WO2014114012A1 - 一种配向膜材料及相应的液晶面板 - Google Patents

一种配向膜材料及相应的液晶面板 Download PDF

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WO2014114012A1
WO2014114012A1 PCT/CN2013/071229 CN2013071229W WO2014114012A1 WO 2014114012 A1 WO2014114012 A1 WO 2014114012A1 CN 2013071229 W CN2013071229 W CN 2013071229W WO 2014114012 A1 WO2014114012 A1 WO 2014114012A1
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alignment film
film material
liquid crystal
polymer
solvent
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PCT/CN2013/071229
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English (en)
French (fr)
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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 GB1513052.9A priority Critical patent/GB2524927B/en
Priority to US13/824,407 priority patent/US20140211140A1/en
Priority to JP2015554010A priority patent/JP6127156B2/ja
Priority to DE112013006350.6T priority patent/DE112013006350T5/de
Publication of WO2014114012A1 publication Critical patent/WO2014114012A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/10—Esters
    • C08F20/26—Esters containing oxygen in addition to the carboxy oxygen
    • C08F20/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • 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
    • G02F1/139—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 based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1393—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 based on orientation effects in which the liquid crystal remains transparent the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
    • C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
    • C08F220/281—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing only one oxygen, e.g. furfuryl (meth)acrylate or 2-methoxyethyl (meth)acrylate
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic 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 invention relates to a Chinese patent application filed on January 25, 2013 by the Chinese Patent Office, the application number is 201310028184.8, and the invention name is "an alignment film material and a corresponding liquid crystal panel". Priority, the entire contents of the above-identified patents are incorporated herein by reference.
  • the present invention relates to liquid crystal display technology, and more particularly to an alignment film material and a corresponding liquid crystal panel.
  • 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 direction of the 4# column of the liquid crystal molecules on the surface of the substrate is determined by the rubbing direction of the alignment layer (Polyimide), and the alignment direction of the two substrates is perpendicular, so that the liquid crystal layer is from one substrate surface to the other substrate surface.
  • the molecules are in a state of continuous twisting. 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 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.
  • An ITO (Indium Tin Oxide) pixel electrode having a certain pattern is formed, and the electric field generated thereby has a certain inclination angle, thereby controlling the alignment of liquid crystal molecules in different regions.
  • PVA Plasma-Voltage
  • the third is to form an ITO slit on the TFT side of the LCD substrate, and the other side is Full ITO, adding a polymerizable monomer to the liquid crystal medium, first pass
  • the electric field causes the liquid crystal molecules to be poured, and the monaster is irradiated with ultraviolet light to form a polymer particle having a liquid crystal molecule to be poured, and deposited on the surface of the substrate to perform alignment.
  • This technique becomes PSVA (Polymer stabilized vertical alignment). Vertical alignment) technology.
  • the key process in PSVA technology is to control the reaction of the monomer, including reaction rate, reaction uniformity, and residual control of the final monomer. Only a good control of the above conditions can result in a high quality PSVA LCD panel. However, in practice, it is still an important issue to control the concentration of the monomer after UV irradiation.
  • the technical problem to be solved by the present invention is to provide an alignment film material for a PSVA liquid crystal display device and a corresponding liquid crystal panel, which can control the monster concentration of the panel after the UV irradiation process to a low level without Significantly increase the amount of mobile ions in the panel, thereby avoiding the problem of quality degradation caused by the residual or ion concentration of the panel in the RA experiment and subsequent actual use.
  • an embodiment of the present invention provides an alignment film material for a polymer-stabilized vertical alignment liquid crystal display, and the alignment film material comprises: a polymer, an oligomer, and a solvent, wherein the following group structure:
  • X represents a substituent group, and the substituent groups X at different positions are independent of each other and may be the same or different;
  • m represents the number of substituents X per benzene ring structure, and the number of substituents on each benzene ring is m Independent of each other, may be the same or different;
  • the solvent comprises one or more of the following solvents: N-decylpyrrolidone solvent, N-ethylpyrrolidone solvent, and butyrolactone solvent; and the solvent weight is from 80% to 99% by weight based on the total weight of the alignment film material.
  • the high polymer is a polymer having a molecular weight of more than 10,000, and the oligomer has a molecular weight of less than 10,000 polymers.
  • the alignment film material further comprises a leveling agent and an antifoaming agent.
  • an alignment film material for a polymer-stabilized vertical alignment liquid crystal display comprising: a polymer, an oligomer, and a solvent, wherein the group structure :
