CN103486495A - 高对比的直下式背光模块 - Google Patents
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Abstract
本发明是有关于一种高对比的直下式背光模块,供以结合于一显示模块,所述直下式背光模块具有多个LED光源及一扩散板,所述多个LED光源是成矩阵式排列,且其所射出的光于所述扩散板上分别成形为一椭圆形光形后,经所述扩散板传送至所述显示模块。如此,通过矩阵式排列的所述多个椭圆形光形可增加所述直下式背光模块的明暗对比度,使优化所述显示模块的解析度,提升显示画面的色彩丰富度及锐利度。
Description
技术领域
本发明是属于液晶显示器用的背光模块的技术领域,特别是关于一种高对比的直下式背光模块,以于应用时提升液晶显示器的色彩饱合及明暗对比,使丰富画面呈现效果。
背景技术
由于液晶显示器是一种不具有自发光功能的被动式显示装置,故需加装背光模块以提供显示面板所需的显示光源,如此,背光模块产生的面光源是否具足够且均匀的亮度即直接影响液晶显示器的显示品质。目前,背光模块依其结构可分为侧光式及直下式(Direct Type Backlight)两种,其中,直下式背光模块因具有高光照均匀度、良好的出光视角、高光能利用率、简易的组装结构,及可快速微调画面区域明暗以大幅提升动态对比度等特点而广泛应用于大尺寸液晶显示器中。
又,LED具有发光效率高、寿命长及耗电量低等特性而成为背光模块的应用光源首选,如此,现有直下式背光模块是通过矩阵排列的方式将多个LED光源装设于一基板上,并以一适当距离将一扩散板(Diffusion Plate)覆盖于所述多个LED光源上,供以均匀分散各所述LED光源所发射光的光径,即混光后投射至显示面板上,以提供亮度均匀的面光源。然而,如图1所示,其为现有直下式背光模块于扩散板上的投射光形示意图,所述多个LED光源于所述扩散板上是分别成形为圆形光形1,以通过相互邻接的光照区域而获得全屏均匀的光照强度。值得注意的是,所述多个圆形光形1间的邻接处是形成有相互交集的亮部10及无光照的暗部11,且液晶显示器可藉改变各所述LED光源的发光功率调整所述亮部10与所述暗部11间的对比度,以丰富影像表现的层次感及立体感。
故此,为满足市场对于视影享受的需求并振撼消费者的视觉感官,如何进一步细致各像素的灰阶层级,以大幅提升影像画面的细腻度即为本发明亟欲达成的目的。
发明内容
有鉴于现有技艺的问题,本发明的目的在于提供一种高对比的直下式背光模块,以通过提增明暗对比度而使影像画面呈现更清晰饱满的色彩显示效果。
根据本发明的目的,高对比的直下式背光模块是供以结合于一显示模块,所述直下式背光模块具有多个LED光源及一扩散板,所述多个LED光源所射出的光经所述扩散板后传送至所述显示模块,所述多个LED光源是成矩阵式排列,且所述多个LED光源所射出的光于所述扩散板上是分别成形为一椭圆形光形。
其中,各所述椭圆形光形是具有一长轴与一短轴,且所述长轴是平行所述显示模块的一垂直线,所述短轴是平行所述显示模块的一水平线。或者,各所述椭圆形光形是具有一长轴与一短轴,且所述长轴是平行所述显示模块的一水平线,所述短轴是平行所述显示模块的一垂直线。所述显示模块的长宽比为16:9,以符合大众市场对宽屏显示规格的需求。
为最佳化光形分布,各所述椭圆形光形是各所述LED光源分别经一封装胶体后一次光学折射所形成,且所述多个LED光源与所述显示模块之间的距离L是符合1mm≦L≦50mm的关系式。或,所述直下式背光模块更包含多个光形椭圆化手段,是分别设于各所述LED光源与所述扩散板之间,使各所述LED光源分别经所述封装胶体后再经各所述光形椭圆化手段而二次光学折射形成各所述椭圆形光形,且同样地,所述多个LED光源与所述显示模块之间的距离L是符合1mm≦L≦50mm的关系式,以均匀辐照光均度。
根据本发明的次一目的,高对比的直下式背光模块是供以结合于一显示模块,所述直下式背光模块具有多个LED光源及一扩散板,所述多个LED光源所射出的光经所述扩散板后传送至所述显示模块,所述扩散板具有多个光形椭圆化手段,且所述光形椭圆化手段是设于所述多个LED光源进入所述扩散板的入光面处,所述多个LED光源是成矩阵式排列,且所述多个LED光源所射出的光经所述多个光形椭圆化手段后是分别成形为一椭圆形光形。
其中,所述多个光形椭圆化手段为多个微透镜,且所述多个微透镜是成阵列方式设置。
附图说明
图1为现有直下式背光模块于扩散板上的投射光形示意图;
图2为本发明一较佳实施例的结构剖视图;
图3为本发明一较佳实施例于扩散板上的投射光形示意图;
图4为本发明次一较佳实施例的结构剖视图;
图5为本发明再一较佳实施例的结构剖视图;
图6为本发明另一较佳实施例的结构剖视图;
图7为本发明另一较佳实施例于扩散板上的投射光形示意图。
附图标记说明:
现有技术:
1-圆形光形;10-亮部;11-暗部;
本发明
2-直下式背光模块;20-基板;21-LED光源;210-封装胶体;22-扩散板;23-椭圆形光形;230-长轴;231-短轴;24-微透镜。
具体实施方式
为使贵审查委员能清楚了解本发明的内容,谨以下列说明搭配图式,敬请参阅。
