CN104991378A - 一种背光模组及液晶显示装置 - Google Patents

一种背光模组及液晶显示装置 Download PDF

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CN104991378A
CN104991378A CN201510400970.5A CN201510400970A CN104991378A CN 104991378 A CN104991378 A CN 104991378A CN 201510400970 A CN201510400970 A CN 201510400970A CN 104991378 A CN104991378 A CN 104991378A
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quantum dot
dot layer
graphite flake
backlight module
light guide
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CN104991378B (zh
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程艳
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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 PCT/CN2015/089241 priority patent/WO2017004888A1/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
    • 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
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
    • 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
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—Means for removing heat created by the light source from the package
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
    • 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
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    • G02F1/133628—Illuminating devices with cooling means

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Abstract

本发明公开了一种背光模组及液晶显示装置，其中，所述背光模组包括LED组件、导光板，还包括量子点层及石墨片，所述量子点层设置在所述LED组件与所述导光板之间，所述量子点层设置在所述石墨片上，由于将量子点层设置在石墨片上，可以对量子点层进行散热，防止量子点层由于温度过高而失效，一定程度上延长量子点层的使用寿命，提高显示品质。

Description

一种背光模组及液晶显示装置
技术领域
本发明涉及显示液晶领域，尤其涉及一种背光模组及液晶显示装置。
背景技术
目前，液晶显示器件(包括平板显示设备)的色域水平普遍在72％左右，甚至更低。为了提高色域，量子点背光源技术应运而生，其能够将显示产品的色域提高至100％，极大地丰富了显示产品的表现能力。但量子点的一些缺陷限制了其在背光领域的应用：一、量子点的抗热性差，达到一定温度下极易老化失效，限制了其直接封装于LED芯片上的应用；二、若采用量子点玻璃管的背光模组，由于量子点玻璃管的固定方式复杂，且制作困难，因而实施起来成本较大；三、采用量子点薄膜的背光模组，由于使用过多的散射膜，因此增加了光的损耗。因此，有必要对量子点在背光源模组的应用进行改进，以提高其实用性。
发明内容
针对现有技术中，量子点应用在背光模组中容易因温度过高而出现老化失效的情况，本发明的主要目的在于提供一种背光模组及液晶显示装置。
本发明提供的一种背光模组，包括LED组件、导光板，还包括量子点层及石墨片，所述量子点层设置在所述LED组件与所述导光板之间，所述量子点层设置在所述石墨片上。
优选地，所述量子点层贴合所述导光板的入光面设置。
优选地，所述量子点层与所述石墨片接触的一面设置有两个以上第一凸起，所述石墨片上开设有供所述凸起插入的第一孔，所述量子点层插设在所述石墨片上。
优选地，所述LED灯组为LED灯条，所述LED灯条粘贴在所述石墨片上。
优选地，所述LED灯组为LED灯条，所述LED灯条与所述石墨片接触的一侧设置有两个以上第二凸起，所述石墨片上设置有供所述第二凸起插入的第二孔。
优选地，还包括设置在所述导光板底面的反射片。
优选地，所述反射片与所述石墨片的厚度一致，所述石墨片与所述反射片贴合对接设置。
优选地，所述导光板在入光面处形成一突出部，所述突出部的高度大于导光板的高度，该突出部朝导光板的出光面形成一斜面。
优选地，所述导光板为平板或契形板。
本发明还提供一种液晶显示装置，包括上述的背光模组。
本发明提供的一种背光结构及液晶显示装置，由于将量子点层设置在石墨片上，可以对量子点层进行散热，防止量子点层由于温度过高而失效，一定程度上延长量子点层的使用寿命，提高显示品质。
附图说明
图1为本发明背光模组的结构示意图；
图2为图1中的石墨片的结构示意图；
图3为图1中的量子点层的结构示意图；
图4为图1的导光板结构示意图；
图5为本发明的背光模组仰视图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明提供了一种背光模组及液晶显示装置。图1至图5示出了本发明背光模组的一实施例。
如图1所示，为本实施例的背光模组的结构示意图，可包括LED组件1、量子点层2、石墨片3、反射片4、导光板5等，其中，所述量子点层2设置在所述导光板5与所述LED组件1之间，所述量子点层2设置在所述石墨片3上。
本实施例中，如图1至4所示，所述量子点层2卡合设置在所述石墨片3上，具体地，所述量子点层2与所述石墨片3接触的一侧设置有若干第一凸起7，所述石墨片3上开设有与所述第一凸起7适配，以供所述第一凸起7插入的第一孔6，所述量子点层2的第一凸起7插入所述石墨片3的第一孔6，实现二者的固定；此外，所述量子点层2也可以粘合在所述石墨片3上。此外，还可选择其他方式将所述量子点层2设置在所述石墨片上，此处对此不作限制。此外，对于所述第一凸起7的数量，其可设置为2个、4个、6个或者更多，此处对此不作限制，作为优选，所述第一凸起7的数量为两个，均匀分布在所述量子点层2的底面上。对应所述第一凸起7的形状，可以为柱形、锥形或者其他形状，还可以是上述形状的组合，此处对此不作限制，优选地所述第一凸起7的形状为柱形。所述第一孔6的形状与所述第一凸起7的形状适配，此处对此不作赘述。
由于所述石墨片3具有散热功能，直接将量子点层2设置在石墨片3上可有效地对所述量子点层2进行散热，防止所述量子点层2失效，延长量子点层的使用寿命，在一定程度上提高显示效果。
本实施例中，优选地，所述量子点层2贴合所述导光板5的入光面设置。
本实施例中，所述LED组件1为LED灯条，所述LED灯条粘合在所述石墨片3上，所述LED灯条包括若干LED及FPC(图中未示)，所述若干LED灯设置在所述FPC上，所述FPC粘合在所述石墨片上。由于石墨片具有散热功能，直接将所述LED组件1设置在石墨片3上可有效地对LED组件进行散热，延长LED组件的使用寿命。
作为另外一种变形，所述LED灯条可卡合在所述石墨片3上，优选地，所述LED灯条与所述石墨片3接触的一侧设置有两个以上第二凸起(图中未示)，所述石墨片3上对应位置设置有供所述第二凸起插入的第二孔(图中未示)，所述第二凸起与所述第二孔卡合，实现所述LED组件1与所述石墨片3之间的固定，所述两个以上第二凸起均匀设置在所述LED灯条上。此外，还可采用其他方式将LED组件1固定在所述石墨片3上，此处对此不作限制。需要说明的是，本实施例中，所述第二凸起可与所述第一凸起的结构一致，所述第二孔可与所述第一孔的形状一致。
本实施例中，所述反射片4贴合所述导光板5的底面设置，优选地，所述反射片4与所述石墨片3的厚度一致，且所述反射片4与所述石墨片3贴合对接设置，可以一定程度上减小背光模组的厚度。
本实施例中，优选地，所述导光板5在入光面处可形成一突出部501，所述突出部501的形状可与所述导光板5适配，优选地，所述突出部501的高度大于所述导光板5的高度，所述高度指的是导光板1或突出部501的底面到顶部的距离。进一步地，所述突出部朝向导光板的出光面形成一斜面，如图5所示。由于设置上述突出部501及形成一斜面结构，可以使得大部分光线都能从出光面出去，提高光线利用率，也减少光线从边缘出去的概率，一定程度上有利于防止边缘漏光现象。
需要说明的是，当导光板5没有设置所述突出部501时，所述量子点层2、LED组件1及所述导光板5的高度均一致；当所述导光板5设置所述突出部501时，所述量子点层2、LED组件1及所述突出部501的高度均一致，此处所述高度为处于同一水平面时，所述量子点层2、LED组件1、所述导光板5、所述突出部501的顶部到所述水平面的距离。
进一步地，所述导光板5可以为契形或平板型，此处对此不作限制。
本实施例中，由于在量子点层设置在石墨片上，可以对量子点层进行散热，防止量子点层由于温度过高而失效，一定程度上延长量子点层的使用寿命；此外，将LED组件设置在石墨片上，可对LED进行散热，无需再设置散热片，降低成本；再者，由于将石墨片与反射片贴合对接设置，二者的厚度一致，因此可一定程度上减小背光模组的厚度。
本发明还提供一种液晶显示装置，包括如上述实施例所述的背光模组，所述背光模组的结构及对应技术效果可参照上述实施例，此处不再赘述。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

