CN107027271B - 液晶电视用散热系统及液晶电视 - Google Patents
液晶电视用散热系统及液晶电视 Download PDFInfo
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Abstract
本发明提供一种液晶电视用散热系统及液晶电视。该液晶电视用散热系统通过在散热型材(1)上粘结高导热的均温板(4),搭配散热鳍片(5)和风扇(6),并以均温板(4)作为整个散热系统的核心导热媒介,能够大幅减小温度梯度,快速、大量、高效地导出LED灯条(2)的发热量,防止LED灯条(2)因温度过高而烧毁或者使用寿命急剧缩短;另外,由于设置了均温板(4),可以将散热型材(1)的尺寸减小,从而有利于液晶电视的薄型化。
Description
技术领域
本发明涉及液晶显示器技术领域,尤其涉及一种液晶电视用散热系统及液晶电视。
背景技术
液晶显示器(Liquid Crystal Display,LCD)具有机身薄、省电、无辐射等众多优点,得到了广泛地应用,如:液晶电视、智能手机、计算机屏幕或笔记本电脑屏幕等。
现有市场上的液晶显示器大部分为背光型液晶显示器,其包括壳体、设于壳体内的液晶面板及设于壳体内的背光模组(Backlight Module)。
液晶面板本身并不发光,需要借由背光模组提供的光源来正常显示影像。背光模组依照光源入射位置的不同分成侧入式背光模组与直下式背光模组两种。直下式背光模组是将发光光源例如阴极荧光灯管(Cold Cathode Fluorescent Lamp,CCFL)或发光二极管(Light Emitting Diode,LED)设置在液晶面板后方,直接形成面光源提供给液晶面板;而侧入式背光模组是将背光源LED灯条(Light bar)设于液晶面板侧后方的背板边缘处,LED灯条发出的光线从导光板(Light Guide Plate,LGP)一侧的入光面进入导光板,经反射和扩散后从导光板出光面射出,再经由光学膜片组,以形成面光源提供给液晶面板。
目前,液晶电视一般采用侧入式的入光方式,以满足厚度超薄的要求。侧入式入光方式带来的一大问题就是LED灯条上的LED灯珠密度极大,进而导致入光侧温度过高,特别是现在的液晶电视开始向高亮度、高画质的方向发展,进一步加剧了入光侧温度问题的严重性。
现有的液晶电视一般采用铝挤来作为散热部件,依靠铝挤以自然对流方式进行散热,其传热路径为LED到铝挤再到空气。虽然铝挤的结构简单,但自然对流的散热能力有限,已经无法满足新型液晶电视的散热要求了。若为了增加散热效果而采取直接加大铝挤面积的做法,一方面会增大液晶电视下半部分的厚度,另一方面更大的铝挤意味着温度梯度更大,即铝挤在靠近LED灯条的下半部的温度很高,越往上温度越低,也就是说单纯依靠增加铝挤面积所产生的散热作用非常有限。
因此,需要设计一种新的、与目前的液晶电视架构相适应的散热系统。
发明内容
本发明的目的在于提供一种液晶电视用散热系统,能够对LED灯条的发热量进行快速、高效地散热,并有利于液晶电视的薄型化。
本发明的另一目的在于提供一种液晶电视,其散热系统的散热效率高,散热效果好。
为实现上述目的,本发明首先提供一种液晶电视用散热系统,包括散热型材、粘结在所述散热型材水平底面上的LED灯条、设在所述LED灯条与散热型材内直立面之间供散热型材进行锁附的背板、粘结在所述散热型材外直立面上的均温板、锁附在所述均温板远离散热型材一侧的散热鳍片、及锁附在所述散热鳍片远离均温板一侧的多个风扇。
所述散热型材为铝挤、或铜型材。
所述均温板为内部中空的薄板。
所述均温板的内部抽真空。
所述均温板的内部具有微小网状结构、或多微孔结构。
所述均温板的内部填充冷媒。
所述冷媒为酒精或纯净水。
所述均温板的材料为铜。
所述均温板朝向背板的投影面积大于散热型材朝向背板的投影面积,所述均温板的高度大于散热型材的高度。
