CN111367007B - 背光模组、导光板及其导电水凝胶的制备方法 - Google Patents

背光模组、导光板及其导电水凝胶的制备方法 Download PDF

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CN111367007B
CN111367007B CN201811603495.1A CN201811603495A CN111367007B CN 111367007 B CN111367007 B CN 111367007B CN 201811603495 A CN201811603495 A CN 201811603495A CN 111367007 B CN111367007 B CN 111367007B
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light guide
conductive hydrogel
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CN111367007A (zh
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季洪雷
邓天应
强科文
陈细俊
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Shenzhen TCL New Technology Co Ltd
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Abstract

本发明公开背光模组、导光板及其导电水凝胶的制备方法，导光板主体为光学玻璃材料，导光板内置空腔，所述空腔内填充导电水凝胶，导光板两端设置有与空腔内导电水凝胶电连接的电极；导电水凝胶未通电时为液体形态，当空腔内的导电水凝胶通电后变成胶体形态。导电水凝胶中添加有微小晶体颗粒，以增强导光板对于光的反射和漫反射功能。本发明导光板能够增强背光模组对光的反射和漫反射功能，让更多光线穿透导光板从而提高光效，导电水凝胶中添加量子点或荧光粉能够进一步提高背光的色域，使液晶显示装置的效果更好。

Description

背光模组、导光板及其导电水凝胶的制备方法
技术领域
本发明涉及LED显示技术领域，尤其涉及一种背光模组、导光板及其导电水凝胶的制备方法。
背景技术
对于液晶显示背光模组而言，导光板为侧入式背光模组的主要关键部件，传统的导光板均是以塑胶类（PMMA、MS等）为主，除此之外还有光学级别的玻璃材料导光板已陆续在背光模组产品中有所应用。现有技术导光板的应用均存在背光模组热集中的问题，使得***散热设计存在不足。
因此，现有技术还有待于改进和发展。
发明内容
鉴于上述现有技术的不足之处，本发明为解决现有技术缺陷和不足，提出了一种能够加速散热，且透光率高的导光板及其背光模组，同时还包括导光板内置的水凝胶的制备方法。
本发明解决技术问题所采用的技术方案如下：
一种导光板，所述导光板主体为光学玻璃材料，导光板内置空腔，所述空腔内填充导电水凝胶，所述导光板两端设置有与空腔内导电水凝胶电连接的电极；所述导电水凝胶未通电时为液体形态，当空腔内的导电水凝胶通电后变成胶体形态。
作为一种改进技术方案，所述导电水凝胶中添加有微小晶体颗粒，以增强导光板对于光的反射和漫反射功能。
作为一种改进技术方案，所述导电水凝胶中添加量子点或荧光粉，以提高显示色域。
本发明还提供一种导电水凝胶的制备方法，用于制备上述导光板中的导电水凝胶，包括如下步骤：
将微小晶体颗粒分散到丙烯酸单体的水溶液中；
利用N-亚甲基双丙烯酰胺作交联剂，过硫酸钾作引发剂，采用水溶液聚合方法制备聚丙烯酸和微小晶体颗粒符合的导电水凝胶。
作为一种改进技术方案，所述导电水凝胶中还添加有量子点或荧光粉。
本发明还提供一种背光模组，所述背光模组为侧入式背光模组，该背光模组包括上述方案中的导光板。
与现有技术塑胶类的导光板相比较，本发明导光板采用主体为光学玻璃材料，在导光板的内部设置一个空腔，在空腔中填充导电水凝胶，利用导电水凝胶在未通电时为液体形态，通电后则变成胶体的特性，让导电凝水胶在液态和胶体态间转变，导电凝水胶中的微小晶体颗粒在电场的作用下发生偏转，光线通过固定偏转方向的晶体时发生旋光作用，使光线能够在胶体状态下的导光板中传输，而微小晶体颗粒则进一步增强对光的反射和满反射功能，让更多的光线穿透，从而提高光效；如在导电凝水胶中再加入量子点或者荧光粉材料，还可以进一步提高背光的超高色域，能使液晶显示装置的显示效果更好。
附图说明
图1是本发明导光板的立体结构原理示意图。
图2是本发明导光板的横截面结构原理示意图。
图3是本发明导光板的热量传输方向原理示意图。
图4是本发明导光板的光折射方向原理示意图。
图5是现有技术导光板的光折射方向原理示意图。
具体实施方式
为使本发明的目的、技术方案及优点更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
作为液晶显示模组的重要部件，背光模组的效果决定了液晶显示模组的显示效果，而导光板又是背光模组中的关键部件，导光板的导光效果直接决定了显示效果的高低。在侧入式背光模组中，传统导光板一般采用塑胶类材料，塑胶类导光效果不佳，且容易积聚热量，背光模组的热量无法有效散出，使得***的散热设计比较困难。本发明提出一种采用光学级别的玻璃材料作为导光板的主体材料，参见图1和图2，图1所示为本发明导光板的立体结构原理示意图，图2所示为本发明导光板的横截面结构原理示意图。结合图1和图2来看，本发明导光板10的主体为光学玻璃材料，导光板10内置空腔20，所述空腔20内填充导电水凝胶21，所述导光板两端设置有与空腔内导电水凝胶电连接的电极（图未示出），该导电水凝胶未通电时为液体形态，通电后则变成胶体形态。具体而言，水凝胶是一种微小晶体颗粒增强的杂化水凝胶，在所述导电水凝胶中添加微小晶体颗粒，可以增强导光板对于光的反射和漫反射功能。结合图4所示的本发明导光板的光折射方向原理示意图来看，光源60出光进入到导光板10后，导光板空腔20中的水凝胶21在通电后成为胶体形态，光在胶体导光板内进行传输时，遇到其中的微小晶体颗粒（图未示出），因该微小晶体颗粒具有反射光的作用，光线被微小晶体颗粒反射以及漫反射后再出光，这样使得更多的光能够穿透，从而大大提高导光板的光效。相比现有技术的导光板而言，如图5现有技术导光板的光折射方向原理示意图所示，光源60出光进入到导光板10’后，导光板10’对光的传输比较单一，也没有形成漫反射效果，光效较差。
另外，对于导光板而言，由于导光的功能，其同样需要进行散热的设计，而本发明导光板采用上述空腔中填充导电水凝胶的手段还可以进一步改善背光模组散热的问题。如图3本发明导光板的热量传输方向原理示意图所示，图3示出了导光板10配合光源60散热的情况，因水凝胶不仅具有高透光率，同时还具有热传导的功能，在导光板10通电水凝胶形成胶体形态开始工作后，水凝胶在光源出光受热后，还具有加速流动的特性，光源60发热后，导光板10近光源段的热量不断升高，导光板10的远光源端与近光源端形成温差，水凝胶受热后对流的流动性增强，将近光源端的热量不断向远光源端传输，使得本发明导光板的散热功能进一步得以加强，有效解决了背光模组的散热问题。
基于上述导电水凝胶的基础，如果要进一步提高背光的色域，还可以在所述导电水凝胶中添加量子点或荧光粉，以提高显示色域，实现超高色欲的画质效果。
本发明还提供一种上述导光板中导电水凝胶的制备方法，包括如下制备步骤：
将微小晶体颗粒分散到丙烯酸单体的水溶液中；
利用N-亚甲基双丙烯酰胺作交联剂，过硫酸钾作引发剂，采用水溶液聚合方法制备聚丙烯酸和微小晶体颗粒符合的导电水凝胶。
本发明还提供一种背光模组，该背光模组为侧入式背光模组，采用了上述的导光板来组成，导光板的具体功能与上述本发明导光板相同，此处不赘述。
应当理解的是，以上所述仅为本发明的较佳实施例而已，并不足以限制本发明的技术方案，对本领域普通技术人员来说，在本发明的精神和原则之内，可以根据上述说明加以增减、替换、变换或改进，而所有这些增减、替换、变换或改进后的技术方案，都应属于本发明所附权利要求的保护范围。

