WO2020156320A1 - 终端设备 - Google Patents

终端设备 Download PDF

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Publication number
WO2020156320A1
WO2020156320A1 PCT/CN2020/073194 CN2020073194W WO2020156320A1 WO 2020156320 A1 WO2020156320 A1 WO 2020156320A1 CN 2020073194 W CN2020073194 W CN 2020073194W WO 2020156320 A1 WO2020156320 A1 WO 2020156320A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
display screen
terminal device
fingerprint sensor
optical fingerprint
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/CN2020/073194
Other languages
English (en)
French (fr)
Inventor
谢祥
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.)
Vivo Mobile Communication Co Ltd
Original Assignee
Vivo Mobile Communication 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 Vivo Mobile Communication Co Ltd filed Critical Vivo Mobile Communication Co Ltd
Priority to ES20749287T priority Critical patent/ES2989901T3/es
Priority to EP20749287.7A priority patent/EP3920086B1/en
Priority to KR1020217027449A priority patent/KR102693713B1/ko
Priority to JP2021544667A priority patent/JP7315688B2/ja
Publication of WO2020156320A1 publication Critical patent/WO2020156320A1/zh
Priority to US17/390,478 priority patent/US11893822B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G02F1/13312—Circuits comprising photodetectors for purposes other than feedback
    • 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 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

Definitions

  • the present disclosure relates to the technical field of communication equipment, and in particular to a terminal device.
  • the fingerprint recognition module not only improves the security performance of the terminal equipment, but also is convenient.
  • the user's use for example, the user uses a fingerprint recognition module to perform payment confirmation and other operations.
  • the optical fingerprint recognition module is a commonly used recognition module.
  • the current optical fingerprint recognition module is usually set in the area covered by the display screen of the terminal device, and the user's finger placement area is set on the display screen.
  • some display screens used in terminal equipment need to be equipped with backlight components.
  • a light-transmitting area needs to be opened on the backlight component.
  • the light-transmitting area usually has a larger area to ensure Enough light is projected into the optical fingerprint recognition module to be sensed.
  • a large light-transmitting area will affect the backlight effect of the backlight assembly.
  • the present disclosure discloses a terminal device to solve the problem of a large light-transmitting area on a backlight assembly in a terminal device with an optical fingerprint recognition module disposed under the display screen, which will lead to a poor backlight effect.
  • a terminal device includes a display module, an optical fingerprint sensor, at least two backlight assemblies, and a light emitter.
  • the display module includes a display screen and a transparent cover plate covering the display screen.
  • the light emitter And the display screen are both fixed on the inner surface of the transparent cover plate
  • the optical fingerprint sensor is arranged on the side of the display screen facing away from the transparent cover plate
  • the at least two backlight assemblies are arranged in sequence Between the display screen and the optical fingerprint sensor, in the direction from the display screen to the optical fingerprint sensor, the areas of the light-transmitting regions of the at least two backlight assemblies are sequentially reduced, and the light emitter After the emitted light passes through the finger, it sequentially passes through the display module and each of the light-transmitting areas and is projected on the optical fingerprint sensor.
  • the area of the light-transmitting area of each backlight assembly is gradually reduced, the area of the light-transmitting area of the backlight assembly closer to the display screen of the two adjacent backlight assemblies is larger, which can make the light Most of the light is projected toward the direction close to the optical fingerprint sensor.
  • the backlight assembly closer to the optical fingerprint sensor is transparent.
  • the area of the light area is small. In this case, the backlight assembly with the smaller light-transmitting area area can supplement the light-transmitting area of the backlight assembly with the larger light-transmitting area, thereby avoiding the The problem of poor backlight effect caused by larger area.
  • FIG. 1 is a schematic diagram of a part of the structure of a terminal device disclosed in an embodiment of the disclosure
  • FIG. 2 is a schematic diagram of a specific partial structure of a terminal device disclosed in an embodiment of the disclosure
  • FIG. 3 is a schematic diagram of another specific partial structure of a terminal device disclosed in an embodiment of the disclosure.
  • FIG. 4 is a schematic diagram of a specific structure of the partial structure in FIG. 3.
  • Fig. 5 is a schematic diagram of the dispersion of the prism structure facing the light.
