CN202165940U - 液晶显示装置的背光模组及液晶显示装置 - Google Patents
液晶显示装置的背光模组及液晶显示装置 Download PDFInfo
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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Abstract
本实用新型公开一种液晶显示装置的背光模组及液晶显示装置,该背光模组包括LED及背板,其中,所述背光模组还包括设置在背板外的散热板,所述LED与所述散热板热传导连接。本实用新型由于将LED设置在另外加设的散热板上,且该散热板设置在背板外,使得LED所发出的热量经由散热板散发出去,背光腔中的温度得以降低,保护光学部件,同时因为不再使用背板直接散热,背板上的温度梯度也得到减小,即背光腔的温度梯度也能得到减小,减小背光腔因温度梯度导致的应力。
Description
技术领域
本实用新型涉及液晶面板领域,更具体的说,涉及一种液晶显示装置的背光模组以及使用了该背光模组的液晶显示装置。
背景技术
背光模组为液晶显示装置的关键组件之一,由于液晶面板本身不能发光,背光模组的功能在于提供充足的亮度及分布均匀的光源,使其能够正常的显示影像。
在目前的LED背光中,如图1所示,用于安装LED 3的PCB板2直接安装在背板5上,LED 3散发的热量经由背板5散发的空气中,同时由于背板5直接与导光板4等光学部材相接触,导致相当一部分的热量传导至背光腔的内部。光学部材长期置于较高的温度场中会加速部材老化、以及由热胀冷缩导致的应力,弯曲,公差的准确控制等问题。
实用新型内容
本实用新型所要解决的技术问题是提供一种可以降低背光腔温度且使其温度分布梯度更小的液晶显示装置的背光模组及使用了该背光模组的液晶显示装置。
本实用新型一种液晶显示装置的背光模组的目的是通过以下技术方案来实现的:一种液晶显示装置的背光模组,包括:LED和背板,其中所述背光模组还包括设置在背板外的散热板,所述LED与所述散热板热传导连接。
本实用新型一种液晶显示装置的目的是通过以下技术方案来实现的:一种液晶显示装置,包括液晶显示装置的背光模组,所述液晶显示装置的背光模组包括:LED和背板,其中所述背光模组还包括设置在背板外的散热板,所述LED与所述散热板热传导连接。
优选的,所述散热板与所述背板之间具有隔离层。隔离层使得散热板与背板间的热阻增大,减少散热板的热量传递到背板上。
优选的,所述隔离层为空气层。空气导热性差,有效的隔阻热量传递到背板上。
优选的,所述隔离层为设置在所述散热板与所述背板之间的保温材料。
所述保温材料选用材料热传导系数小于1W/mK的导热性较差的保温材料,导热性差的保温材料,能够更好的阻隔热量传递到背板上。
优选的,所述空气层的厚度在0.5mm~4mm。空气层的厚度较小,则热阻隔性效果不够好,较大则占用空间大,因而本实用新型优选在0.5mm~4mm范围。
优选的,所述保温材料为发泡塑料,发泡塑料为效果较佳且成本较低的保温材料。
优选的,所述背光模组还包括用于固定LED的传导板,所述LED通过传导板与散热板热传导连接,所述传导板与所述散热板为一板片折弯而成,所述的传导板与背板垂直设置,所述散热板与背板平行设置。由板片一体折弯而成的传导板与散热板的热传导效果好,传导板用于安装PCB板,散热板平行于背板散热,使其既能得到更大的散热面积,又能减小占用的空间。
优选的,所述背光模组包括有PCB电路板,所述LED直接设置在该PCB电路板上,所述的LED通过该PCB电路板设置在散热板上。LED设置在PCB电路板上,散热板对LED及PCB板同时散热,即节省空间,散热效果又好。
本实用新型由于将LED设置另外加设的散热板上,且该散热板设置在背板外,使得LED产生的热量通过散热板向外散热,减小背光腔内的温度,同时减小了背光腔了的温度分布梯度,有效的减少背光腔内的光学部件因温度梯度导致的应力,减少各部件的热胀冷缩。
附图说明
图1是现有技术的背光模组的截面图。
图2是本实用新型实施例的截面图。
图3是本实用新型实施例的结构示意图。
图4是本实用新型实施例的进行热像仪拍摄的散热器-背光结构的示意图。
图5是对如图4所示的散热器-背光结构从背面使用热像仪所拍摄的的温度分布图。
图6是对如图4所示的散热器-背光结构从正面使用热像仪所拍摄的的温度分布图。
其中:1、散热板,10、传导板,2、PCB板,3、LED,4、导光板,5、背板,6、隔离层。
具体实施方式
下面结合附图和较佳的实施例对本实用新型作进一步说明。
液晶显示装置的背光模组包括有导光板4、背板5及LED 3;其还包括设置在背板5外的散热板1,LED 3与所述散热板1热传导连接,如图2、图3中所示,LED 3通过PCB板2固定在一个另外设置在背板5外的散热板1上。
