CN104698529A - 导光板及具有该导光板的背光模块和液晶显示器 - Google Patents

导光板及具有该导光板的背光模块和液晶显示器 Download PDF

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CN104698529A
CN104698529A CN201510140646.4A CN201510140646A CN104698529A CN 104698529 A CN104698529 A CN 104698529A CN 201510140646 A CN201510140646 A CN 201510140646A CN 104698529 A CN104698529 A CN 104698529A
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light guide
light
incidence surface
guide plate
backlight module
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张彦学
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Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN201510140646.4A priority Critical patent/CN104698529A/zh
Priority to PCT/CN2015/080873 priority patent/WO2016155116A1/zh
Priority to US14/787,571 priority patent/US20170090097A1/en
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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
    • G02B6/0035—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
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough 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
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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

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  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
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Abstract

本发明公开一种导光板，包括入光面(110a)、与所述入光面(110a)相对的非入光面(110b)、位于所述入光面(110a)与所述非入光面(110b)之间且与所述入光面(110a)相对的交汇面(110d)，所述入光面(110a)具有至少一从所述入光面(110a)朝向所述交汇面(110d)渐缩的封闭凹槽(112)，所述交汇面(110d)与所述非入光面(110b)之间填充折射元件(114)。本发明还公开一种具有该导光板的背光模块和液晶显示器。本发明通过在导光板中设置封闭凹槽和折射元件，在提升光的传导率的同时提高光的折射率，从而提高液晶显示面板的亮度的均匀性。

Description

导光板及具有该导光板的背光模块和液晶显示器
技术领域
本发明属于液晶显示技术领域，具体地讲，涉及一种导光板及具有该导光板的背光模块和液晶显示器。
背景技术
背光模块(Back Light Unit，简称BLU)是液晶显示器(Liquid Crystal Display，简称LCD)产品的重要装置之一，目前已普遍应用于数字相机、移动电话、个人数字助理(Personal Digital Assistant，简称PDA)、计算机监视器以及平面电视等相关产品上。一般而言，背光模块(BLU)大多设置于液晶显示面板的背面，包含有光源、导光板、反射片、扩散板以及数种光学膜片或棱镜片。
导光板的作用在于引导光源产生的光线的散射方向，以将背光模块(BLU)中的点光源或线光源转换成面光源而提供给液晶显示面板，用来提高液晶显示面板的亮度，并确保液晶显示面板亮度的均匀性。在现有技术的背光模块的设计中，背光模块提供给液晶显示面板的面光源的均匀性的提升是通过改善导光板底面上的网点来实现的。然而，随着背光模块提供给液晶显示面板的面光源的均匀性被不断地要求提高，仅仅通过改善导光板底面上的网点来实现提高背光模块提供给液晶显示面板的面光源的均匀性将变得十分困难。
发明内容
为了解决上述现有技术存在的问题，本发明提供了一种能够提高光的传导率及提高光的折射率的导光板及具有该导光板的背光模块和液晶显示器。
根据本发明的一方面，提供了一种导光板，包括入光面、与所述入光面相对的非入光面、位于所述入光面与所述非入光面之间且与所述入光面相对的交汇面，所述入光面具有至少一从所述入光面朝向所述交汇面渐缩的封闭凹槽，所述交汇面与所述非入光面之间填充折射元件。
进一步地，所述封闭凹槽呈锥状。
进一步地，所述封闭凹槽呈圆锥状。
进一步地，所述封闭凹槽的底面为一平坦底面。
进一步地，所述折射元件包括多个折射粒子和/或多个气泡。
进一步地，所述入光面与所述交汇面之间的距离等于所述非入光面与所述交汇面之间的距离。
根据本发明的另一方面，提供了一种背光模块，包括上述的导光板及至少一光源，所述光源面向所述导光板的入光面设置，且所述光源对应所述封闭凹槽。
进一步地，所述光源为点光源。
进一步地，所述光源为发光二极管。
根据本发明的又一方面，提供了一种液晶显示器，包括上述的背光模块以及与所述背光模块相对设置的液晶显示面板，所述背光模块向所述液晶显示面板提供显示光源，以使所述液晶显示面板显示图像。
本发明的有益效果：本发明通过在导光板中设置封闭凹槽和折射元件，在提升光的传导率的同时提高光的折射率，从而提高液晶显示面板的亮度的均匀性。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是根据本发明的是实施例的背光模块的俯视透视图；
图2是根据本发明的实施例的背光模块的侧视剖切图；
图3是根据本发明的液晶显示器的结构示意图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。在附图中，为了清楚器件，夸大了层和区域的厚度，相同的标号在整个说明书和附图中可用来表示相同的元件。
图1是根据本发明的是实施例的背光模块的俯视透视图；图2是根据本发明的实施例的背光模块的侧视剖切图。
参照图1和图2，根据本发明的实施例的背光模块100包括导光板110和至少一光源120。各个光源120均以发光面朝向导光板110而设置。需要说明的是，根据本发明的实施例的背光模块100还包括背板、光学膜片等其他必要的光学部件，具体请参照现有技术的描述，在此不再赘述。
在本实施例中，导光板110可为平板型导光板，但本发明并不以此为限，导光板110亦可为楔形导光板。
导光板110包括入光面110a、与入光面110a相对(优选为正相对)的非入光面110b、两侧分别与入光面110a和非入光面110b垂直连接的出光面110c、位于入光面110a与非入光面110b之间且与入光面110a相对(优选为正相对)的交汇面110d。需要说明的是，在本实施例中，为了便于描述，预先设定该交汇面110d。优选地，该交汇面110d沿导光板110的宽度方向平分导光板110，即入光面110a与交汇面110d之间的距离等于非入光面110b与交汇面110d之间的距离。
导光板110的入光面110a具有至少一从入光面110a朝向交汇面110d渐缩的封闭凹槽112。在本实施例中，封闭凹槽112为锥状凹槽，且其底面1121为一平坦底面，但本发明并不以此为限，在其他的实施例中，封闭凹槽112也可以为圆锥状凹槽。
光源120面向导光板110的入光面110a而位于导光板110的一侧，并且光源120与入光面110a上的封闭凹槽112一一对应。在本实施例中，光源120为点光源，更具体的为发光二极管(LED)。
在交汇面110d与非入光面110b之间的导光板110中设置有折射元件114。该折射元件114包括多个折射粒子和/或多个空气气泡。
光源120发出的光线经由入光面110a上的封闭凹槽112进入导光板110内部，进入导光板110内部的光线再经折射元件114折射，最后光线经由出光面110c离开导光板110。在此过程中，封闭凹槽112使光线的传导率大大地提高，折射元件114对光线的折射率进行提升，从而使背光模块100提供给液晶显示面板的亮度更加均匀。
图3是根据本发明的液晶显示器的结构示意图。
参照图3，根据本发明的液晶显示器包括液晶显示面板200及与液晶显示面板200相对设置的图1和图2所示的背光模块100，其中，背光模块100提供显示光源给液晶显示面板200，以使液晶显示面板200显示影像。
液晶显示面板200通常包括薄膜晶体管(Thin Film Transistor，简称TFT)阵列基板210、与TFT阵列基板相对设置的彩色滤光片(Color Filter，简称CF)基板220以及夹设于TFT阵列基板210与CF基板220之间的液晶层230，其中，液晶层230中包括若干液晶分子。由于本发明的液晶显示面板200的具体结构与现有技术的液晶显示面板的结构基本一致，所以在此不再详细描述。
综上，根据本发明的实施例，通过在导光板中设置封闭凹槽和折射元件，在提升光的传导率的同时提高光的折射率，从而提高液晶显示面板的亮度的均匀性。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (10)