本发明还提供一种液晶电视,包括上述液晶电视用散热系统。
本发明的有益效果:本发明提供的一种液晶电视用散热系统,通过在散热型材上粘结高导热的均温板搭配散热鳍片和风扇,并以均温板作为整个散热系统的核心导热媒介,能够大幅减小温度梯度,快速、大量、高效地导出LED灯条的发热量,防止LED灯条因温度过高而烧毁或者使用寿命急剧缩短;另外,由于设置了均温板,可以将散热型材的尺寸减小,从而有利于液晶电视的薄型化。本发明提供的一种液晶电视,采用上述液晶电视用散热系统,散热效率高,散热效果好。
附图说明
为了能更进一步了解本发明的特征以及技术内容,请参阅以下有关本发明的详细说明与附图,然而附图仅提供参考与说明用,并非用来对本发明加以限制。
附图中,
图1为本发明的液晶电视用散热系统的后视示意图;
图2为本发明的液晶电视用散热系统的侧视示意图;
图3为本发明的液晶电视用散热系统的局部立体示意图;
图4为本发明的液晶电视用散热系统中均温板的剖面示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果,以下结合本发明的优选实施例及其附图进行详细描述。
请同时参阅图1至图3,本发明提供一种液晶电视用散热系统,包括散热型材1、LED灯条2、背板3、均温板4、散热鳍片5、及多个风扇6。
所述散热型材1的端面呈“L”形,所述LED灯条2粘结在该散热型材1的水平底面上作为液晶电视的光源。将散热型材1相对靠近LED灯条2的直立面定义为内直立面,相对远离LED灯条2的直立面定义为外直立面,在所述LED灯条2与散热型材1内直立面之间设有背板3;所述散热型材1锁附在背板3上。所述均温板4粘结在所述散热型材1外直立面上。所述散热鳍片5锁附在所述均温板4远离散热型材1的一侧。所述多个风扇6锁附在散热鳍片5远离均温板4的一侧。
具体地,所述散热型材1可为传统的铝挤,也可以用导热性能更佳的“L”形的铜型材来代替铝挤。
所述均温板4选用具有优良导热性能的材料,如铜,进行制作。请参阅图4,所述均温板4为内部中空的薄板,该内部中空的部分抽真空并填充酒精或纯净水等冷媒。进一步地,所述均温板4的内部具有微小网状结构,即如图4所示均温板4的内部包括数层由微小的铜丝纵横交织而成的铜网,能够大幅增加散热面积;所述均温板4的内部还可为多微孔结构,即均温板4的内部包括数量庞多的微孔,同样能够达到增加散热面积的目的。所述均温板4的工作原理类似于热管,但二者在传热方式上有所区别:热管为一维线性热传导,而均温板4则是在一个二维的面上做热传导,因此传热效率更高。
本发明的液晶电视用散热系统的工作过程为:
当液晶电视启动后,高功率的LED灯条2开始发光并产生大量热量,热量通过传导作用先转移到散热型材1上;
接着这些热量再被传导到均温板4,均温板4的吸热端即均温板4与散热型材1外直立面接触的部分受热,均温板4内部的微小网状结构或多微孔结构迅速吸热,冷媒在真空超低压环境下迅速受热蒸发,然后蒸汽态冷媒转移到均温板4的冷端即均温板4与散热鳍片5接触的部分重新凝结为液态冷媒,之后液态冷媒在均温板4内部的微小网状结构或多微孔结构的毛细作用下重新流到吸热端形成循环,这一冷媒的蒸发、冷凝过程由于真空超低压的环境和均温板4内部微小网状结构或多微孔结构的超大换热面积可以实现相当高效率的导热、散热效果,且所述均温板4朝向背板3的投影面积大于散热型材1朝向背板3的投影面积,所述均温板4的高度大于散热型材1的高度,均温板4的设置能够将LED灯条2发光产生的绝大部分热量吸收,相比传统的铝挤可以大幅减小温度梯度,提高散热效率;
接下来,均温板4将其吸收的热量转移至散热鳍片5上;
最后,所述多个风扇6通过强制风冷的方式将热量转移至空气中,最终实现快速、大量、高效地导出LED灯条2的发热量,防止LED灯条2因温度过高而烧毁或者使用寿命急剧缩短。