背光模组还可包括用于固定LED 3的传导板10,所述LED 3通过传导板10与散热板1热传导连接,传导板10与散热板1为一板片折弯而成,折弯后形成两互相垂直的部分,所述面积较小的传导板10与背板5垂直设置,用于安装PCB板2,散热板1与背板5平行设置,以避免占用较大空间,此部分面积可较大,以增大散热板1的散热面积,可使散热效率更高。
散热板1与背板5之间保持一定距离形成隔离层6,使得散热板1不与背板5接触,且散热板1的两面都与空气接触,有利于热量的散发,从而进一步降低LED 3的温度,延长LED 3的使用寿命。在散热板1与背板5之间的隔离层6内,可以填充导热性较差如材料热传导系数小于1W/mK的保温材料,如发泡塑料、橡胶等。由于空气、保温材料是热的不良导体,从而更为有效的避免LED 3产生的热量通过背板5直接传递到背光腔内。若隔离层6内不填充任何保温材料,则该空气隔离层最好保持一定的厚度,使其既不占用较大空间,又能达到有效的散热效果,优选的空气层的厚度范围为0.5mm~4mm,本实施例中即将空气层的厚度设为3mm左右。
图5是对如图4所示的散热器-背光结构从背面使用热像仪所拍摄的的温度分布图,可以看出,其高温部分主要集中于散热板1内,背板5和背光腔温度较低而且较均匀。图6是对如图4所示的散热器-背光结构从正面使用热像仪所拍摄的的温度分布图,可以看到,除了边框处的温度稍高之外,有效显示区内的温度变化较平缓,温差在10°以内,而且与实验时的室温24℃相差不多,这可以减少光学部材如导光板4的热胀冷缩效益,使预留的热膨胀空间减小,LED 3与导光板4之间的空隙可以控制的更加精确。
可以看出,上述方案可以有效的降低背光腔内的温度,同时也减小了背光腔中温度分布梯度,有效的减少背光腔内的光学部件因温度梯度导致的应力,减少各部件的热胀冷缩。此外,对散热板进行专门的散热设置使其散热能力提高,使得LED芯片的温度也能有效的降低,提高了LED的寿命。由于散热效果的提高,背光模组将能够使用更大功率的LED。
以上内容是结合具体的优选实施方式对本实用新型所作的进一步详细说明,不能认定本实用新型的具体实施只局限于这些说明。如,LED不必须通过PCB板及传导板与散热板连接,LED也可直接设置在传导板甚至直接设置在散热板上,只需满足其位置需求并与PCB板电连接即可。对于本实用新型所属技术领域的普通技术人员来说,在不脱离本实用新型构思的前提下,还可以做出若干简单推演或替换,都应当视为属于本实用新型的保护范围。
Claims (10)
1.一种液晶显示装置的背光模组,包括:LED和背板,其特征在于所述背光模组还包括设置在背板外的散热板,所述LED与所述散热板热传导连接。
2.如权利要求1所述的一种液晶显示装置的背光模组,其特征在于所述散热板与所述背板之间具有隔离层。
3.如权利要求2所述的一种液晶显示装置的背光模组,其特征在于所述隔离层为空气层。
4.如权利要求2所述的一种液晶显示装置的背光模组,其特征在于所述隔离层为设置在所述散热板与所述背板之间的保温材料。
5.如权利要求4所述的一种液晶显示装置的背光模组,其特征在于所述保温材料选用材料热传导系数小于1W/mK的保温材料。
6.如权利要求3所述的一种液晶显示装置的背光模组,其特征在于所述空气层的厚度在0.5mm~4mm。
7.如权利要求4所述的一种液晶显示装置的背光模组,其特征在于所述保温材料为发泡塑料。
8.如权利要求1所述的一种液晶显示装置的背光模组,其特征在于所述背光模组还包括用于固定LED的传导板,所述LED通过传导板与散热板热传导连接,所述传导板与所述散热板为一板片折弯而成,所述的传导板与背板垂直设置,所述散热板与背板平行设置。
9.如权利要求1所述的一种液晶显示装置的背光模组,其特征在于所述背光模组包括有PCB电路板,所述LED直接设置在该PCB电路板上,所述的LED通过该PCB电路板设置在散热板上。
10.一种使用了如权利要求1-9任一所述的背光模组的液晶显示装置,所述液晶显示装置的背光模组包括:LED和背板,其特征在于所述背光模组还包括设置在背板外的散热板,所述LED与所述散热板热传导连接。
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US13/380,871 US8770805B2 (en) | 2011-07-18 | 2011-12-03 | Backlight module for liquid crystal display and liquid crystal display |
PCT/CN2011/083417 WO2013010365A1 (zh) | 2011-07-18 | 2011-12-03 | 液晶显示装置的背光模组及液晶显示装置 |
