CN101153992A - 背光源及其发光二极管模组 - Google Patents
背光源及其发光二极管模组 Download PDFInfo
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Abstract
本发明公开一种应用于液晶显示装置的发光二极管模组,其包括一块基板,及形成于该基板表面的至少一个发光单元;其中,每个发光单元包括两个第一发光二极管,一个第二发光二极管与一个第三发光二极管,且该四个发光二极管的连线构成一多边形。另,本发明还公开一种背光源。上述发光二极管模组与背光源具有易于散热的优点。
Description
技术领域
本发明涉及一种用于液晶显示装置的背光源及其发光二极管模组。
背景技术
液晶显示装置被广泛应用于个人数位助理、笔记型电脑、数字相机、移动电话、液晶电视等电子产品中。但由于液晶显示装置为非自发光性的,因此其需要借助背光模组才能产生显示功能。
目前背光模组中的发光装置一般为冷阴极荧光灯(Cold Cathode Fluorescent Lamp,CCFL)与发光二极管(Light Emitting Diode,LED)。其中,发光二极管是一种固态的半导体发光装置,其是利用二极管内分离的两种载流子(带负电之电子与带正电之电洞)相互结合而产生光。与冷阴极荧光灯相比,发光二极管具有高色彩饱和度、不含汞、寿命长及可透过驱动电流调整色温等优点。
请参见图1,一种现有背光模组用发光二极管背光源100’。发光二极管背光源100’包括多个发光二极管模组10’,其中每个发光二极管模组10’包括基板11’,与形成于基板11’上的多个发光二极管单元12’。发光二极管单元12’排列成一行,其包括处于同一直线上的绿光发光二极管121’,红光发光二极管122’以及蓝光发光二极管123’。为使背光源100’发出的光线为白光,发光二极管单元12’一般以两个绿光发光二极管121’、一个红光发光二极管122’及一个蓝光发光二极管123’的排列为一个白光单元;例如,从左至右,该白光单元以一个绿光发光二极管121’、一个红光发光二极管122’、一个蓝光发光二极管123’及一个绿光发光二极管121’的顺序周期排列。
尽管发光二极管单元12’发光时产生的热量较小;但当背光源100’需要光强度较大,而使每个发光二极管模组10’所需发光二极管单元12’的数量较多时,由于发光二极管单元12’集中排列于一条直线上,且发光二极管单元12’内的发光二极管需紧密排列以产生白光,因此容易使发光二极管单元12’产生的热量集中局部区域难以散发,而造成模组10’局部过热。
因此,有必要提供一种易于散热的发光二极管模组及采用该发光二极管模组的背光源。
发明内容
以下将以实施例说明一种易于散热的发光二极管模组及采用该发光二极管模组的背光源
一种发光二极管模组,其包括一块基板,及形成于该基板表面的至少一个发光单元;其中,每个发光单元包括两个第一发光二极管,一个第二发光二极管与一个第三发光二极管,且该四个发光二极管的连线构成一多边形。
一种背光源,其包括发光二极管模组,该发光二极管模组包括一块基板,及形成于该基板表面的多个发光单元;其中,每个发光单元包括两个第一发光二极管,一个第二发光二极管与一个第三发光二极管,且该四个发光二极管的连线构成一多边形。
相对于现有技术,所述背光源及其发光二极管模组,包括发光单元,在该发光单元内的四个发光二极管的连线构成一多边形,即发光二极管不集中在一条直线上;从而,在确保发光单元内的发光二极管混光效果较好的前提下,容易使发光单元内的两两发光二极管之间的距离皆较大而让其排布相对较为分散;且当发光二极管的数量较多时,发光二极管的排布也可较为分散;因此可易于防止发光二极管产生的热量集中在局部,避免局部过热现象的发生。因此,上述发光二极管模组与背光模源具有易于散热的优点。
附图说明
图1是一种现有背光模组用发光二极管光源示意图。
图2是本发明发光二极管模组较佳实施例一的结构示意图。
图3是本发明发光二极管模组较佳实施例二的结构示意图。
图4是本发明发光二极管模组较佳实施例三的结构示意图。
图5是本发明发光二极管模组较佳实施例四的结构示意图。
图6是本发明发光二极管模组较佳实施例五的结构示意图。
图7是本发明背光源较佳实施例一的结构示意图。
图8是本发明背光源较佳实施例二的结构示意图。
具体实施方式
