CN105700237A - 快速响应液晶显示装置及其制作方法 - Google Patents

快速响应液晶显示装置及其制作方法 Download PDF

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CN105700237A
CN105700237A CN201610230831.7A CN201610230831A CN105700237A CN 105700237 A CN105700237 A CN 105700237A CN 201610230831 A CN201610230831 A CN 201610230831A CN 105700237 A CN105700237 A CN 105700237A
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liquid crystal
polymerisable monomer
display device
crystal display
red
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韦宏权
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US15/112,194 priority patent/US9965072B1/en
Priority to PCT/CN2016/082673 priority patent/WO2017177506A1/zh
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Abstract

本发明提供一种快速液晶显示装置及其制作方法。该液晶显示装置设置场序背光模组来实现彩色显示，去除了传统液晶显示面板中的彩色滤光片，从而具有高透光率、高色纯度；在液晶显示面板(2)中设置聚合物液晶层(28)，所述聚合物液晶层(28)包括由可聚合单体经聚合反应形成的聚合物网络(281)、及受所述聚合物网络(281)锚定在不加电状态下维持弯曲态，在加电状态下呈垂直态的液晶(282)，省略了现有OCB模式的“热机”过程，从而大幅加快了响应速度。

Description

快速响应液晶显示装置及其制作方法
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种快速响应液晶显示装置及其制造方法。
背景技术
液晶显示装置(LiquidCrystalDisplay，LCD)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用。如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等，在平板显示领域中占主导地位。
液晶显示装置通常包括壳体、设于壳体内的液晶显示面板及设于壳体内的背光模组。
传统的液晶显示面板由一彩色滤光片基板(ColorFilter，CF)、一薄膜晶体管阵列基板(ThinFilmTransistorArraySubstrate，TFTArraySubstrate)以及一填充于两基板间的液晶层(LiquidCrystalLayer)所构成。传统的液晶显示装置实现彩色显示的做法是使用涂布了红色、绿色、蓝色等彩色色阻的彩色滤光片来过滤背光模组提供的单色光(通常为白光)。通常设置红、绿、蓝三个子像素构成一个像素，由于彩色光阻的滤光性，彩色滤光片只能允许1/3的光透过，极大的损失了液晶显示面板的透光率。
另一种实现彩色显示的方法是去除液晶显示面板中的彩色滤光片，而使用场序显示模式的背光模组。场序模式的背光模组一般由红、绿、蓝三组LED背光源组成，背光源发出的光按照时间顺序依次循坏切换红、绿、蓝三种颜色光；与此同时，对应的像素通过液晶实现透光率的变化，利用人眼视网膜的停留效应，将颜色按照时间混合，从而实现彩色显示。场序显示不需要使用彩色滤光片，可以实现高透光率的显示，同时彩色直接由背光源合成，色纯度会更高，但是，场序显示模式的频率会比传统的液晶显示至少快3倍，所以对液晶的响应速度要求非常高。
