CN104965359B - 多重稳态液晶显示面板 - Google Patents

多重稳态液晶显示面板 Download PDF

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CN104965359B
CN104965359B CN201510427293.6A CN201510427293A CN104965359B CN 104965359 B CN104965359 B CN 104965359B CN 201510427293 A CN201510427293 A CN 201510427293A CN 104965359 B CN104965359 B CN 104965359B
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liquid crystal
substrate
molecule
display panel
crystal display
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CN104965359A (zh
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钟新辉
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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 PCT/CN2015/087671 priority patent/WO2017012161A1/zh
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Abstract

本发明提供一种多重稳态液晶显示面板，在第一基板(10)靠近液晶层(30)的一侧设置第一平面电极(11)与相互间隔的数个水平电极(13)，在第二基板(20)靠近液晶层(30)的一侧设置第二平面电极(21)；液晶层(30)包括多个正性液晶分子(31)和双极性低分子量的配向分子(32)，无需采用PI材料对液晶分子进行水平或垂直配向，通过调整施加于第一平面电极(11)与第二平面电极(21)之间的电压、施加于任意两个水平电极(13)之间的电压中的一种或两种，使得正性液晶分子(31)在配向分子(32)的配向作用下以一特定角度排列，之后撤去电压，正性液晶分子(31)仍能保持施加电压时的状态，实现多重现稳态显示，节能。

