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CN109358451A - 一种背光模组及其显示装置 - Google Patents

一种背光模组及其显示装置 Download PDF

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Publication number
CN109358451A
CN109358451A CN201811436609.8A CN201811436609A CN109358451A CN 109358451 A CN109358451 A CN 109358451A CN 201811436609 A CN201811436609 A CN 201811436609A CN 109358451 A CN109358451 A CN 109358451A
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guide plate
light guide
backlight module
light
framework
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CN109358451B (zh
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周革革
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US16/612,134 priority patent/US20210341665A1/en
Priority to PCT/CN2019/096456 priority patent/WO2020107897A1/zh
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    • 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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    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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    • 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
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    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
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    • 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
    • G02B6/0021—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 for housing at least a part of the light source, e.g. by forming holes or recesses
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    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • 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
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    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • G—PHYSICS
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    • 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
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    • 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
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    • 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
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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

本发明涉及一种背光模组及其显示装置。其中所述背光模组包括导光板、框体以及光源，所述框体设置于所述导光板周围；所述光源设置于所述导光板与所述框体之间，所述导光板上设置有一通孔，其中所述导光板的通孔后方远离所述光源的侧板上设有外凸部，所述框体对应于所述导光板外凸部的位置处设有一内凹部。这种凸凹设计会形成类似于凹面镜的形状，如此使得光源发出的光线能够在凹凸设计处进行多次反射，从而使更多的光线到达所述通孔的后方，进而提高所述导光板通孔后方的亮度，从而提高整个背光模组的亮度均匀性，提高光学品味，提高客户体验。