  • X represents a substituent group, and the substituent groups X at different positions are independent of each other and may be the same or different;
  • m is the number of substituents X per benzene ring structure, and the number of substituents on each benzene ring is m Independent of each other, the same or different.
  • the solvent comprises one or more of the following solvents:
  • N-decylpyrrolidone solvent N-ethylpyrrolidone solvent, and butyrolactone solvent.
  • the solvent weighs from 80% to 99% by weight based on the total weight of the alignment film material.
  • the high polymer is a polymer having a molecular weight of more than 10,000
  • the oligomer is a polymer having a molecular weight of less than 10,000.
  • the alignment film material further comprises a leveling agent and an antifoaming agent.
  • a further aspect of the present invention provides a liquid crystal panel comprising: a first transparent substrate having a first alignment film;
  • the liquid crystal composition is filled between the first transparent substrate and the second transparent substrate, and the liquid crystal composition contacts the first alignment film and the second alignment film;
  • the material of the alignment film comprises: a polymer, an oligomer and a solvent, and the high polymer or/and the oligomer comprises the following group structure:
  • X represents a substituent group, and the substituent groups X at different positions are independent of each other and may be the same or different;
  • m is the number of substituents X per benzene ring structure, and the number of substituents on each benzene ring is m Independent of each other, the same or different.
  • the solvent comprises one or more of the following solvents:
  • N-decylpyrrolidone solvent N-ethylpyrrolidone solvent, and butyrolactone solvent.
  • the solvent weighs from 80% to 99% by weight based on the total weight of the alignment film material.
  • the high polymer is a polymer having a molecular weight of more than 10,000
  • the oligomer is a polymer having a molecular weight of less than 10,000.
  • the alignment film material further comprises a leveling agent and an antifoaming agent.
  • the compound membrane material provided by the embodiment of the invention comprises at least one polymer, and the side chain of the polymer comprises a structure containing a benzophenone group, and the structure of the benzophenone is very sensitive to UV light, Absorbs UV light energy over a wide spectral range, decomposes to form free radicals, initiates polymerization of the monomer, and increases the reaction rate and conversion efficiency of the monster.
  • the structural group is bonded with a mercapto acrylate group, which can undergo polymerization reaction itself, so that the free radicals or charged molecular fragments generated therefrom can participate in the polymerization reaction, and are connected to the polymer without causing ions. The problem of too high a concentration.
  • FIG. 1 is a schematic view of a polymer stabilized vertical alignment liquid crystal display panel of the present invention.
  • FIG. 1 a schematic diagram of a polymer stabilized vertical alignment liquid crystal display panel of the present invention is shown.
  • the liquid crystal display panel is used in a PSVA LCD, and includes:
  • the first transparent substrate 1 has a first alignment film 50;
  • the second transparent substrate 2 has a second alignment film 51;
  • the liquid crystal composition 3 is filled between the first transparent substrate 1 and the second transparent substrate 2, and the liquid crystal composition 3 contacts the first alignment film 50 and the second alignment film 51, and the liquid crystal composition contains at least liquid crystal molecules 30, And a polymerizable monomer, under the action of the first alignment film 50 and the second alignment film 51, the polymerizable monomer forms a Bump (protrusion) 31 near the first substrate 1 and the second substrate 2;
  • the materials used for the first alignment film and the second alignment film include:
  • a polymer, an oligomer, and a solvent wherein the high polymer or/and the oligomer comprise the following base structure:
  • the group structure comprises a structure of a benzophenone, and a thiol acrylate group is attached;
  • X represents a substituent group, and the substituent groups X at different positions are independent of each other, and may be the same or different;
  • m is The number of substituents X per benzene ring structure, the number m of substituents on each benzene ring are independent of each other, and may be the same or different.
  • the solvent comprises one or more of the following solvents:
  • NMP N-decylpyrrolidone solvent
  • NEP N-ethylpyrrolidone solvent
  • Gamma-BL butyrolactone
  • the alignment film material further contains a leveling agent and an antifoaming agent.
  • the compounding film material provided by the embodiment of the invention comprises at least one polymer, and the side chain of the polymer comprises a structure containing a benzophenone group, and the structure of the benzophenone is very sensitive to ultraviolet light, Absorbs ultraviolet light energy in a wide spectral range, decomposes to form free radicals, initiates polymerization of polymerizable monomers, and increases reaction rate and conversion efficiency of polymerizable monomers.
  • the structural group is bonded with a mercapto acrylate group, which can undergo polymerization reaction itself, so that the radical or charged molecular fragment generated therefrom can participate in the polymerization reaction and be connected to the polymer without causing The problem of excessive ion concentration.
  • the present invention improves the quality reliability of the liquid crystal panel by controlling the reaction rate of the polymerizable monomer and the residual amount of the polymerizable monomer in the PSVA liquid crystal mixture by using the alignment film material, and controlling the movable ion content in the liquid crystal panel.

