WO2016082247A1 - 导光板、背光模组及显示器 - Google Patents

导光板、背光模组及显示器 Download PDF

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Publication number
WO2016082247A1
WO2016082247A1 PCT/CN2014/093325 CN2014093325W WO2016082247A1 WO 2016082247 A1 WO2016082247 A1 WO 2016082247A1 CN 2014093325 W CN2014093325 W CN 2014093325W WO 2016082247 A1 WO2016082247 A1 WO 2016082247A1
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WIPO (PCT)
Prior art keywords
light
guide plate
light guide
sides
high reflectivity
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PCT/CN2014/093325
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English (en)
French (fr)
Inventor
周革革
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US14/412,684 priority Critical patent/US9632231B2/en
Publication of WO2016082247A1 publication Critical patent/WO2016082247A1/zh

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    • 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
    • G02B6/0055—Reflecting element, 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
    • 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
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a light guide plate, a backlight module, and a display.
  • the backlight module includes a light guide plate and a plurality of point light sources, and the light emitted by the plurality of point light sources is reflected or scattered by the microstructures on the light guide plate, and can be uniformly emitted from the light exit surface of the light guide plate.
  • the microstructure on the light guide plate has a good light guiding effect, it also absorbs a part of the light, resulting in loss of light energy.
  • the light emitted from the light-emitting surface of the light guide plate is far from the light source, and the light emitted from the light source is dark, so that the light guide plate has uneven light emission;
  • the angle of the light exiting, the dark surface of the light-emitting surface corresponding to the gap between the two point light sources will further form a dark area, which further aggravates the unevenness of the light output of the light guide plate.
  • the embodiment of the invention provides a light guide plate, a backlight module and a display, which can improve the uniformity of light emission of the light guide plate and reduce optical loss.
  • a first aspect of the present invention provides a light guide plate, the light guide plate includes a light emitting surface, a reflecting surface opposite to the light emitting surface, and at least one light incident connected to the light emitting surface and the reflecting surface surface,
  • the reflective surface is provided with a plurality of microprojection structures protruding toward the interior of the light guide plate, each of the microprojection structures including at least two sides coated with a high reflectivity material, the at least two coatings High anti
  • the sides of the radiance material form at least one angle toward the at least one light incident surface, the density of the microprojection structure distribution decreasing as the distance from the light source increases.
  • the light guide plate further includes two sides connected to the light exit surface, the reflective surface, and the at least one light incident surface, wherein the two sides of the light guide plate are respectively associated with the microprotrusion structure At least two sides coated with a high reflectivity material each form an included angle of less than 90°.
  • the light guide plate includes a light incident surface
  • the microprojection structure includes two sides coated with a high reflectivity material, the sides of which are coated with a high reflectivity material, respectively forming an angle of less than 90[deg.] with the two sides of the light guide.
  • the microprojection structure is a triangular pyramid, a triangular prism or a triangular prism.
  • the light guide plate includes two opposite light incident surfaces
  • the microprojection structure includes four sides coated with a high reflectivity material
  • the four sides coated with the high reflectivity material form an angle of less than 90° with the two sides of the light guide plate, respectively.
  • the microprojection structure is a quadrangular pyramid, a quadrangular prism or a quadrangular prism.
  • the spacing between the microprojection structures is from 50 ⁇ m to 500 ⁇ m.
  • the bottom side of the microprojection structure has a length of 50 ⁇ m to 100 ⁇ m.
  • a second aspect of the present invention provides a backlight module, comprising the light guide plate and the plurality of light sources according to the first aspect; the plurality of light sources are distributed along at least one light incident surface of the light guide plate.
  • a third aspect of the embodiments of the present invention provides a display, comprising the backlight module of the second aspect.
  • a plurality of micro-protrusions are disposed on a surface of the light guide plate opposite to the light-emitting surface, and the incident light can be reflected to a position corresponding to the gap of the light source in a direction away from the light source to avoid forming a dark region on the light guide plate;
  • the density of the structure distribution decreases as the distance from the light source increases, reducing the absorption loss of light away from the light source, and the reflection near the light source is stronger, and more light can be reflected away from the light source, further improving Uniformity of light output from the light guide plate.
