WO2014043958A1 - 液晶介质混合物及使用其的液晶显示器 - Google Patents

液晶介质混合物及使用其的液晶显示器 Download PDF

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WO2014043958A1
WO2014043958A1 PCT/CN2012/083001 CN2012083001W WO2014043958A1 WO 2014043958 A1 WO2014043958 A1 WO 2014043958A1 CN 2012083001 W CN2012083001 W CN 2012083001W WO 2014043958 A1 WO2014043958 A1 WO 2014043958A1
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liquid crystal
medium mixture
polymerizable monomer
crystal medium
straight
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PCT/CN2012/083001
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English (en)
French (fr)
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冯惺
钟新辉
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深圳市华星光电技术有限公司
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Priority to US13/703,597 priority Critical patent/US20140084211A1/en
Publication of WO2014043958A1 publication Critical patent/WO2014043958A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C09K19/3098—Unsaturated non-aromatic rings, e.g. cyclohexene rings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K2019/0444—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
    • C09K2019/0448—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
    • C09K2019/122—Ph-Ph
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
    • C09K19/3402—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom
    • C09K2019/3422—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom the heterocyclic ring being a six-membered ring
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
    • C09K19/542—Macromolecular compounds
    • C09K2019/548—Macromolecular compounds stabilizing the alignment; Polymer stabilized alignment
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13775—Polymer-stabilized liquid crystal layers

Definitions

  • the present invention relates to liquid crystal display technology, and more particularly to a liquid crystal medium mixture and a liquid crystal display using the same. Background technique
  • the liquid crystal used for the TN (Twisted nematic) or STN (Super Twisted Nematic) liquid crystal display is a positive liquid crystal, and the long axis of the liquid crystal molecules is parallel to the surface of the substrate when the power is not applied.
  • the alignment direction of the liquid crystal molecules on the surface of the substrate is determined by the rubbing direction of the alignment layer (Polyimide).
  • the alignment direction of the two substrates is perpendicular, so the molecules of the liquid crystal layer from one substrate surface to the other substrate surface. It is in a continuous twisting state. When a voltage is applied, the long axes of the liquid crystal molecules will tend to align in the direction of the electric field.
  • the disadvantage of the TN/STN type liquid crystal display is that the viewing angle is small, the luminance difference and the chromatic aberration are large at a large viewing angle, and it is required to be improved by the compensation film, thereby improving the manufacturing cost of the display.
  • MVA Multi-domain vertical alignment
  • TFT-LCD 4 solves the problem of viewing angle limitation of TN/STN display. It uses negative liquid crystal and vertical alignment film materials. When no voltage is applied, the long axis of the liquid crystal molecules is perpendicular to the surface of the substrate, and application of a voltage causes the liquid crystal molecules to pour, and the long axes of the liquid crystal molecules tend to be aligned in the direction of the vertical electric field.
  • one sub-pixel is divided into a plurality of regions, so that the liquid crystal molecules are tilted in different directions, so that the effects seen by the display from different directions tend to be uniform. There are various methods for directing liquid crystal molecules of different regions into different directions within one sub-pixel.
  • the first is to make a Bump (bulge) on the upper and lower substrates of the LCD by exposure and development, so that the liquid crystal molecules around the Bump generate a certain pretilt angle, and the liquid crystal molecules are directed to tilt in a fixed direction; the second is on the upper and lower substrates.
  • a Bump bulge
  • this technique is called PVA (Patterned Vertical Alignment) technology; the third is forming ITO slit (crack) on the TFT side of the LCD substrate, the other side For Full ITO, a polymerizable monomer is added to the liquid crystal medium, and the liquid crystal molecules are first poured by an electric field, and the panel is irradiated with ultraviolet light to polymerize the monomer to form a polymer particle having a liquid crystal molecule to be poured, and deposited on the surface of the substrate. As a function of alignment, this technique becomes a PSVA (Polymer stabilized vertical alignment) technology.
  • PSVA Polymer stabilized vertical alignment
  • the reaction rate of the polymerizable monomer, the size and distribution of the polymer, the uniformity of the surface of the substrate, and the strength of the alignment force have important influences on the optical taste and mass production stability of the panel. These factors are affected by the process conditions. In addition, the main reason for determining these factors is the molecular structure of the polymerizable monomer, because the molecular structure of the polymerizable monomer directly determines the speed of its photoreaction, the characteristics of the polymer formed, the alignment force to the liquid crystal, and the like. Since the existing liquid crystal medium generally contains an alkenyl compound, which is advantageous for obtaining a low rotational viscosity, the response of the liquid crystal medium can be improved.
