CN206610058U - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
CN206610058U
CN206610058U CN201720333055.3U CN201720333055U CN206610058U CN 206610058 U CN206610058 U CN 206610058U CN 201720333055 U CN201720333055 U CN 201720333055U CN 206610058 U CN206610058 U CN 206610058U
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heat pipe
led light
light bar
backboard
backlight module
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王征
陈秀云
王大可
梁菲
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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Priority to CN201720333055.3U priority Critical patent/CN206610058U/zh
Priority to US15/772,216 priority patent/US20190079348A1/en
Priority to PCT/CN2017/092354 priority patent/WO2018176679A1/zh
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/51Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133603Direct backlight with LEDs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00Lighting devices or systems using a string or strip of light sources
    • F21S4/20Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133628Illuminating devices with cooling means
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

本实用新型涉及显示技术领域,尤其涉及一种背光模组。本实用新型公开了一种背光模组,包括:背板;LED灯条,LED灯条沿背板的一边缘设置;多个热管,各热管与LED灯条同侧地设置于背板上;各热管的一端分别适于连接LED灯条,并且各热管的至少部分结构沿LED灯条处于工作状态时背板上热量的温度梯度方向布置。本实用新型的背光模组,使背光模组在进行散热时,整体温度分布均匀,不会出现局部过热的现象。

