WO2020186569A1 - Liquid crystal material and liquid crystal display panel - Google Patents

Liquid crystal material and liquid crystal display panel Download PDF

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Publication number
WO2020186569A1
WO2020186569A1 PCT/CN2019/081598 CN2019081598W WO2020186569A1 WO 2020186569 A1 WO2020186569 A1 WO 2020186569A1 CN 2019081598 W CN2019081598 W CN 2019081598W WO 2020186569 A1 WO2020186569 A1 WO 2020186569A1
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Prior art keywords
liquid crystal
crystal material
density
temperature
display panel
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PCT/CN2019/081598
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French (fr)
Chinese (zh)
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罗国仁
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深圳市华星光电技术有限公司
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Publication of WO2020186569A1 publication Critical patent/WO2020186569A1/en

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/52Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/52Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54Additives having no specific mesophase characterised by their chemical composition
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/52Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54Additives having no specific mesophase characterised by their chemical composition
    • C09K19/56Aligning agents
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods

Definitions

  • the present invention relates to the field of display technology, in particular to a liquid crystal material and a liquid crystal display panel.
  • LCD Liquid Crystal Display
  • liquid crystal display devices which include a liquid crystal display panel and a backlight module.
  • the working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates. The liquid crystal molecules are controlled to change direction by powering on or not, and the light of the backlight module Refraction produces a picture.
  • the liquid crystal display panel consists of a color film substrate (CF, Color Filter), a thin film transistor substrate (TFT, Thin Film Transistor), liquid crystal (LC, Liquid Crystal) and sealant (Sealant) sandwiched between the color film substrate and the thin film transistor substrate.
  • the molding process generally includes: the front-end array (Array) process (film, yellow light, etching And peeling), the middle-stage cell process (the bonding of the TFT substrate and the CF substrate) and the back-end module assembly process (the pressing of the driver IC and the printed circuit board).
  • the front Array process is mainly to form TFT substrates to control the movement of liquid crystal molecules;
  • the middle Cell process is mainly to add liquid crystal between the TFT substrate and the CF substrate;
  • the back module assembly process is mainly to drive IC pressing and printed circuits The integration of the board drives the rotation of the liquid crystal molecules to display images.
  • the thermal expansion of the liquid crystal in the liquid crystal display panel is significantly greater than that of other components, which causes the cell thickness of the liquid crystal cell assembly to increase, and other parts cannot thermally expand to a corresponding degree, which easily causes the liquid crystal in the vertically placed liquid crystal display panel due to gravity.
  • the purpose of the present invention is to provide a liquid crystal material, which can increase the control range of the amount of liquid crystal, reduce product defects, and improve product quality.
  • the purpose of the present invention is also to provide a liquid crystal display panel, which can increase the control range of liquid crystal volume, reduce product defects, and improve product quality.
  • the present invention provides a liquid crystal material comprising a mixed liquid crystal matrix and a thermal stabilizer, the concentration of the thermal stabilizer is greater than 50 PPM and less than 3000 PPM.
  • the heat stabilizer is a hindered phenolic material.
  • the curvature range of the density of the liquid crystal material with temperature changes is -0.08% to 0;
  • the liquid crystal material also includes at least one reactive monomer.
  • the structure of the reactive monomer is a first group connected with at least one acrylate group, and the first group is a group formed by directly or indirectly connecting 2 to 4 benzene rings or a naphthalene ring.
  • the present invention also provides a liquid crystal display panel, which includes an upper substrate and a lower substrate which are arranged oppositely, and a liquid crystal layer arranged between the upper substrate and the lower substrate;
  • the liquid crystal material used in the liquid crystal layer includes a mixed liquid crystal matrix and a thermal stabilizer, and the concentration of the thermal stabilizer is greater than 50 PPM and less than 3000 PPM.
  • the heat stabilizer is a hindered phenolic material.
  • the curvature range of the density of the liquid crystal material with temperature changes is -0.08% to 0;
  • the liquid crystal display panel further includes at least one reactive monomer.
  • the structure of the reactive monomer is a first group connected with at least one acrylate group, and the first group is a group formed by directly or indirectly connecting 2 to 4 benzene rings or a naphthalene ring.
  • the present invention provides a liquid crystal material, including a mixed liquid crystal matrix and a thermal stabilizer, the concentration of the thermal stabilizer is greater than 50PPM and less than 3000PPM, by adding a concentration greater than 50PPM and less than 3000PPM to the liquid crystal material
  • the thermal stabilizer can make the density of the liquid crystal material change with temperature at a slower rate than the density of the existing liquid crystal material.
  • the application of the liquid crystal material to the liquid crystal display panel can reduce the temperature change.
  • the volume change of the liquid crystal material in the liquid crystal cell increases the control range of the liquid crystal volume, reduces product defects, and improves product quality.
  • the invention provides a liquid crystal display panel, which can increase the control range of liquid crystal quantity, reduce product defects and improve product quality.
  • FIG. 1 is a schematic diagram of a liquid crystal display panel of the present invention
  • FIG. 2 is a schematic diagram of the comparison between the density curve of the liquid crystal material of the present invention and the temperature curve of the existing liquid crystal material.
  • the present invention provides a liquid crystal material, including a mixed liquid crystal matrix and a thermal stabilizer;