  • the existing liquid crystal medium generally contains an alkenyl compound, it is advantageous to obtain a low rotational viscosity.
  • Increasing the response of the liquid crystal medium, and the alkenyl compound contained in the liquid crystal medium easily affects the reaction polymerization of the polymerizable monomer, thereby affecting the alignment of the liquid crystal medium, so it is necessary to select a suitable polymerizable monomer to make the polymer uniformity. Good, strong alignment and fast response.
  • the technical problem to be solved by the present invention is to provide a liquid crystal medium mixture using a polymerizable monomer, and the reaction rate of the polymerization reaction, the uniformity of formation of the polymer, and the strength of the alignment force are all at a high level.
  • liquid crystal display wherein the liquid crystal medium mixture adopts a polymerizable monomer, and the reaction speed of the polymerization reaction of the monomer, the uniformity of forming the polymer, and the strength of the alignment force are all obtained at a high level, and the panel is improved.
  • the optical taste and overall performance achieve stable mass production.
  • a liquid crystal medium mixture including components: a liquid crystal material and a polymerizable monomer that can undergo polymerization under ultraviolet light irradiation, the liquid crystal material being included in the polymerizable single
  • the alkenyl compound which is stable to the polymerization during the bulk polymerization, wherein the polymerizable monomer accounts for 0.1% to 1% by weight of the total liquid crystal medium mixture;
  • the molecular formula of the polymerizable monomer is
  • the hydrogen atom on any aromatic ring in the structural formula of the polymerizable monomer may be substituted with a group such as -F, -Cl, -Br, fluorenyl or -CN.
  • R1 represents a straight or branched alkenyl group having 2 to 9 carbon atoms
  • R2 represents a straight or branched alkyl group having 1 to 12 carbon atoms
  • X independently represents 11, F, Cl, OCF 3 or CF 3 ;
  • n 1;
  • n and k represent 0 ⁇ 3 respectively.
  • a liquid crystal display comprising: a liquid crystal material And a polymerizable monomer which is polymerizable under irradiation of ultraviolet light, the liquid crystal material comprising an alkenyl compound which is stable to polymerization upon polymerization of the polymerizable monomer, the polymerizable monomer being accounted for by weight 0.1% to 1% of the total amount of the liquid crystal medium mixture; the molecular formula of the polymerizable monomer is:
  • the hydrogen atom on any aromatic ring in the structural formula of the polymerizable monomer may be substituted with a group such as -F, -Cl, -Br, fluorenyl or -CN.
  • the base compound has the following structural formula:
  • R1 represents a straight or branched alkenyl group having 2 to 9 carbon atoms
  • R2 represents a straight or branched alkyl group having 1 to 12 carbon atoms
  • X independently represents 11, F, Cl, OCF 3 or CF 3 ;
  • Embodiments of the present invention have the following beneficial effects:
  • the liquid crystal medium mixture of the invention adopts a polymerizable monomer which can be polymerized under ultraviolet light irradiation, and can be polymerized to obtain polymer protrusions with small size and uniformity, thereby avoiding poor liquid crystal alignment and liquid crystal panel.
  • the dark state phenomenon occurs, so that the response speed of the liquid crystal panel is increased and high contrast is obtained. Applying it to a liquid crystal display improves the optical taste and overall performance of the liquid crystal display panel, achieving stable mass production.
  • the present invention provides a liquid crystal medium mixture for a liquid crystal display, the liquid crystal medium mixture comprising the following components: a liquid crystal material and a polymerizable monomer containing only one polymerization reaction under ultraviolet light irradiation, the liquid crystal material including The alkenyl compound which is stable to the polymerization when the polymerizable monomer is polymerized, the polymerizable monomer being from 0.1% to 1% by weight based on the total amount of the liquid crystal medium mixture; wherein the polymerizable monomer is part by weight Calculating the total amount of the liquid crystal medium mixture
  • the hydrogen atom on any aromatic ring in the structural formula of the polymerizable monomer may be substituted by the following groups: -F, -Cl, -Br, fluorenyl or -CN.
