CN101295036A - 背光模组及其光学板 - Google Patents
背光模组及其光学板 Download PDFInfo
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Abstract
本发明涉及一种背光模组及其光学板。该光学板包括至少一个光学板单元,该光学板单元包括一个出光面及一个与该出光面相对的底面,该底面开设有光源容纳部,且该光学板单元还包括多个贯通该出光面与该底面的出光通孔。采用该光学板的背光模组具有出光均匀的优点。
Description
技术领域
本发明涉及一种背光模组及其光学板,尤其涉及一种用于液晶显示的背光模组及其光学板。
背景技术
由于液晶显示器面板的液晶本身不具发光特性,因而,为达到显示效果,需给液晶显示器面板提供一面光源装置,如背光模组。背光模组作用是向液晶显示器面板供应亮度充分且分布均匀的面光源。
请一并参见图1与图2,所示为一种现有的背光模组100,其包括一框架101、一反射板102、一扩散板103、一棱镜片104及至少一发光二极管105。框架101包括一底板1011及多个从该底板1011边缘向其同一侧垂直延伸的侧壁1013。底板1011与多个侧壁1013共同形成一腔体(图未标)。发光二极管105设置于底板1011,其包括一个发光部1051。扩散板103与棱镜片104依次设置于多个侧壁1013顶部。扩散板103可使从发光二极管105出射的光线发生扩散,以提高背光模组100的出光均匀性。棱镜片104可提高背光模组100在特定视角范围内的出光亮度。反射板102为一个小框体结构,其可配置于框架101内部。该反射板102的底部开设有与发光二极管105相对应的通孔(图未标),且发光二极管105的发光部1051穿过相应通孔向扩散板103发射光束。
工作时,发光二极管105产生的光线进入扩散板103被扩散后,其继续进入棱镜片104,棱镜片104的V形微棱镜结构使出射光线发生一定程度的聚集,以提高背光模组在特定视角范围内的亮度。
然而,由于发光二极管105为点光源,其到达扩散板103上各处的距离大小不相等,扩散板103位于发光二极管105正上方处单位区域所接受光较多,位于发光二极管105周围的单位区域所接受光较少,因此容易在发光二极管105正上方形成亮区,而在发光二极管105周围区域形成暗区,影响背光模组100的出光均匀性。为此,通常在发光二极管105上或在扩散板103与发光二极管105对应的区域设置反射片107,以控制发光二极管105正上方的出光量。发光二极管105与反射片107的搭配设计,可一定程度上消除发光二极管105正上方的亮区,降低与周围区域之亮暗对比度,但是背光模组100仍然存在出光不均的不足。
发明内容
鉴于上述状况,有必要提供一种出光均匀的背光模组及其光学板。
一种光学板,其包括至少一个光学板单元,该光学板单元包括一个出光面及一个与该出光面相对的底面,该底面开设有光源容纳部,且该光学板单元还包括多个贯通该出光面与该底面的出光通孔。
一种背光模组,其包括一框架、一扩散板、一点光源及一光学板,框架包括一底板及多个从该底板边缘向其一侧垂直延伸的侧壁,多个侧壁相互连接并与底板共同形成一腔体,该扩散板设置于多个侧壁顶部,光学板包括一个光学板单元,该光学板单元包括一个出光面及一个与该出光面相对的底面,该底面开设有光源容纳部,且该光学板单元还包括多个贯通该出光面与该底面的出光通孔,光学板设置于底板与扩散板之间且其光学板单元之出光面面向扩散板。
与现有技术相比较,所述背光模组的光学板的光学板单元包括开设于该底面的光源容纳部及多个贯通出光面与底面的出光通孔。点光源的发光部可容置于光源容纳部内,该光源容纳部可使得点光源所发出的光线射入光学板内。光线于光学板内传输时,原来于光学板内全反射的部分光线可被出光通孔调节(折射)后沿特定方向从出光面出射,从而增加相应区域正面出射的出光量,从而易于避免在点光源上方或者四周的区域产生亮区或暗区,提高背光模组的出光均匀性。因此,采用该光学板的背光模组具有出光均匀的优点。
附图说明
图1是现有技术的背光模组的结构示意图。
图2是图1局部II所示的放大图。
图3是本发明较佳实施例一的光学板的结构示意图。
图4是图3所示光学板沿IV-IV线的剖面示意图。
图5是本发明较佳实施例二的背光模组的剖面示意图。
图6是图5局部VI所示的放大图。
图7是本发明较佳实施例三的光学板的结构示意图。
图8是图7所示光学板沿VIII-VIII线的剖面示意图。
图9是本发明较佳实施例四的光学板的剖面示意图。
图10是本发明较佳实施例五的光学板的剖面示意图。
图11是本发明较佳实施例六的光学板的剖面示意图。
图12是本发明较佳实施例七的光学板的俯视图。
图13是本发明较佳实施例八的光学板的俯视图。