  • the liquid crystal matrix and the heat stabilizer are mixed to form a solution, and the concentration of the heat stabilizer in the solution is greater than 50PPM And less than 3000PPM .
  • the thermal stabilizer is a hindered phenolic material
  • the liquid crystal matrix is a negative liquid crystal
  • the liquid crystal matrix and the thermal stabilizer are both dissolved in the solvent to form a solution.
  • the thermal stabilizer is added to the liquid crystal material and the concentration of the thermal stabilizer is controlled to be greater than 50PPM And less than 3000PPM , which can make the density of the liquid crystal material change with temperature at a slower speed than that of the existing liquid crystal material, thereby reducing the change in the volume of the liquid crystal material in the liquid crystal cell caused by the temperature change and improving LC Margin , Avoid low temperature bubble And high temperature G mura , Reduce product defects and improve product quality.
  • Middle curve A1 Is the curve of the density of the liquid crystal material of the present invention with temperature
  • the curve B1 Is the density curve of the existing liquid crystal material with temperature, in -20 °C ⁇ 60
  • the density of the liquid crystal material of the present invention varies with temperature and the curvature range is -0.08% ⁇ 0 , According to the picture 2 It can be seen that, compared with the prior art, the density of the liquid crystal material of the present invention changes with temperature at a slower speed than the prior art, so the liquid crystal material of the present invention has a smaller volume change due to temperature changes than the prior art.
  • the liquid crystal material is a photoreactive liquid crystal material, which further includes at least one reactive monomer.
  • the structure of the reactive monomer is a first group with at least one acrylate group attached, and the first group is 2 ⁇ 4 A group formed by directly or indirectly connecting a benzene ring or a naphthalene ring; wherein, the 2 ⁇ 4
  • the indirect connection of a benzene ring specifically refers to 2 ⁇ 4
  • Each benzene ring is connected indirectly through a group.
  • the at least one acrylate is directly connected to the first group, and the first group may be further connected to other polymerizable groups besides the acrylate, that is, the reaction
  • the structure of the sexual monomer is formed by directly connecting at least one polymerizable group to the first group, and at least one of the at least one polymerizable group is an acrylate group.
  • the present invention also provides a liquid crystal display panel, which includes oppositely arranged upper substrates 1 And lower substrate 2 And on the upper substrate 1 And lower substrate 2 Liquid crystal layer 3 ;
  • the liquid crystal layer 3 The liquid crystal materials used include mixed liquid crystal matrix and thermal stabilizer;
  • the liquid crystal matrix and the heat stabilizer are mixed to form a solution, and the concentration of the heat stabilizer in the solution is greater than 50PPM And less than 3000PPM .
  • the thermal stabilizer is a hindered phenolic material
  • the liquid crystal matrix is a negative liquid crystal
  • the liquid crystal matrix and the thermal stabilizer are both dissolved in the solvent to form a solution.
  • the thermal stabilizer is added to the liquid crystal material and the concentration of the thermal stabilizer is controlled to be greater than 50PPM And less than 3000PPM , which can make the density of the liquid crystal material change with temperature at a slower speed than that of the existing liquid crystal material, thereby reducing the change in the volume of the liquid crystal material in the liquid crystal cell caused by the temperature change and improving LC Margin , Avoid low temperature bubble And high temperature G mura , Reduce product defects and improve product quality.
  • Middle curve A1 Is the curve of the density of the liquid crystal material of the present invention with temperature
  • the curve B1 Is the density curve of the existing liquid crystal material with temperature, in -20 °C ⁇ 60
  • the density of the liquid crystal material of the present invention varies with temperature and the curvature range is -0.08% ⁇ 0 , According to the picture 2 It can be seen that, compared with the prior art, the density of the liquid crystal material of the present invention changes with temperature at a slower speed than the prior art, so the liquid crystal material of the present invention has a smaller volume change due to temperature changes than the prior art.
  • the liquid crystal material is a photoreactive liquid crystal material, which further includes at least one reactive monomer.
  • the structure of the reactive monomer is a first group with at least one acrylate group attached, and the first group is 2 ⁇ 4 A group formed by directly or indirectly connecting a benzene ring or a naphthalene ring; wherein, the 2 ⁇ 4
  • the indirect connection of a benzene ring specifically refers to 2 ⁇ 4
  • Each benzene ring is connected indirectly through a group.
  • the at least one acrylate is directly connected to the first group, and the first group may be further connected to other polymerizable groups besides the acrylate, that is, the reaction
  • the structure of the sexual monomer is formed by directly connecting at least one polymerizable group to the first group, and at least one of the at least one polymerizable group is an acrylate group.
  • the upper substrate is a color filter substrate, on which a color filter layer, a black matrix separating the color filter layers and a black matrix are provided on the color filter layer and
  • the lower substrate is an array substrate, and the TFT Array and the TFT Pixel electrodes electrically connected to the array.
  • the present invention provides a liquid crystal material comprising a mixed liquid crystal matrix and a thermal stabilizer, the concentration of the thermal stabilizer is greater than 50PPM And less than 3000PPM , By adding a concentration greater than 50PPM And less than 3000PPM
  • the thermal stabilizer can make the density of the liquid crystal material change with temperature more slowly than that of the existing liquid crystal material.
  • the application of this liquid crystal material to the liquid crystal display panel can reduce the temperature change.
  • the resulting change in the volume of the liquid crystal material in the liquid crystal cell increases the control range of the liquid crystal volume, reduces product defects, and improves product quality.
  • the invention provides a liquid crystal display panel, which can increase the control range of liquid crystal quantity, reduce product defects and improve product quality.

