CN103728771A - 液晶显示装置 - Google Patents
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Abstract
本发明提供一种液晶显示装置,具有:光源(223);光源电路基板(224),其用于载置光源、且对光源进行电控制;导光板光学***(210),其具有导光板,从光源发出的光从入射面入射到该导光板中并作为面状光而射出;以及框架(112),其保持导光板光学***及光源电路基板,在与入射面相对的面即光源配置面(115)的光源的配置位置处具有孔(113),光源电路基板以从光源配置面的背面侧将光源配置到孔的内部的方式设置在框架上。
Description
技术领域
本发明涉及液晶显示装置。
背景技术
作为计算机等信息通信终端或电视接收机的显示装置,广泛地使用液晶显示装置。液晶显示装置为如下装置:根据电场的变化来改变在两个基板之间封入的液晶组成物的取向,控制通过两个基板和液晶组成物的光的透射程度,由此显示图像。
在这样的液晶显示装置中,通常在光源中使用称作背光源的照明装置。作为背光源的照明方式,主要公知有在液晶显示面的背侧具有光源的直下光方式、和使从侧方照射来的光反射而照射液晶显示面的侧光方式。在近年来的用于手机等移动通信终端装置等的液晶显示装置中,由于谋求小型化和省电化,所以使用以发光二极管(LED:Light Emitting Diode)为光源的侧光方式。
在日本特开2008-216406号公报中,公开有在侧光方式的液晶显示装置中对由于LED的发光而产生的热进行散热的散热板。
发明内容
近年来,尤其在用于移动终端等的液晶显示装置中谋求进一步的小型化、薄型化,从而在使用了LED的侧光方式的液晶显示装置中,也需要减小形成在显示区域周围的边框区域。
本发明是鉴于上述情况而研发的,其目的在于提供一种进一步减小了边框区域的使用了侧光方式的背光源的液晶显示装置。
本发明的液晶显示装置的特征在于,具有:光源;光源电路基板,其用于载置上述光源、且对上述光源进行电控制;导光板光学***,其具有导光板,从上述光源发出的光从入射面入射到该导光板中并作为面状光而射出;以及框架,其保持上述导光板光学***及上述光源电路基板,在与上述入射面相对的面即光源配置面的上述光源的配置位置处具有孔,上述光源电路基板以从上述光源配置面的背面侧将上述光源配置到上述孔的内部的方式设置在上述框架上。
另外,在本发明的液晶显示装置中,也可以是,上述框架在上述光源配置面处的板厚根据上述光源相对于上述光源电路基板的高度而确定。
另外,在本发明的液晶显示装置中,也可以是,上述框架的上述孔为朝向上述导光板光学***扩展的锥形状。
另外,在本发明的液晶显示装置中,上述光源有多个,上述孔可以相对于各个光源而开设一个,上述孔也可以相对于多个光源而开设一个。
另外,在本发明的液晶显示装置中,也可以是,上述光源电路基板及上述框架双方的面直接或间接接触,来传导从上述光源产生的热,在间接接触的情况下,可以隔着含有玻璃填料的树脂而接触。
另外,在本发明的液晶显示装置中,也可以是,在上述框架的上述光源配置面上配置有反射片。
附图说明
图1是概略地表示本发明的实施方式的液晶显示装置的图。
图2是表示图1的下框架侧的一部分的截面的图。
图3是图1的下框架侧的一部分的立体图。
图4是表示与图3相同视野下的在下框架的光源配置面上开设的多个孔的图。
图5是表示图10所示的结构中的、LED所产生的热的传导情况的图。
图6是表示图2所示的结构中的、LED所产生的热的传导情况的图。
图7是表示本实施方式的第1变形例的图。
图8是表示本实施方式的第2变形例的图。
图9是表示本发明的比较例的液晶显示装置的背光源组件及框架的一部分的剖视立体图。
图10是表示图9的背光源组件及框架的从侧面切剖而成的截面的图。
具体实施方式
首先,说明本发明的比较例的构造。图9是表示本发明的比较例的使用了侧光式LED光源的液晶显示装置的背光源组件800及用于设置背光源组件800的框架912的一部分的剖视立体图。如该图所示,背光源组件800包括:由导光板、漫射片等光学片及反射片等构成的导光板光学***810;作为光源的LED(Light EmittingDiode)823;以及用于载置LED823、且控制LED823的发光的光源控制基板824。另外,导光板光学***810及光源控制基板824以使LED823所发出的光从导光板的侧面入射的方式设置在框架912上。
图10是表示图9的背光源组件800及框架912的从侧面切剖而成的截面的图。如该图所示,光源控制基板824在导光板光学***810的厚度方向上比导光板光学***810的厚度长,且载置有输入用于控制LED823的控制信号的连接器825等,因此,框架912呈向远离导光板光学***810的底面的方向大幅回绕而成的U字型的形状。另外,在本比较例中,在导光板光学***810的入光面与框架912之间配置光源控制基板824及LED823,因此,需要与光源控制基板824及LED823的厚度相应的边框区域。
