WO2022267141A1 - 显示模组 - Google Patents

显示模组 Download PDF

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Publication number
WO2022267141A1
WO2022267141A1 PCT/CN2021/107691 CN2021107691W WO2022267141A1 WO 2022267141 A1 WO2022267141 A1 WO 2022267141A1 CN 2021107691 W CN2021107691 W CN 2021107691W WO 2022267141 A1 WO2022267141 A1 WO 2022267141A1
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WO
WIPO (PCT)
Prior art keywords
cover plate
display module
light
light source
module according
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2021/107691
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English (en)
French (fr)
Inventor
刘广坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
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 Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US17/439,424 priority Critical patent/US12175042B2/en
Publication of WO2022267141A1 publication Critical patent/WO2022267141A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • 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
    • 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
    • G02F1/13338—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
    • 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
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F39/00—Integrated devices, or assemblies of multiple devices, comprising at least one element covered by group H10F30/00, e.g. radiation detectors comprising photodiode arrays
    • H10F39/10—Integrated devices
    • H10F39/12—Image sensors
    • H10F39/198—Contact-type image sensors [CIS]

Definitions

  • the present application relates to the technical field of touch display, in particular to a display module.
  • Fingerprint recognition has been widely used as an identification method for mobile electronic devices. All of them adopt single-point fingerprint recognition.
  • the mainstream fingerprint recognition technologies are capacitive and optical.
  • Capacitive type is basically used in liquid crystal display module, which is usually located on the back, lower edge or side of the mobile phone. This method not only damages the aesthetics of the device, but also as the screen-to-body ratio continues to increase, there will be nowhere to place the capacitive fingerprint recognition module.
  • the optical type is basically applied to organic light-emitting diode display devices, and the identification area is located in the display area, which has good aesthetics.
  • the existing display module has the technical problem of being unable to identify large-area fingerprints.
  • the embodiment of the present application provides a display module, which can alleviate the technical problem that existing display modules cannot identify large-area fingerprints.
  • An embodiment of the present application provides a display module, including:
  • a cover plate the cover plate is arranged on the side of the display panel away from the backlight module, and the surface of the cover plate facing the display panel is provided with a reflective layer;
  • An identification component is arranged on the side of the display panel facing away from the cover plate, and is used to receive the reflected light after the end to be identified presses the surface of the cover plate;
  • the display module includes a central area and an edge area arranged around the central area, the touch light source is arranged in the edge area, and the cover plate is provided with a first grating on a side facing the touch light source, The first grating is arranged obliquely to the cover plate, the light emitted by the touch light source passes through the first grating, enters the cover plate to form refracted light, and the refracted light is generated in the cover plate total reflection.
  • the cover plate has a refractive index of n1
  • the reflective layer has a refractive index of n2
  • the end to be identified has a refractive index of n3.
  • the end to be identified can destroy the total reflection of light in the cover, and the angle ⁇ of the refracted light satisfies: arcsin(n2/n1) ⁇ arcsin(n3/n1).
  • the n3 is greater than the n2, and the n3 is greater than the n1.
  • the reflective layer has a lower refractive index than the cover plate.
  • the reflective layer is in any shape of solid, gaseous, or liquid.
  • the touch light source is arranged in the edge area, and the touch light source is arranged in alignment with the cover plate in the edge area.
  • a first collimation component is provided on the side of the touch light source facing the cover plate, and the first collimation component is used to converge the emitted light from the touch light source. of light.
  • the first collimation component may be at least one of a collimation grating or a prism structure.
  • the prism structure may be a convex lens or a concave lens.
  • the light output angle of the first collimation component is less than 42 degrees.
  • the refractive index of the preparation material of the first collimation component is greater than 1.6.
  • a light-shielding layer is provided on the surface of the cover plate facing the touch light source, and the first grating is arranged on the back of the light-shielding layer. to the side surface of the cover plate.