  • the total weight percent of the polymerizable monomer in the liquid crystal medium mixture is 0.3%.
  • the gynecyl compound has the following structural formula:
  • R1 represents a straight or branched alkenyl group having 2 to 9 carbon atoms
  • R2 represents a straight or branched alkyl group having 1 to 12 carbon atoms
  • X independently represents 11, F, Cl, OCF 3 or CF 3 ;
  • n 1;
  • n and k represent 0 ⁇ 3 respectively.
  • the polymerizable monomers are respectively RM-Al, and the structural formula of RM-A1 is as follows:
  • the RM-A1 content is 3000 ppm of the liquid crystal dielectric layer.
  • the polymer bump formed by ultraviolet irradiation is small in size and uniform, and there is no dark state of light.
  • the content may also be selected such as 1000 ppm, 8000 ppm or 1000 ppm of the dielectric layer.
  • the liquid crystal medium mixture for a liquid crystal display according to the present invention can control polymerization to form a polymerization by a polymerizable monomer contained in the liquid crystal medium mixture which can be polymerized under ultraviolet light irradiation.
  • the size and uniformity of the protrusions avoid the occurrence of poor alignment of the liquid crystal and the dark spot phenomenon of the liquid crystal panel, so that the liquid crystal panel obtains good optical performance such as high contrast and high response speed.
  • the liquid crystal medium mixture of the present invention is applicable to a display, and the liquid crystal display using the liquid crystal medium mixture of the present invention comprises: an upper substrate and a lower substrate disposed opposite to each other, and a liquid crystal medium disposed between the upper substrate and the lower substrate
  • the mixture, the liquid crystal medium mixture is the above-mentioned liquid crystal medium mixture of the present invention, and is not described herein.
  • the liquid crystal medium mixture can simultaneously achieve equilibrium in the reaction rate of the polymerization reaction, the uniformity of formation of the polymer, and the strength of the alignment force, and obtain a higher level, that is, a polymerization rate.