  • 300-backlight assembly 310-transmission area, 311-transmission hole, 320-shading ring, 330-first brightness enhancement film, 340-second brightness enhancement film, 350-diffusion film, 351-first avoidance hole, 360- Light guide plate, 370-reflective film, 371-second avoidance hole, 380-support frame,
  • 500-backlight assembly 510-transmission area, 511-transmission hole, 520-shading ring, 530-first brightness enhancement film, 540-second brightness enhancement film, 550-diffusion film, 551-first avoidance hole, 560- Light guide plate, 570-reflective film, 571-second escape hole;
  • a-film body a-film body, b-adhesive layer, c-prism structure surface.
  • the embodiments of the present disclosure disclose a terminal device.
  • the disclosed terminal device includes a display module 100, an optical fingerprint sensor 200, at least two backlight assemblies 300 and a light emitter 400.
  • the display module 100 is a display component of a terminal device.
  • the display module 100 includes a display screen 110 and a light-transmitting cover 120.
  • the light-transmitting cover 120 covers the display 110.
  • the light-transmitting cover 120 can play a role in the display 110.
  • the transparent cover 120 is fixed on the display screen 110 through an optical adhesive layer.
  • the light-transmitting cover 120 is made of light-transmitting materials, and therefore does not affect the display of the display screen 110.
  • the transparent cover 120 may be a glass cover or a transparent resin cover, and the specific material of the transparent cover 120 is not limited in the embodiment of the present disclosure.
  • the transparent cover 120 can also provide an installation location for the light emitter 400.
  • the light emitter 400 and the display screen 110 are both arranged on the inner surface of the light-transmitting cover 120.
  • the light-transmitting cover 120 has an extending edge
  • the light emitter 400 is arranged on the extending edge of the light-transmitting cover 120
  • the light emitter 400 is located on one side of the display screen 110.
  • the light emitter 400 may also be fixed on the inner surface of the transparent cover 120 by bonding.
  • the light emitter 400 is used to emit light, and the light-transmitting cover 120 has a finger placement area. The light emitted by the light emitter 400 can pass through the light-transmitting cover 120 and be projected onto the finger placement area.
  • the inner surface of the transparent cover 120 refers to the surface of the transparent cover 120 facing the inner cavity of the terminal device, that is, the surface where the transparent cover 120 is connected to the display screen 110.
  • the optical fingerprint sensor 200 is arranged on the side of the display screen 110 facing away from the transparent cover 120, and the at least two backlight assemblies 300 are arranged in turn between the display screen 110 and the optical fingerprint sensor 200.
  • Each backlight assembly Used to provide backlighting. In the direction from the display screen 110 to the optical fingerprint sensor 200, the areas of the light-transmitting regions of the at least two backlight assemblies are sequentially reduced.
  • the light emitted from the skin of the finger to the finger placement area passes through the display module 100 and each light-transmitting area in turn, and is projected onto the optical fingerprint sensor 200, and finally the optical fingerprint sensor 200 performs fingerprint identification.
  • the light emitted by the light emitter 400 first penetrates the skin and enters the phalanx, and then is emitted from the skin of the finger under the reflection of the phalanx. Due to the existence of fingerprints on the fingers, the structure of the fingerprints during the light emission process There are differences in the refraction of light, and eventually light that can reflect the shape of the fingerprint is sensed by the optical fingerprint sensor 200 after sequentially passing through the display module 100 and each light-transmitting area.
  • the principle and process of the optical fingerprint sensor 200 for sensing fingerprints are well-known technologies and will not be repeated here.
  • the distance between the light emitter 400 and the optical fingerprint sensor 200 in the direction perpendicular to the display 110 projection can be 5-15mm. After verification, this distance range can ensure that the light emitter 400 is well equipped.
  • the light projection effect of the optical fingerprint sensor 200 can also achieve a good fingerprint recognition effect.
  • the light gradually converges in the process of sequentially passing through the display module 100 and each light-transmitting area.
  • the light-transmitting areas of the at least two backlight assemblies The area of the light is reduced in turn, and the light can finally be projected onto the optical fingerprint sensor 200 after passing through each light-transmitting area.