以下,参照附图说明本发明的实施方式。此外,在附图中,对相同或同等的要素标注相同的附图标记,并省略重复的说明。
图1是概略地表示本发明的实施方式的液晶显示装置100的图。如该图所示,液晶显示装置100由以下部件构成:液晶组件200,其根据在两个基板之间封固的液晶的取向来控制从后述的导光板光学***210射出的光的透射;和框架110,其用于固定液晶组件200。在此,框架110具有显示面侧的上框架111和导光板光学***210侧的下框架112。此外,在本实施方式中,使上框架111及下框架112为分体部件,但也可以是一体地构成的框架。
图2是表示图1的下框架112侧的一部分的截面的图。如该图所示,导光板光学***210包括:导光板211;安装在导光板211的液晶面板侧的由棱镜片和/或漫射片构成的光学片212;以及安装在导光板211的与液晶面板侧相反侧的反射片213,导光板光学***210固定在下框架112上。通过使导光板光学***210成为这样的结构,能够使从导光板211的入光面215入射的光成为均匀的面状光而向液晶面板侧射出。
作为光源的LED223载置在光源控制基板224上,以配置在形成于下框架112的光源配置面115上的孔113内的方式,从光源配置面115的背面侧固定在下框架112上,其中,光源配置面115为与导光板211的入光面215相对的面。从LED223射出的光从导光板211的入光面215进入到导光板211内,在上下表面反复反射,并作为面状光而从导光板光学***210向液晶面板侧射出。在此,若从LED223射出的光在孔113的内壁面上发生反射,则可能会对面状出射光的均匀性产生影响,因此,将光源配置面115的板厚设计成不会使从LED223射出的光在孔113的内壁面上发生反射。即,光源配置面115的板厚根据LED223的高度或出射光的扩展角度而确定。
为了提高LED223所产生的热的散热性,光源控制基板224以与下框架112的面接触的方式固定。尤其在本实施方式中,将热传导性构件225夹在光源控制基板224与下框架112之间来提高热传导性。在此,热传导性构件能够是例如含有玻璃填料的树脂。而且,为了使从导光板211的入光面215射出的光返回到导光板211内,在光源配置面115上设置有反射片228。在光源控制基板224上,除LED223以外,还载置有包含连接器227在内的各种电子部件。
图3是包含图2的剖视图部分的导光板光学***210、下框架112及LED223的局部立体图。如该图所示,导光板光学***210配置在下框架112内,多个LED223分别配置于在光源配置面115上开设的多个孔113中。从各个LED223射出的光入射到图2所示的导光板211的入光面215上。
图4是表示与图3相同视野下的在下框架112的光源配置面115上开设的多个孔113的图。在本实施方式中,孔113仅开设与LED223的数量相同的个数。
因此,根据本实施方式的结构,在框架110与导光板光学***210之间不需要用于配置光源控制基板224及LED223的空隙,从而能够使框架110的侧面(光源配置面115)更接近导光板光学***210,因此,能够进一步减小边框区域。另外,由于无需使框架110为覆盖光源控制基板224那样的U字型的形状,所以能够更加薄型。
另外,在框架110中,由于减少了折曲数而使形状简化,所以能够控制包括模具费用等在内的加工费用,并且能够减少不合格加工品的产生数量而提高成品率。另外,作为光源的LED223能够不拆下框架而更换,因此,针对修理或制造时的不合格情况也能够更容易地应对。
图5是表示在图10所示的结构中LED823所产生的热的传导路径的图。如该图所示,LED823所产生的热经由光源控制基板824而传导至由热传导性好的金属构成的框架912,并沿着框架912向更远离LED823的方向传导,由此进行散热。此时,由于框架912呈U字型形状,所以热滞留在该形状的内部,在U字型形状部分处无法高效地进行散热。
图6是表示在本发明的图2所示的结构中LED223所产生的热的传导路径的图。如该图所示,LED223所产生的热与图5同样地传导至光源控制基板224,并且还直接传导至由金属形成的下框架112,因此,能够高效地对作为热源的LED223进行散热。而且,由于下框架112不为图5的U字型那样的形状而为仅折曲一次的形状,所以传导至下框架112的热能够传导到更远离LED223的位置而散热。因此,在本实施方式的结构中,能够将热从LED223向更多方向传导,并且也能够高效地对传导后的热进行散热。