  • the polymer uniformity and the strength of the alignment force are also high, so that the optical taste and overall performance of the liquid crystal display panel can be improved, and stable mass production can be achieved.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

本发明提供一种液晶介质混合物及使用其的液晶显示器，该液晶介质混合物包括组分：至少一种各相异性液晶材料及仅一种可在紫外光照射下发生聚合反应的可聚合单体；所述可聚合单体按重量份计算占液晶介质混合物总量的0.1%-1%。本发明的液晶介质混合物及使用其的液晶显示器，液晶介质混合物采用通过采用一种可在紫外光照射下发生聚合反应的可聚合单体以及合适配比，可以聚合反应得到尺寸较小、均匀性好的聚合物突起物，避免了液晶配向不良、液晶面板暗态亮点现象的发生，从而使液晶面板响应速度变快并获得高对比度，实现稳定的量产性。

Description

液晶介质混合物及使用其的液晶显示器 本申请要求于 2012 年 9 月 21 日提交中国专利局、 申请号为 201210355485.7、 发明名称为 "液晶介质混合物及使用其的液晶显示器" 的 中国专利申请的优先权， 上述专利的全部内容通过引用结合在本申请中。 技术领域
本发明涉及液晶显示技术， 尤其涉及一种液晶介质混合物及使用其的液 晶显示器。 背景技术
TN ( Twisted nematic, 扭曲向列型）或 STN ( Super twisted nematic, 超 扭曲向列型 )液晶显示器所用的液晶为正型液晶， 未加电时液晶分子长轴平 行于基板表面。 基板表面液晶分子的排列方向由配向层 ( Alignment layer, 材质通常为 Polyimide ) 的摩擦方向 （Rubbing direction ) 决定， 两基板表面 配向方向垂直， 所以从一个基板表面到另一个基板表面， 液晶层的分子呈连 续扭转排列状态。 当施加电压之后， 液晶分子的长轴将倾向于沿电场的方向 排列。 TN/STN型液晶显示器的缺点是可视角小， 在大视角下的亮度差异和 色差严重， 需要通过补偿膜对此进行改善， 从而提高了显示器的制造成本。
MVA ( Multi-domain vertical alignment, 多象限垂直配向型） TFT-LCD 4艮好的解决了 TN/STN显示器视角限制的问题， 它采用负型液晶与垂直配向 膜材料。 未施加电压时， 液晶分子长轴均垂直于基板表面， 施加电压会使液 晶分子倾倒，液晶分子长轴倾向于沿垂直电场方向排列。为了解决视角问题， 一个亚像素被分成多个区域， 使液晶分子朝不同的方向倾倒， 让显示器从不 同的方向看到的效果趋于一致。在一个亚像素内使不同区域的液晶分子导向 不同的方向有多种方法。 第一种是通过曝光显影的办法在 LCD的上下基板 制作出 Bump (***物 ), 使 Bump周围的液晶分子产生一定的预倾角， 引导 液晶分子朝固定方向倾倒； 第二种是在上下基板上形成具有一定图案的 ITO ( Indium Tin Oxide, 氧化铟锡 )像素电极， 由此产生的电场具有一定的倾斜 角度， 从而控制不同区域的液晶分子的导向， 此技术被称为 PVA ( Patterned vertical alignment, 垂直取向构型 )技术； 第三种是在 LCD基板的 TFT侧形 成 ITO slit(裂缝），另一侧为 Full ITO,在液晶介质中添加可聚合的 monomer (单体）， 先通过电场使液晶分子倾倒， 同时用紫外光照射面板使 monomer 聚合形成具有引导液晶分子倾倒的聚合物颗粒，沉积在基板表面起到配向的 作用， 这种技术成为 PSVA ( Polymer stabilized vertical alignment, 聚合物稳、 定垂直对齐）技术。
可聚合单体的反应速度、 聚合物的大小及分布、 在基板表面均匀性、 配 向力的强弱等因素对面板的光学品味、 量产稳定性有重要影响， 这些因素除 了受制程条件的影响之外， 决定这些因素的主要原因是可聚合单体的分子结 构， 因为可聚合单体的分子结构直接决定了其光反应的快慢、 形成聚合物的 特性、对液晶的配向力强弱等。由于现有的液晶介质中一般含有烯基化合物， 有利于获得低的旋转粘度， 因而可提高液晶介质的响应， 由于现有的液晶介 质中一般含有烯基化合物， 有利于获得低的旋转粘度以提高液晶介质的响 应， 而在液晶介质中含有的烯基化合物容易影响可聚合单体的反应聚合， 从 而影响到液晶介质的配向，故需要选择合适的可聚合单体以使聚合物的均匀 性好、 配向力强及反应速度快。 发明内容
本发明的所要解决的技术问题在于， 提供一种液晶介质混合物， 采用一 种可聚合单体， 其聚合反应的反应速度、 形成聚合物的均匀性及配向力的强 度均得到较高的水平。
以及提供一种液晶显示器， 其液晶介质混合物采用一种可聚合单体， 单 体的聚合反应的反应速度、形成聚合物的均匀性及配向力的强度能均得到较 高的水平， 提高了面板的光学品味和总体表现， 实现稳定的量产性。
为解决上述技术问题， 本发明实施例提供一种液晶介质混合物， 其包括 组分： 液晶材料和一种可在紫外光照射下发生聚合反应的可聚合单体， 该液 晶材料包括在可聚合单体聚合时对聚合反应稳定的烯基化合物， 所述可聚合 单体按重量份计算占所述液晶介质混合物总量的 0.1%-1%； 其中， 所述可聚合单体的分子式为 .
