CN108693671A - 背光模组、液晶显示器 - Google Patents

背光模组、液晶显示器 Download PDF

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CN108693671A
CN108693671A CN201810542945.4A CN201810542945A CN108693671A CN 108693671 A CN108693671 A CN 108693671A CN 201810542945 A CN201810542945 A CN 201810542945A CN 108693671 A CN108693671 A CN 108693671A
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backlight module
backboard
light source
hollow cavity
source region
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李德华
俞刚
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Huizhou China Star Optoelectronics Technology Co Ltd
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Huizhou China Star Optoelectronics Technology Co Ltd
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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
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    • G—PHYSICS
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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
    • G02B6/0033—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
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    • 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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    • G02F1/13—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
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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
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    • 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
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
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    • G02F1/133314—Back frames
    • G—PHYSICS
    • G02—OPTICS
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    • 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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    • G02F1/133628—Illuminating devices with cooling means

Abstract

本发明公开了一种背光模组及液晶显示器。该背光模组包括：热沉，包括底板和由所述底板的一端弯折形成的侧板；背板，设置于所述底板上，所述背板具有中空腔体，所述中空腔体中填充有液体；导光板，设置于所述背板的第一表面上；光源，安装于所述侧板上且面向所述导光板的入光面。该液晶显示器包括前框、显示面板和任一种上述的背光模组，所述显示面板设置于所述背光模组上，所述前框罩设于所述显示面板上本发明公开的一种背光模组，通过背板内部开设中空腔体，并且在中空腔体内填充液体，通过液体的传热性将光源产生热量传导至整个背板，以提高背光模组的散热能力。