Description

一种背光模组及其显示装置
技术领域
本发明涉及显示技术领域，具体涉及一种背光模组及其显示装置。
背景技术
随着液晶显示技术的不断发展，液晶显示器特别是彩色液晶显示器的应用领域也在不断拓宽。受液晶显示器的市场拉动，背光源产业，呈现一派繁荣景象。液晶显示是被动发光元件，显示屏本身并不发光，而是由其下方的背光系统照亮的。背光源和液晶显示屏组合在一起构成了液晶显示模块。液晶背光是一个平面的均匀照明装置，作为光源的冷阴极荧光灯管或LED灯条排列在整个背光源的两边或一边(可能是长边，也可能是短边)。冷阴极灯管是线光源，LED是点光源，把此光源转换为面光源需要使用导光板。导光板一般由高透光率的亚克力塑料制成，表面非常光滑平整，以致于大部分内部光线会在其平整表面上规则的全反射，而不会射出到导光板外部。液晶显示器的导光板的底部印有白色的网点。在导光板印有网点的位置上，光线不再规则的全反射而是会向导光板上方射出。控制每个位置网点的密度就可以控制导光板在这个位置射出光线的多少。精密设计的导光板网点可以让两侧入射的光线均匀的铺散在整个平面上。导光板上方会再放置光学膜片，这些膜片起到均匀光线，并且汇聚大角度光供正面观察等作用。
所谓背光源(BackLight)是位于液晶显示器(LCD)背后的一种光源，它的发光效果将直接影响到液晶显示模块(LCM)视觉效果。背光源主要由光源、导光板、光学用膜片、塑胶框等组成。背光源具有亮度高，寿命长、发光均匀等特点。依光源分布位置不同则分为侧光式背光源和直下式背光源。
侧光式背光源(Edge lighting)为摆在侧边之单支光源，导光板采射出成型无印刷式设计，一般常用于30寸以下中小尺寸的背光模组，其侧边入射的光源设计，拥有轻量、薄型、窄框化、低耗电的特色，亦为手机、平板电脑、笔记型电脑的光源，亦有大尺寸电视背光模组采用侧光式结构。
对于(Bottom lighting)超大尺寸的背光模组，侧光式结构已经无法在重量、消费电力及亮度上占有优势，因此不含导光板且光源放置于正下方的直下式背光源结构便被发展出来。光源由自发性光源(例如灯管、LED等)射出藉由反射板反射后，向上经扩散板均匀分散后于正面射出，因安置空间变大，灯管可依TFT面板大小使用2至多之灯管，但同时也增加了模组的厚度、重量、耗电量、其优点为高辉度、良好的出光视角、光利用效率高、结构简易化等，因而适用于对可携性及空间要求较不挑剔的LCD显示器与LCD TV。
随着LCD模组不断向更亮、更轻、更薄方向发展，侧光式CCFL式背光源成为背光源发展的主流。目前的实际运用过程中，技术人员会在背光模组中开设一个通孔，用以放置摄像头。现有背光模组的通孔设计中，根据光线在导光板中的传播路线，导光板通孔后方的光线偏少，导致背光模组中通孔后亮度偏暗，导致整面亮度均匀性低，影响光学品味，客户体验差。因此需要寻求一种解决导光板通孔后亮度偏暗，整面亮度均匀性低，影响品味，客户体验差等问题的方法。
发明内容
本发明的一个目的是提供一种背光模组，其能够解决目前背光模组的通孔设计中，导光板通孔后亮度偏暗、整面亮度均匀性低、光学品味低的问题。
为了解决上述问题，本发明提供一种背光模组，包括框体、导光板、以及光源。其中所述框体设置于所述导光板周围；所述光源设置于所述导光板与所述框体之间，所述导光板上设置有一通孔，其中所述导光板的通孔后方远离所述光源的侧板上设有外凸部。
进一步的，其中所述外凸部的表面形状包括圆弧形。
进一步的，其中所述框体对应于所述导光板外凸部的位置处设有一内凹部。
进一步的，其中所述内凹部的形状对应于所述外凸部的形状。
进一步的，其中所述内凹部的表面形状包括圆弧形。
进一步地，其中所述的背光模组，还包括：背板、反射片以及光学膜片。其中所述反射片设置于所述背板上，所述导光板设置于所述反射片上；所述光学膜片设置于所述导光板上。
进一步地，其中所述的背光模组，还包括灯条电路板和遮光胶。其中所述灯条电路板与所述光源相连，所述遮光胶设置于所述灯条电路板上。
进一步地，其中所述光学膜片包括：下扩散片、棱镜片以及上扩散片。所述下扩散片设置于所述导光板上；所述棱镜片设置于所述下扩散片上；所述上扩散片设置于所述棱镜片上。
进一步地，其中所述灯条电路板通过双面胶连接于所述框体和导光板上。
进一步的，本发明的又一目的是提供一种显示装置，其包括本发明涉及的所述背光模组。
本发明的优点是：本发明涉及一种背光模组及其显示装置，其通过在所述导光板的通孔后方远离所述光源的侧板上设置外凸部，同时在所述框体对应于所述导光板外凸部的位置处设置内凹部，这种凸凹设计会形成类似于凹面镜的形状，如此使得光源发出的光线能够在凹凸设计处进行多次反射，从而使更多的光线到达所述通孔的后方，进而提高所述导光板通孔后方的亮度，从而提高整个背光模组的亮度均匀性，提高光学品味，提高客户体验。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明背光模组的结构示意图。
图2是本发明导光板及框体的俯视图。
图中部件标识如下：
1、反射片 2、导光板
3、光学膜片 4、框体
5、光源 6、灯条电路板
7、遮光胶 8、双面胶
21、第一侧板 22、第二侧板
23、通孔 24、圆弧外凸部
41、第一侧框 42、第二侧框
43、圆弧内凹部
具体实施方式
以下结合说明书附图详细说明本发明的优选实施例，以向本领域中的技术人员完整介绍本发明的技术内容，以举例证明本发明可以实施，使得本发明公开的技术内容更加清楚，使得本领域的技术人员更容易理解如何实施本发明。然而本发明可以通过许多不同形式的实施例来得以体现，本发明的保护范围并非仅限于文中提到的实施例，下文实施例的说明并非用来限制本发明的范围。
本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是附图中的方向，本文所使用的方向用语是用来解释和说明本发明，而不是用来限定本发明的保护范围。
在附图中，结构相同的部件以相同数字标号表示，各处结构或功能相似的组件以相似数字标号表示。此外，为了便于理解和描述，附图所示的每一组件的尺寸和厚度是任意示出的，本发明并没有限定每个组件的尺寸和厚度。
当某些组件，被描述为“在”另一组件“上”时，所述组件可以直接置于所述另一组件上；也可以存在一中间组件，所述组件置于所述中间组件上，且所述中间组件置于另一组件上。当一个组件被描述为“安装至”或“连接至”另一组件时，二者可以理解为直接“安装”或“连接”，或者一个组件通过一中间组件“安装至”或“连接至”另一个组件。
如图1所示，本发明的背光模组结构示意图。其中包括：背板(图未示)、反射片1、导光板2、光学膜片3、框体4、光源5、灯条电路板6以及遮光胶7。
其中，所述反射片1设置于所述背板上，主要用于将导光板2底部露出的光反射回导光板2中，用来提高光线的可利用率。
如图1、图2所示，所述导光板2设置于所述反射片1上。所述导光板2包括第一侧板21和对应于第一侧板21设置的第二侧板22。所述框体4设置于所述导光板2周围。所述框体4包括平行于第一侧板21的第一侧框41和平行于第二侧板22的第二侧框42。所述光源5设置于所述第一侧板21和所述第一侧框41之间，所述导光板2上设有一通孔23；所述导光板2通孔23后方的第二侧板22上设置一圆弧外凸部24，所述框体4的第二侧框42对应于所述第二侧板22的圆弧外凸部24处设置有一圆弧内凹部43。通过第二侧板22的圆弧外凸24以及第二侧框42的圆弧内凹部43的设计，形成类似于凹面镜的形状，使光线在凹凸设计处进行多次反射，从而使更多的光线到达通孔后方，提高导光板通孔后方的亮度，从而提高整个背光模组的亮度均匀性，提高光学品味，提高客户体验满意度。
其中，所述光学膜片3设置于所述导光板2上。具体的包括：下扩散片、棱镜片以及上扩散片。所述下扩散片设置于所述导光板上；所述棱镜片设置于所述下扩散片上；所述上扩散片设置于所述棱镜片上；所述遮光片设置于所述上扩散片上。其中下扩散片、上扩散片内有很多颗粒状的物体，可以将导光板2收到的光进行扩散，使光线能够向显示面板的正面方向传播，起到拓宽视角，隐蔽形成在导光板2上的图案的作用。棱镜片可以将扩散的光集中在一定角度内射出，以达到提高显示面板亮度的目的。
其中，所述灯条电路板6与所述光源5相连，所述灯条电路板6通过双面胶8固定于所述框体4和导光板2上。
其中，所述遮光胶7设置于所述灯条电路板6上。主要是用于定位光学膜片3并且进行显示装置的框体4的侧面遮光。
本发明还提供了一种显示装置，包括上述背光模组。由于所述背光模组结构相同，技术效果相同，因此在此不再赘述。
以上对本发明所提供的背光模组及其显示装置进行了详细介绍。应理解，本文所述的示例性实施方式应仅被认为是描述性的，用于帮助理解本发明的方法及其核心思想，而并不用于限制本发明。在每个示例性实施方式中对特征或方面的描述通常应被视作适用于其他示例性实施例中的类似特征或方面。尽管参考示例性实施例描述了本发明，但可建议所属领域的技术人员进行各种变化和更改。本发明意图涵盖所附权利要求书的范围内的这些变化和更改。
以上仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