Figure imgf000004_0001
其中，所述可聚合单体的结构通式中的任意芳香环上的氢原子可以被如 下基团取代： -F、 -Cl、 -Br、 曱基或 -CN。
其中， 所述可聚合单体在液晶介质混合物中的总重量百分比为 0.3%。
其具有如下结构通式：
Figure imgf000004_0002
其中，
Figure imgf000004_0003
Rl表示具有 2-9个碳原子的直链或支链烯基；
R2表示具有 1-12个碳原子的直链或支链烷基；
X分别独立的表示11、 F、 Cl、 OCF3或 CF3;
m表示 1-4;
n、 k分别表示 0~3。
相应地， 本发明的另一方面， 提供一种液晶显示器， 其包括： 液晶材料 和一种可在紫外光照射下发生聚合反应的可聚合单体，该液晶材料包括在可 聚合单体聚合时对聚合反应稳定的烯基化合物，所述可聚合单体按重量份计 算占所述液晶介质混合物总量的 0.1%-1%； 所述可聚合单体的分子式为：
Figure imgf000005_0001
其中，所述可聚合单体的结构通式中的任意芳香环上的氢原子可以被如 下基团取代： -F、 -Cl、 -Br、 曱基或 -CN。
其中， 所述可聚合单体在液晶介质混合物中的总重量百分比为 0.3%。 其中， 所述婦基化合物， 其具有如下结构通式：
Figure imgf000005_0002
其中，
Figure imgf000005_0003
R1表示具有 2-9个碳原子的直链或支链烯基；
R2表示具有 1-12个碳原子的直链或支链烷基;
X分别独立的表示11、 F、 Cl、 OCF3或 CF3;
m表示 1-4; n、 k分别表示 0~3。 实施本发明的实施例， 具有如下有益效果：
本发明的液晶介质混合物， 采用一种可在紫外光照射下发生聚合反应的 可聚合单体， 可以聚合反应得到尺寸较小、 均匀性好的聚合物突起物， 避免 了液晶配向不良、 液晶面板暗态亮点现象的发生， 从而使液晶面板响应速度 变快并获得高对比度。 将其应用于液晶显示器中， 提高了液晶显示器面板的 光学品味和总体表现， 实现稳定的量产性。 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。
本发明提供一种用于液晶显示器的液晶介质混合物，所述液晶介质混合 物包括如下组分： 液晶材料和仅含有一种可在紫外光照射下发生聚合反应的 可聚合单体，该液晶材料包括在可聚合单体聚合时对聚合反应稳定的烯基化 合物， 所述可聚合单体按重量份计算占液晶介质混合物总量的 0.1%-1%； 其中， 所述可聚合单体按重量份计算占所述液晶介质混合物总量的
0.1%-1%； 所述可聚合单体的分子式为：
Figure imgf000006_0001
所述可聚合单体的结构通式中的任意芳香环上的氢原子可以被如下基 团取代： -F、 -Cl、 -Br、 曱基或 -CN。
在一个实施例中，所述可聚合单体在液晶介质混合物中的总重量百分比 为 0.3%。
所述婦基化合物， 其具有如下结构通式：
Figure imgf000007_0001
其中，
Figure imgf000007_0002
Rl表示具有 2-9个碳原子的直链或支链烯基；
R2表示具有 1-12个碳原子的直链或支链烷基；
X分别独立的表示11、 F、 Cl、 OCF3或 CF3;
m表示 1-4;
n、 k分别表示 0~3。 下面通过具体实施例， 说明本发明实施方式。
实施例 1 :
具体如下:
Figure imgf000007_0003
可聚合单体分别为 RM-Al , RM-A1的结构式如下所示:
Figure imgf000008_0001
RM-A1 含量占液晶介质层的 3000ppm。 液晶介质混合物中， 通过紫外 线照射生成的聚合物 bump的尺寸小、 均匀， 不存在暗态亮光现象。 在其他 的实施例中， 其含量也可以选择诸如为介质层的 1000ppm、 8000ppm 或 lOOOOppm等。
综上所述， 本发明所述的用于液晶显示器的液晶介质混合物， 通过该液 晶介质混合物中含有的一种可在紫外光照射下发生聚合反应的可聚合单体， 可以控制聚合反应形成聚合物突起物的大小和均匀性， 避免了液晶配向不 良、 液晶面板暗态亮点现象的发生， 以此使得液晶面板获得好的光学表现， 如高对比度和高响应速度。
本发明的液晶介质混合物可应用于显示器，本发明的使用上述液晶介质 混合物的液晶显示器， 其包括： 相对平行设置的上基板与下基板、 及设于该 上基板与下基板之间的液晶介质混合物， 该液晶介质混合物即为本发明上述 的液晶介质混合物，在此不累赘述之。液晶介质混合物通过使用可聚合单体， 使得可聚合单体在聚合反应的反应速度、形成聚合物的均匀性及配向力的强 度能同时达到平衡， 且获得较高的水平， 即， 聚合反应速度快的同时， 形成 聚合物均匀性及配向力强度也高，从而可提高液晶显示器面板的光学品味和 总体表现， 实现稳定的量产性。