请参阅图2、3,其分别为本发明一较佳实施例的结构剖视图及于扩散板上的投射光形示意图。如图所示,所述直下式背光模块2是供以结合于一显示模块(图未示),例如长宽比16:9的液晶显示器的显示面板而提供光源。所述直下式背光模块2具有一基板20、多个LED光源21及一扩散板22,所述多个LED光源21是成矩阵式排列置于所述基板20上,所述扩散板22罩覆所述多个LED光源21,用以发散所述多个LED光源21所发射的光后传送至所述显示模块,以使所述直下式背光模块2呈现全屏均匀的辉度。所述多个LED光源21所射出的光于所述扩散板22上是分别成形为一椭圆形光形23而具有一长轴230与一短轴231,且于所述扩散板22上,所述多个椭圆形光形23是相互邻接分布。于本实施例中,使各所述椭圆形光形23的所述长轴230平行所述显示模块的一垂直线,所述短轴231则平行所述显示模块的一水平线设置,而由于所述多个椭圆形光形23的中央区域沿所述长轴230方向是具有最强光亮度而朝所述短轴231方向逐渐减弱,使所述显示模块的垂直线方向即具有相对高亮度,如此,通过调整各所述椭圆形光形23的辐照强度即可改变其与相邻的椭圆形光形23间的亮暗对比度,提升各像素位置的灰阶层次感并强化影像画面的色彩丰富度及清晰度。
并且,为最佳化光形分布,所述直下式背光模块2可一并参照如图4所示,其为本发明次一较佳实施例的结构剖视图,使各所述LED光源21分别经一封装胶体210的一次光学折射后,形成各所述椭圆形光形23,且所述多个LED光源21与所述显示模块之间的距离L是符合1mm≦L≦50mm的关系式,以达均匀辐照光强度的功效。
或者,所述直下式背光模块2更可一并参考如图5所示,其为本发明再一较佳实施例的结构剖视图,利用多个光形椭圆化手段,例如微透镜24分别置于各所述LED光源21与所述扩散板22之间并套覆各所述LED光源21,使各所述LED光源21分别经所述封装胶体210后,再经各所述微透镜24进行二次光学折射而形成各所述椭圆形光形23。如此,由所述多个光形椭圆化手段即可进一步改善所述多个LED光源21的光径方向及照度分布,使形成较佳光形而提升所述显示模块的清晰度。
请一并参阅图6、7,其分别为本发明另一较佳实施例的结构剖视图及于扩散板上的投射光形示意图。如图所示,所述直下式背光模块2是供以用于液晶显示器中而提供背光源予一显示模块(图未示),其具有一基板20、多个LED光源21及一扩散板22,且所述多个LED光源21成矩阵式排列置于所述基板20上并罩覆于所述扩散板22下,使所述多个LED光源21所射出的光经所述扩散板22后传送至所述显示模块以正常显示影像画面。并且,所述扩散板22具有多个光形椭圆化手段,例如呈阵列方式设置的多个微透镜24,供以设于所述多个LED光源21进入所述扩散板22的入光面处,使所述多个LED光源21所射出的光经所述多个微透镜24后分别成形为一椭圆形光形23。
在本实施例中,各所述椭圆形光形23具有一长轴230与一短轴231,且以所述长轴230平行所述显示模块的一水平线而所述短轴231平行所述显示模块的一垂直线设置,以可加强所述显示模块水平线的光照强度。
以上所述仅为举例性的较佳实施例,而非为限制性者。任何未脱离本发明的精神与范畴,而对其进行的等效修改或变更,均应包含于后附的申请专利范围中。
Claims (10)
1.一种高对比的直下式背光模块,供以结合于一显示模块,所述直下式背光模块具有多个LED光源及一扩散板,所述多个LED光源所射出的光经所述扩散板后传送至所述显示模块,其特征在于:
所述多个LED光源是成矩阵式排列,且所述多个LED光源所射出的光于所述扩散板上是分别成形为一椭圆形光形。
2.根据权利要求1所述的高对比的直下式背光模块,其特征在于,各所述椭圆形光形是具有一长轴与一短轴,且所述长轴是平行所述显示模块的一垂直线,所述短轴是平行所述显示模块的一水平线。
3.根据权利要求1所述的高对比的直下式背光模块,其特征在于,各所述椭圆形光形是具有一长轴与一短轴,且所述长轴是平行所述显示模块的一水平线,所述短轴是平行所述显示模块的一垂直线。
4.根据权利要求1所述的高对比的直下式背光模块,其特征在于,所述显示模块的的长宽比为16:9。
5.根据权利要求1至4其中任一项所述的高对比的直下式背光模块,其特征在于,各所述椭圆形光形是各所述LED光源分别经一封装胶体后一次光学折射所形成。
6.根据权利要求5所述的直下式背光模块,其特征在于,所述多个LED光源与所述显示模块之间的距离L是符合1mm≦L≦50mm的关系式。
7.根据权利要求1至4其中任一项所述的直下式背光模块,其特征在于,更包含:多个光形椭圆化手段,是分别设于各所述LED光源与所述扩散板之间,使各所述LED光源分别经所述封装胶体后再经各所述光形椭圆化手段而二次光学折射形成各所述椭圆形光形。
8.根据权利要求7所述的直下式背光模块,其特征在于,所述多个LED光源与所述显示模块之间的距离L是符合1mm≦L≦50mm的关系式。
9.一种高对比的直下式背光模块,供以结合于一显示模块,所述直下式背光模块具有多个LED光源及一扩散板,所述多个LED光源所射出的光经所述扩散板后传送至所述显示模块,其特征在于:所述扩散板具有多个光形椭圆化手段,且所述光形椭圆化手段是设于所述多个LED光源进入所述扩散板的入光面处,所述多个LED光源是成矩阵式排列,且所述多个LED光源所射出的光经所述多个光形椭圆化手段后是分别成形为一椭圆形光形。
10.根据权利要求9所述的直下式背光模块,其特征在于,所述多个光形椭圆化手段为多个微透镜,且所述多个微透镜是成阵列方式设置。
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CN104820313A (zh) * | 2015-05-26 | 2015-08-05 | 武汉华星光电技术有限公司 | 直下式led背光模组以及液晶显示装置 |
CN105487294A (zh) * | 2016-01-29 | 2016-04-13 | 苏州东山精密制造股份有限公司 | 直下式led背光源封装结构 |