  • the touch light source is a Mini LED light board or a Micro LED light board.
  • the light panel width of the touch light source is less than or equal to 0.6 mm.
  • the touch light source is an infrared light source.
  • the preparation material of the light-shielding layer is infrared-transmissible black ink.
  • the second collimation component is provided on a side of the identification component facing the cover plate.
  • the end to be identified is a finger
  • the identification component is a fingerprint sensor
  • the end to be identified is a stylus.
  • the first collimation component is a first prism structure or a second grating
  • the second collimation component is a second prism structure or a third grating
  • the first collimation component is a second prism structure or a third grating.
  • a prism structure, the second prism structure, the second grating, and the third grating are all used to converge light.
  • the display module provided in the embodiment of the present application includes a touch light source, a display panel, a cover plate, and an identification component.
  • the cover plate is arranged on the side of the display panel away from the backlight module, and the cover plate faces the One side surface of the display panel is provided with a reflective layer, and the identification component is arranged on the side of the display panel facing away from the cover plate to receive the reflected light after the end to be identified presses the surface of the cover plate, wherein the The display module includes a central area and an edge area arranged around the central area, the touch light source is arranged in the edge area, a first grating is arranged on the side of the cover plate facing the touch light source, and the first The grating is arranged obliquely to the cover plate, the light emitted by the touch light source passes through the first grating, enters the cover plate to form refracted light, and the refracted light is totally reflected in the cover plate; A first grating is set on the surface of the cover plate facing the
  • FIG. 1 is a schematic cross-sectional view of a display module provided by an embodiment of the present application
  • Fig. 2 is a schematic diagram of the film layer of the first grating preparation method provided by the embodiment of the present application;
  • Fig. 3 is a flow chart of the first grating preparation method provided by the embodiment of the present application.
  • An embodiment of the present application provides a display module. Each will be described in detail below. It should be noted that the description sequence of the following embodiments is not intended to limit the preferred sequence of the embodiments.
  • the display module 1 provided by the embodiment of the present application includes a touch light source 10 , a display panel 20 , a cover 30 , and an identification component 40 .
  • the cover 30 is arranged on the display panel 20 away from the backlight.
  • the cover plate 30 is provided with a reflective layer 50 on the surface facing the display panel 20, and the identification component 40 is provided on the side of the display panel 20 facing away from the cover plate 30, It is used to receive the reflected light after the end to be identified presses the surface of the cover plate 30, wherein the display module 1 includes a central area 100, an edge area 110 arranged around the central area 100, and the touch light source 10 is arranged on the edge Area 110, the cover plate 30 is provided with a first grating 60 on the side facing the touch light source 10, the first grating 60 is arranged obliquely to the cover plate 30, the light emitted by the touch light source 10 passes through After the first grating 60 , it enters the cover 30 to form refracted light, and the refracted light is totally reflected in the cover 30 .
  • the first grating 60 on the surface of the cover 30 facing the touch light source 10
  • the light entering the cover 30 is totally reflected, and the light propagates in the cover 30 until the end to be identified touches
  • the surface of the cover plate 30 destroys the total reflection, and the light is reflected by the terminal to be identified to the identification component 40, so that the entire surface of the display module 1 can be used to extract information from the terminal to be identified.
  • the first grating 60 is used to make the light emitted by the touch light source 10 incident on the cover 30 at a specific angle, and the light is totally reflected in the cover 30 .
  • the reflective layer 50 is used for total reflection of the light inside the cover plate 30 .
  • the reflective layer 50 can be made of any material with a lower refractive index than the cover plate 30 .
  • the reflective layer 50 can be in the form of solid, gaseous, liquid, etc., and is used to maintain total reflection of light in the cover plate 30, and the reflective layer can maintain a certain angle of incident into the cover plate. The light is totally reflected by the reflective layer, and the totally reflected light will not pass through from one side of the reflective layer.