  • the area of the light-transmitting area of each backlight assembly is gradually reduced, the area of the light-transmitting area of the backlight assembly closer to the display screen 110 is larger among the two adjacent backlight assemblies. More light can be projected toward the optical fingerprint sensor 200. At the same time, since the light gradually converges as it approaches the optical fingerprint sensor 200, the two adjacent backlight assemblies are closer to the optical fingerprint sensor. The area of the light-transmitting area of the 200 backlight assembly is small. In this case, the backlight assembly with a smaller light-transmitting area area can supplement the light-transmitting area of the backlight assembly with a larger light-transmitting area. This can avoid the problem of poor backlight effect due to a large light-transmitting area.
  • the number of the backlight assembly can be two, and the two backlight assemblies will not cause the display module 100, the optical fingerprint sensor 200 and the backlight assembly to be stacked too high, and at the same time will achieve a good backlight effect.
  • the two backlight assemblies may include a backlight assembly 300 and a backlight assembly 500.
  • the backlight assembly 300 and the backlight assembly 500 are sequentially disposed between the display screen 110 and the optical fingerprint sensor 200.
  • the backlight assembly 300 may be disposed on a side of the display screen 110 away from the transparent cover 120, and the backlight assembly 300 provides backlight for the display module 100.
  • the backlight assembly 300 has a light-transmitting area 310, and the light emitted by the light emitter 400 can pass through the display screen 110 and the light-transmitting area 310 after being reflected by a finger.
  • the backlight assembly 300 itself cannot realize the light passing through.
  • the light-transmitting area 310 is provided on the backlight assembly 300, so that the light reflected by the finger can pass through the light-transmitting area 310.
  • the light-transmitting area 310 may be a light-transmitting hole 311 penetrating the backlight assembly 300.
  • the opening of the light-transmitting hole 311 can better allow the light reflected by the finger to enter the optical fingerprint sensor 200, and the light is transmitted.
  • the hole 311 can reduce the loss of light intensity during the transmission of light.
  • the backlight assembly 300 may include a light-shielding ring 320, a first light-enhancing film 330, a second light-enhancing film 340, a diffusion film 350, a light guide plate 360, and a reflection film 370 sequentially distributed in a direction away from the display screen 110.
  • a first escape hole 351 is opened at a portion of the diffusion film 350 opposite to the light-transmitting area 310, so as to prevent the diffusion film 350 from diffusing light.
  • the portion of the reflective film 370 opposite to the light-transmitting area 310 is provided with a second escape hole 371, so as to prevent the reflective film 370 from reflecting light.
  • the outer surfaces of the first brightness enhancement film 330, the second brightness enhancement film 340, and the light guide plate 360 opposite to the light-transmitting area 310 are flat surfaces facing the display screen 110.
  • the outer surfaces of the first brightness enhancement film 330, the second brightness enhancement film 340, and the light guide plate 360 are usually the prism structure surface c, as shown in FIG. 5, the prism structure surface c will disperse light (as shown by the arrows in FIG. 5). ), it will eventually make it difficult for light to converge into the optical fingerprint sensor 200.
  • the above-mentioned area of the first brightness enhancement film 330, the second brightness enhancement film 340, and the light guide plate 360 opposite to the light transmission area 310 is designed to be a flat surface facing the outside surface of the display screen 110, which can avoid the light dispersion effect of these portions.
  • the first brightness enhancement film 330 and the second brightness enhancement film 340 may each include a film body a and a glue layer b, the film body a facing the display screen 110
  • the surface may be a prism structure surface, and the adhesive layer b may be filled on the prism structure surface, and a part of the outer surface forms a plane.
  • the refractive index of the adhesive layer b can be equal to the refractive index of the film body a, which can undoubtedly further reduce the dispersion of light in the transmission process.
  • a support frame 380 may be arranged between the backlight assembly 300 and the backlight assembly 500.
  • the support frame 380 is a frame structure and will not affect the backlight assembly 500 and the optical fingerprint sensor. 200 jobs.
  • the support frame 380 may be a metal frame, such as an iron frame.
  • the transparent area 310 After passing through the transparent cover 120 and the display screen 110, the reflected light passes through the transparent area 310.
  • the transparent area 310 In order to project as much light onto the optical fingerprint sensor 200 as possible, the transparent area 310 usually has a larger area.