Abstract

一种配向膜材料，其用于聚合物稳定垂直配向的液晶显示器，包括高聚物，低聚物和溶剂，其中，所述高聚物或/和低聚物中包含有二苯甲酮的结构以及甲基丙烯酸酯基团的结构。相应地，提供了一种采用上述配向膜的液晶面板。通过采用配向膜材料来调控聚合物稳定垂直配向液晶混合物中可聚单体的反应速率与可聚合单体残留量，控制液晶面板中的可移动离子含量，以此提高液晶面板的品质可靠性。

Description

一种配向膜材料及相应的液晶面板 本申请要求于 2013 年 1 月 25 日提交中国专利局、 申请号为 201310028184.8、 发明名称为 "一种配向膜材料及相应的液晶面板" 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， 尤其涉及一种配向膜材料及相应的液晶面 板。
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 4#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 很好的解决了 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 (隆起物）， 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。
PSVA技术中的关键过程是对 monomer的反应进行控制，包括反应速率， 反应均匀性以及最终 monomer的残留控制等等。 只有对对上述情况进行很 好的控制才能得到高品质的 PSVA 液晶面板。 但是实际中要很好控制 monomer在紫外光 UV照射制程后的浓度仍然是一项重要课题。
发明内容
本发明的所要解决的技术问题在于， 提供一种用于 PSVA液晶显示器件 的配向膜材料及相应的液晶面板， 它能够使面板在 UV 照射制程后的 monomer浓度控制在较低的水平， 同时不显著增加面板内可以动离子的含 量，由此避免面板在 RA实验以及后续实际使用中出现由于 monomer残留或 离子浓度过高导致的品质下降问题。
为解决上述技术问题， 本发明实施例提供一种配向膜材料， 其用于聚合 物稳定垂直配向液晶显示器， 配向膜材料包括： 高聚物、 低聚物和溶剂， 其 中， 如下基团结构：
Figure imgf000003_0001
其中， X代表取代基团， 在不同位置上的取代基团 X相互独立， 可以相 同或不相同； m代表每个苯环结构上取代基 X的个数，各苯环上取代基个数 m相互独立， 可相同或不同；
溶剂包含以下溶剂中的一种或几种： N-曱基吡咯烷酮溶剂、 N-乙基吡咯 烷酮溶剂以及丁内酯溶剂； 且溶剂重量占配向膜材料总重量的 80%至 99%。
其中， 的高聚物为分子量大于 10000的聚合物， 的低聚物为分子量小于 10000的聚合物。
其中， 配向膜材料进一步包含流平剂和消泡剂。
相应地， 本发明实施例的另一方面提供一种配向膜材料， 其用于聚合物 稳定垂直配向液晶显示器， 配向膜材料包括： 高聚物、低聚物和溶剂， 其中， 所 基团结构：
Figure imgf000004_0001
其中， X代表取代基团， 在不同位置上的取代基团 X相互独立， 可以相 同或不相同； m为每个苯环结构上取代基 X的个数，各苯环上取代基个数 m 相互独立， 可相同或不同。
其中， 溶剂包含以下溶剂中的一种或几种：
N-曱基吡咯烷酮溶剂、 N-乙基吡咯烷酮溶剂以及丁内酯溶剂。
其中， 溶剂重量占配向膜材料总重量的 80%至 99%。
其中， 的高聚物为分子量大于 10000的聚合物， 的低聚物为分子量小于 10000的聚合物。
其中， 配向膜材料进一步包含流平剂和消泡剂。
相应地，本发明实施例的再一方面，提供一种液晶面板，液晶面板包含： 第一透明基板， 具有第一配向膜；
第二透明基板， 具有第二配向膜； 以及
液晶组合物， 填充于第一透明基板及第二透明基板之间， 且液晶组合物 接触第一配向膜及第二配向膜；
其中， 配向膜的材料包括： 高聚物、 低聚物和溶剂， 所高聚物或 /和低聚 物中包含如下基团结构：