  • the cover plate 30 has a refractive index of n1
  • the reflective layer 50 has a refractive index of n2
  • the end to be identified has a refractive index of n3.
  • the end to be identified presses the cover plate 30 at any position, the end to be identified can destroy the total reflection of light in the cover 30, and the angle ⁇ of the refracted light satisfies: arcsin(n2/n1) ⁇ arcsin(n3/n1).
  • the end to be identified may be a finger.
  • the terminal to be identified may also be a stylus.
  • the n3 is greater than the n2, and the n3 is greater than the n1.
  • the n2 may be equal to the n1.
  • the refractive index of the end to be identified needs to be greater than the refractive index of the reflective layer 50 , so that the light can be kept in the cover plate 30 for total reflection.
  • the touch light source 10 is disposed on the edge area 110 , and the touch light source 10 is aligned with the cover plate 30 of the edge area 110 .
  • the touch light source 10 may be an infrared light source.
  • the touch light source 10 is provided with a first collimation component 80 on the side facing the cover plate 30, and the first collimation component 80 is used to converge the light emitted by the touch light source 10. light.
  • the first collimating component 80 may be at least one of a collimating grating or a prism structure.
  • the prism structure may be a convex lens.
  • the prism structure may also be a concave lens.
  • the light output angle of the touch light source 10 is converged to a certain range through the first collimation component 80, so that the light from the touch light source 10 will not be totally reflected to the identification component 40, causing interference .
  • the light output angle of the first collimation component 80 is less than 42 degrees.
  • the critical total reflection angle between the cover plate 30 and air is 42 degrees.
  • the light emission angle of the light passing through the first collimating component 80 is limited within 42 degrees, so that the light of the touch light source 10 will not be totally reflected to the identification component 40, and the total damage of the touch light source 10 can be avoided.
  • the interference of reflected light on the recognition component 40 is limited within 42 degrees, so that the light of the touch light source 10 will not be totally reflected to the identification component 40, and the total damage of the touch light source 10 can be avoided.
  • the material of the first collimation component 80 has a refractive index greater than 1.6.
  • a light-shielding layer 70 is disposed on the surface of the cover plate 30 facing the touch light source 10 , and the first grating 60 is disposed on the back of the light-shielding layer 70 . to the side surface of the cover plate 30 .
  • the light shielding layer 70 is disposed on the edge area 110 .
  • the light-shielding layer 70 is arranged in alignment with the touch light source 10 .
  • the light-shielding layer 70 is used to block the ambient light from entering the display module 1 and affecting the touch light source 10 and the identification component 40 .
  • the preparation material of the light-shielding layer 70 is infrared-transmissible black ink.
  • the light-shielding layer 70 only blocks ambient light, and can transmit infrared light from the touch light source 10 .
  • the light-shielding layer 70 blocks ambient light, it does not affect the light of the touch light source 10 from entering the cover 30 , thereby avoiding the phenomenon of abnormal touch display.
  • the second alignment component 90 is disposed on a side of the identification component 40 facing the cover plate 30 .
  • the second collimating component 90 is used to converge the light reflected by the end to be identified.
  • the end to be identified is a finger
  • the identification component 40 is a fingerprint sensor
  • the finger when the finger presses any position, the finger is equivalent to a light source, the finger includes ridges and valleys, there is no air gap between the ridges and the cover 30, more light will enter the fingerprint sensor, and the valleys and the cover 30 have no air gap. There is an air gap between the boards 30, so the light entering the fingerprint sensor is weak, forming biometric information with bright ridges and dark valleys.
  • the infrared light carrying fingerprint information enters the interior of the lower screen, and then reaches the fingerprint sensor through the second collimated optical path.
  • the light received by the identification component is more convergent, and the effect of receiving information by the identification component is improved.
  • the first collimation component 80 is a first prism structure or a second grating
  • the second collimation component 90 is a second prism structure or a third grating
  • the first prism structure, The second prism structure, the second grating, and the third grating are all used to converge light.
