WO2021114531A1 - 一种显示装置 - Google Patents

一种显示装置 Download PDF

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Publication number
WO2021114531A1
WO2021114531A1 PCT/CN2020/084396 CN2020084396W WO2021114531A1 WO 2021114531 A1 WO2021114531 A1 WO 2021114531A1 CN 2020084396 W CN2020084396 W CN 2020084396W WO 2021114531 A1 WO2021114531 A1 WO 2021114531A1
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WO
WIPO (PCT)
Prior art keywords
display device
sensor
diffraction grating
display
backlight module
Prior art date
Application number
PCT/CN2020/084396
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English (en)
French (fr)
Inventor
查国伟
Original Assignee
武汉华星光电技术有限公司
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Filing date
Publication date
Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/966,202 priority Critical patent/US11714310B2/en
Publication of WO2021114531A1 publication Critical patent/WO2021114531A1/zh

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Classifications

    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
    • G02B5/1819—Plural gratings positioned on the same surface, e.g. array of gratings
    • 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
    • G02F1/1333—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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/145—Illumination specially adapted for pattern recognition, e.g. using gratings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses
    • 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
    • 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
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1866—Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
    • G02F2201/305—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating diffraction grating
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/40—Arrangements for improving the aperture ratio
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/58—Arrangements comprising a monitoring photodetector