还有一种称作光学补偿弯曲排列(OpticallyCompensatedBirefringence，OCB)的显示模式，响应速度较快，但是OCB模式需要一个十分缓慢的“热机”过程，从而限制了其在场序显示装置上的应用。如图1所示，OCB模式的“热机”过程缓慢是由于当对液晶层100施加电场时，液晶分子101首先需要从展曲态(Splay)转变到不规则展曲态(AsymmetricSplay)、再转变到弯曲态(Bend)，而真正OCB模式的有效工作过程需要液晶分子101在弯曲态与垂直态(Homeotropic)之间互相转变。
发明内容
本发明的目的在于提供一种液晶显示装置，能够使液晶分子维持在弯曲态，加快响应速度，且具有高透光率、高色纯度。
本发明的另一目的在于提供一种液晶显示装置的制作方法，由该方法制作的液晶显示装置能够使液晶分子维持在弯曲态，加快响应速度，且具有高透光率、高色纯度。
为实现上述目的，本发明首先提供一种液晶显示装置，包括：场序背光模组、及设于所述场序背光模组上的液晶显示面板；
所述液晶显示面板包括上基板、与上基板相对设置的下基板、分别设在上基板与下基板相对内侧的上配向膜与下配向膜、分别贴附在上基板与下基板相对外侧的上偏光片与下偏光片、以及配置在上配向膜与下配向膜之间的聚合物液晶层；所述聚合物液晶层包括由可聚合单体经聚合反应形成的聚合物网络、及受所述聚合物网络锚定在不加电状态下维持弯曲态，在加电状态下呈垂直态的液晶；
所述场序背光模组至少包括红、绿、蓝三色LED灯组，所述红、绿、蓝三色LED灯组按场序交替循环发光。
所述可聚合单体未发生聚合反应之前占其与液晶的组合物的重量比为0.1％～40％。
所述可聚合单体具有一个或多个不饱和双键官能团；所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或多种的组合。
场序背光模组驱动红、绿、蓝三色LED灯组的频率为120HZ或240HZ；红、绿、蓝三色LED灯组按照红色LED灯、绿色LED灯、蓝色LED灯的次序进行重复排列或者按照红色LED灯、绿色LED灯、红色LED灯、蓝色LED灯的次序进行重复排列。
所述液晶为向列型液晶。
本发明还提供一种快速响应液晶显示装置的制作方法，包括如下步骤：
步骤1、提供上基板与下基板，在所述上基板与下基板的相对内侧分别涂布并固化上配向膜与下配向膜，再对上配向膜与下配向膜进行摩擦配向或光配向；
步骤2、混合可聚合单体与液晶，得到可聚合单体与液晶的组合物；
步骤3、在所述上基板或下基板上涂布框胶，将可聚合单体与液晶的组合物滴入框胶围成的空间内，然后将上基板与下基板组立贴合，进行框胶固化；
步骤4、施加电压，使可聚合单体与液晶的组合物中的液晶从展曲态转变成弯曲态，稳定后，照射紫外光使可聚合单体发生聚合反应形成聚合物网络来锚定液晶；
步骤5、切割裂片后，在所述上基板与下基板的相对外侧分别贴附上偏光片与下偏光片，制得液晶显示面板；
步骤6、提供场序背光模组，装配所述液晶显示面板与场序背光模组制得液晶显示装置；
所述场序背光模组至少包括红、绿、蓝三色LED灯组，所述红、绿、蓝三色LED灯组按场序交替循环发光。
所述步骤2中可聚合单体占可聚合单体与液晶的组合物的重量比为0.1％～40％。
所述可聚合单体具有一个或多个不饱和双键官能团；所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或多种的组合。
所述步骤4中紫外光的光波段为280～400nm。
所述液晶为向列型液晶。