Description

多重稳态液晶显示面板
技术领域
本发明涉及显示技术领域，尤其涉及一种多重稳态液晶显示面板。
背景技术
主动式薄膜晶体管液晶显示器(Thin Film Transistor-LCD，TFT-LCD)近年来得到了飞速的发展和广泛的应用，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。
就目前主流市场上的TFT-LCD显示面板而言，可分为三大类：扭曲向列(TwistedNematic，TN)或超扭曲向列(Super Twisted Nematic，STN)型、平面转换(In-PlaneSwitching，IPS)型、及垂直配向(Vertical Alignment，VA)型。它们均具有较好的显示效果，在各种场合被大量应用。除了这三种类型的液晶显示面板之外，还存在一些其他模式的液晶显示面板，比如光学弯曲补偿(Optically Compensated Bend，OCB)模式、聚合物分散液晶(Polymer Dispersed Liquid Crystal，PDLC)模式等。
通常，液晶显示面板的结构是由一彩色滤光片基板(Color Filter，CF)、一薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)以及一配置于两基板间的液晶层(Liquid Crystal Layer)所构成，其工作原理是通过在两基板上施加驱动电压来控制液晶层的液晶分子的旋转，将背光模组的光线折射出来产生画面；并且多数的液晶显示面板均需要聚酰亚胺(PI)材料作为配向膜涂布于两基板的最内侧与液晶层接触，使液晶分子垂直或平行于基板表面排列，而没有PI材料时，液晶分子直接与基板表面的电极或无机绝缘层如氮化硅(SiNx)等接触，这些类型的表面只能使液晶分子平行于基板表面排列。
现有的液晶显示面板中，绝大部分均为电压器件，改变与维持显示状态，均需要电压变化与持续电压供应，一旦电压撤去(电压为0)则其显示为0电压的状态，而不能保持其之前非0电压的显示状态，换言之，目前绝大多数主流液晶显示面板不具有多重稳态的显示特征，即使在画面为静态、不需改变的情况下，仍然需要持续电压供应以维持其显示状态，由此会造成较大的能量损耗，尤其在可移动设备显示应用中会造成对电池的高要求或者导致电池续航时间变短。而具有多重稳态显示效果的电子墨水显示面板(目前电子书所用的主流显示面板)在稳态显示时不需要持续电压供应，只有在刷新画面时才需要供电，所以其在耗电量与电池续航能力上相对液晶显示面板具有极大的优势，但其不足之处在于显示效果较差，分辨率、色彩鲜艳度等均不及液晶显示面板的显示效果。
发明内容
本发明的目的在于提供一种多重稳态液晶显示面板，能够使液晶显示面板在显示静态画面时不需要持续供电，从而降低能耗，提高移动显示设备的电池续航能力。
为实现上述目的，本发明提供了一种多重稳态液晶显示面板，包括第一基板、与所述第一基板相对设置的第二基板、夹设于所述第一基板与第二基板之间的液晶层、于所述第一基板靠近液晶层一侧覆盖该第一基板的第一平面电极、覆盖所述第一平面电极的绝缘层、设于所述绝缘层上相互间隔的数个水平电极、及于所述第二基板靠近液晶层一侧覆盖该第二基板的第二平面电极；
所述液晶层包括多个正性液晶分子和双极性低分子量的配向分子；
通过调整施加于所述第一平面电极与第二平面电极之间的电压、施加于任意两个水平电极之间的电压中的一种或两种，使得所述正性液晶分子在双极性低分子量的配向分子的配向作用下以一特定角度排列，之后撤去电压，正性液晶分子仍能保持施加电压时的状态，从而实现多重稳态显示。
所述双极性低分子量的配向分子占液晶层重量百分比0.02％-5％。
所述双极性低分子量的配向分子的分子量范围为100-1000。
所述双极性低分子量的配向分子的结构通式为：
其中，H为苯环结构；
L1、L2、L3为苯环或饱和六元环结构；
h1与h2为连接于苯环H上的取代基团；m为h1或h2的个数，取值范围为0～2；h1为包含可聚合基团的取代基，所述可聚合基团选自取代或未取代的甲基丙烯酸酯基、丙烯酸酯基、环氧基、乙烯基、乙烯氧基、乙炔基、与丁二烯基；h2为含杂原子基团的极性基团，所述杂原子基团的数目为1～4个，选自如下基团：-OH、-SH、-NH2、-O-、-S-、-NHR、-NH-、-NR2、-NR-、中的一种或多种；
a为分别连接于L1、L2、或L3上的取代基团；n为a的数目，取值范围为0～4；a选自H、F、Cl、Br、CN、包含1-10个碳原子的直链或支链烷基中的一种；
T为尾端基团，所述尾端基团为包含1～25个碳原子的分子链。
所述绝缘层的材料为氮化硅、氧化硅或二者的组合。
所述第一平面电极、第二平面电极、及数个水平电极的材料为ITO。
所述第一基板与第二基板的其中一个为TFT基板，另一个为CF基板。
所述水平电极的数量为两个。
本发明的有益效果：本发明提供的一种多重稳态液晶显示面板，在第一基板靠近液晶层的一侧设置第一平面电极与相互间隔的数个水平电极，在第二基板靠近液晶层的一侧设置第二平面电极；所述液晶层包括多个正性液晶分子和双极性低分子量的配向分子，无需采用PI材料对液晶分子进行水平或垂直配向，通过控制双极性低分子量的配向分子在液晶层中的含量，使液晶分子的配向状况处于一种临界状态，既不会具有很强的垂直配向性也不会具有很强的水平配向性，其排列状况极易受外界电场影响，通过调整施加于所述第一平面电极与第二平面电极之间的电压、施加于任意两个水平电极之间的电压中的一种或两种，使得所述正性液晶分子在双极性低分子量的配向分子的配向作用下以一特定角度排列，之后撤去电压，正性液晶分子仍能保持施加电压时的状态，从而实现多重现稳态显示，使液晶显示面板在显示静态画面时不需要持续供电，降低能耗，提高移动显示设备的电池续航能力。
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。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其它有益效果显而易见。
附图中，
图1为本发明的多重稳态液晶显示面板的立体结构示意图；
图2为本发明的多重稳态液晶显示面板在两平面电极之间施加电压时的剖面示意图；
图3为本发明的多重稳态液晶显示面板在两水平电极之间施加电压时的剖面示意图。
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。