Definitions

  • the present invention relates to the field of display technology, in particular to a display device.
  • the current mainstream display panels include liquid crystal display panels (LCD) and organic light-emitting diode displays (OLED), among which LCD is a passive light-emitting technology, which needs to be illuminated by a backlight module to make the liquid crystal cell realize light and dark control.
  • LCD liquid crystal display panels
  • OLED organic light-emitting diode displays
  • the collimated backlight is mainly used.
  • a part of the display light with certain collimation characteristics is reflected at the crest of the finger 20' and then enters the glass cover 100 to form reflected light. 101.
  • the reflected light 101 has the same angular distribution as the display light (that is, has a smaller angular distribution), and the fingerprint reflected light in a small angle area can be obtained during the fingerprint signal collection process, thereby having a better signal-to-noise ratio.
  • Another part of the light 102 is directly transmitted from the cover surface 100 into the air surface, where the light reflection is not completely diffuse, that is, the main direction of the reflected light has a certain similarity with the angular distribution of the incident light, but generally it will The incident light is scattered and appears as a noise signal during the fingerprint signal collection process. It can be seen that too high collimation will limit the viewing angle of the display itself, that is, the existing display device improves the signal-to-noise ratio while reducing the viewing angle. .
  • the object of the present invention is to provide a display device that can increase the viewing angle while improving the signal-to-noise ratio.
  • the present invention provides a display device, which includes:
  • a backlight module the top of the backlight module is provided with an inverse prism structure
  • the display module is arranged above the backlight module; the display module includes a display panel and a sensor assembly, the sensor assembly is embedded in the display panel; the sensor assembly includes a plurality of sensors, the sensor The surface is provided with a diffraction grating; the grating direction of the diffraction grating is perpendicular to the grating direction of the inverse prism structure, and the material of the diffraction grating is inorganic material; wherein the display panel includes a plurality of pixel units, the sensor and the The pixel unit corresponds.
  • the present invention also provides a display device, including:
  • a backlight module the top of the backlight module is provided with an inverse prism structure
  • the display module is arranged above the backlight module; the display module includes a display panel and a sensor assembly, the sensor assembly is embedded in the display panel; the sensor assembly includes a plurality of sensors, the sensor A diffraction grating is arranged on the surface; the grating direction of the diffraction grating is perpendicular to the grating direction of the inverse prism structure.
  • the display device of the present invention includes a backlight module, the top of the backlight module is provided with an inverse prism structure; the display module is provided above the backlight module; the display module includes a display panel and a sensor assembly, the sensor The component is embedded in the display panel; the sensor component includes a plurality of sensors, and the surface of the sensor is provided with a diffraction grating; the grating direction of the diffraction grating is perpendicular to the grating direction of the inverse prism structure; The signal-to-noise ratio avoids reducing the display viewing angle while improving the display effect and the accuracy of the signal.
  • Figure 1 is a schematic diagram of the light path of light propagation in the existing under-screen sensing scheme
  • FIG. 2 is a schematic diagram of the structure of the display device of the present invention.
  • Fig. 3 is a first top view of the display device of the present invention.
  • Figure 4 is a second top view of the display device of the present invention.
  • FIG. 5 is a schematic diagram of the optical path of light propagation of the display device of the present invention.
  • FIG. 2 is a schematic diagram of the structure of the display device of the present invention.
  • the display device of the present invention includes a backlight module 10 and a display module 200.
  • An inverse prism structure 14 is provided on the top of the backlight module 10, so that the angle of the emitted light whose prism angle is perpendicular to the direction of the inverse prism structure is compressed.
  • the backlight module 10 may include The reflective sheet 11, the light guide plate 12, the diffusion sheet 13 and the inverse prism structure 14. That is, the inverse prism structure 14 is located above the diffusion sheet 13.
  • the inverse prism structure 14 constitutes a one-dimensional collimated backlight structure.