Figure imgf000004_0002
其中， X代表取代基团， 在不同位置上的取代基团 X相互独立， 可以相 同或不相同； m为每个苯环结构上取代基 X的个数，各苯环上取代基个数 m 相互独立， 可相同或不同。
其中， 溶剂包含以下溶剂中的一种或几种：
N-曱基吡咯烷酮溶剂、 N-乙基吡咯烷酮溶剂以及丁内酯溶剂。
其中， 溶剂重量占配向膜材料总重量的 80%至 99%。
其中， 的高聚物为分子量大于 10000的聚合物， 的低聚物为分子量小于 10000的聚合物。
其中， 配向膜材料进一步包含流平剂和消泡剂。
实施本发明实施例， 具有如下的有益效果：
本发明实施例提供的配合膜材料， 其至少包含一种聚合物， 该聚合物的 侧链上包含基团含有二苯曱酮的结构， 由于二苯曱酮的结构对 UV光非常敏 感， 能在较宽频谱范围内吸收 UV光能量， 分解形成自由基， 引发 monomer 发生聚合反应， 提高 monomer的反应速率和转化效率。 同时， 该结构基团 上连接有曱基丙烯酸酯基团， 它本身可以发生聚合反应， 所以由其产生的自 由基或带电分子碎片能够参与聚合反应， 连接到聚合物中， 不会因此造成离 子浓度过高的问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面 描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明的一种聚合物稳定垂直配向液晶显示面板的示意图。
具体实施方式
下述结合附图， 对本发明的具体实施方式进行说明。
如图 1所示， 示出了本发明的一种聚合物稳定垂直配向液晶显示面板的 示意图， 该液晶显示面板用于 PSVA LCD, 其包括：
第一透明基板 1 , 具有第一配向膜 50;
第二透明基板 2、 具有第二配向膜 51 ; 液晶组合物 3 , 填充于第一透明基板 1及第二透明基板 2之间， 且液晶 组合物 3接触第一配向膜 50及第二配向膜 51 , 液晶组合物中至少包含有液 晶分子 30, 以及可聚合单体， 在第一配向膜 50和第二配向膜 51的作用下， 该可聚合单体会在靠近第一基板 1及第二基板 2处形成 Bump (隆起物） 31 ; 以及
将液晶封于两基板内的边框胶材 4;
其中， 第一配向膜和第二配向膜所采用的材料包括：
高聚物、低聚物和溶剂， 其中， 所高聚物或 /和低聚物中包含如下基团结 构：
Figure imgf000006_0001
其中， 该基团结构包括二苯曱酮的结构， 且连接有曱基丙烯酸酯基团； X代表取代基团，在不同位置上的取代基团 X相互独立，可以相同或不相同； m为每个苯环结构上取代基 X的个数， 各苯环上取代基个数 m相互独立， 可相同或不同。
其中， 溶剂包含以下溶剂中的一种或几种：
N-曱基吡咯烷酮溶剂 （NMP )、 N-乙基吡咯烷酮溶剂 （NEP ) 以及丁内 酯（ Gamma-BL )溶剂， 且溶剂重量占配向膜材料总重量的 80%至 99%。 的 高聚物为分子量大于 10000的聚合物， 的低聚物为分子量小于 10000的聚合 物。
另外配向膜材料进一步包含流平剂和消泡剂。
本发明实施例提供的配合膜材料， 其至少包含一种聚合物， 该聚合物的 侧链上包含基团含有二苯曱酮的结构， 由于二苯曱酮的结构对紫外光非常敏 感， 能在较宽频谱范围内吸收紫外光能量， 分解形成自由基， 引发可聚合单 体发生聚合反应， 提高可聚合单体的反应速率和转化效率。 同时， 该结构基 团上连接有曱基丙烯酸酯基团， 它本身可以发生聚合反应， 所以由其产生的 自由基或带电分子碎片能够参与聚合反应， 连接到聚合物中， 不会因此造成 离子浓度过高的问题。
本发明实话例通过采用配向膜材料来调控 PSVA液晶混合物中可聚合单 体的反应速率与可聚合单体残留量， 控制液晶面板中的可移动离子含量， 以 此提高液晶面板的品质可靠性。
以上所揭露的仅为本发明较佳实施例而已， 当然不能以此来限定本发明 之权利范围， 因此等同变化， 仍属本发明所涵盖的范围。

