CN108983347A - 一种微结构导光板及其显示模组 - Google Patents
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Abstract
本发明公开了一种微结构导光板及其显示模组,包括导光板本体(100),所述导光板本体(100)具有入光面(101)、出光面(102)、及背面(103),所述背面(103)设有若干个凹槽微结构(104),所述背面(103)沉积有树脂层(105)。本发明提供的微结构导光板及其显示模组,可提高导光板强度,均匀画质,便于实现显示模组的轻薄化。
Description
技术领域
本发明涉及导光板技术领域,特别涉及一种微结构导光板及其显示模组。
背景技术
现有导光板一般使用光学级亚克力材料,可以通过印刷、射出、热压、喷墨等方式制备网点,导光板结构通常为长方体,入光面与出光面垂直,如图1。图2、3为现有导光板截面结构,1-1为导光板入光面,1-2为导光板出光面,1-3为导光板背面,1-4为凸起微结构,1-5为凹槽微结构。其中图2为通过印刷,喷印,压印等方式形成的凸起微结构,图3为通过热压,激光形成的凹槽微结构。可以根据网点或微结构的大小和密度调节出光的大小,从而实现均匀出光。
目前导光板已经广泛应用到液晶显示屏的背光模组中,如手机、笔记本、显示器、电视机等。图4是采用现有导光板的液晶模组截面结构图,由模组前框、液晶玻璃、胶框、光学膜片、导光板、反射片、光源及后壳组成。反射片和导光板依次放置在后壳腔体内,后壳作为结构支撑及部分外观功能。
采用现有导光板结构的液晶模组结构复杂,整机厚度较厚,成本较高,而且背板一般为金属或者塑胶件,其颜色单一,很难制作不同的外观效果。为了达到显示模组的超薄设计,通常采取降低导光板的厚度,导光板厚度的降低后,与之匹配的LED厚度也要降低,而现有超薄LED亮度无法满足大尺寸TV高亮度的需求。同时PMMA变薄后,其容易变形,导致入光不均匀,容易出现局部漏光。近几年康宁开发出超透明的玻璃,可以媲美光学亚克力的穿透率和透明度,有采用传统工艺在玻璃背面丝印网点,在显示器和电视机上使用,但对更小尺寸,因印刷网点大小低于0.2mm后,其工艺不具备量产性,无法在小尺寸及超薄的导光板上应用。目前业有采用激光的工艺制备凹槽,凹槽有微裂纹造成玻璃破损,同时凹槽不均匀,凹槽形成的光学散射点不柔和的问题。
发明内容
本发明目的是提供一种微结构导光板及其显示模组,可以提高导光板强度,均匀画质。
基于上述问题,本发明提供的技术方案是:
一种微结构导光板,包括导光板本体,所述导光板本体具有入光面、出光面、及背面,所述背面设有若干个凹槽微结构,所述背面沉积有树脂层。
在其中的一些实施方式中,所述树脂层为环氧树脂、酚醛树脂、聚丙烯酸树脂、聚氯乙烯树脂中的一种。
在其中的一些实施方式中,所述树脂层内添加有扩散粒子。
在其中的一些实施方式中,所述树脂层外设有复合反射层。
在其中的一些实施方式中,所述复合反射层包括由所述树脂层由内而外设置的光学胶层和反射片。
在其中的一些实施方式中,所述光学胶层的折射率为1~1.47。
在其中的一些实施方式中,所述凹槽微结构与所述光学胶层之间的凹腔内封闭有粉体粒子和/或气体。
在其中的一些实施方式中,所述粉体粒子为扩散粒子或荧光粒子。
在其中的一些实施方式中,所述气体为空气、氩气、氮气、氦气中的一种。
一种显示模组,其具有上述任意一项所述的导光板。
与现有技术相比,本发明的优点是:
1、采用本发明的技术方案,在导光板背面设有若干个凹槽微结构,在背面沉积树脂层,提升玻璃导光板强度,增加凹槽处的平滑度和漫反射性,得到均匀的画质;
2、采用本发明进一步的技术方案,将导光板背面经光学胶层粘贴在反射片上形成复合导光板,可取消后壳,实现显示模组的超薄设计。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为现有技术中导光板的结构示意图;
图2为现有技术中一种导光板的截面示意图;
图3为现有技术中另一种导光板的截面示意图;
图4为现有技术中显示模组的结构示意图;
图5为本发明导光板实施例的结构示意图;
图6为本发明导光板形成一种复合导光板的结构示意图;
图7为本发明导光板形成另一种复合导光板的结构示意图;
图8为采用本发明导光板的一种显示模组的结构示意图;
图9为采用本发明导光板的另一种显示模组的结构示意图;
其中:
