WO2022000689A1 - 视角扩散膜片及显示面板 - Google Patents

视角扩散膜片及显示面板 Download PDF

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Publication number
WO2022000689A1
WO2022000689A1 PCT/CN2020/106543 CN2020106543W WO2022000689A1 WO 2022000689 A1 WO2022000689 A1 WO 2022000689A1 CN 2020106543 W CN2020106543 W CN 2020106543W WO 2022000689 A1 WO2022000689 A1 WO 2022000689A1
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WO
WIPO (PCT)
Prior art keywords
viewing angle
protrusion
display panel
refractive
refraction
Prior art date
Application number
PCT/CN2020/106543
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English (en)
French (fr)
Inventor
窦虎
吴梓平
俞刚
Original Assignee
Tcl华星光电技术有限公司
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Filing date
Publication date
Application filed by Tcl华星光电技术有限公司 filed Critical Tcl华星光电技术有限公司
Priority to US17/040,995 priority Critical patent/US11886068B2/en
Publication of WO2022000689A1 publication Critical patent/WO2022000689A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0215—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0263—Diffusing elements; Afocal elements characterised by the diffusing properties with positional variation of the diffusing properties, e.g. gradient or patterned diffuser
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • 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
    • G02F1/133528—Polarisers
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G02F1/133507—Films for enhancing the luminance
    • 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
    • G02F2201/50—Protective arrangements

Definitions

  • the present application relates to the field of display technology, and in particular, to a viewing angle diffusion film and a display panel.
  • a viewing angle diffusion film is usually added to the display panel in the industry, and the viewing angle diffusion film is used to modulate the light from the front viewing angle of the display panel to a large viewing angle, thereby increasing the display brightness of the large viewing angle.
  • the existing viewing angle diffusing film generally has only one modulation angle for a beam of incident light, resulting in its limited ability to modulate the incident light wave.
  • the diffusion effect is poor and affects the customer experience.
  • the existing viewing angle diffusion film has poor viewing angle diffusion effect when dealing with a display panel with a relatively concentrated light shape emitted by a light source, which affects customer experience.
  • an embodiment of the present application provides a viewing angle diffusing film, the viewing angle diffusing film includes a base and a refracting protrusion disposed on a surface of the base;
  • the refraction protrusion includes a first side surface away from the center of the base, and the first side surface includes a first curved surface.
  • the first curved surface extends from the top surface of the refractive protrusion to the bottom surface of the refractive protrusion.
  • the first curved surface extends downward in a direction away from the center of the refractive protrusion.
  • the top surface of the refractive protrusion includes a second curved surface.
  • the viewing angle diffusion film further includes a protective layer covering the refractive protrusions, and the refractive index of the protective layer is greater than that of the refractive protrusions.
  • the top surface of the refractive protrusion includes an outer convex surface.
  • the viewing angle diffusion film further includes a polarizing film layer, and the polarizing film layer is disposed on a side of the substrate away from the refractive protrusion.
  • a plurality of the refraction protrusions are arranged at intervals.
  • the refractive protrusions are integrally formed with the base.
  • the present application further provides a display panel, the display panel includes a display screen body and a viewing angle diffusing film, the viewing angle diffusing film is arranged on the light emitting side of the display screen body; the viewing angle diffusing film comprising a base and a refraction protrusion disposed on the surface of the base;
  • the refraction protrusion includes a first side surface away from the center of the base, and the first side surface includes a first curved surface.
  • the first curved surface extends from the top surface of the refractive protrusion to the bottom surface of the refractive protrusion.
  • the first curved surface extends downward in a direction away from the center of the refractive protrusion.
  • the top surface of the refractive protrusion includes a second curved surface.
  • the viewing angle diffusion film further includes a protective layer covering the refractive protrusions, and the refractive index of the protective layer is greater than that of the refractive protrusions.
  • the top surface of the refractive protrusion includes an outer convex surface.
  • the viewing angle diffusion film further includes a polarizing film layer, and the polarizing film layer is disposed on a side of the substrate away from the refractive protrusion.
  • a plurality of the refraction protrusions are arranged at intervals.
  • the refractive protrusions are integrally formed with the base.
  • the width of the top surface of the refractive protrusion is 3-10 microns.