  • the backlight assembly 500 is disposed between the backlight assembly 300 and the optical fingerprint sensor 200.
  • the backlight assembly 500 has a light-transmitting area 510.
  • the projection of the light-transmitting area 510 in the light-sensing direction of the optical fingerprint sensor 200 is located between the light-transmitting area 310 Inside, the light passing through the light-transmitting area 310 can pass through the light-transmitting area 510 before being projected onto the optical fingerprint sensor 200.
  • the backlight assembly 500 is mainly used for supplementary backlighting at the light-transmitting area 310, and since the light gradually converges as it approaches the optical fingerprint sensor 200, the light-transmitting area 510 does not need to be provided with a larger area, and the area of the light-transmitting area 510 is smaller than the light-transmitting area.
  • the area of area 310 is mainly used for supplementary backlighting at the light-transmitting area 310, and since the light gradually converges as it approaches the optical fingerprint sensor 200, the light-transmitting area 510 does not need to be provided with a larger area, and the area of the light-transmitting area 510 is smaller than the light-transmitting area.
  • the area of area 310 is mainly used for supplementary backlighting at the light-transmitting area 310, and since the light gradually converges as it approaches the optical fingerprint sensor 200, the light-transmitting area 510 does not need to be provided with a larger area, and the area of the light-trans
  • the light-transmitting area 510 may be a light-transmitting hole 511 that penetrates the backlight assembly 500.
  • the light-transmitting hole 511 can undoubtedly make it easier for the light reflected by the finger to enter the optical fingerprint sensor 200, and the light-transmitting hole 511 can reduce the light transmission process. Loss of light intensity.
  • the backlight assembly 500 may include a light-shielding ring 520, a first light-increasing film 530, a second light-increasing film 540, a diffusion film 550, a light guide plate 560, and a reflective film 570 sequentially arranged between the backlight assembly 300 and the optical fingerprint sensor 200.
  • the portion of the diffusion film 550 opposite to the light-transmitting region 510 is provided with a first escape hole 551, thereby preventing the diffusion film 550 from diffusing light.
  • the portion of the reflective film 570 opposite to the light-transmitting area 510 is provided with a second escape hole 571, so as to prevent the reflective film 570 from reflecting light.
  • the opposite areas of the first light-enhancing film 530, the second light-enhancing film 540, and the light-transmitting area 510 on the light guide plate 560, and the outer surfaces facing the display screen 110 are all flat.
  • the structures of the first brightness enhancement film 330, the second brightness enhancement film 340, and the light guide plate 360 are similar.
  • the outer surfaces of the first brightness enhancement film 530, the second brightness enhancement film 540 and the light guide plate 560 are usually prism structure surfaces. The face will have a dispersion effect on the light, which will eventually cause the light to be more difficult to converge into the optical fingerprint sensor 200.
  • the area of the first brightness enhancement film 530, the second brightness enhancement film 540, and the light guide plate 560 opposite to the light-transmitting area 510 is designed to be a flat surface facing the outer side of the display screen 110, thereby enabling Avoid this part of the light dispersion.
  • the first brightness enhancement film 530 and the second brightness enhancement film 540 may include a film body a and a glue layer b, the film body a facing the display screen 110
  • the surface may be a prism structure surface, and the adhesive layer b may be filled on the prism structure surface, and a part of the outer surface forms a plane.
  • the refractive index of the adhesive layer b is equal to the refractive index of the film body a.
  • the thickness of the light guide plate 560 is relatively large, and it is easier to process the outer surface of the area opposite to the light-transmitting area 510 into a plane through the processing process.
  • the display screen 110 may be a TFT display screen, or may be another display screen that needs to be equipped with a backlight assembly.
  • the embodiment of the present disclosure does not limit the specific type of the display screen.
  • the terminal devices disclosed in the embodiments of the present disclosure may be devices such as smart phones, tablet computers, e-book readers, wearable devices (such as smart watches), game consoles, etc.
  • the embodiments of the present disclosure do not limit the specific types of terminal devices.

