CN101295043A - 一种散光板结构及其制造方法 - Google Patents

一种散光板结构及其制造方法 Download PDF

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CN101295043A
CN101295043A CNA2007100987032A CN200710098703A CN101295043A CN 101295043 A CN101295043 A CN 101295043A CN A2007100987032 A CNA2007100987032 A CN A2007100987032A CN 200710098703 A CN200710098703 A CN 200710098703A CN 101295043 A CN101295043 A CN 101295043A
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于洪俊
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Abstract

本发明公开了一种散光板结构，包括：一基体；一抗粘层，形成于基体的一侧；一散光层，由聚合物树脂和聚合物空心微球组成，形成于基体的另一侧。其中，聚合物空心微球由外部聚合物和内部中空部分组成；内部中空部分的截面形状为圆形或椭圆形等形状；内部中空部分可以为一个或多个。本发明同时公开了一种散光板结构的制造方法，包括：将聚合物空心微球混入聚合物树脂中，搅拌均匀；再将混合均匀的聚合物空心微球的聚合物树脂均匀的涂布在基体上。本发明通过采用空心微球在散光层中产生光的全反射，使通过散光板的光线能量损失大大降低，能够提高背光源的亮度和光的均一性。

Description

一种散光板结构及其制造方法
技术领域
本发明涉及薄膜晶体管液晶显示器(TFT-LCD)的背光源，尤其涉及背光源结构中的散光板结构及其制造方法。
背景技术
由于液晶本身不发光，所以在液晶显示技术中需要利用附加的发光单元来增强显示屏的亮度，如今采用较为普遍的技术是带有散光板的背光源装置。散光板是背光源装置中重要的组成部分，对于散光板，它既需要有一定的对光的漫反射效果，同时需具有良好的均一性和透光度。
现有技术中，为了提高散光板的亮度和均一性，散光板多由一层透明树脂基板，和含有有机颗粒或无机颗粒的树脂层所组成。如美国专利6,602,596；5,831,774等，均采用粘合树脂将树脂颗粒粘合在基体上，形成具有三维结构的粗糙表面，从而提高浊度和散光性。
另外，在CN 1834756专利中提出了在基板中添加有机粒子或无机粒子，通过纵向和横向的拉伸，使得粒子周围产生孔隙，从而增加光的透射率和扩散性。
在基材表面添加有机或无机粒子，虽然可以增加光的散射，但是由于光在光程中，需不断地经过折射才能透过散光板，达到表面层，其中一部分的光能在折射过程中就被损失掉了，得到的光的透射率相对较低。
虽然CN1834756中所涉及的孔隙可以增加光的透射率，因为孔隙的存在，当光线从折射率高的进入到折射率较低的物质中时，容易发生全反射现象，从而降低了光能的损失。但是孔隙的大小受到基体与树脂之间的界面张力及拉伸作用力大小的不同而不易得到控制，所以制作精度上不能满足要求，得到的光的均一性不足。
发明内容
本发明的目的是针对现有技术的缺陷，提供一种散光板结构，该散光板通过采用空心微球在散光层中产生光的全反射，使通过散光板的光线能量损失大大降低，能够提高背光源的亮度和光的均一性。
为了实现上述目的，本发明提供一种散光板结构，包括：一基体；一抗粘层，形成于基体的一侧；一散光层，由聚合物树脂和聚合物空心微球组成，形成于基体的另一侧。
上述方案中，所述散光层的厚度为25-50um。所述聚合物空心微球由外部聚合物和内部中空部分组成。其中，外部聚合物的截面形状为圆形或椭圆形等形状；内部中空部分的截面形状为圆形或椭圆形等形状；且内部中空部分可以为一个或多个；当中空部分为多个时，多个中空部分的截面形状可以相同或不同。
为了实现上述目的，本发明同时提供一种散光板结构的制造方法，，包括：
步骤1，制备聚合物空心微球；
步骤2，将聚合物空心微球混入聚合物树脂中，搅拌均匀；
步骤3，将混合均匀的聚合物空心微球的聚合物树脂均匀的涂布在基体上；
步骤4，通过进一步处理使聚合物树脂固化；
步骤5，在基体的另一侧贴附或涂布抗粘层。
相对于现有技术，本发明由于采用了空心微球，在散光层中产生光的全反射，使通过散光板的光线能量损失大大降低，从而提高了背光源的亮度，同时光线具有较好的均匀性。
下面结合附图和具体实施例对本发明进行进一步更为详细地说明。
附图说明
图1是本发明的散光板结构截面示意图；
图2是本发明的聚合物空心微球结构的截面图之一；
图3是本发明的聚合物空心微球结构的截面图之二；
图4是本发明的聚合物空心微球结构的截面图之三；
图5是本发明的聚合物空心微球结构的截面图之四。
图中标记：1、抗粘层；2、基体；3、聚合物树脂；4、聚合物空心微球；5、空心微球外部聚合物；6、空心微球内部中空部分。
具体实施方式
图1所示为本发明的散光板结构截面示意图。如图1所示，本发明的散光板结构为三层复合结构，中间一层为基体2，在基体2的一侧是为聚合物树脂3和聚合物空心微球4组成的厚度为25-50um的散光层，在基体的另一侧为抗粘层1。其中聚合物空心微球的外部聚合物呈为圆形、椭圆形等结构；内部中空部分呈圆形、椭圆形或其他规则或不规则结构，中空部分的数量即可以为一个，也可以为多个，多个中空部分的结构可以相同也可不同。下面结合附图说明聚合物空心微球的结构。
图2所示为本发明的聚合物空心微球结构的截面图之一。如图2所示，该聚合物空心微球由空心微球外部聚合物5和空心微球内部中空部分6构成，其中空心微球外部聚合物5和空心微球内部中空部分6的截面均呈椭圆形。
图3所示为本发明的聚合物空心微球结构的截面图之二。如图3所示，空心微球外部聚合物5的截面呈圆形，而空心微球内部中空部分6的截面均呈椭圆形。
图4所示为本发明的聚合物空心微球结构的截面图之三。如图3所示，该聚合物空心微球由空心微球外部聚合物5和4个空心微球内部中空部分6构成，且空心微球外部聚合物5和空心微球内部中空部分6的截面均呈圆形。
图5所示为本发明的聚合物空心微球结构的截面图之四。如图4所示，该聚合物空心微球由空心微球外部聚合物5和3个空心微球内部中空部分6构成，其中空心微球外部聚合物5截面均呈圆形，而3个空心微球内部中空部分6中，1个截面呈椭圆形，2个截面呈圆形。
上述附图仅用以说明本发明的聚合物空心结构可进行多种形式的变换，不应该视为对本发明的限制。
通常，当光从光密物质向光疏物质传播时，在光密物质和光疏物质的界面上会发生全反射。本发明的空心微球结构，外部的聚合物相对于内部的中空来说是光密物质，内部中空就是光疏物质，当背光源的光通过基材到达聚合物空心微球时，大部分的光在聚合物空心表面会发生全反射，使得大部分的光通过扩散板，从而通过散光板的光能损失大大降低，提高了背光源的亮度；同时空心微球具有一定的粒径分布，其光线具有较好的均匀性。
本发明的散光板结构可以通过如下方法来制备。
步骤1，制备聚合物空心微球4；
步骤2，将聚合物空心微球4混入聚合物树脂3中，搅拌均匀；
步骤3，将混合均匀的聚合物空心微球的聚合物树脂均匀的涂布在基体2上；
步骤4，通过进一步处理使聚合物树脂固化；
步骤5，在基体2的另一侧贴附或涂布抗粘层。
由上述方法制备而成的散光板，由于采用了聚合物空心微球作为光的散射的主要材料，因此提高了散射板的光的透过率，从而减少了光损失，提高了背光源光的利用率，从而降低了背光源的功耗(相同亮度下)。
最后应说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，按照需要可使用不同材料和设备实现之，即可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的精神和范围。