  • the width of the bottom surface of the refractive protrusion is 12-20 microns.
  • the propagation directions of the outgoing light after the parallel light rays are refracted by different parts on the curved surface are different, so that the viewing angle diffusion film has multiple modulations for a beam of incident light.
  • the light shape of the outgoing light modulated by the viewing angle diffusion film is more dispersed, thereby improving the image quality effect of the large viewing angle display screen .
  • 1 is a schematic diagram of the first structure of the viewing angle diffusion film in the application
  • FIG. 2 is a schematic diagram of the second structure of the viewing angle diffusion film in the application.
  • 3 is the normalized brightness of the display panel in the prior art and the present application at different viewing angles
  • FIG. 4 is a schematic structural diagram of a display panel according to an embodiment of the present application.
  • the present application addresses the technical problem that the existing viewing angle diffusing film has poor viewing angle diffusing effect when dealing with a display panel with a relatively concentrated light shape emitted by a light source, which affects customer experience.
  • the viewing angle diffusing film 10 includes a base 11 and a refraction protrusion 12 disposed on the surface of the base 11; the refraction protrusion 12 is used to change the incident viewing angle
  • the propagation direction of the light of the diffusing film 10 is used to shift part of the light away from the center of the viewing angle diffusing film 10 by the refraction of the light, thereby enhancing the brightness of the large viewing angle.
  • the base 11 and the refracting protrusions 12 are both made of transparent materials, which can greatly improve the light utilization rate.
  • the refracting protrusions 12 can be integrally formed with the base 11 to reduce production processes and costs.
  • the width of the top surface 123 of the refractive protrusion 12 may be 3-10 microns
  • the width of the bottom surface of the refractive protrusion 12 may be 12-20 microns
  • the height of the refractive protrusion 12 may be 15-10 microns. 25 microns.
  • the width of the top surface 123 of the refractive protrusion 12 may be 6 microns, the width of the bottom surface of the refractive protrusion 12 may be 18 microns, and the height of the refractive protrusion 12 may be 21 microns. .
  • the refraction protrusion 12 includes a first side surface 121 away from the center of the base 11 , and the first side surface 121 includes a first curved surface.
  • the viewing angle diffusion film 10 is suitable for a
  • the incident light has multiple modulation angles, which enhances the modulation capability of the viewing angle diffusing film 10.
  • the light shape of the outgoing light modulated by the viewing angle diffusing film 10 is more dispersed. Improve the image quality of the large viewing angle display.
  • the curvature radius of each part of the first curved surface is greater than or equal to 5 mm, and the absolute value of the difference between the curved surface radii of each part of the first curved surface is less than or equal to 0.5.
  • the curvature radius of each part of the first curved surface is made more uniform, and each part of the first curved surface changes at a small angle, and the transmittance difference is relatively high. Small, there is no black line produced by mutation, which can avoid the generation of moire.
  • the first curved surface extends from the top surface 123 of the refractive protrusion 12 to the bottom surface of the refractive protrusion 12 .
  • the first curved surface is connected with the top surface 123 of the refraction protrusion 12 and the surface of the base 11 , so that more parts of the first side surface 121 of the refraction protrusion 12 are formed by curved surfaces, so that the The viewing angle diffusion film 10 has more modulation angles for light beams with concentrated light shapes.
  • the first curved surface extends downward in a direction away from the center of the refraction protrusion 12 .
  • the viewing angle diffusing film 10 when the viewing angle diffusing film 10 is attached to the display screen body 20 , for the light incident on the viewing angle diffusing film 10 along the direction perpendicular to the surface of the substrate 11 , the setting of the first curved surface , so that the light entering the first curved surface in the direction perpendicular to the surface of the substrate 11 is refracted by the first curved surface and then shifted in the direction away from the refracting protrusion 12 to increase the brightness of the large viewing angle.
  • FIG. 1 only illustrates the case where the first curved surface is an inner concave surface.
  • the first curved surface may also be an outer convex surface, and the first curved surface may also be composed of an outer convex surface and an inner concave surface that are connected to each other.
  • FIG. 1 only illustrates the case where the first curved surface includes one curved surface.
  • the first curved surface may also include a plurality of interconnected curved surfaces, and the first curved surface may also include a plurality of interconnected curved surfaces and bevel.