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Abstract

一种终端设备，包括显示模组（100）、光学指纹传感器（200）、至少两个背光组件（300，500）和光发射器（400），显示模组（100）包括显示屏（110）和覆盖在显示屏（110）上的透光盖板（120），光发射器（400）和显示屏（110）均固定在透光盖板（120）的内侧表面，光学指纹传感器（200）设置在显示屏（110）背离透光盖板（120）的一侧，至少两个背光组件（300，500）依次设置在显示屏（110）与光学指纹传感器（200）之间，在显示屏（110）到光学指纹传感器（200）的方向上，至少两个背光组件（300，500）的透光区域（310，510）的面积依次减小，光发射器（400）发射的光线经手指后，依次穿过显示模组（100）和各透光区域（310，510）且投射在光学指纹传感器（200）上。

Description

终端设备
相关申请的交叉引用
本申请主张在2019年1月31日在中国提交的中国专利申请号No.201910098786.8的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通讯设备技术领域，尤其涉及一种终端设备。
背景技术
随着用户需求的提升，终端设备的功能得到较大的发展，为了用户的安全，当前的终端设备通常设置有指纹识别模组，指纹识别模组不但提高了终端设备的安全性能，而且还方便用户的使用，例如用户采用指纹识别模组进行支付确认等操控。
光学指纹识别模组是较为常用的一种识别模组，为了方便操作，当前的光学指纹识别模组通常设置在终端设备的显示屏覆盖的区域中，用户的手指放置区域设置在显示屏上。通常情况下，终端设备采用的一些显示屏需要配置背光组件，为了能够确保光学指纹识别模组能够进行光学识别，背光组件上需要开设透光区域，透光区域通常开设的面积较大，进而确保有足够的光线投射到光学指纹识别模组中而被感应。但是面积较大的透光区域会影响背光组件的背光效果。
发明内容
本公开公开一种终端设备，以解决目前显示屏下方配置有光学指纹识别模组的终端设备中背光组件上的透光区域面积较大，会导致背光效果较差的问题。
为了解决上述问题，本公开采用下述技术方案：
一种终端设备，包括显示模组、光学指纹传感器、至少两个背光组件和光发射器，所述显示模组包括显示屏和覆盖在所述显示屏上的透光盖板，所 述光发射器和所述显示屏均固定在所述透光盖板的内侧表面，所述光学指纹传感器设置在所述显示屏背离所述透光盖板的一侧，所述至少两个背光组件依次设置在所述显示屏与所述光学指纹传感器之间，在所述显示屏到所述光学指纹传感器的方向上，所述至少两个背光组件的透光区域的面积依次减小，所述光发射器发射的光线经手指后，依次穿过所述显示模组和各所述透光区域且投射在所述光学指纹传感器上。
本公开采用的技术方案能够达到以下有益效果：
本公开公开的终端设备中，由于各背光组件的透光区域的面积逐渐减小，因此相邻的两个背光组件中，较为靠近显示屏的背光组件的透光区域面积较大，能够使得光线较多的向着靠近光学指纹传感器的方向投射，与此同时，由于光线在靠近光学指纹传感器的过程中逐渐汇集，因此，相邻的两个背光组件中，较为靠近光学指纹传感器的背光组件的透光区域的面积较小，此种情况下，该透光区域面积较小的背光组件，能够为透光区域面积较大的背光组件的透光区域进行一定的背光补充，从而能够避免由于透光区域较大导致的背光效果较差的问题。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开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公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本公开实施例公开的终端设备的部分结构示意图；
图2为本公开实施例公开的终端设备的一种具体局部的结构示意图；
图3为本公开实施例公开的终端设备的另一种具体局部的结构示意图；
图4为图3中的局部结构的具体结构示意图；以及
图5为棱镜结构面对光线产生的分散示意图。
附图标记说明：
100-显示模组、110-显示屏、120-透光盖板、
200-光学指纹传感器、