  • the display panel 20 is a liquid crystal display panel 20 .
  • the liquid crystal display panel 20 can be penetrated by infrared light.
  • the display module 1 further includes a reflection sheet, a diffusion sheet, and a brightness enhancement film.
  • the display module 1 further includes a backlight module.
  • the display panel 20 is an OLED display panel 20 .
  • the display module 1 can be penetrated by infrared light.
  • the touch light source 10 is an infrared light source, and the touch light source 10 can use a Mini LED light board or a Micro LED light board, and the light board width of the touch light source 10 does not exceed 0.6mm.
  • the width of the touch light source 10 is limited to realize a narrow border display.
  • the first grating preparation method provided by the present application includes:
  • the display module includes a touch light source, a display panel, a cover plate, and an identification component.
  • the cover plate is arranged on the side of the display panel away from the backlight module, and the cover plate faces the display
  • One side surface of the panel is provided with a reflective layer
  • the identification component is arranged on the side of the display panel facing away from the cover plate to receive the reflected light after the end to be identified presses the surface of the cover plate, wherein the display
  • the module includes a central area and an edge area arranged around the central area, the touch light source is arranged in the edge area, a first grating is arranged on the side of the cover plate facing the touch light source, and the first grating Set obliquely to the cover plate, the light emitted by the touch light source passes through the first grating, enters the cover plate to form refracted light, and the refracted light is totally reflected in the cover plate;