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

权 利 要 求
1、 一种液晶介质混合物， 其特征在于， 其包括组分： 液晶材料和仅含 有一种可在紫外光照射下发生聚合反应的可聚合单体，该液晶材料包括在可 聚合单体聚合时对聚合反应稳定的烯基化合物， 所述可聚合单体按重量份计 算占所述液晶介质混合物总量的 0.1%-1%； 所述可聚合单体的分子式为：
Figure imgf000009_0001
2、 如权利要求 1所述的一种液晶介质混合物， 所述可聚合单体的结构 通式中的任意芳香环上的氢原子可以被如下基团取代： -F、 -Cl、 -Br、 曱基 或 -CN。
3、 如权利要求 1所述的液晶介质混合物， 其特征在于， 所述可聚合单 体在液晶介质混合物中的总重量百分比为 0.3%。
4、 如权利要求 1所述的液晶介质混合物， 其特征在于， 所述婦基化合 物， 其具有如下结构通式：
Figure imgf000009_0002
Figure imgf000009_0003
Figure imgf000010_0001
Rl表示具有 2-9个碳原子的直链或支链烯基；
R2表示具有 1-12个碳原子的直链或支链烷基；
X分别独立的表示11、 F、 Cl、 OCF3或 CF3;
m表示 1-4;
n、 k分别表示 0~3。
5、 如权利要求 2所述的液晶介质混合物， 其特征在于， 所述婦基化合 物，
Figure imgf000010_0002
其中，
Figure imgf000010_0003
R1表示具有 2-9个碳原子的直链或支链烯基；
R2表示具有 1-12个碳原子的直链或支链烷基;
X分别独立的表示11、 F、 Cl、 OCF3或 CF3;
m表示 1-4;
n、 k分别表示 0~3。
6、 如权利要求 3所述的液晶介质混合物， 其特征在于， 所述婦基化合
Figure imgf000011_0001
R1表示具有 2-9个碳原子的直链或支链烯基；
R2表示具有 1-12个碳原子的直链或支链烷基;
X分别独立的表示11、 F、 Cl、 OCF3或 CF3;
m表示 1-4;
n、 k分别表示 0~3。
7、 一种液晶显示器， 其特征在于， 其包括： 液晶材料和仅含有一种可 在紫外光照射下发生聚合反应的可聚合单体， 该液晶材料包括在可聚合单体 聚合时对聚合反应稳定的烯基化合物， 所述可聚合单体按重量份计算占所述 液晶介质混合物总量的 0.1%-1%； 所述可聚合单体的分子式为：
8、 如权利要求 7所述的一种液晶显示器， 所述可聚合单体的结构通式 中的任意芳香环上的氢原子可以被如下基团取代： -F、 -Cl、 -Br、 曱基或 -CN。
9、 如权利要 8所述的液晶显示器， 其特征在于， 所述可聚合单体在液 晶介质混合物中的总重量百分比为 0.3%。
10、 如权利要求 7所述的液晶显示器， 其特征在于， 所述婦基化合物， 其
Figure imgf000012_0001
R1表示具有 2-9个碳原子的直链或支链烯基；
R2表示具有 1-12个碳原子的直链或支链烷基；
X分别独立的表示11、 F、 Cl、 OCF3或 CF3;
m表示 1-4;
n、 k分别表示 0~3。
11、 如权利要求 8所述的液晶显示器， 其特征在于， 所述婦基化合物, 其具有如下结构通式：
Figure imgf000013_0001
Figure imgf000013_0002
Rl表示具有 2-9个碳原子的直链或支链烯基；
R2表示具有 1-12个碳原子的直链或支链烷基；
X分别独立的表示11、 F、 Cl、 OCF3或 CF3;
m表示 1-4;
n、 k分别表示 0~3。
12、 如权利要求 9所述的液晶显示器， 其特征在于， 所述婦基化合物, 其
Figure imgf000013_0003
其中，
Figure imgf000014_0001
Rl表示具有 2-9个碳原子的直链或支链烯基； R2表示具有 1-12个碳原子的直链或支链烷基; X分别独立的表示11、 F、 Cl、 OCF3或 CF3; m表示 1-4;
n、 k分别表示 0~3。
PCT/CN2012/083001 2012-09-21 2012-10-16 液晶介质混合物及使用其的液晶显示器 WO2014043958A1 (zh)

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