300-背光组件、310-透光区域、311-透光孔、320-遮光圈、330-第一增光膜、340-第二增光膜、350-扩散膜、351-第一避让孔、360-导光板、370-反射膜、371-第二避让孔、380-支撑框、
400-光发射器、
500-背光组件、510-透光区域、511-透光孔、520-遮光圈、530-第一增光膜、540-第二增光膜、550-扩散膜、551-第一避让孔、560-导光板、570-反射膜、571-第二避让孔；
a-膜本体、b-胶层、c-棱镜结构面。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合本公开具体实施例及相应的附图对本公开技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
以下结合附图，详细说明本公开各个实施例公开的技术方案。
请参考图1-图5，本公开实施例公开一种终端设备，所公开的终端设备包括显示模组100、光学指纹传感器200、至少两个背光组件300和光发射器400。
显示模组100为终端设备的显示组件，显示模组100包括显示屏110和透光盖板120，透光盖板120覆盖在显示屏110上，透光盖板120能够对显示屏110起到防护的作用。具体的，透光盖板120通过光学胶层固定在显示屏110上。透光盖板120由透光材料制成，因此不影响显示屏110的显示。例如，透光盖板120可以为玻璃盖板或透明树脂盖板，本公开实施例不限制透光盖板120的具体材质。当然，透光盖板120还可以为光发射器400提供安装位置。
光发射器400和显示屏110均设置在透光盖板120的内侧表面，通常情况下，透光盖板120具有外伸边缘，光发射器400设置在透光盖板120的外伸边缘上，光发射器400位于显示屏110的一侧。具体的，光发射器400也 可以通过粘接的方式固定在透光盖板120的内侧表面。本实施例中，光发射器400用于发射光线，透光盖板120上具有手指放置区域，光发射器400发射的光线可以穿过透光盖板120，投射到放置在手指放置区域上的手指上，光线透过手指的皮肤后被指骨反射后再从手指的皮肤射向手指放置区域。需要说明的是，透光盖板120的内侧表面指的是，透光盖板120朝向终端设备的内腔的表面，也就是透光盖板120与显示屏110相连的表面。
本实施例中，光学指纹传感器200设置在显示屏110背离透光盖板120的一侧，所述的至少两个背光组件300依次设置在显示屏110与光学指纹传感器200之间，各背光组件用于提供背光。在显示屏110到光学指纹传感器200的方向上，所述的至少两个背光组件的透光区域的面积依次减小。
从手指的皮肤射向手指放置区域的光线，会依次穿过显示模组100和各透光区域，并且投射到光学指纹传感器200上，最终由光学指纹传感器200进行指纹识别。如上文所述，光发射器400发射的光线先透过皮肤射入到指骨，在指骨的反射作用下再从手指的皮肤射出，由于手指的指纹存在，在光线射出的过程中指纹的结构使得光线的折射存在差异，最终将能够反映指纹形状的光线依次经过显示模组100和各透光区域后被光学指纹传感器200感应。光学指纹传感器200感应指纹的原理及过程为公知技术，在此不再赘述。
一种具体的实施方式中，光发射器400和光学指纹传感器200在垂直于显示屏110方向的投影之间的距离可以为5-15mm，经过验证，此距离范围能够确保光发射器400具备良好的光投射效果，同时还能实现光学指纹传感器200具备良好的指纹识别效果。
光线在依次穿过显示模组100和各透光区域的过程中逐渐汇集，本实施例中，在显示屏110到光学指纹传感器200的方向上，所述的至少两个背光组件的透光区域的面积依次减小，光线穿过各个透光区域后最终能够投射到光学指纹传感器200上。
本公开实施例公开的终端设备中，由于各背光组件的透光区域的面积逐渐减小，因此相邻的两个背光组件中，较为靠近显示屏110的背光组件的透光区域面积较大，能够使得光线较多的向着靠近光学指纹传感器200的方向投射，与此同时，由于光线在靠近光学指纹传感器200的过程中逐渐汇集， 因此，相邻的两个背光组件中，较为靠近光学指纹传感器200的背光组件的透光区域的面积较小，此种情况下，该透光区域面积较小的背光组件，能够为透光区域面积较大的背光组件的透光区域进行一定的背光补充，从而能够避免由于透光区域较大导致的背光效果较差的问题。