  • a first grating is arranged on the surface of the cover plate facing the touch light source,

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Human Computer Interaction (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Multimedia (AREA)
  • Image Input (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

一种显示模组（1），显示模组（1）包括盖板（30）、反射层（50），显示模组（1）的边缘区域（110）设置有触控光源（10），盖板（30）朝向触控光源（10）的一侧设置有第一光栅（60），第一光栅（60）倾斜于盖板（30）设置；触控光源（10）发出的光线经过第一光栅（60）后，进入盖板（30）内发生全反射，直到待识别端接触盖板（30）表面后破坏全反射，实现了显示模组（1）整面均能进行待识别端的信息提取。

Description

显示模组 技术领域
本申请涉及触控显示技术领域，具体涉及一种显示模组。
背景技术
指纹识别作为移动电子设备的身份识别方式已得到广泛应用均采用的是单点式指纹识别工作方式，主流的指纹识别技术为电容式和光学式。电容式基本上应用于液晶显示模组，通常位于手机背面、下边缘或侧面。这种方式不但有损设备的美观性，且随着屏占比的不断提升，电容式指纹识别模组将无处放置。光学式基本上应用于有机发光二极管显示设备，识别区域位于显示区，具有良好的美观性。虽然以上两种方案目前已得到广泛应用，但指纹识别只能固定在特定的小区域范围内，在操作上欠缺便捷性，为提升产品市场竞争水平，亟需开发光学式大面积指纹识别技术。
技术问题
因此，现有显示模组存在无法大面积指纹识别的技术问题。
技术解决方案
本申请实施例提供一种显示模组，可以缓解现有显示模组存在无法大面积指纹识别的技术问题。
本申请实施例提供一种显示模组，包括：
触控光源；
显示面板；
盖板，所述盖板设置于所述显示面板远离所述背光模组的一侧，所述盖板朝向所述显示面板的一侧表面设置有反射层；
识别组件，所述识别组件设置于所述显示面板背向所述盖板的一侧，用于接收待识别端按压盖板表面后的反射光；
其中，所述显示模组包括中心区域、围绕中心区域设置的边缘区域，所述 触控光源设置于所述边缘区域，所述盖板朝向所述触控光源的一侧设置有第一光栅，所述第一光栅倾斜于所述盖板设置，所述触控光源发出的光线经过所述第一光栅后，进入所述盖板内形成折射光线，所述折射光线在所述盖板内发生全反射。
可选的，在本申请的一些实施例中，所述盖板的折射率为n1，所述反射层的折射率为n2，所述待识别端的折射率为n3，当所述待识别端按压所述盖板任意位置时，待识别端能够破坏所述盖板内光线的全反射，所述折射光线的角度α满足：arcsin(n2/n1)≤α<arcsin(n3/n1)。
可选的，在本申请的一些实施例中，所述n3大于所述n2，且所述n3大于所述n1。
可选的，在本申请的一些实施例中，所述反射层的折射率低于所述盖板的折射率。
可选的，在本申请的一些实施例中，所述反射层为固态、气态、液态中的任一种形状。
可选的，在本申请的一些实施例中，所述触控光源设置于所述边缘区域，且所述触控光源与所述边缘区域的所述盖板对位设置。
可选的，在本申请的一些实施例中，所述触控光源朝向所述盖板的一侧设置有第一准直组件，所述第一准直组件用于收敛所述触控光源发出的光线。
可选的，在本申请的一些实施例中，所述第一准直组件可以为准直光栅或棱镜结构中的至少一种构成。
可选的，在本申请的一些实施例中，所述棱镜结构可以为凸透镜或凹透镜。
可选的，在本申请的一些实施例中，当所述盖板的折射率为1.5时，所述第一准直组件的出光角度小于42度。
可选的，在本申请的一些实施例中，所述第一准直组件的制备材料的折射率大于1.6。
可选的，在本申请的一些实施例中，在所述边缘区域，所述盖板朝向所述触控光源的一侧表面设置有遮光层，所述第一光栅设置于所述遮光层背向所述盖板的一侧表面。