请参阅图1，本发明提供一种多重稳态液晶显示面板，包括第一基板10、与所述第一基板10相对设置的第二基板20、夹设于所述第一基板10与第二基板20之间的液晶层30、于所述第一基板10靠近液晶层30一侧覆盖该第一基板10的第一平面电极11、覆盖所述第一平面电极11的绝缘层12、设于所述绝缘层12上相互间隔的数个水平电极13、及于所述第二基板20靠近液晶层30一侧覆盖该第二基板20的第二平面电极21。
所述液晶层30的主体部分为多个正性液晶分子31，所述液晶层30还包括一定比例的双极性低分子量的配向分子32。所述双极性低分子量的配向分子32的分子量范围为100-1000，进一步地，所述双极性低分子量的配向分子32的结构通式为：
其中，H为苯环结构；
L1、L2、L3为苯环或饱和六元环结构；
h1与h2为连接于苯环H上的取代基团；m为h1或h2的个数，取值范围为0～2；h1为包含可聚合基团的取代基，所述可聚合基团可选自取代或未取代的甲基丙烯酸酯基、丙烯酸酯基、环氧基、乙烯基、乙烯氧基、乙炔基、与丁二烯基等；h2为含杂原子基团的极性基团，所述杂原子基团的数目为1～4个，可选自如下基团：-OH、-SH、-NH2、-O-、-S-、-NHR、-NH-、-NR2、-NR-、中的一种或多种；
a为分别连接于L1、L2、或L3上的取代基团；n为a的数目，取值范围为0～4；a可为H、F、Cl、Br、CN、包含1-10个碳原子的直链或支链烷基中的一种；
T为尾端基团，所述尾端基团为包含1～25个碳原子的分子链，其中可包含-O-、-COO-、-OCO-、-CH2O-、-OCH2O-、-O(CH2)2O-、-COCH2-等取代基。
例如，所述双极性低分子量的配向分子32的一种结构式为：
另一种结构式为：
所述第一基板10与第二基板20的其中一个为TFT基板，另一个为CF基板。TFT基板与CF基板的具体结构为现有技术，此处不再展开叙述。
所述绝缘层12的材料为氮化硅(SiNx)、氧化硅(SiOx)或二者的组合。
所述第一平面电极11、第二平面电极21、及数个水平电极13的材料为氧化铟锡(Indium Tin Oxide，ITO)。
所述数个水平电极13排列成梳形，图1示意出了水平电极13的数量为两个，当然水平电极13的数量还可以更多。
特别需要说明的是，如图1所示，本发明的液晶显示面板无需采用PI材料对液晶分子进行水平或垂直配向，即没有PI材料作为配向膜涂布于两基板的相对内侧与液晶分子接触，所述双极性低分子量的配向分子32既具有与第一基板10及第二基板20的强结合力，又能够使正性液晶分子31按垂直于第一基板10及第二基板20表面的方向排列。所述双极性低分子量的配向分子32使正性液晶分子31垂直排列的能力与其在液晶层30中的含量相关，含量越多则使正性液晶分子31垂直排列配向的能力越强。而当所述双极性低分子量的配向分子32在液晶层30中的含量在某一范围时，可使正性液晶分子31的配向状况处于一种临界状态，既不会具有很强的垂直配向性也不会具有很强的水平配向性，其最终排列状况极易受外界电场影响，一旦外界电场消失，在既没有电场作用又没有极强的配向力作用的情况下，所述正性液晶分子31倾向于保持原来的配向状态不变。由于所述双极性低分子量的配向分子32多种多样，配向力、分子量等等均存在差异，所以使正性液晶分子31的配向状况处于上述临界状态的双极性低分子量的配向分子32在液晶层30中的含量并不固定，一般占液晶层重量百分比的0.02％-5％，最优为0.1％-2％。
本发明的液晶显示面板进行显示时，通过调整施加于所述第一平面电极11与第二平面电极21之间的电压、施加于任意两个水平电极13之间的电压中的一种或两种，使得所述正性液晶分子31在双极性低分子量的配向分子32的配向作用下以一特定角度排列，之后撤去电压，正性液晶分子31仍能保持施加电压时的配向状态，从而实现多重稳态显示。
如图2所示，当仅在第一平面电极11和第二平面电极21之间施加足够强的电压形成竖直电场时，所述正性液晶分子31在双极性低分子量的配向分子32的配向作用下沿竖直电场方向发生转动，垂直于第一基板10及第二基板20的表面排列。在此之后，即使撤去第一平面电极11和第二平面电极21之间的电压，所述正性液晶分子31仍能保持施加电压时垂直于第一基板10及第二基板20表面排列的状态。
如图3所示，当仅在任意两个水平电极13之间施加足够强的电压形成水平电场时，所述正性液晶分子31在双极性低分子量的配向分子32的配向作用下沿水平电场方向发生转动，平行于第一基板10及第二基板20的表面排列。在此之后，即使撤去两个水平电极13之间的电压，所述正性液晶分子31仍能保持施加电压时平行于第一基板10及第二基板20表面排列的状态。
上述如图2和图3所示的两种情况较为极端，若调整施加于所述第一平面电极11与第二平面电极21之间的电压大小、或调整施加于任意两个水平电极13之间的电压大小、或者同时调整施加于所述第一平面电极11与第二平面电极21之间的电压大小与施加于任意两个水平电极13之间的电压大小，则能够使得所述正性液晶分子31在双极性低分子量的配向分子32的配向作用下以一相对于第一基板10及第二基板20的表面倾斜的角度进行排列，在此之后，即使撤去电压，正性液晶分子31仍能保持施加电压时的倾斜配向状态，能够实现多重稳态显示，在不需要改变显示内容即显示静态画面时，不再需要持续提供电压，从而降低能耗，提高移动显示设备的电池续航能力。
综上所述，本发明的多重稳态液晶显示面板，在第一基板靠近液晶层的一侧设置第一平面电极与相互间隔的数个水平电极，在第二基板靠近液晶层的一侧设置第二平面电极；所述液晶层包括多个正性液晶分子和双极性低分子量的配向分子，无需采用PI材料对液晶分子进行水平或垂直配向，通过控制双极性低分子量的配向分子在液晶层中的含量，使液晶分子的配向状况处于一种临界状态，既不会具有很强的垂直配向性也不会具有很强的水平配向性，其排列状况极易受外界电场影响，通过调整施加于所述第一平面电极与第二平面电极之间的电压、施加于任意两个水平电极之间的电压中的一种或两种，使得所述正性液晶分子在双极性低分子量的配向分子的配向作用下以一特定角度排列，之后撤去电压，正性液晶分子仍能保持施加电压时的状态，从而实现多重现稳态显示，使液晶显示面板在显示静态画面时不需要持续供电，降低能耗，提高移动显示设备的电池续航能力。
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权利要求的保护范围。