  • the overall shape of the vertical section of the first side surface 121 may be a curve shape, a wavy line shape, a zigzag shape, an S shape, or the like.
  • the refraction protrusion 12 further includes a second side surface 122 disposed away from the first side surface 121 and a third side surface disposed adjacent to the refraction protrusion 12.
  • the shape of the second side surface 122 and the shape of the third side surface may be the same as or different from the shape of the first side surface 121 .
  • the overall shape of the vertical section of the refraction protrusion 12 may be a convex lens shape, a Euclidean lens shape, an hourglass shape, a water drop shape, or the like.
  • a plurality of the refracting protrusions 12 are provided, and the plurality of the refracting protrusions 12 may be uniformly distributed on the surface of the base 11 , and the plurality of the refracting protrusions 12 may also be scattered on the base 11 .
  • the shapes of all the refractive protrusions 12 may be the same or different.
  • a plurality of the refraction protrusions 12 are arranged at intervals to ensure the display brightness of the display panel when viewed from the front.
  • the distance between two adjacent refracting protrusions 12 can be 2-25 microns, and the spacing between two adjacent refracting protrusions 12 can be selected according to the actual situation. The denser the light sources are distributed, the smaller the distance between the two refraction protrusions 12 is.
  • the distance between two adjacent refractive protrusions 12 may be 7 micrometers.
  • the top surface 123 of the refraction protrusion 12 may be a plane, so that the light entering the refraction protrusion 12 along the direction perpendicular to the surface of the substrate 11 exits from the top surface 123 of the refraction protrusion 12 The propagation direction of the display panel remains unchanged, so as to ensure the display brightness of the display panel when viewed from the front.
  • the top surface 123 of the refracting protrusion 12 may further include a second curved surface, so that the light entering the refracting protrusion 12 in the direction perpendicular to the surface of the substrate 11 is refracted from the When the top surface 123 of the protrusion 12 is emitted, the propagation direction of the light is changed, which can disperse the more concentrated light to more areas, so as to improve the uniformity of the display brightness of the display panel.
  • the curvature radius of each part of the second curved surface is greater than or equal to 5 mm, and the absolute value of the difference between the curved surface radii of each part of the second curved surface is less than or equal to 0.5.
  • the top surface 123 of the refraction protrusion 12 is a curved surface; when the light sources of the display panel are scattered, the top surface 123 of the refraction protrusion 12 is a curved surface.
  • the face 123 is flat.
  • the viewing angle diffusion film 10 further includes a protective layer 13 covering the refractive protrusions 12 , and the protective layer 13 is made of a transparent material for protecting the refractive protrusions 12 .
  • the refractive index of the protective layer 13 is greater than the refractive index of the refractive protrusion 12 , so that when the light enters the protective layer 13 from the first side 121 of the refractive protrusion 12 , the light is directed away from the refractive protrusion 12 . Deflection, which can improve the brightness of a wider viewing angle.
  • the top surface 123 of the refracting protrusion 12 includes an outer convex surface, so that when the light enters the protective layer 13 from the top surface 123 of the refracting protrusion 12, the light is deflected in the direction away from the refracting protrusion 12, thereby Can improve the brightness of large viewing angle.
  • the viewing angle diffusion film 10 further includes a polarizing film layer 14 , and the polarizing film layer 14 is disposed on the side of the substrate 11 away from the refraction protrusions 12 .
  • the refraction protrusions 12 are combined with the polarizing film layer 14, so that the viewing angle diffusing film 10 can serve as a large viewing angle polarizer, so that the viewing angle diffusing film 10 can replace the polarizer on the existing display panel.
  • FIG. 3 shows the normalized brightness of the display panel in the prior art and the present application at different viewing angles.
  • the ordinate corresponds to the normalized brightness, that is, the display brightness of the display panel under different viewing angles
  • the abscissa corresponds to the viewing angle
  • the thick solid line corresponds to the display panel using the viewing angle diffusion film 10 in the present application.
  • the dotted line corresponds to the normalized brightness of the display panel using the viewing angle diffusing film 10 in the prior art at different viewing angles
  • the thin solid line corresponds to the display panel that does not use the viewing angle diffusing film 10 at different viewing angles. Normalized brightness. It can be seen from FIG. 3 that, under the same light source, the display panel using the viewing angle diffusion film 10 in the present application has better brightness at a large viewing angle.