可选的，在本申请的一些实施例中，所述触控光源为Mini LED灯板或Micro  LED灯板。
可选的，在本申请的一些实施例中，所述触控光源的灯板宽度小于等于0.6毫米。
可选的，在本申请的一些实施例中，所述触控光源为红外光源。
可选的，在本申请的一些实施例中，所述遮光层的制备材料为红外线可穿透的黑色油墨。
可选的，在本申请的一些实施例中，在所述识别组件朝向所述盖板的一侧设置有所述第二准直组件。
可选的，在本申请的一些实施例中，所述待识别端为手指，所述识别组件为指纹传感器。
可选的，在本申请的一些实施例中，所述待识别端为触控笔。
可选的，在本申请的一些实施例中，所述第一准直组件为第一棱镜结构或第二光栅，所述第二准直组件为第二棱镜结构或第三光栅，所述第一棱镜结构、所述第二棱镜结构、所述第二光栅、所述第三光栅均用于收敛光线。
有益效果
本申请实施例提供的显示模组包括触控光源、显示面板、盖板、识别组件，所述盖板设置于所述显示面板远离所述背光模组的一侧，所述盖板朝向所述显示面板的一侧表面设置有反射层，所述识别组件设置于所述显示面板背向所述盖板的一侧，用于接收待识别端按压盖板表面后的反射光，其中，所述显示模组包括中心区域、围绕中心区域设置的边缘区域，所述触控光源设置于所述边缘区域，所述盖板朝向所述触控光源的一侧设置有第一光栅，所述第一光栅倾斜于所述盖板设置，所述触控光源发出的光线经过所述第一光栅后，进入所述盖板内形成折射光线，所述折射光线在所述盖板内发生全反射；通过在盖板朝向触控光源的一侧表面设置第一光栅，使进入盖板的光线全反射，光线一直在盖板内传播，直到待识别端接触所述盖板的表面后破坏全反射，光线被待识别端反射至识别组件，实现了显示模组整面均能进行待识别端的信息提取。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的显示模组的截面示意图；
图2是本申请实施例提供的第一光栅制备方法的膜层示意图；
图3是本申请实施例提供的第一光栅制备方法的流程图。
本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。在本申请中，在未作相反说明的情况下，使用的方位词如“上”和“下”通常是指装置实际使用或工作状态下的上和下，具体为附图中的图面方向；而“内”和“外”则是针对装置的轮廓而言的。
本申请实施例提供一种显示模组。以下分别进行详细说明。需说明的是，以下实施例的描述顺序不作为对实施例优选顺序的限定。
如图1所示，本申请实施例提供的显示模组1包括触控光源10、显示面板20、盖板30、识别组件40，所述盖板30设置于所述显示面板20远离所述背光模组的一侧，所述盖板30朝向所述显示面板20的一侧表面设置有反射层50，所述识别组件40设置于所述显示面板20背向所述盖板30的一侧，用于接收待识别端按压盖板30表面后的反射光，其中，所述显示模组1包括中心区域100、围绕中心区域100设置的边缘区域110，所述触控光源10设置于所述边缘区域110，所述盖板30朝向所述触控光源10的一侧设置有第一光栅60，所述第一光栅60倾斜于所述盖板30设置，所述触控光源10发出的光线经过所述第一光栅60后，进入所述盖板30内形成折射光线，所述折射光线在所述盖板30内发生 全反射。
在本实施例中，通过在盖板30朝向触控光源10的一侧表面设置第一光栅60，使进入盖板30的光线全反射，光线一直在盖板30内传播，直到待识别端接触所述盖板30的表面后破坏全反射，光线被待识别端反射至识别组件40，实现了显示模组1整面均能进行待识别端的信息提取。
其中，所述第一光栅60用于将触控光源10发出的光线以特定的角度入射至盖板30，光线在盖板30内发生全反射。
其中，所述反射层50用于使盖板30内光线的全反射。
在一种实施例中，所述反射层50可以为任一折射率低于所述盖板30的材料制备得到。
在本实施例中，所述反射层50可以为固态、气态、液态等形态，用于使光线在所述盖板30内保持全反射，所述反射层能起到维持一定角度入射盖板内的光线被反射层全反射，全反射光线不会从反射层一侧透过。
在一种实施例中，所述盖板30的折射率为n1，所述反射层50的折射率为n2，所述待识别端的折射率为n3，当所述待识别端按压所述盖板30任意位置时，待识别端能够破坏所述盖板30内光线的全反射，所述折射光线的角度α满足：arcsin(n2/n1)≤α<arcsin(n3/n1)。