Claims (10)

1、一种散光板结构，包括：一基体；一抗粘层，形成于基体的一侧；其特征在于：一散光层，由聚合物树脂和聚合物空心微球组成，形成于基体的另一侧。
2、根据权利要求1所述的散光板结构，其特征在于：所述散光层的厚度为25-50um。
3、根据权利要求1或2所述的散光板结构，其特征在于：所述聚合物空心微球由外部聚合物和内部中空部分组成。
4、根据权利要求3所述的散光板结构，其特征在于：所述外部聚合物的截面形状为圆形或椭圆形。
5、根据权利要求3所述的散光板结构，其特征在于：所述内部中空部分的截面形状为圆形或椭圆形。
6、根据权利要求3所述的散光板结构，其特征在于：所述内部中空部分为一个。
7、根据权利要求3所述的散光板结构，其特征在于：所述内部中空部分为多个。
8、根据权利要求7所述的散光板结构，其特征在于：所述多个中空部分的截面形状相同。
9、根据权利要求7所述的散光板结构，其特征在于：所述多个中空部分的截面形状不同。
10、一种散光板结构的制造方法，其特征在于，包括：
步骤1，制备聚合物空心微球；
步骤2，将聚合物空心微球混入聚合物树脂中，搅拌均匀；
步骤3，将混合均匀的聚合物空心微球的聚合物树脂均匀的涂布在基体上；
步骤4，聚合物树脂固化；
步骤5，在基体的另一侧贴附或涂布抗粘层。
CNA2007100987032A 2007-04-25 2007-04-25 一种散光板结构及其制造方法 Pending CN101295043A (zh)

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CN114924338A (zh) * 2022-06-13 2022-08-19 深圳市兆驰光元科技有限公司 一种扩散膜及背光模组

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CN114924338A (zh) * 2022-06-13 2022-08-19 深圳市兆驰光元科技有限公司 一种扩散膜及背光模组
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