1.一种背光模组，包括LED组件、导光板，其特征在于，还包括量子点层及石墨片，所述量子点层设置在所述LED组件与所述导光板之间，所述量子点层设置在所述石墨片上。
2.如权利要求1所述的背光模组，其特征在于，所述量子点层贴合所述导光板的入光面设置。
3.如权利要求1或2所述的支撑结构，其特征在于，所述量子点层与所述石墨片接触的一面设置有两个以上第一凸起，所述石墨片上开设有供所述凸起插入的第一孔，所述量子点层插设在所述石墨片上。
4.如权利要求1所述的背光模组，其特征在于，所述LED灯组为LED灯条，所述LED灯条粘贴在所述石墨片上。
5.如权利要求1所述的背光模组，其特征在于，所述LED灯组为LED灯条，所述LED灯条与所述石墨片接触的一侧设置有两个以上第二凸起，所述石墨片上设置有供所述第二凸起插入的第二孔。
6.如权利要求1所述的背光模组，其特征在于，还包括设置在所述导光板底面的反射片。
7.如权利要求6所述的背光模组，其特征在于，所述反射片与所述石墨片的厚度一致，所述石墨片与所述反射片贴合对接设置。
8.如权利要求1所述的背光模组，其特征在于，所述导光板在入光面处形成一突出部，所述突出部的高度大于导光板的高度，该突出部朝导光板的出光面形成一斜面。
9.如权利要求1或8所述的背光模组，其特征在于，所述导光板为平板或契形板。
10.一种液晶显示装置，其特征在于，包括如所述权利要求1至9任意一项所述的背光模组。
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