  • the present application further provides a display panel, as shown in FIG.
  • the viewing angle diffusion film 10 is disposed on the light-emitting side of the display screen body 20 .
  • the display panel further includes a backlight module 30 disposed on a side of the display screen body 20 away from the viewing angle diffusion film 10 .
  • the viewing angle diffusing film 10 when the viewing angle diffusing film 10 is attached to the display screen body 20 , the viewing angle diffusing film 10 has a light scattering effect, and at this time, it is unnecessary to add a diffusing film in the backlight module 30 to reduce the production cost.
  • the beneficial effects of the present invention are as follows: when the light beam emitted by the light source of the display panel enters the refracting protrusion 12 , the propagation directions of the emergent light after the parallel light rays are refracted by different parts on the curved surface are different, so that the viewing angle diffusion film 10 has different propagation directions. There are multiple modulation angles for a beam of incident light, which enhances the modulation capability of the viewing angle diffusing film 10. When dealing with a display panel where the light shape emitted by the light source is relatively concentrated, the light shape of the outgoing light modulated by the viewing angle diffusing film 10 is more dispersed. , so as to improve the image quality effect of the large viewing angle display screen.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

一种视角扩散膜片（10）及显示面板，视角扩散膜片（10）包括基底（11）以及设置于基底（11）的表面的折射凸起（12）；折射凸起（12）包括远离基底（11）的中心的第一侧面（121），第一侧面（121）包括第一曲面。

Description

视角扩散膜片及显示面板 技术领域
本申请涉及显示技术领域，尤其涉及一种视角扩散膜片及显示面板。
 背景技术
随着显示面板的分辨率的提升,显示面板的大视角亮度表现的越来越差。为了解决这一问题，行业内通常会在显示面板上增加一层视角扩散膜片，利用视角扩散膜片将显示面板的正视角的光调制到大视角，从而增加大视角的显示亮度。
然而，现有的视角扩散膜片对于一束入射光一般只存在一个调制角度，导致其对入射光波调制能力有限，在应对光源发出的光形较为集中的显示面板时，视角扩散膜片的视角扩散效果较差，影响客户体验。
 技术问题