  • the backlight module 10 may further include a light source 15 which is arranged on one side of the light guide plate 12.
  • the range of the half-intensity angle of the light emitted by the backlight module 10 is 10°-20°.
  • the range of the half-light intensity angle is 10°-15°.
  • the display module 200 is arranged above the backlight module 10; the display module 200 includes a display panel and a sensor assembly 40.
  • the cross-sectional structure of the display panel may include a lower polarizer 21, an array substrate 22, a liquid crystal layer 24, a color filter substrate 25, and an upper polarizer 26.
  • a cover plate can also be included.
  • the color filter substrate 25 is located above the array substrate 22; the color filter substrate 25 includes a plurality of color filter color resistors 251 and a black matrix 252.
  • the display panel includes a plurality of pixel units 30, and the pixel units include a plurality of sub-pixels 31-33, such as red sub-pixels, green sub-pixels, and blue sub-pixels.
  • the sensor assembly 40 is embedded in the display panel; in one embodiment, in order to further improve the signal-to-noise ratio, the sensor assembly 40 may be located on the array substrate 22 and the liquid crystal Between layers 24. In other embodiments, the sensor assembly 40 is located between the array substrate 22 and the lower polarizer 21. Of course, the sensor assembly 40 may also be located on the inner surface of the lower base substrate of the color filter substrate 25. Or the sensor assembly 40 is located between the color filter substrate 25 and the upper polarizer 26. It can be understood that the arrangement of the sensor assembly 40 is not limited to this.
  • the sensor assembly 40 includes a plurality of sensors 41, the surface of which is provided with a diffraction grating 411.
  • the diffraction grating 411 can be prepared in the direction of the reflected light from the sensor 41 facing the signal (such as a fingerprint) by means of nanoimprinting.
  • the grating direction of the diffraction grating 411 is perpendicular to the grating direction of the inverse prism structure 14.
  • the material of the diffraction grating 411 is an inorganic material.
  • the material of the diffraction grating 411 may include at least one of SiOx, SiNx, and TaOx.
  • the period range of the diffraction grating 411 may be 100 nm-1000 nm.
  • the duty ratio of the diffraction grating 411 may range from 0.3 to 0.8.
  • the senor 41 may correspond to the pixel unit 30. As shown in FIG. 3, the sensor 41 is parallel to the sub-pixels 31-33. As shown in FIG. 4, the sensor 41 is perpendicular to the sub-pixels 31-33.
  • the position of the sensor 41 corresponds to the position of the black matrix 252 in the first direction, wherein the first direction is parallel to the scan line. That is, the sensor 41 overlaps with the position of the black matrix in the scanning line direction, so as to avoid affecting the aperture ratio.
  • the senor 41 may include at least one of a facial recognition sensor, a distance sensor, a light sensor, and a three-dimensional sensor.
  • the inverse prism structure makes the reflected light of the fingerprint have the characteristics of near collimation in one direction, and at the same time avoids the overall compression of the display viewing angle, and has a protective effect in this direction Peeping effect; because the diffraction grating structure is arranged on the surface of the fingerprint sensor, and the grating direction of the diffraction grating is perpendicular to the grating direction of the inverse prism structure, the light reflected into the surface of the diffraction grating acts as an angular filter in the other direction Because the diffraction grating only has a patterned structure on the surface of the sensor, it will not affect the viewing angle of the display in this direction.
  • the above-mentioned structure makes the light reflected into the sensor constitute a "quasi-standard" in both dimensions.
  • the "straight" structure improves the signal-to-noise ratio of the fingerprint signal while avoiding reducing the display viewing angle, that is, achieving a better balance between the signal-to-noise ratio of the fingerprint signal and the display viewing angle, improving the display effect and the accuracy of the fingerprint signal.
  • the rest of the signals are similar.
  • the display device of the present invention includes a backlight module, the top of the backlight module is provided with an inverse prism structure; the display module is provided above the backlight module; the display module includes a display panel and a sensor assembly, the sensor The component is embedded in the display panel; the sensor component includes a plurality of sensors, and the surface of the sensor is provided with a diffraction grating; the grating direction of the diffraction grating is perpendicular to the grating direction of the inverse prism structure; The signal-to-noise ratio avoids reducing the display viewing angle while improving the display effect and the accuracy of the signal.