本发明的有益效果：本发明提供的液晶显示装置，设置场序背光模组来实现彩色显示，去除了传统液晶显示面板中的彩色滤光片，从而具有高透光率、高色纯度；在液晶显示面板中设置聚合物液晶层，所述聚合物液晶层包括由可聚合单体经聚合反应形成的聚合物网络、及受所述聚合物网络锚定在不加电状态下维持弯曲态，在加电状态下呈垂直态的液晶，省略了现有OCB模式的“热机”过程，从而大幅加快了响应速度。本发明提供的液晶显示装置的制作方法，在液晶显示面板制作过程中使可聚合单体与液晶的组合物中的液晶从展曲态转变成弯曲态并稳定后，照射紫外光使可聚合单体发生聚合反应形成聚合物网络来锚定液晶，且采用场序背光模组搭配液晶显示面板，最终制得的液晶显示装置能够使液晶分子维持在弯曲态，加快响应速度，且具有高透光率、高色纯度。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为现有的OCB显示模式工作过程中液晶分子的状态变化示意图；
图2为本发明的快速响应液晶显示装置的结构示意图；
图3为本发明的快速响应液晶显示装置中的液晶显示面板加电前后的对比示意图；
图4为本发明的快速响应液晶显示装置的制作方法的流程图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请同时参阅图2与图3，本发明首先提供一种快速响应液晶显示装置，包括：场序背光模组1、及设于所述场序背光模组1上的液晶显示面板2。
所述场序背光模组1至少包括红、绿、蓝三色LED灯组，所述红、绿、蓝三色LED灯组按场序交替循环发光。当然，在红、绿、蓝三色LED灯组的基础上还可增加白色LED灯组、黄色LED灯组、或青色LED灯组。
所述液晶显示面板2包括上基板21、与上基板21相对设置的下基板22、分别设在上基板21与下基板22相对内侧的上配向膜23与下配向膜24、分别贴附在上基板21与下基板22相对外侧的上偏光片25与下偏光片26、以及配置在上配向膜23与下配向膜24之间的聚合物液晶层28。所述聚合物液晶层28包括由可聚合单体经聚合反应形成的聚合物网络281、及受所述聚合物网络281锚定在不加电状态下维持弯曲态，在加电状态下呈垂直态的液晶282。
具体地，以所述场序背光模组1包括红、绿、蓝三色LED灯组为例，如图2所示，红、绿、蓝三色LED灯组按照红色LED灯R、绿色LED灯G、蓝色LED灯B的次序进行重复排列，或者按照红色LED灯R、绿色LED灯G、红色LED灯R、蓝色LED灯B的次序进行重复排列(未图示)。每一种颜色LED灯组的发光周期需小于或等于人眼的视觉残留时间，才可以在人们的大脑中形成一个彩色的图像，视觉残留时间实际上为六十分之一秒，因此设置所述场序背光模组1驱动红、绿、蓝三色LED灯组的频率为120HZ或240HZ，即能通过该场序背光模组1来实现彩色显示。
所述下基板22等同于现有技术中的TFT阵列基板。由于本发明的快速响应液晶显示装置通过所述序背光模组1来实现彩色显示，所述上基板21与现有技术相比无需设置彩色光阻，去除了传统液晶显示面板中的彩色滤光片，从而该快速响应液晶显示装置具有高透光率、高色纯度。
所述液晶282优选向列型液晶。向列型液晶的分子呈棒状，分子的质心有长程的有序性，分子排列方式如同一把筷子，上下方向排列整齐，但沿前后左右方向排列可以变动并不规则，在自由状态下呈展曲态，在加电状态下可由展曲态转变成弯曲态。
所述可聚合单体未发生聚合反应之前占其与液晶282的组合物的重量比为0.1％～40％。进一步地，所述可聚合单体具有一个或多个不饱和双键官能团；所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或多种的组合。
所述可聚合单体经聚合反应形成的聚合物网络281对液晶282具有强的锚定力，能够使液晶282在不加电状态下维持弯曲态。对本发明的液晶显示装置在不加电和加电之间切换，就能够使得液晶282直接由弯曲态转变为垂直态，与现有的OCB显示模式相比，省略了使液晶从展曲态转变到不规则展曲态、再转变到弯曲态的缓慢的“热机”过程，大幅加快了响应速度。
本发明的快速响应液晶显示装置的工作过程为：在一帧画面的第一场序中，场序背光模组1驱动红色LED灯R、绿色LED灯G、与蓝色LED灯B的其中一种，发出对应颜色的光，同时对应的TFT开关受到驱动，向对应像素中充入所需要的电压，液晶282快速响应，对应像素便能够达到目标亮度值；同理，在一帧画面的第二场序、第三场序中，场序背光模组1分别发出剩余的两种颜色的光的一种，利用人眼的视觉残留效应，混色形成所需要显示的彩色图像。