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CN107219682A (zh) * | 2017-07-21 | 2017-09-29 | 微鲸科技有限公司 | 液晶显示屏和显示设备 |
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US8976527B2 (en) * | 2012-09-29 | 2015-03-10 | Apple Inc. | Force and heat spreading PCB for LCD protection and interconnection |
US9759851B2 (en) | 2015-04-01 | 2017-09-12 | Microsoft Technology Licensing, Llc | Thermal expansion compensated backlight illumination |
JP6774939B2 (ja) * | 2015-04-06 | 2020-10-28 | ソニー株式会社 | 照明装置および表示装置 |
CN207992647U (zh) * | 2018-03-29 | 2018-10-19 | 京东方科技集团股份有限公司 | 背光模组和显示装置 |
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JP2005134422A (ja) * | 2003-10-28 | 2005-05-26 | Advanced Display Inc | 液晶表示装置および電子機器 |
KR101259090B1 (ko) * | 2006-07-18 | 2013-04-26 | 삼성디스플레이 주식회사 | 몰드 프레임 및 이를 구비한 액정표시장치 |
JP4516582B2 (ja) * | 2007-05-15 | 2010-08-04 | 株式会社日立製作所 | 液晶表示装置 |
CN201069134Y (zh) * | 2007-06-26 | 2008-06-04 | 上海广电光电子有限公司 | Led背光模组 |
CN101676769B (zh) * | 2008-09-18 | 2011-12-21 | 株式会社日立制作所 | 液晶显示装置 |
TWI417605B (zh) * | 2008-10-06 | 2013-12-01 | Au Optronics Corp | 液晶顯示裝置 |
KR100933631B1 (ko) * | 2009-08-18 | 2009-12-23 | 삼성전자주식회사 | 백 라이트 어셈블리 및 이를 포함하는 액정표시장치 |
US8568012B2 (en) * | 2010-01-18 | 2013-10-29 | Lg Innotek Co., Ltd. | Lighting unit and display device having the same |
CN202074348U (zh) | 2011-05-16 | 2011-12-14 | 深圳市华星光电技术有限公司 | 液晶显示器及背光模组 |
-
2011
- 2011-07-18 CN CN2011202533638U patent/CN202165940U/zh not_active Expired - Lifetime
- 2011-12-03 WO PCT/CN2011/083417 patent/WO2013010365A1/zh active Application Filing
- 2011-12-03 US US13/380,871 patent/US8770805B2/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013155748A1 (zh) * | 2012-04-19 | 2013-10-24 | 深圳市华星光电技术有限公司 | 背光模组及液晶显示装置 |
CN107219682A (zh) * | 2017-07-21 | 2017-09-29 | 微鲸科技有限公司 | 液晶显示屏和显示设备 |
Also Published As
Publication number | Publication date |
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US8770805B2 (en) | 2014-07-08 |
US20130294052A1 (en) | 2013-11-07 |
WO2013010365A1 (zh) | 2013-01-24 |
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