Description

背光模组、液晶显示器
技术领域
本发明涉及显示技术领域，具体地说，涉及一种背光模组和液晶显示器。
背景技术
液晶显示装置具有低辐射、低功耗、厚度薄和重量轻等特点，其已经成为显示市场的主流。目前采用侧边式LED背光模组的液晶显示装置给用户带来了超薄体验，同时也符合节能环保的发展趋势。然而，侧边式LED背光模组由于光源的发光区域比较集中，造成背光模组局部区域的温度较高，尤其是LED发光区域的温度较高。一方面，会造成LED的使用寿命，另一方面整个背光模组不同区域的温度分布差异较大，影响了液晶面板的正常工作。
目前背光模组中的散热方案一般采用传统的被动式散热，而采用风冷则有引起进灰、噪声的风险。目前电视发展趋势，背光功率要求越来越高，光源产生的热量也越来越多，如何提高背光模组的散热能力也是本行业中急需解决的问题。
发明内容
本发明所要解决的技术问题在于克服现有技术的不足，提供一种可提高背板的散热能力的的背光模组及液晶显示器。
为了实现上述的目的，本发明采用了如下的技术方案：
一种背光模组，包括：
热沉，包括底板和由所述底板的一端弯折形成的侧板；
背板，设置于所述底板上，所述背板内部开设有中空腔体，所述中空腔体中填充有液体；
导光板，设置于所述背板的第一表面上；
光源，安装于所述侧板上且面向所述导光板的入光面。
优选地，所述背光模组还包括液体运输装置，所述液体运输装置与所述中空腔体连通，所述中空腔体包括靠近所述光源的近光源区和远离所述光源的远光源区，所述液体运输装置用于循环运输冷却液体，以使得冷却液体在所述中空腔体的所述近光源区和所述远光源区之间循环流动。
优选地，所述液体运输装置包括泵以及分别与所述泵连接的第一运输管和第二运输管，所述背板的与所述第一表面相对的第二表面上开设有第一通孔和第二通孔，所述第一通孔与所述近光源区连通，所述第二通孔与所述远光源区连通，第一运输管与所述第一通孔连通，所述第二运输管与所述第二通孔连通。
优选地，所述背板为玻璃背板。
或者，所述背板为金属背板。
优选地，所述光源包括LED灯条和灯条安装部，所述LED灯条设置于所述灯条安装部上，所述灯条安装部设置于所述侧板上。
优选地，所述背光模组还包括反射片，所述反射片设置于所述导光板和所述背板之间。
优选地，所述背光模组还包括光学膜片和中框，所述光学膜片设置于所述导光板上，所述中框罩设于所述光学膜片上。
优选地，所述冷却液体为水。
本发明还公开了一种液晶显示器，包括前框、显示面板和任一种上述的背光模组，所述显示面板设置于所述背光模组上，所述前框罩设于所述显示面板上。
本发明的有益效果：本发明公开的一种背光模组，通过背板内部开设中空腔体，并且在中空腔体内填充冷却液体，通过液体的传热性将光源产生热量传导至整个背板，以提高背光模组的散热能力。
附图说明
图1为本发明的实施例一的背光模组的剖面图；
图2为本发明的实施例二的液晶显示器的剖面图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进一步详细说明。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。
实施例一
如图1所示，根据本发明的实施例的背光模组包括热沉10、背板20、导光板30和光源40。其中，热沉10包括底板11和有底板11的一端弯折形成的侧板12，且侧板12与底板11相互垂直。背板20具有中空腔体21，中空腔体21中填充有冷却液体50，导光板30设置于背板20的第一表面20a上，光源40安装于侧板12上，且光源40位于导光板30的入光侧31，光源40产生的热量通过热沉10传送到背板20的近光源端，再通过冷却液体50将热量扩散至整个背板20，以起到散热作用。
进一步地，背光模组还包括液体运输装置60，液体运输装置60与中空腔体21连通，中空腔体21包括靠近光源40的近光源区21a和远离光源40的远光源区21b。液体运输装置60用于循环运输冷却液体50，以使得冷却液体50在中空腔体的近光源区21a和远光源区21b之间循环流动，这样，通过冷却液体50的循环流动，使得光源40的产生的热量更快速地扩散至整个背板20，以进一步地提高背光模组的散热能力。
作为优选实施例，液体运输装置60包括泵61以及分别与泵61连接的第一运输管62和第二运输管63。背板20的与第一表面20a相对的第二表面20b上开设有第一通孔22和第二通孔23，第一通孔22与近光源区21a连通，第二通孔23与远光源区21b连通，第一运输管61与第一通孔22连通，第二运输管63与第二通孔23连通，这样使得近光源区21a内的高温液体运输至远光源区21b内，且远光源区21b内的低温液体流动至近光源区21a内，加快背板20的散热速度。
进一步地，作为优选实施例，如图1所示，近光源区21a指的是中空腔体21的中心线至中空腔体21的靠近光源40的第一侧之间的区域，远光源区21b指的是中空腔体21的中心线至中空腔体21的远离光源40的第二侧之间的区域。
当然在其他实施方式中，液体运输装置60的数量可以为多个，背板20上开设有多个第一通孔22和多个第二通孔23，多个第一通孔22与近光源区21a连通，多个第二通孔23与远光源区21b连通，每个液体运输装置60的第一运输管62和第二运输管63分别与一对第一通孔22和第二通孔23连通，以提高冷却液体50的循环流动性。
进一步地，背光模组还包括驱动装置，驱动装置用于检测光源40的工作状态以及用于控制泵61的开启和关闭。当驱动装置检测到光源40开启时，驱动装置开启泵61，使得冷却液体50在中空腔体21内循环流动；当驱动装置检测到光源40关闭时，驱动装置关闭泵61，以节省电能。
具体地，为了提高背光模组的散热能力，背板20优选为金属背板，例如铝制背板，这类背板具有良好的导热性。进一步地，热沉10的材料优选为铝。当然在其他实施方式中，背板20还可以为玻璃背板。冷却液体50采用流动性较好且导热能力较强的液体，例如水。当然在其他实施方式中，冷却液体50可以为冷却油。
进一步地，背光模组还包括反射片70、光学膜片80和中框90，反射片70设置于导光板30和背板20之间，光学膜片80设置于导光板30上，中框90罩设置于光学膜片80上。光源40包括LED灯条41和灯条安装部42，LED灯条41设置于灯条安装部42上，灯条安装部42设置于侧板12上。
本发明公开的一种背光模组，通过背板内部开设中空腔体，并且在中空腔体内填充液体，通过液体的传热性将光源产生热量传导至整个背板，以提高背光模组的散热能力。
实施例二
如图2所示，根据本发明的实施例的液晶显示器包括前框200、显示面板300和实施例一中的背光模组100，显示面板300设置于背光模组100上，前框200罩设于显示面板300上。通过采用具有良好散热能力的背光模组，可以提高液晶显示器的散热能力，从而提高液晶显示器的性能。
上面对本发明的具体实施方式进行了详细描述，虽然已表示和描述了一些实施例，但本领域技术人员应该理解，在不脱离由权利要求及其等同物限定其范围的本发明的原理和精神的情况下，可以对这些实施例进行修改和完善，这些修改和完善也应在本发明的保护范围内。