下面将结合附图及实施例对发光二极管模组及采用该发光二极管模组的背光源做进一步详细说明。
请参见图2,本发明发光二极管模组较佳实施例一的结构示意图。该发光二极管模组10包括一块基板11,及形成于该基板11表面的四个发光单元12。该基板11可为铝基板,其可根据使用环境来确定形状,本实施例铝基板为长条形。该每个发光单元12包括两个第一发光二极管121,一个第二发光二极管122及一个第三发光二极管123。第一发光二极管121,第二发光二极管122及第三发光二极管123可以选用不同的颜色,其主要依据模组10需要发出的光颜色来定;例如,在本实施例中,为使模组10发出白光,第一发光二极管121,第二发光二极管122及第三发光二极管123,分别为绿色发光二极管,红色发光二极管及蓝色发光二极管。
其中,从模组10的整体来看,该多个发光单元12之间排成一条直线,且所有的第一发光二极管121分布在两条平行线上;所有的第二发光二极管122与第三发光二极管133处于同一直线上,且该直线与第一发光二极管121所在的平行线相平行。另外,从单个发光单元12来看,在每个发光单元12内,四个发光二极管之间的连线,构成一多边形,该多边形可为三角形或四边形;具体在本实施例中为四个发光二极管之间的连线构成一平行四边形,该平行四边形的两条对角线垂直相交,且两个第一发光二极管121相对位于平行四边形的顶点。
工作过程中,由于在每个发光单元12内,两个第一发光二极管121,第二发光二极管122与第三发光二极管123的连线构成一多边形,即该四个发光二极管不集中在一条直线上;从而,在确保发光单元12内的发光二极管混光效果较好的前提下,容易使发光单元12内的两两发光二极管之间的距离皆较大而让其排布相对较为分散;且当发光二极管的数量较多时,发光二极管的排布也可较为分散;因此可易于防止发光二极管产生的热量集中在局部,避免局部过热现象的发生。
请参见图3,本发明发光二极管模组较佳实施例二的结构示意图。该发光二极管模组20的结构与实施例一的发光二极管模组10相似,亦包括一块基板21及形成于该基板21表面的四个发光单元22,其中,每个发光单元22内包括两个第一发光二极管221,一个第二发光二极管222及一个第三发光二极管223;其不同点在于:两个第一发光二极管221,第二发光二极管222与第三发光二极管223之间构成的四边形的两条对角线的交角θ为60o。
请参见图4,本发明发光二极管模组较佳实施例三的结构示意图。该发光二极管模组30的结构与实施例一的发光二极管模组10相似,亦包括一块基板31及形成于该基板31上的四个发光单元32,其不同点在于:在该发光单元32的周围设置有反光围栏33,该反光围栏33为由多个反光隔板331组成的闭合的多边形,本实施例中该多个反光隔板331围成的反光围栏33为四方形。该反光隔板331可由高光反射率的材料制成。通过设置反光围栏33,可使发光二极管产生的光线由于反光围栏33的反射作用,在各个发光单元32内既实现较充分的混合,继而易于提高整个模组30出射的光线的混光均匀性。
请参见图5,本发明发光二极管模组较佳实施例四的结构示意图。该发光二极管模组40的结构与实施例三的发光二极管模组30相似,亦包括有反光围栏43,其不同点在于:该反光围栏43的结构为圆形。
进一步,请参见图6,本发明发光二极管模组较佳实施例五的结构示意图。为便于实现第一发光二极管521,第二发光二极管522与第三发光二极管523的区域化控制,而易于使模组50发出的光线颜色可变化,可用第一导线511将该模组50中所有的第一发光二极管521、用第二导线512将所有的第二发光二极管522及用第三导线513将所有的第三发光二极管523分别并联在一起,使第一发光二极管521、第二发光二极管522及第三发光二极管523可分别控制发光。且可以理解,各个发光单元52还可分别采用的不同的线路开关(图未示)控制,使该模组50在可发出各种颜色的光线时还易于控制整体出射光强的大小。
另,请参见图7,本发明背光源较佳实施例一的结构示意图。该背光源100包括三个发光二极管模组60。该每个发光二极管模组60与发光二极管模组10相似,包括基板61,及形成于该基板61表面的发光单元62;该发光单元62包括有两个第一发光二极管621,一个第二发光二极管622与一个第三发光二极管623。