Claims (8)

1.一种多重稳态液晶显示面板，包括第一基板(10)、与所述第一基板(10)相对设置的第二基板(20)、夹设于所述第一基板(10)与第二基板(20)之间的液晶层(30)、于所述第一基板(10)靠近液晶层(30)一侧覆盖该第一基板(10)的第一平面电极(11)、覆盖所述第一平面电极(11)的绝缘层(12)、设于所述绝缘层(12)上相互间隔的数个水平电极(13)、及于所述第二基板(20)靠近液晶层(30)一侧覆盖该第二基板(20)的第二平面电极(21)；其特征在于，
所述液晶层(30)包括多个正性液晶分子(31)和双极性低分子量的配向分子(32)；
通过调整施加于所述第一平面电极(11)与第二平面电极(21)之间的电压、施加于任意两个水平电极(13)之间的电压中的一种或两种，使得所述正性液晶分子(31)在双极性低分子量的配向分子(32)的配向作用下以一特定角度排列，之后撤去电压，正性液晶分子(31)仍能保持施加电压时的状态，从而实现多重稳态显示。
2.如权利要求1所述的多重稳态液晶显示面板，其特征在于，所述双极性低分子量的配向分子(32)占液晶层重量百分比0.02％-5％。
3.如权利要求1所述的多重稳态液晶显示面板，其特征在于，所述双极性低分子量的配向分子(32)的分子量范围为100-1000。
4.如权利要求3所述的多重稳态液晶显示面板，其特征在于，所述双极性低分子量的配向分子(32)的结构通式为：
或
其中，H为苯环结构；
L1、L2、L3为苯环或饱和六元环结构；
h1与h2为连接于苯环H上的取代基团；m为h1或h2的个数，取值范围为0～2；h1为包含可聚合基团的取代基，所述可聚合基团选自甲基丙烯酸酯基、丙烯酸酯基、环氧基、乙烯基、乙烯氧基、乙炔基、与丁二烯基；h2为含杂原子基团的极性基团，所述杂原子基团的数目为1～4个，选自如下基团：-OH、-SH、-NH2、-O-、-S-、-NHR、-NH-、-NR2、-NR-、中的一种或多种；
a为分别连接于L1、L2、或L3上的取代基团；n为a的数目，取值范围为0～4；a选自H、F、Cl、Br、CN、包含1-10个碳原子的直链或支链烷基中的一种；
T为尾端基团，所述尾端基团为包含1～25个碳原子的分子链。
5.如权利要求1所述的多重稳态液晶显示面板，其特征在于，所述绝缘层(12)的材料为氮化硅、氧化硅或二者的组合。
6.如权利要求1所述的多重稳态液晶显示面板，其特征在于，所述第一平面电极(11)、第二平面电极(21)、及数个水平电极(13)的材料为ITO。
7.如权利要求1所述的多重稳态液晶显示面板，其特征在于，所述第一基板(10)与第二基板(20)的其中一个为TFT基板，另一个为CF基板。
8.如权利要求1所述的多重稳态液晶显示面板，其特征在于，所述水平电极(13)的数量为两个。
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CN110221499B (zh) * 2019-05-27 2021-01-01 北京航空航天大学 低边缘场串扰的LCoS微显示器

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