具体实施方式
下面将结合附图和多个实施例对本发明的光学板作进一步的详细说明。
请一并参阅图3和图4,本发明较佳实施例一提供一种光学板20。该光学板20呈四方形,其包括多个光学板单元21,该多个光学板单元21为阵列紧密排布。每一光学板单元21包括一个出光面212、一个与该出光面212相对的底面213及多个出光通孔215。该出光面212与该底面213为平面,该底面213开设有一个光源容纳部214,且该多个出光通孔215贯通该出光面212与该底面213。本实施例中,该光源容纳部214为从底面213贯穿至出光面212的圆柱形通孔,且位于光学板单元的中心。该多个出光通孔215为圆柱形通孔,以光源容纳部214为中心对称排布。
请一并参阅图5与图6,本发明较佳实施例二提供一背光模组200。该背光模组200包括一框架201、一扩散板203、多个点光源205以及一如较佳实施例一所述的光学板20。框架201包括一底板2011及四个从该底板2011边缘向其一侧垂直延伸的侧壁2013,四个侧壁2013相互连接并与底板2011共同形成一腔体(图未标),用于收容点光源205与光学板20。扩散板203设置于多个侧壁2013顶部。光学板20设置于底板2011与扩散板203之间且其光学板单元21之出光面212面向扩散板203。多个点光源205分别设置于底板2011且其发光部2051分别位于相应光学板20的光源容纳部214内。该点光源205优选发光二极管。
由于点光源205的发光部2051可设置于光源容纳部214处,点光源205所发出的光线通过光源容纳部214的侧壁射入光学板20内。光线于光学板20内传输过程中,由于光线射至出光通孔215表面各点的入射角度不同,使光线到达出光通孔215时,原来于光学板内全反射的部分光线可被其调节(折射)后沿特定方向从出光面212出射,例如将部分光线调节至靠近垂直扩散板203的正面方向出射,从而增加相应区域正面出射的出光量,避免在相邻的点光源205之间或点光源205周围的上方产生暗区,提高背光模组200的出光均匀性。因此,采用该光学板20的背光模组200具有出光均匀的优点。
另外,由于采用光学板20的背光模组200可避免暗区形成,所以,扩散板203与光学板20之间可设置较小的间距甚至可直接接触。因此,采用该光学板20的背光模组200具有厚度相对较薄的优点。
可以理解,为提高光的利用率,还可于光学板20的光学板单元21的底面213一侧设置一反射板202,该反射板202可将透过底面213出射的光线反射回光学板20。点光源205的发光部2051上方可设置反射片207。该反射片207可使得点光源205直接正面出射至扩散板203的光线被减弱,因此可避免在点光源205的正上方出现亮点,进一步提高背光模组200的出光均匀性。
可以理解,为使得该背光模组200在特定的视觉范围内具有较高的亮度,还可于扩散板203上设置一棱镜片204。
请一并参阅图7与图8,本发明较佳实施例三提供一种光学板30。该光学板30与较佳实施例一的光学板20相似,其不同在于:光学板30仅包括一个光学板单元。该光学板单元包括一个出光面312、一个与该出光面312相对的底面313、一个开设于该底面313的光源容纳部314及多个贯通该出光面312与该底面313的出光通孔315。该出光面312与该底面313为平面。本实施例中,该光源容纳部314为从底面313贯穿至出光面312的圆柱形通孔,且开设于底面313的中心。该多个出光通孔315为圆柱形通孔,且呈阵列排布。
请参阅图9,本发明较佳实施例四提供一种光学板50。该光学板50与较佳实施例三的光学板30相似,其不同在于:开设于光学板50的底面513的光源容纳部514为圆柱形盲孔。
请参阅图10,本发明较佳实施例五提供一种光学板60。该光学板60与较佳实施例三的光学板30相似,其不同在于:光学板60上贯通出光面612与底面613的多个出光通孔615为圆锥台形通孔。
请参阅图11,本发明较佳实施例六提供一种光学板70。该光学板70与较佳实施例三的光学板30相似,其不同在于:光学板70上贯通出光面712与底面713的多个出光通孔715为不规则通孔,且中间部分的内径比其两端的内径小。
可以理解,出光通孔可为棱柱形、棱锥台形等其它结构的通孔;并且,多个出光通孔的形状与大小可以相同,也可不同。
请参阅图12,本发明较佳实施例七提供一种光学板80。该光学板80与较佳实施例三的光学板30相似,其不同在于:光学板80上的多个出光通孔815为随机排布。
可以理解,多个出光通孔可以光源容纳部为中心对称排布,甚至还可为紧密排布或间隔排布等。
请参阅图13,本发明较佳实施例八提供一种光学板90。该光学板90与较佳实施例三的光学板30相似,其不同在于:光学板90为一个正八边形。