现有的视角扩散膜片在应对光源发出的光形较为集中的显示面板时视角扩散效果较差，影响客户体验。
 技术解决方案
第一方面，本申请实施例提供一种视角扩散膜片，所述视角扩散膜片包括基底以及设置于所述基底的表面的折射凸起；
其中，所述折射凸起包括远离所述基底的中心的第一侧面，所述第一侧面包括第一曲面。
在一些实施例中，所述第一曲面由所述折射凸起的顶面向所述折射凸起的底面延伸。
在一些实施例中，所述第一曲面沿远离所述折射凸起的中心的方向向下延伸。
在一些实施例中，所述折射凸起的顶面包括第二曲面。
在一些实施例中，所述视角扩散膜片还包括覆盖所述折射凸起的保护层，所述保护层的折射率大于所述折射凸起的折射率。
在一些实施例中，所述折射凸起的顶面包括一外凸面。
在一些实施例中，所述视角扩散膜片还包括偏振膜层，所述偏振膜层设置于所述基底远离所述折射凸起的一侧。
在一些实施例中，多个所述折射凸起相间隔设置。
在一些实施例中，所述折射凸起与所述基底一体成型。
第二方面，本申请还提供一种显示面板，所述显示面板包括显示屏体以及视角扩散膜片，所述视角扩散膜片设置于所述显示屏体的出光侧；所述视角扩散膜片包括基底以及设置于所述基底的表面的折射凸起；
其中，所述折射凸起包括远离所述基底的中心的第一侧面，所述第一侧面包括第一曲面。
在一些实施例中，所述第一曲面由所述折射凸起的顶面向所述折射凸起的底面延伸。
在一些实施例中，所述第一曲面沿远离所述折射凸起的中心的方向向下延伸。
在一些实施例中，所述折射凸起的顶面包括第二曲面。
在一些实施例中，所述视角扩散膜片还包括覆盖所述折射凸起的保护层，所述保护层的折射率大于所述折射凸起的折射率。
在一些实施例中，所述折射凸起的顶面包括一外凸面。
在一些实施例中，所述视角扩散膜片还包括偏振膜层，所述偏振膜层设置于所述基底远离所述折射凸起的一侧。
在一些实施例中，多个所述折射凸起相间隔设置。
在一些实施例中，所述折射凸起与所述基底一体成型。
在一些实施例中，所述折射凸起的顶面的宽度为3～10微米。
在一些实施例中，所述折射凸起的底面的宽度为12～20微米。
 有益效果
显示面板的光源发出的光束射入折射凸起中时，平行的光线经过曲面上的不同部位折射后的出射光的传播方向不相同，从而使得视角扩散膜片对于一束入射光存在多个调制角度，增强视角扩散膜片的调制能力，在应对光源发出的光形较为集中的显示面板时，视角扩散膜片调制后的出射光的光形更加分散，从而提高大视角显示画面的画质效果。
 附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1为本申请中视角扩散膜片的第一种结构示意图；
图2为本申请中视角扩散膜片的第二种结构示意图；
图3为现有技术和本申请中显示面板在不同视角时的归一化亮度；
图4为本申请一实施方式中显示面板的结构示意图。
附图标记：
10、视角扩散膜片；11、基底；12、折射凸起；121、第一侧面；122、第二侧面；123、顶面；13、保护层；14、偏振膜层；20、显示屏体；30、背光模块。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，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，结构相似的单元是用以相同标号表示。
本申请针对现有的视角扩散膜片在应对光源发出的光形较为集中的显示面板时视角扩散效果较差，影响客户体验的技术问题。
一种视角扩散膜片，如图1所示，所述视角扩散膜片10包括基底11以及设置于所述基底11的表面的折射凸起12；所述折射凸起12用于改变射入视角扩散膜片10的光线的传播方向，并利用光的折射将部分光线向远离视角扩散膜片10的中心的方向偏移，从而增强大视角亮度。
其中，所述基底11以及所述折射凸起12均由透明材料制成，可较大出程度提升光利用率。所述折射凸起12可以与所述基底11一体成型，以减少生产工序，降低成本。
其中，所述折射凸起12的顶面123的宽度可以为3～10微米，所述折射凸起12的底面的宽度可以为12～20微米，所述折射凸起12的高度可以为15～25微米。
在一实施方式中，所述折射凸起12的顶面123的宽度可以为6微米，所述折射凸起12的底面的宽度可以为18微米，所述折射凸起12的高度可以为21微米。
具体的，所述折射凸起12包括远离所述基底11的中心的第一侧面121，所述第一侧面121包括第一曲面。
需要说明的是，显示面板的光源发出的光束射入折射凸起12中时，平行的光线经过曲面上的不同部位折射后的出射光的传播方向不相同，从而使得视角扩散膜片10对于一束入射光存在多个调制角度，增强视角扩散膜片10的调制能力，在应对光源发出的光形较为集中的显示面板时，视角扩散膜片10调制后的出射光的光形更加分散，从而提高大视角显示画面的画质效果。