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  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
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  • General Health & Medical Sciences (AREA)
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Abstract

一种显示装置，显示装置包括：背光模块（10）的顶部设置有逆棱镜结构（14）；显示模组（200），设于所述背光模块（10）的上方；显示模组（200）包括显示面板和传感器组件（40），传感器组件（40）嵌于显示面板内；传感器组件（40）包括多个传感器（41），传感器（41）的表面设置有衍射光栅（411）；衍射光栅（411）的光栅方向与逆棱镜结构（14）的光栅方向垂直。

Description

一种显示装置 技术领域
本发明涉及显示技术领域，特别是涉及一种显示装置。
 背景技术
目前主流的显示面板包括液晶显示面板（LCD）和有机发光二极管显示器（OLED），其中LCD为被动发光技术，需要在背光模块的照射下使得液晶盒实现光线的亮暗控制。
如图1所示，在LCD屏内传感方案中，主要采用准直背光，具有一定准直特性的显示光线一部分在手指20’的波峰处发生反射再进入玻璃盖板100内，形成反射光线101，反射光线101具有与显示光线相同的角度分布（即具有较小的角度分布），在指纹信号采集过程中可以获取到小角度区域的指纹反射光，从而具有较好的信噪比。
 技术问题
另外一部分光线102直接从盖板表面100透射进入空气表面，该处的光线反射为非完全漫散射，也即反射光的主方向与入射光线的角度分布具有一定的相似性，但总体上会将入射光打散，在指纹信号采集过程中呈现为噪声信号，可见过高的准直性会使得显示器本身的视角受限，也即现有的显示装置在提高信噪比的同时减小了视角。
因此，有必要提供一种显示装置，以解决现有技术所存在的问题。
 技术解决方案
本发明的目的在于提供一种显示装置，能够在提高信噪比的同时增大视角。
为解决上述技术问题，本发明提供一种显示装置，其包括：
背光模块，所述背光模块的顶部设置有逆棱镜结构；
显示模组，设于所述背光模块的上方；所述显示模组包括显示面板和传感器组件，所述传感器组件嵌于所述显示面板内；所述传感器组件包括多个传感器，所述传感器的表面设置有衍射光栅；所述衍射光栅的光栅方向与所述逆棱镜结构的光栅方向垂直，所述衍射光栅的材料为无机材料；其中所述显示面板包括多个像素单元，所述传感器与所述像素单元对应。
本发明还提供一种显示装置，包括：
背光模块，所述背光模块的顶部设置有逆棱镜结构；
显示模组，设于所述背光模块的上方；所述显示模组包括显示面板和传感器组件，所述传感器组件嵌于所述显示面板内；所述传感器组件包括多个传感器，所述传感器的表面设置有衍射光栅；所述衍射光栅的光栅方向与所述逆棱镜结构的光栅方向垂直。
 有益效果
本发明的显示装置，包括背光模块，所述背光模块的顶部设置有逆棱镜结构；显示模组，设于所述背光模块的上方；所述显示模组包括显示面板和传感器组件，所述传感器组件嵌于所述显示面板内；所述传感器组件包括多个传感器，所述传感器的表面设置有衍射光栅；所述衍射光栅的光栅方向与所述逆棱镜结构的光栅方向垂直；因此在提高信号信噪比的同时避免降低显示视角，提高了显示效果和信号的准确性。
 附图说明
图1为现有屏下传感方案的光线传播的光路示意图；
图2为本发明显示装置的结构示意图；
图3为本发明显示装置的第一种俯视图；
图4为本发明显示装置的第二种俯视图；
图5为本发明显示装置的光线传播的光路示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是以相同标号表示。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。
请参照图2至图5，图2为本发明显示装置的结构示意图。
如图2所示，本发明的显示装置包括背光模块10和显示模组200。
所述背光模块10的顶部设置有逆棱镜结构14，从而使得棱镜角垂直于所述逆棱镜结构方向的出射光角度得到压缩，在一实施方式中，所述背光模块10由下至上依次可包括反射片11、导光板12、扩散片13以及逆棱镜结构14。也即所述逆棱镜结构14位于所述扩散片13的上方。其中逆棱镜结构14构成一维准直背光结构。
此外所述背光模块10还可包括光源15，所述光源15设于导光板12的一侧。在一实施方式中，为了进一步使得出射光的角度得到压缩，所述背光模块10发出的光线的半光强角度的范围为10°-20°。优选地半光强角度的范围为10°-15°。
显示模组200设于所述背光模块10的上方；所述显示模组200包括显示面板和传感器组件40。
其中显示面板的截面结构可包括下偏光片21、阵列基板22、液晶层24、彩膜基板25以及上偏光片26。当然还可包括盖板。所述彩膜基板25位于所述阵列基板22的上方；彩膜基板25包括多个彩膜色阻251及黑色矩阵252。结合图3和图4，所述显示面板包括多个像素单元30，所述像素单元包括多个子像素31-33，比如包括红色子像素、绿色子像素以及蓝色子像素。
结合图3或图4，所述传感器组件40嵌于所述显示面板内；在一实施方式中，为了进一步提高信号信噪比，所述传感器组件40可位于所述阵列基板22和所述液晶层24之间。在其他实施方式中，所述传感器组件40位于所述阵列基板22和下偏光片21之间，当然所述传感器组件40也可位于所述彩膜基板25的下衬底基板的内表面。或者所述传感器组件40位于所述彩膜基板25和上偏光片26之间。可以理解的，传感器组件40的设置方式不限于此。
结合图3或图4，所述传感器组件40包括多个传感器41，所述传感器41的表面设置有衍射光栅411。其中可通过纳米压印的方式在所述传感器41面向信号（比如指纹）反射光的方向上制备所述衍射光栅411。其中，所述衍射光栅411的光栅方向与所述逆棱镜结构14的光栅方向垂直。