请参阅图4，结合图2与图3，本发明还提供一种快速响应液晶显示装置的制作方法，包括如下步骤：
步骤1、提供上基板21与下基板22，在所述上基板21与下基板22的相对内侧分别涂布并固化上配向膜23与下配向膜24，再对上配向膜23与下配向膜24进行摩擦(Rubbing)配向或光配向。
该步骤1对上配向膜23与下配向膜24进行摩擦配向能够对后续步骤滴入的液晶做水平配向，使得液晶具有2～30度的预倾角。
具体地，所述下基板22等同于现有技术中的TFT阵列基板。所述上基板21与现有技术相比无需设置彩色光阻，使得最终制得的快速响应液晶显示装置具有高透光率、高色纯度。
步骤2、混合可聚合单体与液晶282，得到可聚合单体与液晶282的组合物。
具体地，所述步骤2中可聚合单体占可聚合单体与液晶282的组合物的重量比为0.1％～40％。进一步地，所述可聚合单体具有一个或多个不饱和双键官能团；所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或多种的组合。
所述液晶282为向列型液晶。向列型液晶的分子呈棒状，分子的质心有长程的有序性，分子排列方式如同一把筷子，上下方向排列整齐，但沿前后左右方向排列可以变动并不规则，在自由状态下呈展曲态，在加电状态下可由展曲态转变成弯曲态。
步骤3、在所述上基板21或下基板22上涂布框胶，将可聚合单体与液晶282的组合物滴入框胶围成的空间内，然后将上基板21与下基板22组立贴合，进行框胶固化。
具体地，该步骤3滴入可聚合单体与液晶282的组合物后形成的液晶盒厚为1～20um。
步骤4、施加电压，使可聚合单体与液晶282的组合物中的液晶282从展曲态转变成弯曲态，稳定后，照射紫外光使可聚合单体发生聚合反应形成聚合物网络281来锚定液晶282。
具体地，该步骤4中紫外光的光波段为280～400nm。
步骤5、切割裂片后，在所述上基板21与下基板22的相对外侧分别贴附上偏光片25与下偏光片26，制得液晶显示面板2。
步骤6、提供场序背光模组1，装配所述液晶显示面板2与场序背光模组1制得液晶显示装置。
所述场序背光模组1至少包括红、绿、蓝三色LED灯组，所述红、绿、蓝三色LED灯组按场序交替循环发光。
上述方法制得的液晶显示装置，其液晶显示面板2中的聚合物液晶层28包括了聚合物网络281、及液晶282，聚合物网络281对液晶282具有强的锚定力，能够使液晶282在不加电状态下维持弯曲态，对制得的液晶显示装置在不加电和加电之间切换，就能够使得液晶282直接由弯曲态转变为垂直态，与现有的OCB显示模式相比，省略了使液晶从展曲态转变到不规则展曲态、再转变到弯曲态的缓慢的“热机”过程，大幅加快了响应速度。
另外，制得的液晶显示装置通过所述序背光模组1来实现彩色显示，所述上基板21与现有技术相比无需设置彩色光阻，去除了传统液晶显示面板中的彩色滤光片，从而该液晶显示装置具有高透光率、高色纯度。
综上所述，本发明的液晶显示装置，设置场序背光模组来实现彩色显示，去除了传统液晶显示面板中的彩色滤光片，从而具有高透光率、高色纯度；在液晶显示面板中设置聚合物液晶层，所述聚合物液晶层包括由可聚合单体经聚合反应形成的聚合物网络、及受所述聚合物网络锚定在不加电状态下维持弯曲态，在加电状态下呈垂直态的液晶，省略了现有OCB模式的“热机”过程，从而大幅加快了响应速度。本发明的液晶显示装置的制作方法，在液晶显示面板制作过程中使可聚合单体与液晶的组合物中的液晶从展曲态转变成弯曲态并稳定后，照射紫外光使可聚合单体发生聚合反应形成聚合物网络来锚定液晶，且采用场序背光模组搭配液晶显示面板，最终制得的液晶显示装置能够使液晶分子维持在弯曲态，加快响应速度，且具有高透光率、高色纯度。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (10)