1.一种背光模组，其特征在于，包括：
导光板，
框体，所述框体设置于所述导光板周围；
光源，所述光源设置于所述导光板与所述框体之间；
所述导光板上设有一通孔；以及
所述导光板的通孔后方远离所述光源的侧板上设有外凸部。
2.根据权利要求1所述的背光模组，其特征在于，所述外凸部的表面形状包括圆弧形。
3.根据权利要求1所述的背光模组，其特征在于，所述框体对应于所述导光板外凸部的位置处设有一内凹部。
4.根据权利要求3所述的背光模组，其特征在于，所述内凹部的形状对应于所述外凸部的形状。
5.根据权利要求4所述的背光模组，其特征在于，所述内凹部的表面形状包括圆弧形。
6.根据权利要求1所述的背光模组，其特征在于，还包括：
背板；
反射片，所述反射片设置于所述背板上，所述导光板设置于所述反射片上；以及
光学膜片，所述光学膜片设置于所述导光板上。
7.根据权利要求1所述的背光模组，其特征在于，还包括：
灯条电路板，所述灯条电路板与所述光源相连；
遮光胶，所述遮光胶设置于所述灯条电路板上。
8.根据权利要求6所述的背光模组，其特征在于，所述光学膜片包括：
下扩散片，所述下扩散片设置于所述导光板上；
棱镜片，所述棱镜片设置于所述下扩散片上；以及
上扩散片，所述上扩散片设置于所述棱镜片上。
9.根据权利要求7所述的背光模组，其特征在于，所述灯条电路板通过双面胶连接于所述框体和导光板上。
10.一种显示装置，其特征在于，包括：权利要求1-9所述的背光模组。
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