Abstract

The present invention provides a liquid crystal material and a liquid crystal display panel. The liquid crystal material comprises a mixed liquid crystal matrix and a heat stabilizer, wherein the concentration of the heat stabilizer is greater than 50 PPM and is less than 3,000 PPM; by adding the heat stabilizer with the concentration being greater than 50 PPM and less than 3,000 PPM into the liquid crystal material, the density of the present liquid crystal material changes more slowly along with changes in temperature than does the liquid crystal material of the prior art; when the liquid crystal material is applied to the liquid crystal display panel, a change in a volume of the liquid crystal material in a liquid crystal box caused by a temperature change can be reduced, so that a liquid crystal quantity control range is improved, product defects are reduced, and the product quality is improved.

Description

液晶材料及液晶显示面板Liquid crystal material and liquid crystal display panel 技术领域Technical field
本发明涉及显示技术领域,尤其涉及一种液晶材料及液晶显示面板。The present invention relates to the field of display technology, in particular to a liquid crystal material and a liquid crystal display panel.
背景技术Background technique
随着显示技术的发展,液晶显示器(Liquid Crystal Display,LCD)等平面显示装置因具有高画质、省电、机身薄及应用范围广等优点,而被广泛的应用于手机、电视、个人数字助理、数字相机、笔记本电脑、台式计算机等各种消费性电子产品,成为显示装置中的主流。With the development of display technology, flat-panel display devices such as Liquid Crystal Display (LCD) have been widely used in mobile phones, TVs, and personal computers due to their advantages of high image quality, power saving, thin body and wide application range. Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices.
现有市场上的液晶显示装置大部分为背光型液晶显示器,其包括液晶显示面板及背光模组(backlight module)。液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子,两片玻璃基板中间有许多垂直和水平的细小电线,通过通电与否来控制液晶分子改变方向,将背光模组的光线折射出来产生画面。Most of the liquid crystal display devices currently on the market are backlit liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates. The liquid crystal molecules are controlled to change direction by powering on or not, and the light of the backlight module Refraction produces a picture.
通常液晶显示面板由彩膜基板(CF,Color Filter)、薄膜晶体管基板(TFT,Thin Film Transistor)、夹于彩膜基板与薄膜晶体管基板之间的液晶(LC,Liquid Crystal)及密封胶框(Sealant)组成,其成型工艺一般包括:前段阵列(Array)制程(薄膜、黄光、蚀刻及剥膜)、中段成盒(Cell)制程(TFT基板与CF基板贴合)及后段模组组装制程(驱动IC与印刷电路板压合)。其中,前段Array制程主要是形成TFT基板,以便于控制液晶分子的运动;中段Cell制程主要是在TFT基板与CF基板之间添加液晶;后段模组组装制程主要是驱动IC压合与印刷电路板的整合,进而驱动液晶分子转动,显示图像。Usually the liquid crystal display panel consists of a color film substrate (CF, Color Filter), a thin film transistor substrate (TFT, Thin Film Transistor), liquid crystal (LC, Liquid Crystal) and sealant (Sealant) sandwiched between the color film substrate and the thin film transistor substrate. The molding process generally includes: the front-end array (Array) process (film, yellow light, etching And peeling), the middle-stage cell process (the bonding of the TFT substrate and the CF substrate) and the back-end module assembly process (the pressing of the driver IC and the printed circuit board). Among them, the front Array process is mainly to form TFT substrates to control the movement of liquid crystal molecules; the middle Cell process is mainly to add liquid crystal between the TFT substrate and the CF substrate; the back module assembly process is mainly to drive IC pressing and printed circuits The integration of the board drives the rotation of the liquid crystal molecules to display images.