因此,在本实施方式的液晶显示装置100中,从光源向更多方向散热,并且向散热效果好的金属的框架110直接散热,因此,能够高效地对光源所产生的热进行散热。而且,由于框架110的光源附近处的折曲数较少,所以不会将热滞留在光源附近而能够更高效地散热。通过像这样提高散热效率,能够抑制光源的劣化,因此能够进一步延长液晶显示装置的使用年限。
在图7中示出了上述实施方式的第1变形例。在该变形例中,框架312在光源配置面315上相对于两个LED323而具有一个孔313。此外,在本变形例中,对两个LED323使用了一个孔313,但也可以对三个以上的光源使用一个孔。与该一个孔对应的光源的数量可以根据光源的大小和/或框架312的厚度或强度等而确定,也可以根据光学设计方面的理由等其他理由而确定。
在图8中示出了上述实施方式的第2变形例。在图2中,光源配置面115的板厚根据LED223的高度或出射光的扩展角度而确定,但如图8所示,第2变形例的孔413为朝向导光板光学***210扩展的锥形状。通过使孔413为这样的形状,尤其在使用薄型的作为光源的LED423的情况下,能够在维持框架412的板厚而保持强度的同时,防止从LED423射出的光在孔413的内壁面上的反射。
在上述实施方式中,框架使用分离成上框架和下框架的部件,但即使是将上框架和下框架一体化来保持液晶面板和背光源组件双方,也能够通过设置成从框架的光源配置面的背面侧将光源配置到孔的内部而适用本发明。另外,在上述实施方式中,使光源为LED,但也可以使用其他自发光型的发光元件。
以上说明了当前阶段考虑到的本发明的优选实施方式,但需要理解的是能够对本实施方式进行多种变形,而且,意图将在本发明的真实精神和范围内的所有变形包括在附加的权利要求书中。
Claims (8)
1.一种液晶显示装置,其特征在于,具有:
光源;
光源电路基板,其用于载置所述光源、且对所述光源进行电控制;
导光板光学***,其具有导光板,从所述光源发出的光从入射面入射到该导光板中并作为面状光而射出;以及
框架,其保持所述导光板光学***及所述光源电路基板,在与所述入射面相对的面即光源配置面的所述光源的配置位置处具有孔,
所述光源电路基板以从所述光源配置面的背面侧将所述光源配置到所述孔的内部的方式设置在所述框架上。
2.如权利要求1所述的液晶显示装置,其特征在于,所述框架在所述光源配置面处的板厚根据所述光源相对于所述光源电路基板的高度而确定。
3.如权利要求1所述的液晶显示装置,其特征在于,所述框架的所述孔为朝向所述导光板光学***扩展的锥形状。
4.如权利要求1所述的液晶显示装置,其特征在于,所述光源有多个,所述孔相对于各个光源而开设一个。
5.如权利要求1所述的液晶显示装置,其特征在于,所述光源有多个,所述孔相对于多个光源而开设一个。
6.如权利要求1所述的液晶显示装置,其特征在于,所述光源电路基板及所述框架双方的面直接或间接接触,来传导从所述光源产生的热。
7.如权利要求6所述的液晶显示装置,其特征在于,所述光源电路基板及所述框架隔着含有玻璃填料的树脂而接触。
8.如权利要求1所述的液晶显示装置,其特征在于,在所述框架的所述光源配置面上配置有反射片。
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KR102276337B1 (ko) | 2014-12-16 | 2021-07-13 | 삼성디스플레이 주식회사 | 백라이트 유닛 및 이를 포함하는 액정 표시 장치 |
CN105180100B (zh) * | 2015-10-23 | 2018-09-04 | 京东方光科技有限公司 | 胶框组件、背光源和显示装置 |
KR102490436B1 (ko) * | 2018-01-09 | 2023-01-19 | 삼성전자주식회사 | 백라이트 유닛 및 이를 구비한 디스플레이 장치 |
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US9250471B2 (en) | 2016-02-02 |
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CN103728771B (zh) | 2016-09-07 |
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US20140098322A1 (en) | 2014-04-10 |
KR101513360B1 (ko) | 2015-04-17 |
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KR20140046377A (ko) | 2014-04-18 |
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