing layer from blocking the pixel display of the display screen and affecting the display As a result, the position of the photosensitive diode in the embodiment of the present invention needs to avoid the RGB pixels of the color filter (color filter, that is, the above-mentioned color film substrate). As shown in FIG. 4, R, G, and B represent the pixel points of the color filter, and S Represents the photosensitive diode of the fingerprint sensor sensing layer.
  • the color filter at the upper glass BM position can be connected to the external circuit (that is, the above-mentioned first external circuit) after the ITO is bound by ACF (anisotropic conductive film), conductive glue, and the like.
  • ACF anisotropic conductive film
  • the point light source emitted by the backlight LED lamp becomes a surface light source after passing through the backlight light guide plate and various film materials.
  • the entire display area of the display screen emits light, and the emitted light reaches after passing through the display screen.
  • the finger is then reflected by the finger and irradiated to the photosensitive diode of the fingerprint sensor sensing layer (as shown in Figure 5).
  • the resistance value changes to convert the light signal into an electrical signal, and the connection is realized through the BD (binding) area.
  • the connection of the external circuit (that is, the above-mentioned second external circuit) is specifically the transmission of electrical signals to the external circuit through the BD.
  • this solution realizes the application of the optical fingerprint module to the TFT display module, and prevents the light from being blocked by the backlight by placing the fingerprint sensor layer on the upper glass.
  • the embodiment of the present invention can realize full unlocking of the screen or partial unlocking, and at the same time, the second light source can be placed on other different positions and different devices, and can also meet the needs of different applications for fingerprint recognition; for example, it can be applied to
  • the display screens of various terminal products such as mobile phones, tablet computers (portable android devices, PAD), fingerprint locks, and augmented reality (Augmented Reality, AR) wearable devices, transparent battery covers on the back and transparent parts on the side middle frame, etc.
  • augmented reality Augmented Reality, AR wearable devices
  • An embodiment of the present invention also provides an electronic device, including: the above-mentioned display module.
  • the electronic device provided by the embodiment of the present invention can realize each function realized by the display module in the embodiment of FIG. 1 to FIG.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Image Input (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un module d'affichage et un dispositif électronique. Le module d'affichage comprend une source de rétroéclairage (1) et un panneau d'affichage (2), et la source de rétroéclairage (1) comprend une première source lumineuse (3) destinée à fournir une lumière visible et une seconde source lumineuse (4) destinée à fournir une lumière invisible. Le module d'affichage comprend en outre une couche de détection d'empreinte digitale (5) qui se situe du côté du panneau d'affichage (2) opposé à la source de rétroéclairage (1), la couche de détection d'empreinte digitale (5) servant à recevoir la lumière ayant été réfléchie par un doigt au-dessus du panneau d'affichage (2), et la lumière réfléchie étant la lumière émise par la seconde source lumineuse (4) vers le panneau d'affichage (2) après que la lumière invisible a été réfléchie.
PCT/CN2020/139908 2019-12-31 2020-12-28 Module d'affichage et dispositif électronique WO2021136140A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911421623.5 2019-12-31
CN201911421623.5A CN111123569A (zh) 2019-12-31 2019-12-31 显示模组及电子设备

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WO2021136140A1 true WO2021136140A1 (fr) 2021-07-08

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111123569A (zh) * 2019-12-31 2020-05-08 维沃移动通信有限公司 显示模组及电子设备
CN112965282A (zh) * 2021-02-09 2021-06-15 维沃移动通信有限公司 显示模组及电子设备
CN113050324B (zh) * 2021-04-06 2022-11-08 维沃移动通信有限公司 显示模组及电子设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108415188A (zh) * 2018-05-02 2018-08-17 上海中航光电子有限公司 一种液晶显示面板、显示装置及其指纹解锁方法
CN108846391A (zh) * 2018-08-28 2018-11-20 武汉华星光电技术有限公司 指纹模组和显示设备
US20190265815A1 (en) * 2012-11-27 2019-08-29 Guardian Glass, LLC Transparent conductive coating for capacitive touch panel with additional functional film(s)
TWI676069B (zh) * 2018-12-18 2019-11-01 群光電子股份有限公司 電子裝置及其指紋辨識及均光結構
CN111123569A (zh) * 2019-12-31 2020-05-08 维沃移动通信有限公司 显示模组及电子设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190265815A1 (en) * 2012-11-27 2019-08-29 Guardian Glass, LLC Transparent conductive coating for capacitive touch panel with additional functional film(s)
CN108415188A (zh) * 2018-05-02 2018-08-17 上海中航光电子有限公司 一种液晶显示面板、显示装置及其指纹解锁方法
CN108846391A (zh) * 2018-08-28 2018-11-20 武汉华星光电技术有限公司 指纹模组和显示设备
TWI676069B (zh) * 2018-12-18 2019-11-01 群光電子股份有限公司 電子裝置及其指紋辨識及均光結構
CN111123569A (zh) * 2019-12-31 2020-05-08 维沃移动通信有限公司 显示模组及电子设备

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