在高温条件下,液晶显示面板中的液晶的热膨胀显著大于其它部件,导致液晶盒组件的盒厚增大,其他部分不能发生相应程度地热膨胀,容易导致竖直放置的液晶显示面板中液晶由于重力作用而整体向下流动,产生高温下重力显示不均匀 (Gravity mura,G mura) 缺陷,而在低温状态下,液晶的热收缩又大于其它部件,即在仍然保持液晶盒的盒厚不变的情况下,液晶将不能充满整个液晶盒组件而出现真空气泡,产生低温气泡 (bubble) 缺陷。这缺陷限制了液晶显示设备的应用条件,影响了液晶显示设备的显示效果,进而降低了用 户体验感。在制作工艺中,在不发生高温下重力显示不均匀缺陷和低温下气泡缺陷情况下所允许的液晶量控制范围称为LC Margin(Liquid Crystal Margin)。Under high temperature conditions, the thermal expansion of the liquid crystal in the liquid crystal display panel is significantly greater than that of other components, which causes the cell thickness of the liquid crystal cell assembly to increase, and other parts cannot thermally expand to a corresponding degree, which easily causes the liquid crystal in the vertically placed liquid crystal display panel due to gravity. The effect and the whole downward flow, resulting in uneven gravity display under high temperature (Gravity mura, G mura) defect, and in the low temperature state, the thermal shrinkage of the liquid crystal is greater than that of other parts, that is, the liquid crystal will not be able to fill the entire liquid crystal cell assembly and a vacuum occurs when the cell thickness of the liquid crystal cell is still maintained. Bubbles, producing low temperature bubbles (bubble) Defects. This defect limits the application conditions of the liquid crystal display device, affects the display effect of the liquid crystal display device, and thereby reduces the user experience. In the manufacturing process, the allowable liquid crystal volume control range without occurrence of uneven gravity display defects at high temperatures and bubble defects at low temperatures is called LC Margin (Liquid Crystal Margin).
技术问题technical problem
本发明的目的在于提供一种液晶材料,能够提升液晶量控制范围,减少产品缺陷,改善产品质量。The purpose of the present invention is to provide a liquid crystal material, which can increase the control range of the amount of liquid crystal, reduce product defects, and improve product quality.
本发明的目的还在于提供一种液晶显示面板,能够提升液晶量控制范围,减少产品缺陷,改善产品质量。The purpose of the present invention is also to provide a liquid crystal display panel, which can increase the control range of liquid crystal volume, reduce product defects, and improve product quality.
技术解决方案Technical solutions
为实现上述目的,本发明提供了一种液晶材料,包括混合的液晶母体及热稳定剂,所述热稳定剂的浓度大于50PPM且小于3000PPM。In order to achieve the above objective, the present invention provides a liquid crystal material comprising a mixed liquid crystal matrix and a thermal stabilizer, the concentration of the thermal stabilizer is greater than 50 PPM and less than 3000 PPM.
所述热稳定剂为受阻酚类材料。The heat stabilizer is a hindered phenolic material.
在-20℃~60℃的温度范围内,所述液晶材料的密度随温度变化的曲率范围为-0.08%~0;In the temperature range of -20°C to 60°C, the curvature range of the density of the liquid crystal material with temperature changes is -0.08% to 0;
其中,所述液晶材料的密度随温度变化的曲率的计算公式为:R=(A-B)/80,R为液晶材料的密度随温度变化的曲率,A为液晶材料在60℃下的密度,B为液晶材料在-20℃下的密度,A小于B。Wherein, the formula for calculating the curvature of the density of the liquid crystal material with temperature is: R=(AB)/80, R is the curvature of the density of the liquid crystal material with temperature, A is the density of the liquid crystal material at 60°C, B Is the density of the liquid crystal material at -20°C, A is less than B.