可以理解,本发明的光学板也可以是三角形、五边形、六边形或者其他形状,甚至还可为楔形。此外,为提高上述背光模组的亮度或用不同颜色的发光二极管混光形成白光,上述光学板或光学板单元的光源容纳部可为多个,以使光学板或光学板单元可对应容纳多个光源
Claims (10)
1.一种光学板,其包括至少一个光学板单元,该光学板单元包括一个出光面及一个与该出光面相对的底面,其特征在于:该底面开设有光源容纳部,且该光学板单元还包括多个贯通该出光面与该底面的出光通孔。
2.如权利要求1所述的光学板,其特征在于:该出光通孔为柱形通孔。
3.如权利要求1所述的光学板,其特征在于:该出光通孔为锥台形通孔。
4.如权利要求1所述的光学板,其特征在于:该出光通孔的中间部分的内径比其两端的内径小。
5.如权利要求1所述的光学板,其特征在于:该多个出光通孔呈阵列排布。
6.如权利要求1所述的光学板,其特征在于:该光学容纳部位于该底面中央,该多个出光通孔分布在该光学容纳部周围。
7.如权利要求1所述的光学板,其特征在于:该光源容纳部为盲孔与通孔之一。
8.如权利要求1所述的光学板,其特征在于:该光学板包括多个光学板单元,且该多个光学板单元为阵列排布并紧密相连。
9.一种背光模组,其包括一框架、一扩散板、一点光源及一光学板,框架包括一底板及多个从该底板边缘向其一侧垂直延伸的侧壁,多个侧壁相互连接并与底板共同形成一腔体,扩散板设置于多个侧壁顶部,该光学板包括一个光学板单元,该光学板单元包括一个出光面及一个与该出光面相对的底面,光学板设置于底板与扩散板之间且其光学板单元之出光面面向扩散板,其特征在于:该底面开设有光源容纳部,且该光学板单元还包括多个贯通该出光面与该底面的出光通孔,该点光源设置于底板且其发光部容置于该光源容纳部。
10.如权利要求9所述的背光模组,其特征在于:该点光源的发光部上方设置有反射片,该光学板单元的底面一侧设置有反射板。
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| CN200710200520.7A CN101295036A (zh) | 2007-04-27 | 2007-04-27 | 背光模组及其光学板 |
| US11/845,790 US7677749B2 (en) | 2007-04-27 | 2007-08-28 | Optical plate and backlight module using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710200520.7A CN101295036A (zh) | 2007-04-27 | 2007-04-27 | 背光模组及其光学板 |
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| CN102706898A (zh) * | 2012-05-30 | 2012-10-03 | 昆山明本光电有限公司 | 一种脉理观察器及其使用方法 |
| CN106873072A (zh) * | 2017-04-24 | 2017-06-20 | 京东方科技集团股份有限公司 | 导光组件及其制备方法、背光模组和显示装置 |
| CN107703580A (zh) * | 2017-09-28 | 2018-02-16 | 上海斐讯数据通信技术有限公司 | 一种圆环形导光板 |
| CN113253513A (zh) * | 2020-02-07 | 2021-08-13 | 日亚化学工业株式会社 | 发光模块以及面状光源 |
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- 2007-04-27 CN CN200710200520.7A patent/CN101295036A/zh active Pending
- 2007-08-28 US US11/845,790 patent/US7677749B2/en not_active Expired - Fee Related
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| CN113253513B (zh) * | 2020-02-07 | 2023-11-28 | 日亚化学工业株式会社 | 发光模块以及面状光源 |
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| US7677749B2 (en) | 2010-03-16 |
| US20080266875A1 (en) | 2008-10-30 |
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