CN106257132A (zh) * | 2015-06-17 | 2016-12-28 | 中央大学 | 适应性路灯的灯具结构 |
CN106842703A (zh) * | 2017-01-25 | 2017-06-13 | 宁波正特光学电器有限公司 | 一种非对称透镜及其背光模组 |
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JP6304953B2 (ja) * | 2013-06-27 | 2018-04-04 | オリンパス株式会社 | 観察装置 |
US10278243B2 (en) * | 2014-03-06 | 2019-04-30 | Seoul Semiconductor Co., Ltd. | Backlight module with MJT LED and backlight unit including the same |
KR102364160B1 (ko) | 2014-03-06 | 2022-02-21 | 서울반도체 주식회사 | Mjt led를 이용한 백라이트 모듈 및 이를 포함하는 백라이트 유닛 |
KR102531924B1 (ko) | 2021-04-15 | 2023-05-12 | 연세대학교 산학협력단 | 생체에 삽입가능한 전극 및 이의 제조 방법 |
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- 2012-09-05 US US13/603,688 patent/US20130329163A1/en not_active Abandoned
- 2012-09-13 JP JP2012201598A patent/JP2013258125A/ja active Pending
- 2012-09-25 DE DE202012013070.6U patent/DE202012013070U1/de not_active Expired - Lifetime
- 2012-09-25 DE DE102012109054A patent/DE102012109054A1/de not_active Ceased
- 2012-10-12 KR KR1020120113320A patent/KR20130138072A/ko not_active Application Discontinuation
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JP2007264446A (ja) * | 2006-03-29 | 2007-10-11 | Harison Toshiba Lighting Corp | 液晶表示装置 |
US20080230797A1 (en) * | 2007-03-21 | 2008-09-25 | Hui-Hung Chang | LED module and manufacturing method thereof |
TW201001026A (en) * | 2008-06-23 | 2010-01-01 | Panasonic Corp | Light emitting apparatus, planar light emitting apparatus and display apparatus |
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CN104820313A (zh) * | 2015-05-26 | 2015-08-05 | 武汉华星光电技术有限公司 | 直下式led背光模组以及液晶显示装置 |
WO2016187899A1 (zh) * | 2015-05-26 | 2016-12-01 | 武汉华星光电技术有限公司 | 直下式led背光模组以及液晶显示装置 |
CN106257132A (zh) * | 2015-06-17 | 2016-12-28 | 中央大学 | 适应性路灯的灯具结构 |
CN105487294A (zh) * | 2016-01-29 | 2016-04-13 | 苏州东山精密制造股份有限公司 | 直下式led背光源封装结构 |
CN106842703A (zh) * | 2017-01-25 | 2017-06-13 | 宁波正特光学电器有限公司 | 一种非对称透镜及其背光模组 |
CN106842703B (zh) * | 2017-01-25 | 2019-11-15 | 宁波正特光学电器有限公司 | 一种非对称透镜及其背光模组 |
Also Published As
Publication number | Publication date |
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JP3192344U (ja) | 2014-08-07 |
KR20130138072A (ko) | 2013-12-18 |
US20130329163A1 (en) | 2013-12-12 |
DE102012109054A1 (de) | 2013-12-12 |
JP2013258125A (ja) | 2013-12-26 |
TW201350994A (zh) | 2013-12-16 |
DE202012013070U1 (de) | 2014-09-08 |
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