Description

背光模组
技术领域
本实用新型涉及显示技术领域,尤其涉及一种背光模组。
背景技术
目前,市场上的背光模组一般没有很好的散热结构,将柔性电路板贴在现有技术的背光模组上进行温度测试,其温度分布如图1所示,其中,图中的各等温线温度由靠近LED灯条的一侧到另一侧逐渐降低,相同等温线对应位置的温度相同。从图中可以看出模组设置LED灯条的一侧的中间部位的温度最高,远离LED灯条的一侧的温度最低,等温线曲线由LED灯条的中部到两侧呈椭圆形,即LED灯条的中部的温度向LED灯条两侧的温度逐渐降低。
从图1中看出,没有散热结构的背光模组容易导致热量无法快速疏散或者背光模组存在局部过热的现象,对采用此类背光模组液晶显示模组的构件会造成一定伤害,影响液晶显示模组的显示效果及寿命。
针对现有技术的背光模组在使用时,其整体结构上热量分布不均匀并且散热较慢的问题,需要提供一种具有与其热量分布相匹配的散热结构的背光模组。
实用新型内容
为解决上述问题,本实用新型提供一种背光模组,在背板上设置至少部分结构沿LED灯条处于工作状态时背板上热量的温度梯度方向布置,使背光模组在进行散热时,整体温度分布均匀,不会出现局部过热的现象。
为实现上述目的,本实用新型的一种背光模组,包括:
背板;
LED灯条,LED灯条沿背板的一边缘设置;
多个热管,各热管与LED灯条同侧地设置于背板上;
各热管的一端分别适于连接LED灯条,并且各热管的至少部分结构沿LED灯条处于工作状态时背板上热量的温度梯度方向布置。
进一步地,多个热管至少包括第一热管以及对称地设置于第一热管两侧的第二热管。
进一步地,第二热管与LED灯条连接的一端到另一端设有依次连接的水平部、弯曲部和延伸部,水平部沿LED灯条布置并使第二热管与LED灯条连接的一端靠近第一热管,弯曲部使延伸部沿温度梯度方向布置。
进一步地,延伸部的长度为背板在垂直于LED灯条方向上长度的一半,两第二热管的延伸部之间的最小距离为背板靠近且平行于LED灯条一边长度的五分之三。
进一步地,第一热管的长度为背板在垂直于LED灯条方向上长度的四分之三。
进一步地,各热管与LED灯条通过导热胶或者导热脂连接。
进一步地,背板上设有用于容纳热管的凹槽。
进一步地,凹槽的宽度比热管的直径大0.2mm-0.3mm。
进一步地,凹槽与热管的缝隙填充导热胶或者导热脂。
进一步地,还包括导热材料制成的固定件,热管和背板通过固定件固定连接。
进一步地,固定件与背板的表面平齐。
本实用新型的背光模组,在背板上与LED灯条同侧地设置多个热管, 将各热管布置为一端分别适于连接LED灯条,可以快速地将LED灯条处于工作状态时产生的热量分散到背板上,并且将热管的至少部分结构布置为沿LED灯条处于工作状态时背板的温度梯度方向布置,可以有效地降低热阻,使背光模组的热量从模组设置LED灯条的一侧传导到远离LED灯条的一侧,进而降低背光模组的整体温度,同时防止背光模组局部温度过热。
附图说明
图1为现有的背光模组处于工作状态时的温度模拟结果图;
图2为本实用新型的背光模组结构示意图;
图3为本实用新型的背光模组处于工作状态时的温度模拟结果图;
图4为本实用新型的一个实施例的背光模组组装结构的局部结构示意图;
图5为本实用新型的一个实施例的背光模组中背板与固定件的安装情况的局部结构示意图。
具体实施方式
下面,结合附图,对本实用新型的结构以及工作原理等作进一步的说明。
实施例一
如图2所示,本实用新型是一种基于热管技术进行散热的背光模组,热管技术是采用热管进行导热和散热。热管可以为中空的铜管,铜管内部为真空腔体,腔体内设有铜丝网编织成的毛细结构并且充有容易气液变化的介质,如水、乙醇等。当热管的一端靠近热源时,该端内的介质由于受热而发生相变,从液态变成气态,吸收大量的热,并且迅速移动到热管远离热源的一端,再从气态变成液态,释放大量热量,从而达到迅速导热的目的。
在本实施例中,背光模组包括背板1、LED灯条2和多个热管。LED灯条2沿背板1的一边缘设置,多个热管与LED灯条2同侧地设置于背板1上。各热管的一端分别适于连接LED灯条2,并且至少部分结构沿LED灯条2处于工作状态时背板1上热量的温度梯度方向布置。因此,可以有效地降低对LED灯条2产生的热量进行传递的热阻,提高LED灯条2的散热速度,将模组设置LED灯条2的一侧的热量迅速高效的传导到远离LED灯条2的一侧。并且,由于各热管至少部分结构沿LED灯条2处于工作状态时背板1上热量的温度梯度方向布置,因此,可以有效的降低热阻,并且改变模组的温度分布,降低模组的整体温度。
具体地,多个热管至少包括第一热管3以及对称地设置于第一热管3两侧的第二热管4。第二热管4由与LED灯条2连接的一端到另一端设有依次连接的水平部41、弯曲部42和延伸部43,水平部41沿LED灯条2布置并使第二热管4与LED灯条2连接的一端靠近第一热管3,弯曲部42使延伸部43沿温度梯度方向布置。其中,第二热管4与第一热管3相靠近的一端的对接处有缝隙,但应保证该缝隙尽量小,从而尽可能地使热管覆盖全部的LED灯条2,提高LED灯条2的散热速度。
为了得到更好的散热效果,延伸部43的长度可以为背板1在垂直于LED灯条2方向上长度的一半,两第二热管4的延伸部43之间的最小距离为背板1靠近且平行于LED灯条2一边长度的五分之三。第一热管3的长度为背板1在垂直于LED灯条2方向上长度的四分之三。需要说明的是,此处的垂直或者平行并非绝对的垂直或者平行,只要能够尽量趋近于垂直或者平行设置即可。
本实施例中,热管间的距离和角度通过采用Ansys等模拟软件进行温度模拟来确定,得到两第二热管4的延伸部43之间的距离范围在10~400mm之间,两第二热管4的延伸部43的倾斜角度与模组的尺寸有关,在不带有热管的情况下进行温度分布模拟,从而根据温度梯度的方向确定倾斜角度在0~90°之间。
当采用本实用新型实施例的背光模组进行温度模拟时,其温度分布如图3所示,其中,图3中的各等温线温度由靠近LED灯条的一侧到另一侧逐渐降低,相同等温线对应位置的温度相同。可以看出虽然本实用新型的背光模组的背板温度依然是靠近LED灯条的一侧的温度最高,远离LED灯条一侧的温度最低,但与现有技术中的背光模组相比整体温度降低了10℃,且温度分布发生明显变化,LED灯条的两端和中间部位的温度相差不大,说明本实用新型实施例中的多个热管作为传热通道,起到了疏散热量的作用,并且可以防止背光模组局部过热,起到了对液晶模组显示的保护作用。
实施例二
本实施例与实施例一的结构相似,原理相同,其区别仅在于:各热管与LED灯条2通过导热胶或者导热脂6紧密连接,可以使热量传导的效果更好,并且能隔绝空气,提高LED灯管2的散热速度。
实施例三
本实施例与实施例一、实施例二的结构相似,原理相同,其区别仅在于:如图4所示,背板1上还可以设置用于容纳热管的凹槽7,让背光模组的构件与热管更好地结合到一起,不但可以降低表面热阻,使热量通过热管传递,还可以消除热管的加入对背光模组画面品质的影响。其中,凹槽7的截面形状除了图中所示的矩形外,还可以是半圆形、三角形等其他形式,只要是能够容纳热管即可。
其中,凹槽的宽度比热管的直径大0.2mm-0.3mm,可以方便地将热管放入凹槽7内。凹槽7与热管的缝隙填充导热胶或者导热脂,不但起到了热量传导的作用,还能隔绝空气,提高散热速度。
为了能够更好地对热管和背板1进行固定,本实施例中还包括导热材料制成的固定件5,其中导热材料包括铜、陶瓷或者石墨,以及任何可以起到良好的导热效果的材料。热管和背板1通过固定件5固定连接,先将热管与固定件5焊接在一起,再将热管放入凹槽7内,并通过回流焊的方式固定背板1和固定件5。除了采用固定件5进行固定的方式外,还可以将热管直接焊接在背板1上,或者通过导热胶或导热脂直接与背板1固定。
本实施例中的固定件5的宽度可以大于热管的直径,并且在对固定件5和背板2进行固定时,直接将固定件5边缘与背板1进行焊接连接;固定件5的宽度还可以小于或者等于热管的直径,此时,需要在固定件5上设置多个焊接点,然后通过焊接点与背板1进行焊接连接。固定件5的尺寸和结构还可以进行其他相应变化,能够将热管与背板1进行固定即可。
同时,如图5所示,固定件5与背板1的表面平齐,防止组装过程中影响光学品位。
以上,仅为本实用新型的示意性描述,本领域技术人员应该知道,在不偏离本实用新型的工作原理的基础上,可以对本实用新型作出多种改进,这均属于本实用新型的保护范围。