Claims (6)

1.一种导光板，其特征在于，所述导光板主体为光学玻璃材料，导光板内置空腔，所述空腔内填充导电水凝胶，所述导光板两端设置有与空腔内导电水凝胶电连接的电极；所述导电水凝胶未通电时为液体形态，当空腔内的导电水凝胶通电后变成胶体形态；其中，所述导电水凝胶中添加有微小晶体颗粒，以增强导光板对于光的反射和漫反射功能。
2.根据权利要求1所述的一种导光板，其特征在于，所述导电水凝胶中添加量子点或荧光粉，以提高显示色域。
3.一种导光板制备方法，用于制备权利要求1中所述的导光板，其特征在于，包括如下步骤：
将光学玻璃材料制成内置空腔的导光板主体；
将导电水凝胶填充至所述导光板主体内；
其中，所述导光板两端设置有与空腔内导电水凝胶电连接的电极；所述导电水凝胶未通电时为液体形态，当空腔内的导电水凝胶通电后变成胶体形态；所述导电水凝胶中添加有微小晶体颗粒，以增强导光板对于光的反射和漫反射功能。
4.根据权利要求3所述的导光板制备方法，其特征在于，所述导电水凝胶的制备方法包括如下步骤：
将微小晶体颗粒分散到丙烯酸单体的水溶液中；
利用N-亚甲基双丙烯酰胺作交联剂，过硫酸钾作引发剂，采用水溶液聚合方法制备聚丙烯酸和微小晶体颗粒符合的导电水凝胶。
5.根据权利要求4所述的一种导光板 的制备方法，其特征在于，所述导电水凝胶中还添加有量子点或荧光粉。
6.一种背光模组，所述背光模组为侧入式背光模组，其特征在于，该背光模组包括权利要求1至2任一项所述的导光板。
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