1.一种快速响应液晶显示装置，其特征在于，包括：场序背光模组(1)、及设于所述场序背光模组(1)上的液晶显示面板(2)；
所述液晶显示面板(2)包括上基板(21)、与上基板(21)相对设置的下基板(22)、分别设在上基板(21)与下基板(22)相对内侧的上配向膜(23)与下配向膜(24)、分别贴附在上基板(21)与下基板(22)相对外侧的上偏光片(25)与下偏光片(26)、以及配置在上配向膜(23)与下配向膜(24)之间的聚合物液晶层(28)；所述聚合物液晶层(28)包括由可聚合单体经聚合反应形成的聚合物网络(281)、及受所述聚合物网络(281)锚定在不加电状态下维持弯曲态，在加电状态下呈垂直态的液晶(282)；
所述场序背光模组(1)至少包括红、绿、蓝三色LED灯组，所述红、绿、蓝三色LED灯组按场序交替循环发光。
2.如权利要求1所述的快速响应液晶显示装置，其特征在于，所述可聚合单体未发生聚合反应之前占其与液晶(282)的组合物的重量比为0.1％～40％。
3.如权利要求2所述的快速响应液晶显示装置，其特征在于，所述可聚合单体具有一个或多个不饱和双键官能团；所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或多种的组合。
4.如权利要求1所述的快速响应液晶显示装置，其特征在于，场序背光模组(1)驱动红、绿、蓝三色LED灯组的频率为120HZ或240HZ；红、绿、蓝三色LED灯组按照红色LED灯(R)、绿色LED灯(G)、蓝色LED灯(B)的次序进行重复排列或者按照红色LED灯(R)、绿色LED灯(G)、红色LED灯(R)、蓝色LED灯(B)的次序进行重复排列。
5.如权利要求1所述的快速响应液晶显示装置，其特征在于，所述液晶(282)为向列型液晶。
6.一种快速响应液晶显示装置的制作方法，其特征在于，包括如下步骤：
步骤1、提供上基板(21)与下基板(22)，在所述上基板(21)与下基板(22)的相对内侧分别涂布并固化上配向膜(23)与下配向膜(24)，再对上配向膜(23)与下配向膜(24)进行摩擦配向或光配向；
步骤2、混合可聚合单体与液晶(282)，得到可聚合单体与液晶(282)的组合物；
步骤3、在所述上基板(21)或下基板(22)上涂布框胶，将可聚合单体与液晶(282)的组合物滴入框胶围成的空间内，然后将上基板(21)与下基板(22)组立贴合，进行框胶固化；
步骤4、施加电压，使可聚合单体与液晶(282)的组合物中的液晶(282)从展曲态转变成弯曲态，稳定后，照射紫外光使可聚合单体发生聚合反应形成聚合物网络(281)来锚定液晶(282)；
步骤5、切割裂片后，在所述上基板(21)与下基板(22)的相对外侧分别贴附上偏光片(25)与下偏光片(26)，制得液晶显示面板(2)；
步骤6、提供场序背光模组(1)，装配所述液晶显示面板(2)与场序背光模组(1)制得液晶显示装置；
所述场序背光模组(1)至少包括红、绿、蓝三色LED灯组，所述红、绿、蓝三色LED灯组按场序交替循环发光。
7.如权利要求6所述的快速响应液晶显示装置的制作方法，其特征在于，所述步骤2中可聚合单体占可聚合单体与液晶(282)的组合物的重量比为0.1％～40％。
8.如权利要求7所述的快速响应液晶显示装置的制作方法，其特征在于，所述可聚合单体具有一个或多个不饱和双键官能团；所述可聚合单体为丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂的一种或多种的组合。
9.如权利要求6所述的快速响应液晶显示装置的制作方法，其特征在于，所述步骤4中紫外光的光波段为280～400nm。
10.如权利要求6所述的快速响应液晶显示装置的制作方法，其特征在于，所述液晶(282)为向列型液晶。
CN201610230831.7A 2016-04-13 2016-04-13 快速响应液晶显示装置及其制作方法 Pending CN105700237A (zh)

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