在一实施方式中，为了进一步增大显示视角，所述衍射光栅411的材料为无机材料。其中所述衍射光栅411的材料可包括SiOx、SiNx以及TaOx中的至少一种。在一实施方式中，所述衍射光栅411的周期范围可为100nm-1000nm。在一实施方式中，所述衍射光栅411的占空比范围可为0.3-0.8。
在一实施方式中，所述传感器41可与所述像素单元30对应。如图3所示，所述传感器41与所述子像素31-33平行。如图4所示，所述传感器41与所述子像素31-33垂直。
优选地，所述传感器41的位置与位于第一方向上的黑色矩阵252的位置对应，其中所述第一方向与扫描线平行。也即所述传感器41与扫描线方向的黑色矩阵的位置重叠，从而避免影响开口率。
在一实施方式中，所述传感器41可包括面部识别传感器、距离传感器、光线传感器以及三维传感器中的至少一种。
如图5所示，具有一定角度分布的入射光a经过衍射光栅411时，经过衍射光栅411的衍射作用使得特定衍射级别的光线压缩为小角度光线b，其他角度光线均被反射，从而具有类准直效果。
以传感器为指纹传感器为例，由于背光模块采用逆棱镜结构，逆棱镜结构使得指纹反射光线在一个方向上具有接近准直的特征，同时避免了显示视角的全面压缩，并且在该方向上具有防窥效果；由于在指纹传感器的表面设置衍射光栅结构，且所述衍射光栅的光栅方向与所述逆棱镜结构的光栅方向垂直，使得反射进入衍射光栅表面的光线在另一个方向上起到角度过滤的作用，由于衍射光栅仅在传感器表面具有图案化结构，因而不会对该方向的显示视角产生影响，也即上通过上述结构使得反射进入传感器的光线在两个维度上均构成了“类准直”结构，在提高指纹信号信噪比的同时避免降低显示视角，也即在指纹信号信噪比和显示视角之间取得了较好的平衡，提高了显示效果和指纹信号的准确性。其余信号与此类似。
本发明的显示装置，包括背光模块，所述背光模块的顶部设置有逆棱镜结构；显示模组，设于所述背光模块的上方；所述显示模组包括显示面板和传感器组件，所述传感器组件嵌于所述显示面板内；所述传感器组件包括多个传感器，所述传感器的表面设置有衍射光栅；所述衍射光栅的光栅方向与所述逆棱镜结构的光栅方向垂直；从而在提高信号信噪比的同时避免降低显示视角，提高了显示效果和信号的准确性。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种显示装置，其包括：
    背光模块，所述背光模块的顶部设置有逆棱镜结构；
    显示模组，设于所述背光模块的上方；所述显示模组包括显示面板和传感器组件，所述传感器组件嵌于所述显示面板内；所述传感器组件包括多个传感器，所述传感器的表面设置有衍射光栅；所述衍射光栅的光栅方向与所述逆棱镜结构的光栅方向垂直，所述衍射光栅的材料为无机材料；其中所述显示面板包括多个像素单元，所述传感器与所述像素单元对应。
  2. 根据权利要求1所述的显示装置，其中
    所述衍射光栅的材料包括SiOx、SiNx以及TaOx中的至少一种。
  3. 根据权利要求1所述的显示装置，其中
    所述衍射光栅的周期范围为100nm-1000nm。
  4. 根据权利要求1所述的显示装置，其中
    所述衍射光栅的占空比范围为0.3-0.8。
  5. 根据权利要求1所述的显示装置，其中
    所述背光模块发出的光线的半光强角度的范围为10°-20°。
  6. 根据权利要求1所述的显示装置，其中
    所述显示面板还包括黑色矩阵，所述传感器的位置与位于第一方向上的黑色矩阵的位置对应，所述第一方向与扫描线平行。
  7. 根据权利要求6所述的显示装置，其中
    所述像素单元包括多个子像素，所述传感器与所述子像素平行或者垂直。
  8. 根据权利要求1所述的显示装置，其中
    所述背光模块由下至上依次包括反射片、导光板以及扩散片，所述逆棱镜结构位于所述扩散片的上方。
  9. 一种显示装置，其包括：
    背光模块，所述背光模块的顶部设置有逆棱镜结构；
    显示模组，设于所述背光模块的上方；所述显示模组包括显示面板和传感器组件，所述传感器组件嵌于所述显示面板内；所述传感器组件包括多个传感器，所述传感器的表面设置有衍射光栅；所述衍射光栅的光栅方向与所述逆棱镜结构的光栅方向垂直。
  10. 根据权利要求9所述的显示装置，其中
    所述衍射光栅的材料为无机材料。
  11. 根据权利要求10所述的显示装置，其中
    所述衍射光栅的材料包括SiOx、SiNx以及TaOx中的至少一种。
  12. 根据权利要求9所述的显示装置，其中
    所述衍射光栅的周期范围为100nm-1000nm。
  13. 根据权利要求9所述的显示装置，其中
    所述衍射光栅的占空比范围为0.3-0.8。
  14. 根据权利要求9所述的显示装置，其中
    所述背光模块发出的光线的半光强角度的范围为10°-20°。
  15. 根据权利要求9所述的显示装置，其中
    所述显示面板包括多个像素单元，所述传感器组件包括多个传感器，所述传感器与所述像素单元对应。
  16. 根据权利要求15所述的显示装置，其中
    所述显示面板还包括黑色矩阵，所述传感器的位置与位于第一方向上的黑色矩阵的位置对应，所述第一方向与扫描线平行。
  17. 根据权利要求15所述的显示装置，其中
    所述像素单元包括多个子像素，所述传感器与所述子像素平行或者垂直。
  18. 根据权利要求9所述的显示装置，其中
    所述背光模块由下至上依次包括反射片、导光板以及扩散片，所述逆棱镜结构位于所述扩散片的上方。
  19. 根据权利要求9所述的显示装置，其中所述传感器包括面部识别传感器、距离传感器、光线传感器以及三维传感器中的至少一种。
  20. 根据权利要求9所述的显示装置，其中所述显示面板包括阵列基板、液晶层、彩膜基板、下偏光片以及上偏光片；所述彩膜基板位于所述阵列基板的上方；
    所述传感器组件位于所述阵列基板和所述液晶层之间。
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