另外,本发明以均温板4作为整个散热系统的核心导热媒介,均温板4具有相当高的导热、散热效率,因此可以将散热型材1的尺寸减小,从而有利于液晶电视的薄型化。
基于同一发明构思,本发明还提供一种液晶电视,包括上述的液晶电视用散热系统,散热效率高,散热效果好,此处不再重复描述液晶电视用散热系统的结构及工作过程。
综上所述,本发明的液晶电视用散热系统,通过在散热型材上粘结高导热的均温板搭配散热鳍片和风扇,并以均温板作为整个散热系统的核心导热媒介,能够大幅减小温度梯度,快速、大量、高效地导出LED灯条的发热量,防止LED灯条因温度过高而烧毁或者使用寿命急剧缩短;另外,由于设置了均温板,可以将散热型材的尺寸减小,从而有利于液晶电视的薄型化。本发明的液晶电视,采用上述液晶电视用散热系统,散热效率高,散热效果好。
以上所述,对于本领域的普通技术人员来说,可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形,而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。
Claims (9)
1.一种液晶电视用散热系统,其特征在于,包括散热型材(1)、粘结在所述散热型材(1)水平底面上的LED灯条(2)、设在所述LED灯条(2)与散热型材(1)内直立面之间供散热型材(1)进行锁附的背板(3)、粘结在所述散热型材(1)外直立面上的均温板(4)、锁附在所述均温板(4)远离散热型材(1)一侧的散热鳍片(5)、及锁附在所述散热鳍片(5)远离均温板(4)一侧的多个风扇(6);
所述均温板(4)为内部中空的薄板。
2.如权利要求1所述的液晶电视用散热系统,其特征在于,所述散热型材(1)为铝挤、或铜型材。
3.如权利要求1所述的液晶电视用散热系统,其特征在于,所述均温板(4)的内部抽真空。
4.如权利要求3所述的液晶电视用散热系统,其特征在于,所述均温板(4)的内部具有微小网状结构、或多微孔结构。
5.如权利要求4所述的液晶电视用散热系统,其特征在于,所述均温板(4)的内部填充冷媒。
6.如权利要求5所述的液晶电视用散热系统,其特征在于,所述冷媒为酒精或纯净水。
7.如权利要求1所述的液晶电视用散热系统,其特征在于,所述均温板(4)的材料为铜。
8.如权利要求1所述的液晶电视用散热系统,其特征在于,所述均温板(4)朝向背板(3)的投影面积大于散热型材(1)朝向背板(3)的投影面积,所述均温板(4)的高度大于散热型材(1)的高度。
9.一种液晶电视,其特征在于,包括如权利要求1~8任一项所述的液晶电视用散热系统。
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PCT/CN2017/088192 WO2018196120A1 (zh) | 2017-04-28 | 2017-06-14 | 液晶电视用散热系统及液晶电视 |
KR1020197035292A KR102263473B1 (ko) | 2017-04-28 | 2017-06-14 | 액정 텔레비전용 방열 시스템 및 액정 텔레비전 |
JP2019558364A JP6844032B2 (ja) | 2017-04-28 | 2017-06-14 | 液晶テレビ用放熱システム及び液晶テレビ |
US15/539,699 US10477735B2 (en) | 2017-04-28 | 2017-06-14 | Heat dissipation system for use with liquid crystal television and liquid crystal television |
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