CN103123076A - 背光模组、液晶面板和显示装置 - Google Patents

背光模组、液晶面板和显示装置 Download PDF

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CN103123076A
CN103123076A CN2013100664703A CN201310066470A CN103123076A CN 103123076 A CN103123076 A CN 103123076A CN 2013100664703 A CN2013100664703 A CN 2013100664703A CN 201310066470 A CN201310066470 A CN 201310066470A CN 103123076 A CN103123076 A CN 103123076A
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CN103123076B (zh
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王尚
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BOE Technology Group Co Ltd
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    • 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
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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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    • 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 
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    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • G—PHYSICS
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    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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
    • 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
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    • 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
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Abstract

本发明公开了一种背光模组、液晶面板和显示装置，所述背光模组包括导光板，设置在所述导光板一侧部的多个单色激光光源，以及多条保偏光纤，所述保偏光纤分别接收所述单色激光光源发出的单色光，并将所述单色光传输至所述导光板中。本发明通过采用单色激光光源发光、保偏光纤传输光、导光板全反射光，可得到与液晶面板红、绿、蓝像素相对应的偏振光背光源，无需底起偏片和彩色滤光片，结构简单；由于光源出光为偏振光，提高了液晶屏的透过率，增加了光的利用率；由于光源是激光，其色域范围、色彩鲜明度、色彩的逼真程度都要远远好于现有液晶显示系统中采用的背光源，能够提高显示装置的显示质量。

Description

背光模组、液晶面板和显示装置
技术领域
本发明涉及显示技术领域，特别是涉及一种背光模组、液晶面板和显示装置。
背景技术
传统的液晶显示背光大多采用发射连续光谱的白光发光器件作为背光光源，通过液晶面板下部的起偏片来获得单一方向的线偏振光，再通过液晶面板上部的彩色滤光片（CF）来获得红、绿、蓝（RGB）三原色光，从而得到色域范围内的各种颜色显示。这种方法会使得自然光中与起偏片方向垂直的偏振方向的光波被滤掉，同时滤光片只会允许单一颜色的光出射，而进一步造成背光损失，因此我们需要提出一种不需起偏片和彩色滤光片的新型背光模式。
发明内容
（一）要解决的技术问题
本发明的目的是提供一种结构简单、背光利用率高的背光模组。
（二）技术方案
为了解决上述技术问题，本发明提供一种背光模组，其包括导光板，设置在所述导光板一侧部的多个单色激光光源，以及多条保偏光纤，所述保偏光纤分别接收所述单色激光光源发出的单色光，并将所述单色光传输至所述导光板中。
其中，所述保偏光纤与所述单色激光光源之间设置有扩束耦合器，所述单色激光光源发出的单色光经所述扩束耦合器分别传输至对应的所述保偏光纤。
其中，所述导光板的侧部设置有与像素对应的入光通道。
其中，所述保偏光纤与所述导光板之间设置有光纤耦合器阵列，以将保偏光纤传输的单色光进行排列后传输至所述入光通道。
其中，所述保偏光纤按照其传输的单色光的颜色在所述光纤耦合器阵列上以红、绿、蓝的次序循环排列。
其中，所述导光板上设置有全反射面，所述全反射面可以将单色光全反射至像素区域。
其中，所述全反射面的高度随着其距离入射光侧的距离的增加而增高。
本发明还提供了一种液晶面板，其包括上述任一所述的背光模组。
本发明进一步提供了一种显示装置，其包括上述所述的液晶面板。
（三）有益效果
上述技术方案所提供的背光模组、液晶面板和显示装置，通过采用单色激光光源发光、保偏光纤传输光、导光板全反射光，可得到与液晶面板红、绿、蓝像素相对应的偏振光背光源，无需底起偏片和彩色滤光片，结构简单；由于光源出光为偏振光，提高了液晶屏的透过率，增加了光的利用率；由于光源是激光，其色域范围、色彩鲜明度、色彩的逼真程度都要远远好于现有液晶显示系统中采用的背光源，能够提高显示装置的显示质量。
附图说明
图1是本发明一种实施例背光模组的结构示意图；
图2是图1中背光模组爆炸结构示意图；
图3是图1中背光模组的A-A剖面图；
图4是本发明另一实施例背光模组的结构示意图。
其中，1：单色激光光源；2：扩束耦合器；3：保偏光纤；4：光纤耦合器阵列；5：导光板；6：V型沟道；7：入光通道。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。
参照图1至图3所示，本实施例背光模组包括导光板5，设置在所述导光板5一侧部的多个单色激光光源1，单色激光光源1的数量根据像素的子像素数量来确定，本实施例单色激光光源1具有三个，分别发出红、绿、蓝三单色光，均设置在所述导光板5同一侧部；多条保偏光纤3，分别接收所述单色激光光源1发出的红、绿、蓝三单色光，并将所述单色光传输至所述导光板5中。
导光板5侧部设置有与像素对应的入光通道7，所述单色光经入光通道7进入导光板5，经导光板5上的全反射面进行全反射后，使其垂直于导光板5的出光面射出。
上述背光模组中，三个单色激光光源1分别发射出红、绿、蓝三种颜色的单色光，该种单色光相对于传统的光源冷阴极荧光灯管(CCFL)和发光二极管（LED），具有更好的单色性，并且是很好的线偏振光；每种颜色的单色光分别经多根保偏光纤3传输，可以有效地保持单色激光光源1所发出的线偏振光的单色性和偏振态；保偏光纤3传输的三种颜色的单色光经导光板5侧部设置的入光通道7进入导光板5，导光板5采用导光性能较好的高折射率材料制作，例如玻璃、石英等，入光通道7为导光板5侧部刻画的多个区域，每个区域对应一根保偏光纤3，使得保偏光纤3传输的单色光经入光通道7进入导光板5内；进入导光板5内部的单色光经导光板5底面上的全反射面进行全反射，然后垂直于导光板5的出光面射出，最终射出的光为红、绿、蓝三种颜色的偏振光，在不需要底起偏片和彩色滤光片的情况下，可直接被液晶显示所利用。
为了提高单色激光光源1所发出的单色光的利用率，本实施例在所述保偏光纤3与所述单色激光光源1之间设置了扩束耦合器2，扩束耦合器2具有三个，分别连接在三个单色激光光源1的端部，使所述单色激光光源1发出的单色光经所述扩束耦合器2扩束之后分别传输至对应的多根保偏光纤3，保偏光纤3的数量根据导光板5的尺寸和入光通道7的设置数量来确定。
进一步地，所述保偏光纤3与所述导光板5之间设置有光纤耦合器阵列4，所述光纤耦合器阵列4位于所述入光通道7一侧，以将保偏光纤3传输的单色光进行排列后传输至所述入光通道7。光纤耦合器阵列4具有一个，所述保偏光纤3按照其传输的单色光的颜色在所述光纤耦合器阵列4上以红、绿、蓝的次序循环排列，通过光纤耦合器阵列4将保偏光纤3传输的单色光导入入光通道7。
单色光在由入光通道7进入导光板5内时，传输方向近似平行于导光板5的出光面，为了使背光模组最终射出的光垂直于导光板5的出光面，所述导光板5底面上开设有开口背对其出光面的V型沟道6，所述V型沟道6中朝向所述光入射方向的侧壁为全反射面，该面侧壁设置为斜面，倾斜角度根据光入射方向来确定，另一面侧壁设置为竖直面或斜面均可。所述V型沟道6可以保持线偏振光的偏振方向，通过调节V型沟道6的高度和密度可以使得单色光全反射至像素区域；优选地，V型沟道6的高度会随着其距离单色光入射光侧的距离的增加而增高，目的是使得入光通道7中的光线可以均匀的垂直背光板出光面射出。
上述直接利用单色激光光源来进行背光的模式可以提高红、绿、蓝三色光的纯度。
参照图4所示，为本实施例中另一种结构形式的背光模组，该背光模组的结构与图1至图3中所示的背光模组相似，其不同之处在于三个单色激光光源1设置在导光板5相对的两侧部，相应的，与单色激光光源1对应设置的扩束耦合器2、保偏光纤3和光纤耦合器阵列4也分别位于导光板5相对的两侧部，用于进行光线全反射的V型沟道6的两个侧壁均设置为倾斜的全反射面，以实现红、绿、蓝三种颜色的线偏振光垂直于导光板5出光面射出，并与液晶面板红、绿、蓝像素相对应。
另外，本实施例还提供了一种液晶面板，包括上述所述的背光模组，采用该背光模组，能够省去传统背光模组中的底起偏片和彩色滤光片，直接通过上述背光模组就能够获得与液晶面板红、绿、蓝像素相对应的偏振光背光源，结构简单。
本实施例进一步提供了一种显示装置，可采用上述的背光模组或液晶面板来制作，所述显示装置可以为：液晶面板、电子纸、OLED面板、液晶电视、液晶显示器、数码相框、手机、平板电脑等任何具有显示功能的产品或部件。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和替换，这些改进和替换也应视为本发明的保护范围。