  • FIG. 1 is a schematic structural view of an embodiment of a light guide plate according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of another embodiment of a light guide plate according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of still another embodiment of a light guide plate according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of still another embodiment of a light guide plate according to an embodiment of the present invention.
  • the embodiment of the invention provides a light guide plate, a backlight module and a display, which can improve the uniformity of light emission of the light guide plate and reduce optical loss.
  • FIG. 1 is a schematic structural diagram of an embodiment of a light guide plate according to an embodiment of the present invention.
  • the light guide plate 10 includes a light exit surface, a reflective surface 104 opposite to the light exit surface, and at least one light incident surface 102 connected to the light exit surface and the reflective surface 104.
  • a plurality of microprojection structures 101 protruding toward the inside of the light guide plate 10 are disposed on each of the wafers 104, and each of the microprojection structures 101 includes at least two sides 1011 coated with a high reflectivity material, the at least two being coated with The side surface 1011 of the high reflectivity material forms at least one angle toward the at least one light incident surface 102, and the density of the distribution of the microprojection structure 101 decreases as the distance from the light source 20 increases, that is, the closer the distance from the light source 20 is. At this point, the density of the distribution of the microprojection structure 101 is greater.
  • the light emitted by the light source 20 is reflected by the at least two side faces 1011 of the micro-protrusion structure 101, and is irradiated toward the position corresponding to the gap of the light source 20 and away from the light source 20, thereby
  • the brightness of the light guide plate at the position corresponding to the gap of the light source 20 is enhanced to avoid the formation of dark areas.
  • the high reflectivity material coated on the two side faces 1011 of the microprojection structure 101 has a certain absorption effect on the light, and the light entering from the light incident surface 102 is reflected and partially absorbed by the plurality of microprojection structures 101.
  • the light reaching the light source 20 in the light guide plate 10 is lower than the brightness of the light source 20
  • the brightness at the source 20 is approached.
  • the density of the micro-protrusion structure 101 near the light source 20 is relatively large, and the light can be better reflected to a position corresponding to the gap of the light source 20 and a position away from the light source, thereby further improving the light-emitting uniformity of the light guide plate.
  • the two sides 1011 of the microprojection structure 101 coated with the high reflectivity material form an angle with the two side faces 103 of the light guide plate 10, respectively, ⁇ and ⁇ , and ⁇ and ⁇ are smaller than 90°.
  • the light guide plate 10 includes a light incident surface 102; at this time, the microprojection structure 101 includes two sides 1011 coated with a high reflectivity material, the two coated with a high reflectivity material.
  • the side faces 1011 form an angle of less than 90° with the two side faces 103 of the light guide plate 10, respectively, and the angles formed by the two sides 1011 coated with the high reflectivity material are directed to the light incident face 102.
  • the shape of the microprojection structure 101 at this time may be at least one of a triangular pyramid, a triangular pyramid, or a triangular prism.
  • the light guide plate 10 includes two opposite light incident surfaces 102; at this time, the microprojection structure 101 includes four sides 1011 coated with a high reflectivity material.
  • the four sides 1011 coated with the high reflectivity material respectively form an angle of less than 90° with the two side faces 103 of the light guide plate 10, and the two sides 1011 coated with the high reflectivity material are formed. The angles are respectively directed to the two opposite light incident faces 102.
  • the shape of the microprojection structure 101 at this time may be any one of a quadrangular pyramid, a quadrangular prism, or a quadrangular prism.
  • the micro-protrusion structure 101 may be disposed corresponding to the light source 20.
  • the density of the micro-protrusion structure 101 corresponding to the gap of the light source 20 in the light guide plate 10 may be set small, or the micro-protrusion structure 101 may not be disposed corresponding to the gap of the light source 20 in the light guide plate 10.