从该背光源100的整体来看,在X方向上,每个发光单元62内的发光二极管可分布在三列上,具体在本实施例中为:由左至右,第一列由第二发光二极管622组成,第二列由第一发光二极管621组成,第三列由第三发光二极管623组成,然后依此顺序周期排列;其中,第二列、第五列、第八列与第十一列的发光二极管数量为其他列发光二极管的两倍。在Y方向上,每个发光单元62内的发光二极管可分布在三行上,具体在本实施例中为:由上到下,本实施例为第一行由第一发光二极管621组成,第二行由第二发光二极管622与第三发光二极管623组成,第三行由第一发光二极管621组成,然后依此顺序周期排列;其中,第二行、第五行、第八行与第十一行的发光二极管数量为其他行发光二极管的两倍。从单个发光单元62来看,两个第一发光二极管621,第二发光二极管622与第三发光二极管623之间的连线构成的平行四边形的两条对角线垂直相交。
工作过程中,由于第一发光二极管621、第二发光二极管622与第三发光二极管623被较为分散的排布,因此发光二极管产生的热量不易集中在局部,进而可避免局部过热现象的发生。
请参见图8,本发明发光二极管背光源较佳实施例二的结构示意图。该发光二极管背光源200与背光源100相似,亦包括有三个发光二极管模组70;其不同点在于,该发光二极管模组70与发光二极管模组20相似,且从该背光源100的从整体上看,各行与各列上的发光二极管数量相同,具体为每个发光二极管单元72内的发光二极管分布在四行或者四列上。
可以理解,在背光源100、200中,在每个发光单元内,该第一发光二极管、第二发光二极管与第三发光二极管的相对位置可以改变,使每列与每行都可同时排布有不同发光颜色的发光二极管,而使得背光源所发出的光线具有更好的混光效果。
Claims (12)
1.一种发光二极管模组,其包括一基板,及形成于该基板表面的至少一个发光单元,其特征在于:每个发光单元包括两个第一发光二极管,一个第二发光二极管与一个第三发光二极管,且该四个发光二极管的连线构成一多边形。
2.如权利要求1所述的发光二极管模组,其特征是:该四个发光二极管的连线构成的多边形为四边形。
3.如权利要求1所述的发光二极管模组,其特征是:该基板的形状为条形,该发光单元为多个,且该多个发光单元成阵列状排列于该基板。
4.如权利要求1所述的发光二极管模组,其特征是:该两第一发光二极管为绿光发光二极管,该第二发光二极管为蓝光发光二极管,该第三发光二极管为红光发光二极管。
5.如权利要求4所述的发光二极管模组,其特征是:该两第一发光二极管,第二发光二极管与第三发光二极管构成的多边形为平行四边形,该平行四边形的两条对角线垂直相交,且该两第一发光二极管相对位于平行四边形的顶点。
6.如权利要求1所述的发光二极管模组,其特征是:该发光单元为多个,其中,多个第一发光二极管并联式电连接、多个第二发光二极管并联式电连接及多个第三发光二极管并联式电连接。
7.如权利要求1所述的发光二极管模组,其特征是:该发光二极管模组还包括反光围栏,该反光围栏设置在该发光单元的外围,其用于提高该发光单元的混光均匀性。
8.如权利要求7所述的发光二极管模组,其特征是:该反光围栏的结构为圆形与多边形之一。
9.一种背光源,其包括发光二极管模组,该发光二极管模组包括一块基板,及形成于该基板表面的多个发光单元,其特征在于:每个发光单元包括两个第一发光二极管,一个第二发光二极管与一个第三发光二极管,且该四个发光二极管的连线构成一多边形。
10.如权利要求9所述的背光源,其特征是:该多个发光单元所包括的所有的发光二极管成阵列状排布,且每个发光单元内的发光二极管分布在三行或三列上。
11.如权利要求9所述的背光源,其特征是:该多个发光单元所包括的所有的发光二极管成阵列状排布,且每个发光单元内的发光二极管分布在四行或四列上。
12.如权利要求9所述的背光源,其特征是:该各行或各列上同时排布包括有两种以上不同发光颜色的发光二极管。
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US11/623,294 US20080080177A1 (en) | 2006-09-29 | 2007-01-15 | Light emitting diode module and backlight system using the same |
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