如上文所述，背光组件至少为两个。在一个具体的实施方案中，背光组件的数量可以为两个，两个背光组件不会导致显示模组100、光学指纹传感器200和背光组件的堆叠过高，同时还会达到良好的背光效果。
请再次参考图1-图5，两个背光组件可以包括背光组件300和背光组件500，背光组件300和背光组件500依次设置在显示屏110和光学指纹传感器200之间。
背光组件300可以设置在显示屏110背离透光盖板120的一侧，背光组件300为显示模组100提供背光。背光组件300具有透光区域310，光发射器400发射的光线可经手指的反射，穿过显示屏110和透光区域310。背光组件300本身无法实现光线的穿过，本实施例中，背光组件300上设置透光区域310，进而能够使得被手指反射的光线通过透光区域310。
在一个可选的方案中，透光区域310可以为贯穿背光组件300的透光孔311，透光孔311的开设，能够更好地使得经手指反射的光线进入光学指纹传感器200中，透光孔311能够减少光线在传递过程中光强的损失。
通常情况下，背光组件300可以包括朝着远离显示屏110的方向依次分布的遮光圈320、第一增光膜330、第二增光膜340、扩散膜350、导光板360和反射膜370。
扩散膜350与透光区域310相对的部位开设有第一避让孔351，进而能够防止扩散膜350对光线的扩散。反射膜370与透光区域310相对的部位开设有第二避让孔371，进而能够防止反射膜370对光线的反射。第一增光膜330、第二增光膜340和导光板360上与透光区域310相对区域，朝向显示屏110的外侧表面均为平面。
第一增光膜330、第二增光膜340和导光板360的外侧表面通常为棱镜结构面c，如图5所示，棱镜结构面c会对光线产生分散作用(如图5中的箭头所示)，最终会导致光线较难汇聚到光学指纹传感器200中。基于此，上述 将第一增光膜330、第二增光膜340和导光板360上与透光区域310相对区域，朝向显示屏110的外侧表面设计成平面，能够避免该部分对光线的分散作用。
实现第一增光膜330、第二增光膜340和导光板360外侧表面的局部设计成平面的方式有多种，可以在制造的过程中直接将相对应的区域制造成平面。当然，还可以通过其他方式实现上述目的。请参考图4，考虑到加工难易，在一个可选的实施方案中，第一增光膜330和第二增光膜340均可以包括膜本体a和胶层b，膜本体a朝向显示屏110的表面可以为棱镜结构面，胶层b可以填充在棱镜结构面上、且使得局部外侧表面形成平面。在一个可选的实施方案中，胶层b的折射率与膜本体a的折射率可以相等，这无疑能进一步降低光线在传输过程中的分散。
为了提高安装的稳定性，在一个可选的实施方案中，背光组件300和背光组件500之间可以设置有支撑框380，支撑框380为框架式结构，不会影响背光组件500及光学指纹传感器200的工作。具体的，支撑框380可以是金属框，例如铁框。
被反射的光线穿过透光盖板120和显示屏110之后，穿过透光区域310，为了尽可能多地使得光线投射到光学指纹传感器200上，通常透光区域310的面积较大。
本实施例中，背光组件500设置在背光组件300与光学指纹传感器200之间，背光组件500具有透光区域510，透光区域510在光学指纹传感器200的感光方向的投影位于透光区域310之内，经过透光区域310的光线能够经过透光区域510之后再投射到光学指纹传感器200上。背光组件500主要为透光区域310处进行补充背光，而且由于光线在靠近光学指纹传感器200的过程中逐渐汇集，因此透光区域510无需设置较大的面积，透光区域510的面积小于透光区域310的面积。
同样，透光区域510可以为贯穿背光组件500的透光孔511，透光孔511无疑能够更容易使得经过手指反射的光线进入到光学指纹传感器200中，透光孔511能够减少光线在传递过程中光强的损失。
通常情况下，背光组件500可以包括依次设置在背光组件300与光学指 纹传感器200之间的遮光圈520、第一增光膜530、第二增光膜540、扩散膜550、导光板560和反射膜570，扩散膜550与透光区域510相对的部位开设有第一避让孔551，进而能够防止扩散膜550对光线的扩散。反射膜570与透光区域510相对的部位开设有第二避让孔571，进而能够防止反射膜570对光线的反射。第一增光膜530、第二增光膜540和导光板560上透光区域510相对区域，朝向显示屏110的外侧表面均为平面。