  • the light source 20 may be disposed to be staggered along the two opposite light incident surfaces 102 of the light guide plate 10.
  • the spacing between the micro-protrusion structures 101 may be set between 50 ⁇ m and 500 ⁇ m; the bottom side length of the micro-protrusion structure 101 may be set between 50 ⁇ m and 100 ⁇ m.
  • Micro-bump The bottom surface of the structure 101 refers to the side where the microprojection structure 101 intersects the reflecting surface 104 of the light guide plate 10.
  • a plurality of micro-protrusion structures are disposed on a surface opposite to the light-emitting surface, and the incident light can be reflected to a position corresponding to the gap of the light source in a direction away from the light source, thereby avoiding formation of a dark region on the light guide plate;
  • the density of the structure distribution decreases as the distance from the light source increases, reducing the absorption loss of light away from the light source, and the reflection near the light source is stronger, and more light can be reflected away from the light source, further improving Uniformity of light output from the light guide plate.
  • the embodiment of the present invention further provides a backlight module, which comprises the light guide plate as described in any of the embodiments of FIG.
  • the embodiment of the invention further provides a display, which comprises the above backlight module.
  • the backlight module and the display of the embodiment of the invention can reflect the light to a position corresponding to the gap of the light source in the direction away from the light source, and can reduce the absorption loss of the light from the light source away from the light source, and improve the uniformity of the emitted light.

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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)
  • Planar Illumination Modules (AREA)

Abstract