其中，所述第一曲面的各部分的曲率半径均大于或等于5毫米，所述第一曲面的各部分的曲面半径之差的绝对值小于或等于0.5。
需要说明的是，通过对第一曲面的各部分的曲率半径进行设计，使得第一曲面的面形过渡更均匀，第一曲面的各部分之间以小角度进行变化，透过率差异性较小，不存在突变产生的黑线，可以避免莫尔纹的产生。
具体的，所述第一曲面由所述折射凸起12的顶面123向所述折射凸起12的底面延伸。
进一步的，所述第一曲面与所述折射凸起12的顶面123以及所述基底11的表面连接，以使得折射凸起12的第一侧面121的更多部分均由曲面形成，从而使得视角扩散膜片10对于光形集中的光束具有更多的调制角度。
具体的，所述第一曲面沿远离所述折射凸起12的中心的方向向下延伸。
需要说明的是，将视角扩散膜片10贴附于显示屏体20上时，对于沿垂直基底11的表面的方向入射至视角扩散膜片10中的光线而言，通过对第一曲面的设置，从而使得沿垂直基底11的表面的方向射入到第一曲面的光线经第一曲面折射后沿远离折射凸起12的方向偏移，以增大大视角亮度。
需要说明的是，图1中仅示意了第一曲面为内凹面的情况，实际实施中，第一曲面也可以为外凸面，第一曲面还可以由相互连接的外凸面和内凹面组成。
需要说明的是，图1中仅示意了第一曲面包括一个曲面的情况，实际实施中，第一曲面也可以包括多个相互连接的曲面，第一曲面还可以包括多个相互连接的曲面和斜面。
具体的，所述第一侧面121的竖向截面的整体形状可以为曲线状、波浪线状、锯齿状或S形等。
具体的，所述折射凸起12还包括与所述第一侧面121背向设置的第二侧面122以及与所述折射凸起12相邻设置的第三侧面，所述第二侧面122的形状和第三侧面的形状可以与所述第一侧面121的形状相同或不同。
具体的，所述折射凸起12的竖向截面的整体形状可以呈凸透镜状、欧透镜状、沙漏状或水滴状等。
具体的，所述折射凸起12设置有多个，多个所述折射凸起12可以均匀分布于所述基底11的表面，多个所述折射凸起12还可以零散分布于所述基底11的表面，所有折射凸起12的的形状可以相同或不同。
在一实施方式中，多个所述折射凸起12相间隔设置，以保证显示面板正视时的显示亮度。
需要说明的是，相邻两个折射凸起12之间的间距可以为2～25微米，相邻两个折射凸起12之间的间距可以通过实际情况进行选择，一般而言，显示面板的光源分布的越密集，两个折射凸起12之间的间距越小。
在一实施方式中，相邻两个折射凸起12之间的间距可以为7微米。
在一实施方式中，所述折射凸起12的顶面123可以为平面，从而使得沿垂直基底11的表面的方向射入折射凸起12的光线从折射凸起12的顶面123射出时光线的传播方向不变，以保证显示面板正视时的显示亮度。
如图2所示，在另一实施方式中，所述折射凸起12的顶面123还可以包括第二曲面，从而使得沿垂直基底11的表面的方向射入折射凸起12的光线从折射凸起12的顶面123射出时光线的传播方向被改变，可以将较为集中的光线分散到更多区域，以提升显示面板的显示亮度的均匀性。
其中，所述第二曲面的各部分的曲率半径均大于或等于5毫米，所述第二曲面的各部分的曲面半径之差的绝对值小于或等于0.5。
需要说明的是，通过对第二曲面的各部分的曲率半径进行设计，使得第二曲面的面形过渡更均匀，第二曲面的各部分之间以小角度进行变化，透过率差异性较小，不存在突变产生的黑线，可以避免莫尔纹的产生。
需要说明的是，一般而言，显示面板的光源排布较为密集时，所述折射凸起12的顶面123为曲面；显示面板的光源排布较为疏散时，所述折射凸起12的顶面123为平面。
在一实施方式中，所述视角扩散膜片10还包括覆盖所述折射凸起12的保护层13，所述保护层13由透明材料制成，以用于保护所述折射凸起12。
其中，所述保护层13的折射率大于所述折射凸起12的折射率，从而使得光线从折射凸起12的第一侧面121射入到保护层13时光线向远离折射凸起12的方向偏折，从而可以提升更大视角的亮度。
进一步的，所述折射凸起12的顶面123包括一外凸面，从而使得光线从折射凸起12的顶面123射入到保护层13时光线向远离折射凸起12的方向偏折，从而可以提升大视角的亮度。
在一实施方式中，所述视角扩散膜片10还包括偏振膜层14，所述偏振膜层14设置于所述基底11远离所述折射凸起12的一侧。
需要说明的是，将折射凸起12与偏振膜层14结合，使得视角扩散膜片10可以充当大视角偏光片，从而使得视角扩散膜片10可以取代现有显示面板上的偏光片。