其中，所述待识别端可以为手指。
其中，所述待识别端还可以为触控笔。
其中，所述n3大于所述n2，且所述n3大于所述n1。
其中，所述n2可以等于所述n1。
在本实施例中，所述待识别端的折射率需大于所述反射层50的折射率，光线才能维持在盖板30内进行全反射。
在一种实施例中，所述触控光源10设置于所述边缘区域110，且所述触控光源10与所述边缘区域110的所述盖板30对位设置。
其中，所述触控光源10可以为红外光源。
在一种实施例中，所述触控光源10朝向所述盖板30的一侧设置有第一准直组件80，所述第一准直组件80用于收敛所述触控光源10发出的光线。
其中，所述第一准直组件80可以为准直光栅或棱镜结构中的至少一种构成。
其中，所述棱镜结构可以为凸透镜。
其中，所述棱镜结构也可以为凹透镜。
在本实施例中，所述触控光源10的出光角度通过所述第一准直组件80进行收敛至一定范围内，使触控光源10的光线不会被全反射到识别组件40，造成干扰。
在一种实施例中，当所述盖板30的折射率为1.5时，所述第一准直组件80的出光角度小于42度。
其中，当所述盖板30的折射率为1.5时，盖板30与空气的临界全反射角为42度。
在本实施例中，将经过第一准直组件80光线的出光角度限定在42度内，可以使触控光源10的光线不会被全反射到识别组件40，避免了触控光源10的全反射光线对识别组件40的干扰。
在一种实施例中，所述第一准直组件80的制备材料的折射率大于1.6。
在一种实施例中，在所述边缘区域110，所述盖板30朝向所述触控光源10的一侧表面设置有遮光层70，所述第一光栅60设置于所述遮光层70背向所述盖板30的一侧表面。
其中，所述遮光层70设置在所述边缘区域110。
其中，所述遮光层70与所述触控光源10对位设置。
在本实施例中，所述遮光层70用于遮挡所环境光进入到所述显示模组1内，对触控光源10和识别组件40等造成影响。
在一种实施例中，所述遮光层70的制备材料为红外线可穿透的黑色油墨。
其中，所述遮光层70仅遮挡环境光，能透过触控光源10的红外光线。
在本实施例中，所述遮光层70阻挡环境光的同时，不影响所述触控光源10的光线进入到所述盖板30内，避免了触控显示异常的现象。
在一种实施例中，在所述识别组件40朝向所述盖板30的一侧设置有所述第二准直组件90。
其中，所述第二准直组件90用于收敛待识别端反射的光线。
在一种实施例中，所述待识别端为手指，所述识别组件40为指纹传感器。
其中，当手指按压任意位置时，手指相当于一个发光源，手指包括脊处和 谷处，脊处与盖板30之间无空气间隙，会有较多光线进入指纹传感器，而谷处与盖板30之间有空气间隙，因此进入指纹传感器的光线较弱，形成脊亮谷暗的生物特征信息，携带指纹信息的红外光进入下方屏幕内部，进而通过第二准直光路到达指纹传感器。
在本实施例中，通过设置第二准直组件，使识别组件接收到的光线更加收敛，提升识别组件对信息的接收效果。
在一种实施例中，所述第一准直组件80为第一棱镜结构或第二光栅，所述第二准直组件90为第二棱镜结构或第三光栅，所述第一棱镜结构、所述第二棱镜结构、所述第二光栅、所述第三光栅均用于收敛光线。
在一种实施例中，所述显示面板20为液晶显示面板20。
其中，所述液晶显示面板20可以被红外光穿透。
其中，所述显示模组1还包括反射片、扩散片、增亮膜。
其中，所述显示模组1还包括背光模组。
在一种实施例中，所述显示面板20为OLED显示面板20。
其中，由于OLED显示面板20无需设置背光模组，显示模组1可以被红外光穿透。
在一种实施例中，所述触控光源10为红外光源，所述触控光源10可以采用Mini LED灯板或者Micro LED灯板，所述触控光源10的灯板宽度不超过0.6mm。
在本实施例中，限定触控光源10的宽度，可以实现窄边框显示。
如图2、图3所示，本申请提供的第一光栅制备方法包括：
S1:提供一盖板；
S2:在所述盖板的一侧涂布遮光材料，制备得到遮光层；
S3:在所述遮光层远离所述盖板的一侧表面涂布一层树脂材料形成树脂层；
S4:对所述树脂层脱模后采用紫外光照射制备得到第一光栅。