Claims (9)

1.一种背光模组，其特征在于，包括导光板，设置在所述导光板一侧部的多个单色激光光源，以及多条保偏光纤，所述保偏光纤分别接收所述单色激光光源发出的单色光，并将所述单色光传输至所述导光板中。
2.如权利要求1所述的背光模组，其特征在于，所述保偏光纤与所述单色激光光源之间设置有扩束耦合器，所述单色激光光源发出的单色光经所述扩束耦合器分别传输至对应的所述保偏光纤。
3.如权利要求2所述的背光模组，其特征在于，所述导光板的侧部设置有与像素对应的入光通道。
4.如权利要求3所述的背光模组，其特征在于，所述保偏光纤与所述导光板之间设置有光纤耦合器阵列，以将保偏光纤传输的单色光进行排列后传输至所述入光通道。
5.如权利要求4所述的背光模组，其特征在于，所述保偏光纤按照其传输的单色光的颜色在所述光纤耦合器阵列上以红、绿、蓝的次序循环排列。
6.如权利要求1所述的背光模组，其特征在于，所述导光板上设置有全反射面，所述全反射面可以将单色光全反射至像素区域。
7.如权利要求6所述的背光模组，其特征在于，所述全反射面的高度随着其距离单色光入射光侧的距离的增加而增高。
8.一种液晶面板，其特征在于，包括权利要求1-7中任一所述的背光模组。
9.一种显示装置，其特征在于，包括权利要求8所述的液晶面板。
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