参见图3，图3为现有技术和本申请中显示面板在不同视角时的归一化亮度。
其中，纵坐标对应归一化亮度，即显示面板在不同视角下的显示亮度，横坐标对应视角，粗实线对应采用本申请中的视角扩散膜片10的显示面板在不同视角下的归一化亮度，点状线对应采用现有技术中的视角扩散膜片10的显示面板在不同视角下的归一化亮度，细实线对应未采用视角扩散膜片10的显示面板在不同视角下的归一化亮度。由图3可知，在相同的光源下，采用本申请中的视角扩散膜片10的显示面板具有更好的大视角亮度。
基于上述视角扩散膜片10，本申请还提供一种显示面板，如图4所示，所述显示面板包括显示屏体20以及如上述任一实施方式中所述的视角扩散膜片10，所述视角扩散膜片10设置于所述显示屏体20的出光侧。
具体的，所述显示面板还包括设置于所述显示屏体20远离所述视角扩散膜片10的一侧的背光模块30。
需要说明的是，将视角扩散膜片10贴附于显示屏体20上时，视角扩散膜片10具有光线散射作用，此时可无需在背光模块30中增添散射膜片，以降低生产成本。
本发明的有益效果为：显示面板的光源发出的光束射入折射凸起12中时，平行的光线经过曲面上的不同部位折射后的出射光的传播方向不相同，从而使得视角扩散膜片10对于一束入射光存在多个调制角度，增强视角扩散膜片10的调制能力，在应对光源发出的光形较为集中的显示面板时，视角扩散膜片10调制后的出射光的光形更加分散，从而提高大视角显示画面的画质效果。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
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技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种视角扩散膜片，其中，所述视角扩散膜片包括基底以及设置于所述基底的表面的折射凸起；
    其中，所述折射凸起包括远离所述基底的中心的第一侧面，所述第一侧面包括第一曲面。
  2. 根据权利要求1所述的视角扩散膜片，其中，所述第一曲面由所述折射凸起的顶面向所述折射凸起的底面延伸。
  3. 根据权利要求2所述的视角扩散膜片，其中，所述第一曲面沿远离所述折射凸起的中心的方向向下延伸。
  4. 根据权利要求1所述的视角扩散膜片，其中，所述折射凸起的顶面包括第二曲面。
  5. 根据权利要求1所述的视角扩散膜片，其中，所述视角扩散膜片还包括覆盖所述折射凸起的保护层，所述保护层的折射率大于所述折射凸起的折射率。
  6. 根据权利要求5所述的视角扩散膜片，其中，所述折射凸起的顶面包括一外凸面。
  7. 根据权利要求1所述的视角扩散膜片，其中，所述视角扩散膜片还包括偏振膜层，所述偏振膜层设置于所述基底远离所述折射凸起的一侧。
  8. 根据权利要求1所述的视角扩散膜片，其中，多个所述折射凸起相间隔设置。
  9. 根据权利要求1所述的视角扩散膜片，其中，所述折射凸起与所述基底一体成型。
  10. 一种显示面板，其中，所述显示面板包括显示屏体以及视角扩散膜片，所述视角扩散膜片设置于所述显示屏体的出光侧；所述视角扩散膜片包括基底以及设置于所述基底的表面的折射凸起；
    其中，所述折射凸起包括远离所述基底的中心的第一侧面，所述第一侧面包括第一曲面。
  11. 根据权利要求10所述的显示面板，其中，所述第一曲面由所述折射凸起的顶面向所述折射凸起的底面延伸。
  12. 根据权利要求11所述的显示面板，其中，所述第一曲面沿远离所述折射凸起的中心的方向向下延伸。
  13. 根据权利要求10所述的显示面板，其中，所述折射凸起的顶面包括第二曲面。
  14. 根据权利要求10所述的显示面板，其中，所述视角扩散膜片还包括覆盖所述折射凸起的保护层，所述保护层的折射率大于所述折射凸起的折射率。
  15. 根据权利要求14所述的显示面板，其中，所述折射凸起的顶面包括一外凸面。
  16. 根据权利要求10所述的显示面板，其中，所述视角扩散膜片还包括偏振膜层，所述偏振膜层设置于所述基底远离所述折射凸起的一侧。
  17. 根据权利要求10所述的显示面板，其中，多个所述折射凸起相间隔设置。
  18. 根据权利要求10所述的显示面板，其中，所述折射凸起与所述基底一体成型。
  19. 根据权利要求10所述的显示面板，其中，所述折射凸起的顶面的宽度为3～10微米。
  20. 根据权利要求10所述的显示面板，其中，所述折射凸起的底面的宽度为12～20微米。
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