Claims

权 利 要 求
1、 一种配向膜材料， 其用于聚合物稳定垂直配向液晶显示器， 其特征 在于， 所述配向膜材料包括： 高聚物、 低聚物和溶剂， 其中， 所高聚物或 / 和
Figure imgf000008_0001
其中， X代表取代基团， 在不同位置上的所述取代基团 X相互独立， 可 以相同或不相同； m代表每个苯环结构上取代基 X的个数，所述各苯环上取 代基个数 m相互独立， 可相同或不同；
所述溶剂包含以下溶剂中的一种或几种： N-曱基吡咯烷酮溶剂、 N-乙基 吡咯烷酮溶剂以及丁内酯溶剂；且所述溶剂重量占配向膜材料总重量的 80% 至 99%。
2、 如权利要求 1 所述的配向膜材料， 其特征在于， 所述的高聚物为分 子量大于 10000的聚合物， 所述的低聚物为分子量小于 10000的聚合物。
3、 如权利要求 2所述的配向膜材料， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
4、 一种配向膜材料， 其用于聚合物稳定垂直配向液晶显示器， 其特征 在于， 所述配向膜材料包括： 高聚物、 低聚物和溶剂， 其中， 所高聚物或 / 和
Figure imgf000008_0002
其中， X代表取代基团， 在不同位置上的所述取代基团 X相互独立， 可 以相同或不相同； m代表每个苯环结构上取代基 X的个数，所述各苯环上取 代基个数 m相互独立， 可相同或不同。
5、 如权利要求 4所述的配向膜材料， 其特征在于， 所述溶剂包含以下 溶剂中的一种或几种：
N-曱基吡咯烷酮溶剂、 N-乙基吡咯烷酮溶剂以及丁内酯溶剂。
6、 如权利要求 5所述的配向膜材料， 其特征在于， 所述溶剂重量占配 向膜材料总重量的 80%至 99%。
7、 如权利要求 6所述的配向膜材料， 其特征在于， 所述的高聚物为分 子量大于 10000的聚合物， 所述的低聚物为分子量小于 10000的聚合物。
8、 如权利要求 4所述的配向膜材料， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
9、 如权利要求 5所述的配向膜材料， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
10、 如权利要求 6所述的配向膜材料， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
11、 如权利要求 7所述的配向膜材料， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
12、 一种液晶面板， 其特征在于， 所述液晶面板包含：
第一透明基板， 具有第一配向膜；
第二透明基板， 具有第二配向膜； 以及
液晶组合物， 填充于所述第一透明基板及第二透明基板之间， 且所述液 晶组合物接触所述第一配向膜及第二配向膜；
其中， 所述配向膜的材料包括： 高聚物、 低聚物和溶剂， 所高聚物或 / 和
Figure imgf000009_0001
其中， X代表取代基团， 在不同位置上的所述取代基团 X相互独立， 可 以相同或不相同； m代表每个苯环结构上取代基 X的个数，所述各苯环上取 代基个数 m相互独立， 可相同或不同。
13、 如权利要求 12所述的液晶面板， 其特征在于， 所述溶剂包含以下 溶剂中的一种或几种：
N-曱基吡咯烷酮溶剂、 N-乙基吡咯烷酮溶剂以及丁内酯溶剂。
14、 如权利要求 13所述的液晶面板， 其特征在于， 所述溶剂重量占配 向膜材料总重量的 80%至 99%。
15、 如权利要求 14所述的液晶面板， 其特征在于， 所述的高聚物为分 子量大于 10000的聚合物， 所述的低聚物为分子量小于 10000的聚合物。
16、 如权利要求 12所述的液晶面板， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
17、 如权利要求 13所述的液晶面板， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
18、 如权利要求 14所述的液晶面板， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
19、 如权利要求 15所述的液晶面板， 其特征在于， 所述配向膜材料进 一步包含流平剂和消泡剂。
PCT/CN2013/071229 2013-01-25 2013-01-31 一种配向膜材料及相应的液晶面板 WO2014114012A1 (zh)

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