一种导光板、背光模组及显示器，其中所述导光板（10）包括一出光面、一与所述出光面相对的反射面（104）以及至少一个与所述出光面和所述反射面（104）相连的入光面（102），所述反射面（104）上设有多个向所述导光板（10）内部凸起的微突起结构（101），每个所述微突起结构（101）包括至少两个涂覆有高反射率材料的侧面（1011），所述至少两个涂覆有高反射率材料的侧面（1011）形成至少一个朝向所述至少一个入光面（102）的夹角，所述微突起结构（101）分布的密度随着与光源的距离增加而减小。采用该导光板可以将光线反射到远离光源方向上光源的间隙对应的位置，并可以减少导光板远离光源之处对光线的吸收损耗，提高出射光线的均匀性。

Description

导光板、背光模组及显示器
本发明要求2014年11月26日递交的发明名称为“导光板、背光模组及显示器”的申请号201410698370.7的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及显示技术领域，尤其涉及一种导光板、背光模组及显示器。
背景技术
在显示技术领域，目前市场上应用较多的显示器是液晶显示器(Liquid Crystal Display，LCD)。液晶显示器中的液晶分子不具备发光特性，需要依靠背光模组发光来达到显示的效果。一般来说，背光模组包括导光板和多个点光源，多个点光源发出的光线经过导光板上微结构的反射或散射作用，可以从导光板的出光面较均匀地出射。导光板上的微结构虽然具有较好的导光效果，但是也会吸收一部分光线，造成光能损失。
现有技术中，一方面由于光线在传输过程中的损失，导光板出光面上距离光源较远的地方出射的光线亮度较暗，使得导光板出光不均匀；另一方面，由于点光源具有特定的出光角度，导光板出光面上对应两个点光源的间隙之处会形成暗区，进一步加剧导光板出光的不均匀。
发明内容
本发明实施例提供一种导光板、背光模组及显示器，可提高导光板出光的均匀度并减少光损耗。
本发明实施例第一方面提供了一种导光板，所述导光板包括一出光面、一与所述出光面相对的反射面以及至少一个与所述出光面和所述反射面相连的入光面，
所述反射面上设有多个向所述导光板内部凸起的微突起结构，每个所述微突起结构包括至少两个涂覆有高反射率材料的侧面，所述至少两个涂覆有高反 射率材料的侧面形成至少一个朝向所述至少一个入光面的夹角，所述微突起结构分布的密度随着与光源的距离增加而减小。
可选地，所述导光板还包括两个与所述出光面、所述反射面以及所述至少一个入光面相连的侧面，所述导光板的两个侧面分别与所述微突起结构的至少两个涂覆有高反射率材料的侧面分别形成小于90°的夹角。
可选地，所述导光板包括一个入光面；
所述微突起结构包括两个涂覆有高反射率材料的侧面，所述两个涂覆有高反射率材料的侧面分别与所述导光板的两个侧面形成小于90°的夹角。
可选地，所述微突起结构为三棱锥、三棱柱或三棱台。
可选地，所述导光板包括两个相对的入光面；
所述微突起结构包括四个涂覆有高反射率材料的侧面；
所述四个涂覆有高反射率材料的侧面分别与所述导光板的两个侧面形成小于90°的夹角。
可选地，所述微突起结构为四棱锥、四棱柱或四棱台。
可选地，所述微突起结构之间的间距为50μm-500μm。
可选地，所述微突起结构的底面边长为50μm-100μm。
本发明实施例第二方面提供了一种背光模组，包括如第一方面所述的导光板和多个光源；所述多个光源沿所述导光板的至少一个入光面分布。
本发明实施例第三方面提供了一种显示器，包括如第二方面所述的背光模组。
采用本发明实施例，在导光板与出光面相对的一面设置多个微突起结构，可以将入射光线反射到远离光源的方向上光源的间隙对应的位置，避免导光板上形成暗区；微突起结构分布的密度随着与光源的距离增加而减小，减少远离光源之处对光的吸收损耗，同时接近光源处的反射作用更强，可以将更多光线反射到远离光源的方向，进一步提高导光板出光的均匀性。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术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 中的附图是本发明的一些实施例，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是本发明实施例提供的导光板的一实施例的结构示意图；
图2是本发明实施例提供的导光板的另一实施例的结构示意图；
图3是本发明实施例提供的导光板的又一实施例的结构示意图；
图4是本发明实施例提供的导光板的又一实施例的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例提供一种导光板、背光模组及显示器，可提高导光板出光的均匀度并减少光损耗，下面将结合附图对本发明的实施例进行详细说明。