本实施例提供的显示模组包括触控光源、显示面板、盖板、识别组件，所述盖板设置于所述显示面板远离所述背光模组的一侧，所述盖板朝向所述显示面板的一侧表面设置有反射层，所述识别组件设置于所述显示面板背向所述盖 板的一侧，用于接收待识别端按压盖板表面后的反射光，其中，所述显示模组包括中心区域、围绕中心区域设置的边缘区域，所述触控光源设置于所述边缘区域，所述盖板朝向所述触控光源的一侧设置有第一光栅，所述第一光栅倾斜于所述盖板设置，所述触控光源发出的光线经过所述第一光栅后，进入所述盖板内形成折射光线，所述折射光线在所述盖板内发生全反射；通过在盖板朝向触控光源的一侧表面设置第一光栅，使进入盖板的光线全反射，光线一直在盖板内传播，直到待识别端接触所述盖板的表面后破坏全反射，光线被待识别端反射至识别组件，实现了显示模组整面均能进行待识别端的信息提取。
以上对本申请实施例所提供的一种显示模组进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种显示模组，其包括：
    触控光源；
    显示面板；
    盖板，所述盖板设置于所述显示面板远离所述背光模组的一侧，所述盖板朝向所述显示面板的一侧表面设置有反射层；
    识别组件，所述识别组件设置于所述显示面板背向所述盖板的一侧，用于接收待识别端按压盖板表面后的反射光；
    其中，所述显示模组包括中心区域、围绕中心区域设置的边缘区域，所述触控光源设置于所述边缘区域，所述盖板朝向所述触控光源的一侧设置有第一光栅，所述第一光栅倾斜于所述盖板设置，所述触控光源发出的光线经过所述第一光栅后，进入所述盖板内形成折射光线，所述折射光线在所述盖板内发生全反射。
  2. 如权利要求1所述的显示模组，其中，所述盖板的折射率为n1，所述反射层的折射率为n2，所述待识别端的折射率为n3，当所述待识别端按压所述盖板任意位置时，待识别端能够破坏所述盖板内光线的全反射，所述折射光线的角度α满足：arcsin(n2/n1)≤α<arcsin(n3/n1)。
  3. 如权利要求2所述的显示模组，其中，所述n3大于所述n2，且所述n3大于所述n1。
  4. 如权利要求3所述的显示模组，其中，所述反射层的折射率低于所述盖板的折射率。
  5. 如权利要求2所述的显示模组，其中，所述反射层为固态、气态、液态中的任一种形状。
  6. 如权利要求2所述的显示模组，其中，所述触控光源设置于所述边缘区域，且所述触控光源与所述边缘区域的所述盖板对位设置。
  7. 如权利要求6所述的显示模组，其中，所述触控光源朝向所述盖板的一侧设置有第一准直组件，所述第一准直组件用于收敛所述触控光源发出的光线。
  8. 如权利要求7所述的显示模组，其中，所述第一准直组件可以为准直光 栅或棱镜结构中的至少一种构成。
  9. 如权利要求8所述的显示模组，其中，所述棱镜结构可以为凸透镜或凹透镜。
  10. 如权利要求7所述的显示模组，其中，当所述盖板的折射率为1.5时，所述第一准直组件的出光角度小于42度。
  11. 如权利要求7所述的显示模组，其中，所述第一准直组件的制备材料的折射率大于1.6。
  12. 如权利要求7所述的显示模组，其中，在所述边缘区域，所述盖板朝向所述触控光源的一侧表面设置有遮光层，所述第一光栅设置于所述遮光层背向所述盖板的一侧表面。
  13. 如权利要求12所述的显示模组，其中，所述触控光源为Mini LED灯板或Micro LED灯板。
  14. 如权利要求13所述的显示模组，其中，所述触控光源的灯板宽度小于等于0.6毫米。
  15. 如权利要求2所述的显示模组，其中，所述触控光源为红外光源。
  16. 如权利要求15所述的显示模组，其中，所述遮光层的制备材料为红外线可穿透的黑色油墨。
  17. 如权利要求7所述的显示模组，其中，在所述识别组件朝向所述盖板的一侧设置有所述第二准直组件。
  18. 如权利要求17所述的显示模组，其中，所述待识别端为手指，所述识别组件为指纹传感器。
  19. 如权利要求17所述的显示模组，其中，所述待识别端为触控笔。
  20. 如权利要求17所述的显示模组，其中，所述第一准直组件为第一棱镜结构或第二光栅，所述第二准直组件为第二棱镜结构或第三光栅，所述第一棱镜结构、所述第二棱镜结构、所述第二光栅、所述第三光栅均用于收敛光线。
PCT/CN2021/107691 2021-06-22 2021-07-21 显示模组 Ceased WO2022267141A1 (zh)

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