1、导光板;1-1、入光面;1-2、出光面;1-3、背面;1-4、凸起微结构;1-5、凹槽微结构;2、液晶玻璃;3、光学膜片;4、空气层;5、空气层;6、反射片;7、后壳;8、光源;
100、导光板本体;101、入光面;102、出光面;103、背面;104、凹槽微结构;105、树脂层;106、粉体粒子;200、光学胶层;300、反射片;400、液晶玻璃;500、光学膜片;600、光学胶层或空气层;700、光源。
具体实施方式
以下结合具体实施例对上述方案做进一步说明。应理解,这些实施例是用于说明本发明而不限于限制本发明的范围。实施例中采用的实施条件可以根据具体厂家的条件做进一步调整,未注明的实施条件通常为常规实验中的条件。
参见图5,为本发明的结构示意图,提供一种微结构导光板,包括导光板本体100,该导光板本体100具有入光面101、出光面102、及背面103,在背面设有若干个凹槽微结构104,本发明的改进之处在于,在背面103沉积有树脂层105,该树脂层105为环氧树脂、酚醛树脂、聚丙烯酸树脂、聚氯乙烯树脂中的一种,通过涂布喷涂或浸泡,胶水渗透进入凹槽微结构104表面的微裂缝或不均匀表面,固化后形成一层均匀的树脂层105,可以有效提升玻璃导光板的强度,以及凹槽截面的平滑度,均匀画质。
为了进一步优化本发明的实施效果,还可以在胶水中添加扩散粒子,光线可以在树脂层中扩散,可以在凹槽的顶面形成漫反射,得到均匀的画质。其中,扩散粒子为有机粒子和/或无机粒子,有机粒子选自聚烯烃、聚苯乙烯、聚酰胺、聚氨酯中的任一种或多种,无机粒子选自硅、SiO2、TiO2、Al2O3和ZrO2中的任一种或多种。该导光板可用于现有技术中的显示模组,具体结构参见图8所示。
为了实现显示模组的轻薄化,在树脂层105外设有复合反射层,可取消现有技术中的后壳结构,该复合反射层包括由树脂层105由内向外设置的光学胶层200和反射片300,树脂层105经光学胶层200粘贴在反射片300上,其中光学胶层200的折射率为1~1.47。
参见图6,导光板本体100经光学胶层200粘贴在发射片300上,凹槽微结构104与光学胶层200之间的凹腔内封闭有空气。
参见图7,凹槽微结构104中封闭有粉体粒子106和气体,粉体粒子106为扩散粒子或不同颜色荧光粒子,气体可以为空气、氩气、氮气、氦气中的一种,可在光源700作用下形成幻彩效果。
参见图9,采用如图6所示的复合导光板制成显示模组,可取消后壳,还可以将导光板上表面的光学膜片500通过光学胶层与导光板本体100粘贴,进一步实现轻薄化。
上述实例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人是能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所做的等效变换或修饰,都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种微结构导光板,包括导光板本体(100),所述导光板本体(100)具有入光面(101)、出光面(102)、及背面(103),所述背面(103)设有若干个凹槽微结构(104),其特征在于:所述背面(103)沉积有树脂层(105)。
2.根据权利要求1所述的微结构导光板,其特征在于:所述树脂层(105)为环氧树脂、酚醛树脂、聚丙烯酸树脂、聚氯乙烯树脂中的一种。
3.根据权利要求2所述的微结构导光板,其特征在于:所述树脂层(105)内添加有扩散粒子。
4.根据权利要求3所述的微结构导光板,其特征在于:所述树脂层(105)外设有复合反射层。
5.根据权利要求4所述的微结构导光板,其特征在于:所述复合反射层包括由所述树脂层(105)由内而外设置的光学胶层(200)和反射片(300)。
6.根据权利要求5所述的微结构导光板,其特征在于:所述光学胶层(200)的折射率为1~1.47。
7.根据权利要求5所述的微结构导光板,其特征在于:所述凹槽微结构(104)与所述光学胶层(200)之间的凹腔内封闭有粉体粒子(106)和/或气体。
8.根据权利要求7所述的微结构导光板,其特征在于:所述粉体粒子(106)为扩散粒子或荧光粒子。
9.根据权利要求7所述的微结构导光板,其特征在于:所述气体为空气、氩气、氮气、氦气中的一种。
10.一种显示模组,其特征在于:具有权利要求1-9任意一项所述的导光板。
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