参见图1，为本发明实施例提供的导光板的一实施例的结构示意图。如图1所示，导光板10包括一出光面、一与所述出光面相对的反射面104以及至少一个与所述出光面和所述反射面104相连的入光面102，所述反射面104上设有多个向所述导光板10内部凸起的微突起结构101，每个微突起结构101包括至少两个涂覆有高反射率材料的侧面1011，所述至少两个涂覆有高反射率材料的侧面1011形成至少一个朝向所述至少一个入光面102的夹角，微突起结构101分布的密度随着与光源20的距离增加而减小，即与光源20距离越近之处，微突起结构101分布的密度越大。
请一并参见图2，如图2所示，光源20发出的光线经过微突起结构101的至少两个侧面1011反射后，往光源20的间隙对应的位置且远离光源20的方向照射，从而可以增强导光板在光源20的间隙对应的位置的出光亮度，避免暗区的形成。
具体实施中，微突起结构101的两个侧面1011上涂覆的高反射率材料对光线有一定的吸收作用，从入光面102进入的光线经过多个微突起结构101反射和部分吸收后，到达导光板10内远离光源20处的光线，其亮度已经低于 接近光源20处的亮度。通过减小远离光源20处微突起结构101的密度，可以减少光线在远离光源20处的吸收损耗，进而减小导光板10在远离光源20处和靠近光源20处出光亮度的差异，提高出光的均匀度。而接近光源20处微突起结构101的密度较大，可以更好地将光线反射到与光源20的间隙对应的位置和远离光源的位置，进一步提高导光板的出光均匀度。
进一步地，如图2所示，微突起结构101的两个涂覆有高反射率材料的侧面1011与导光板10的两个侧面103形成的夹角分别为α和β，α和β均小于90°。
在一些可行的实施方式中，导光板10包括一个入光面102；此时微突起结构101包括两个涂覆有高反射率材料的侧面1011，所述两个涂覆有高反射率材料的侧面1011分别与导光板10的两个侧面103形成小于90°的夹角，所述两个涂覆有高反射率材料的侧面1011形成的夹角指向所述入光面102。
可选地，此时微突起结构101的形状可以是三棱锥、三棱锥或三棱台中任意至少一种。
在另一些可行的实施方式中，如图3所示，导光板10包括两个相对的入光面102；此时此时微突起结构101包括四个涂覆有高反射率材料的侧面1011，所述四个涂覆有高反射率材料的侧面1011分别与导光板10的两个侧面103形成小于90°的夹角，所述四个涂覆有高反射率材料的侧面1011形成的两个夹角分别指向所述两个相对的入光面102。
可选地，此时微突起结构101的形状可以是四棱锥、四棱柱或四棱台中任意一种。
具体实施中，为免光线在光源20的间隙对应的位置被进一步削弱，微突起结构101可对应光源20设置。具体地，可设置导光板10内光源20的间隙对应处微突起结构101的密度较小，或在导光板10内光源20的间隙对应处不设置微突起结构101。
具体实施中，如图4所示，可以设置光源20在导光板10的两个相对的入光面102旁错开分布。
具体实施中，微突起结构101之间的间距可以设置在50μm-500μm之间；微突起结构101的底面边长可以设置在50μm-100μm之间。其中微突 起结构101的底面指的是微突起结构101与导光板10的反射面104相交的一面。
本发明实施例的导光板，在与出光面相对的一面设置多个微突起结构，可以将入射光线反射到远离光源的方向上光源的间隙对应的位置，避免导光板上形成暗区；微突起结构分布的密度随着与光源的距离增加而减小，减少远离光源之处对光的吸收损耗，同时接近光源处的反射作用更强，可以将更多光线反射到远离光源的方向，进一步提高导光板出光的均匀性。
相应地，本发明实施例还提供了一种背光模组，该背光模组包括如图1-4任一实施例所描述的导光板。
相应地，本发明实施例还提供了一种显示器，该显示器包括上述背光模组。
本发明实施例的背光模组和显示器，能够将光线反射到远离光源方向上光源的间隙对应的位置，并可以减少导光板远离光源之处对光线的吸收损耗，提高出射光线的均匀性。
以上所述的实施方式，并不构成对该技术方案保护范围的限定。任何在上述实施方式的精神和原则之内所作的修改、等同替换和改进等，均应包含在该技术方案的保护范围之内。

Claims (20)

  1. 一种导光板，所述导光板包括一出光面、一与所述出光面相对的反射面以及至少一个与所述出光面和所述反射面相连的入光面，其特征在于：
    所述反射面上设有多个向所述导光板内部凸起的微突起结构，每个所述微突起结构包括至少两个涂覆有高反射率材料的侧面，所述至少两个涂覆有高反射率材料的侧面形成至少一个朝向所述至少一个入光面的夹角，所述微突起结构分布的密度随着与光源的距离增加而减小。