Claims (11)

1.一种背光模组,包括:
背板(1);
LED灯条(2),所述LED灯条(2)沿所述背板(1)的一边缘设置;
多个热管,各所述热管与所述LED灯条(2)同侧地设置于所述背板(1)上;
其特征在于,各所述热管的一端分别适于连接所述LED灯条(2),并且各所述热管的至少部分结构沿所述LED灯条(2)处于工作状态时所述背板(1)上热量的温度梯度方向布置。
2.根据权利要求1所述的背光模组,其特征在于,所述多个热管至少包括第一热管(3)以及对称地设置于所述第一热管(3)两侧的第二热管(4)。
3.根据权利要求2所述的背光模组,其特征在于,所述第二热管(4)与所述LED灯条(2)连接的一端到另一端设有依次连接的水平部(41)、弯曲部(42)和延伸部(43),所述水平部(41)沿所述LED灯条(2)布置并使所述第二热管(4)与所述LED灯条(2)连接的一端靠近所述第一热管(3),所述弯曲部(42)使所述延伸部(43)沿所述温度梯度方向布置。
4.根据权利要求3所述的背光模组,其特征在于,所述延伸部(43)的长度为所述背板(1)在垂直于所述LED灯条(2)方向上长度的一半,两所述第二热管(4)的延伸部(43)之间的最小距离为所述背板(1)靠近且平行于所述LED灯条(2)一边长度的五分之三。
5.根据权利要求2-4中任一项所述的背光模组,其特征在于,所述第一热管(3)的长度为所述背板(1)在垂直于所述LED灯条(2)方向上长度的四分之三。
6.根据权利要求1所述的背光模组,其特征在于,各所述热管与所述LED灯条(2)通过导热胶或者导热脂(6)连接。
7.根据权利要求1所述的背光模组,其特征在于,所述背板(1)上设有用于容纳所述热管的凹槽(7)。
8.根据权利要求7所述的背光模组,其特征在于,所述凹槽(7)的宽度比所述热管的直径大0.2mm-0.3mm。
9.根据权利要求7所述的背光模组,其特征在于,所述凹槽(7)与所述热管的缝隙填充导热胶或者导热脂。
10.根据权利要求7所述的背光模组,其特征在于,还包括导热材料制成的固定件(5),所述热管和所述背板(1)通过所述固定件(5)固定连接。
11.根据权利要求10所述的背光模组,其特征在于,所述固定件(5)与所述背板(1)的表面平齐。
CN201720333055.3U 2017-03-31 2017-03-31 背光模组 Expired - Fee Related CN206610058U (zh)

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