如上文所述的第一增光膜330、第二增光膜340和导光板360的结构类似，第一增光膜530、第二增光膜540和导光板560的外侧表面通常为棱镜结构面，棱镜结构面会对光线产生分散作用，最终会导致光线较难汇聚到光学指纹传感器200中。基于此，在一个可选的实施方案中，第一增光膜530、第二增光膜540和导光板560上与透光区域510相对的区域，朝向显示屏110的外侧表面设计成平面，进而能避免该部分对光线的分散作用。
使得第一增光膜530、第二增光膜540和导光板560上局部外侧表面设计成平面的方式有多种，可以在制造的过程中直接将相对应的区域制造成平面。当然，还可以通过其他方式实现上述目的。请参考图4，考虑到加工难易，在一个可选的实施方案中，第一增光膜530和第二增光膜540均可以包括膜本体a和胶层b，膜本体a朝向显示屏110的表面可以为棱镜结构面，胶层b可以填充在棱镜结构面上、且使得局部外侧表面形成平面。当然，胶层b的折射率与膜本体a的折射率相等。当然，导光板560厚度较大，较容易通过加工的过程将其与透光区域510相对区域的外侧表面加工成平面。
本公开实施例公开的终端设备中，显示屏110可以是TFT显示屏，也可以是其他需要配置有背光组件的显示屏，本公开实施例不限制显示屏的具体种类。
本公开实施例公开的终端设备可以是智能手机、平板电脑、电子书阅读器、可穿戴设备(例如智能手表)、游戏机等设备，本公开实施例不限制终端设备的具体种类。
本公开上文实施例中重点描述的是各个实施例之间的不同，各个实施例之间不同的优化特征只要不矛盾，均可以组合形成更优的实施例，考虑到行文简洁，在此则不再赘述。
以上所述仅为本公开的实施例而已，并不用于限制本公开。对于本领域技术人员来说，本公开可以有各种更改和变化。凡在本公开的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本公开的权利要求范围之内。

Claims (10)

  1. 一种终端设备，包括显示模组、光学指纹传感器、至少两个背光组件和光发射器，所述显示模组包括显示屏和覆盖在所述显示屏上的透光盖板，所述光发射器和所述显示屏均固定在所述透光盖板的内侧表面，所述光学指纹传感器设置在所述显示屏背离所述透光盖板的一侧，所述至少两个背光组件依次设置在所述显示屏与所述光学指纹传感器之间，在所述显示屏到所述光学指纹传感器的方向上，所述至少两个背光组件的透光区域的面积依次减小，所述光发射器发射的光线经手指后，依次穿过所述显示模组和各所述透光区域且投射在所述光学指纹传感器上。
  2. 根据权利要求1所述的终端设备，其中，所述透光区域为在所述背光组件的厚度方向贯穿所述背光组件的透光孔。
  3. 根据权利要求1或2所述的终端设备，其中，所述背光组件包括朝着远离所述显示屏的方向依次分布的遮光圈、第一增光膜、第二增光膜、扩散膜、导光板和反射膜，所述反射膜与所述透光区域相对的部位开设有第一避让孔，所述反射膜与所述透光区域相对的部位开设有第二避让孔，所述第一增光膜、所述第二增光膜和所述导光板上与所述透光区域相对区域，朝向所述显示屏的外侧表面均为平面。
  4. 根据权利要求3所述的终端设备，其中，所述第一增光膜和所述第二增光膜均包括膜本体和胶层，所述膜本体朝向所述显示屏的表面为棱镜结构面，所述胶层填充在所述棱镜结构面，且形成所述外侧表面。
  5. 根据权利要求4所述的终端设备，其中，所述胶层的折射率与所述膜本体的折射率相等。
  6. 根据权利要求1至5中任一项所述的终端设备，其中，所述背光组件的数量为两个。
  7. 根据权利要求6所述的终端设备，其中，两个所述背光组件之间设置有支撑框。
  8. 根据权利要求1至7中任一项所述的终端设备，其中，所述光发射器和所述光学指纹传感器在垂直于所述显示屏方向的投影之间的距离为 5-15mm。
  9. 根据权利要求1至8中任一项所述的终端设备，其中，所述显示屏为TFT显示屏。
  10. 根据权利要求1至9中任一项所述的终端设备，其中，所述终端设备为手机、平板电脑、电子书阅读器、智能手表或游戏机。
PCT/CN2020/073194 2019-01-31 2020-01-20 终端设备 Ceased WO2020156320A1 (zh)

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