1.一种导光板，包括入光面(110a)、与所述入光面(110a)相对的非入光面(110b)、位于所述入光面(110a)与所述非入光面(110b)之间且与所述入光面(110a)相对的交汇面(110d)，其特征在于，所述入光面(110a)具有至少一从所述入光面(110a)朝向所述交汇面(110d)渐缩的封闭凹槽(112)，所述交汇面(110d)与所述非入光面(110b)之间填充折射元件(114)。
2.根据权利要求1所述的导光板，其特征在于，所述封闭凹槽(112)呈锥状。
3.根据权利要求2所述的导光板，其特征在于，所述封闭凹槽(112)呈圆锥状。
4.根据权利要求1所述的导光板，其特征在于，所述封闭凹槽(112)的底面(1121)为一平坦底面。
5.根据权利要求1所述的导光板，其特征在于，所述折射元件(114)包括多个折射粒子和/或多个气泡。
6.根据权利要求1至5任一项所述的导光板，其特征在于，所述入光面(110a)与所述交汇面(110d)之间的距离等于所述非入光面(110b)与所述交汇面(110d)之间的距离。
7.一种背光模块，其特征在于，包括权利要求1至6任一项所述的导光板及至少一光源(120)，所述光源(120)面向所述导光板的入光面(110a)设置，且所述光源(120)对应所述封闭凹槽(112)。
8.根据权利要求7所述的背光模块，其特征在于，所述光源(120)为点光源。
9.根据权利要求8所述的背光模块，其特征在于，所述光源(120)为发光二极管。
10.一种液晶显示器，其特征在于，包括权利要求7至9任一项所述的背光模块以及与所述背光模块相对设置的液晶显示面板(200)，所述背光模块向所述液晶显示面板(200)提供显示光源，以使所述液晶显示面板(200)显示图像。
CN201510140646.4A 2015-03-27 2015-03-27 导光板及具有该导光板的背光模块和液晶显示器 Pending CN104698529A (zh)

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