Claims (10)

1.一种背光模组，其特征在于，包括：
热沉(10)，包括底板(11)和由所述底板(11)的一端弯折形成的侧板(12)；
背板(20)，设置于所述底板(11)上，所述背板(20)具有中空腔体(21)，所述中空腔体(21)中填充有冷却液体(50)；
导光板(30)，设置于所述背板(20)的第一表面(20a)上；
光源(40)，安装于所述侧板(12)上且面向所述导光板(30)的入光面。
2.根据权利要求1所述的背光模组，其特征在于，所述背光模组还包括：液体运输装置(60)，所述液体运输装置(60)与所述中空腔体(21)连通，所述中空腔体(21)包括靠近所述光源(40)的近光源区(21a)和远离所述光源(40)的远光源区(21b)，所述液体运输装置(60)用于循环运输冷却液体(50)，以使冷却液体(50)在所述近光源区(21a)和所述远光源区(21b)之间循环流动。
3.根据权利要求2所述的背光模组，其特征在于，所述液体运输装置(60)包括泵(61)以及分别与所述泵(61)连接的第一运输管(62)和第二运输管(63)，所述背板(20)的与所述第一表面(20a)相对的第二表面(20b)上开设有第一通孔(22)和第二通孔(23)，所述第一通孔(22)与所述近光源区(21a)连通，所述第二通孔(23)与所述远光源区(21b)连通，所述第一运输管(62)与所述第一通孔(22)连通，所述第二运输管(63)与所述第二通孔(23)连通。
4.根据权利要求1所述的背光模组，其特征在于，所述背板(20)为玻璃背板。
5.根据权利要求1所述的背光模组，其特征在于，所述背板(20)为金属背板。
6.根据权利要求1所述的背光模组，其特征在于，所述光源(40)包括LED灯条(41)和灯条安装部(42)，所述LED灯条(41)设置于所述灯条安装部(42)上，所述灯条安装部(42)设置于所述侧板(12)上。
7.根据权利要求1所述的背光模组，其特征在于，所述背光模组还包括反射片(70)，所述反射片(70)设置于所述导光板(30)和所述背板(20)之间。
8.根据权利要求1所述的背光模组，其特征在于，所述背光模组还包括光学膜片(80)和中框(90)，所述光学膜片(80)设置于所述导光板(30)上，所述中框(90)罩设于所述光学膜片(80)上。
9.根据权利要求1所述的背光模组，其特征在于，所述冷却液体(50)为水。
10.一种液晶显示器，其特征在于，包括前框(200)、显示面板(300)和权利要求1至9任一项所述的背光模组(100)，所述显示面板(300)设置于所述背光模组(100)上，所述前框(200)罩设于所述显示面板(300)上。
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