  2. 根据权利要求1所述的导光板，其特征在于：
    所述导光板还包括两个与所述出光面、所述反射面以及所述至少一个入光面相连的侧面，所述导光板的两个侧面分别与所述微突起结构的至少两个涂覆有高反射率材料的侧面分别形成小于90°的夹角。
  3. 根据权利要求2所述的导光板，其特征在于：
    所述导光板包括一个入光面；
    所述微突起结构包括两个涂覆有高反射率材料的侧面，所述两个涂覆有高反射率材料的侧面分别与所述导光板的两个侧面形成小于90°的夹角。
  4. 根据权利要求3所述的导光板，其特征在于：
    所述微突起结构为三棱锥、三棱柱或三棱台。
  5. 根据权利要求2所述的导光板，其特征在于：
    所述导光板包括两个相对的入光面；
    所述微突起结构包括四个涂覆有高反射率材料的侧面；
    所述四个涂覆有高反射率材料的侧面分别与所述导光板的两个侧面形成小于90°的夹角。
  6. 根据权利要求5所述的导光板，其特征在于：
    所述微突起结构为四棱锥、四棱柱或四棱台。
  7. 根据权利要求1所述的导光板，其特征在于：
    所述微突起结构之间的间距为50μm-500μm。
  8. 根据权利要求1所述的导光板，其特征在于：
    所述微突起结构的底面边长为50μm-100μm。
  9. 一种背光模组，包括一导光板和沿所述导光板的至少一个入光面分布的多个光源；所述导光板包括一出光面、一与所述出光面相对的反射面以及至少一个与所述出光面和所述反射面相连的入光面，其特征在于：
    所述反射面上设有多个向所述导光板内部凸起的微突起结构，每个所述微突起结构包括至少两个涂覆有高反射率材料的侧面，所述至少两个涂覆有高反射率材料的侧面形成至少一个朝向所述至少一个入光面的夹角，所述微突起结构分布的密度随着与光源的距离增加而减小。
  10. 根据权利要求9所述的背光模组，其特征在于：
    所述导光板还包括两个与所述出光面、所述反射面以及所述至少一个入光面相连的侧面，所述导光板的两个侧面分别与所述微突起结构的至少两个涂覆有高反射率材料的侧面分别形成小于90°的夹角。
  11. 根据权利要求10所述的背光模组，其特征在于：
    所述导光板包括一个入光面；
    所述微突起结构包括两个涂覆有高反射率材料的侧面，所述两个涂覆有高反射率材料的侧面分别与所述导光板的两个侧面形成小于90°的夹角。
  12. 根据权利要求11所述的背光模组，其特征在于：
    所述微突起结构为三棱锥、三棱柱或三棱台。
  13. 根据权利要求10所述的背光模组，其特征在于：
    所述导光板包括两个相对的入光面；
    所述微突起结构包括四个涂覆有高反射率材料的侧面；
    所述四个涂覆有高反射率材料的侧面分别与所述导光板的两个侧面形成小于90°的夹角。
  14. 根据权利要求13所述的背光模组，其特征在于：
    所述微突起结构为四棱锥、四棱柱或四棱台。
  15. 一种显示器，包括至少一背光模组，所述背光模组包括一导光板和沿所述导光板的至少一个入光面分布的多个光源；所述导光板包括一出光面、一与所述出光面相对的反射面以及至少一个与所述出光面和所述反射面相连的入光面，其特征在于：
    所述反射面上设有多个向所述导光板内部凸起的微突起结构，每个所述微突起结构包括至少两个涂覆有高反射率材料的侧面，所述至少两个涂覆有高反射率材料的侧面形成至少一个朝向所述至少一个入光面的夹角，所述微突起结构分布的密度随着与光源的距离增加而减小。
  16. 根据权利要求15所述的显示器，其特征在于：
    所述导光板还包括两个与所述出光面、所述反射面以及所述至少一个入光面相连的侧面，所述导光板的两个侧面分别与所述微突起结构的至少两个涂覆有高反射率材料的侧面分别形成小于90°的夹角。
  17. 根据权利要求16所述的显示器，其特征在于：
    所述导光板包括一个入光面；
    所述微突起结构包括两个涂覆有高反射率材料的侧面，所述两个涂覆有高反射率材料的侧面分别与所述导光板的两个侧面形成小于90°的夹角。
  18. 根据权利要求17所述的显示器，其特征在于：
    所述微突起结构为三棱锥、三棱柱或三棱台。
  19. 根据权利要求16所述的显示器，其特征在于：
    所述导光板包括两个相对的入光面；
    所述微突起结构包括四个涂覆有高反射率材料的侧面；
    所述四个涂覆有高反射率材料的侧面分别与所述导光板的两个侧面形成小于90°的夹角。
  20. 根据权利要求19所述的显示器，其特征在于：
    所述微突起结构为四棱锥、四棱柱或四棱台。
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