所述液晶材料还包括至少一种反应性单体。The liquid crystal material also includes at least one reactive monomer.
所述反应性单体的结构为至少连接有一丙烯酸酯基的第一基团,所述第一基团为2~4个苯环直接或间接相连形成的基团或为一个萘环。 The structure of the reactive monomer is a first group connected with at least one acrylate group, and the first group is a group formed by directly or indirectly connecting 2 to 4 benzene rings or a naphthalene ring.
本发明还提供一种液晶显示面板,包括相对设置的上基板及下基板以及设于所述上基板和下基板之间的液晶层;The present invention also provides a liquid crystal display panel, which includes an upper substrate and a lower substrate which are arranged oppositely, and a liquid crystal layer arranged between the upper substrate and the lower substrate;
所述液晶层采用的液晶材料包括混合的液晶母体及热稳定剂,所述热稳定剂的浓度大于50PPM且小于3000PPM。The liquid crystal material used in the liquid crystal layer includes a mixed liquid crystal matrix and a thermal stabilizer, and the concentration of the thermal stabilizer is greater than 50 PPM and less than 3000 PPM.
所述热稳定剂为受阻酚类材料。The heat stabilizer is a hindered phenolic material.
在-20℃~60℃的温度范围内,所述液晶材料的密度随温度变化的曲率范围为-0.08%~0;In the temperature range of -20°C to 60°C, the curvature range of the density of the liquid crystal material with temperature changes is -0.08% to 0;
其中,所述液晶材料的密度随温度变化的曲率的计算公式为:R=(A-B)/80,R为液晶材料的密度随温度变化的曲率,A为液晶材料在60℃下的密度,B为液晶材料在-20℃下的密度,A小于B。Wherein, the formula for calculating the curvature of the density of the liquid crystal material with temperature is: R=(AB)/80, R is the curvature of the density of the liquid crystal material with temperature, A is the density of the liquid crystal material at 60°C, B Is the density of the liquid crystal material at -20°C, A is less than B.
所述液晶显示面板还包括至少一种反应性单体。The liquid crystal display panel further includes at least one reactive monomer.
所述反应性单体的结构为至少连接有一丙烯酸酯基的第一基团,所述第一基团为2~4苯环直接或间接相连形成的基团或为一个萘环。 The structure of the reactive monomer is a first group connected with at least one acrylate group, and the first group is a group formed by directly or indirectly connecting 2 to 4 benzene rings or a naphthalene ring.
有益效果Beneficial effect
本发明的有益效果:本发明提供一种液晶材料,包括混合的液晶母体及热稳定剂,所述热稳定剂的浓度大于50PPM且小于3000PPM,通过在液晶材料中加入浓度大于50PPM且小于3000PPM的热稳定剂,能够使得液晶材料的密度随温度变化的速度相比于现有的液晶材料的密度随温度变化的速度更慢,将该液晶材料应用到液晶显示面板中,能够减少因温度变化导致的液晶盒内液晶材料的体积的变化,提升液晶量控制范围,减少产品缺陷,改善产品质量。本发明提供一种液晶显示面板,能够提升液晶量控制范围,减少产品缺陷,改善产品质量。The beneficial effects of the present invention: the present invention provides a liquid crystal material, including a mixed liquid crystal matrix and a thermal stabilizer, the concentration of the thermal stabilizer is greater than 50PPM and less than 3000PPM, by adding a concentration greater than 50PPM and less than 3000PPM to the liquid crystal material The thermal stabilizer can make the density of the liquid crystal material change with temperature at a slower rate than the density of the existing liquid crystal material. The application of the liquid crystal material to the liquid crystal display panel can reduce the temperature change. The volume change of the liquid crystal material in the liquid crystal cell increases the control range of the liquid crystal volume, reduces product defects, and improves product quality. The invention provides a liquid crystal display panel, which can increase the control range of liquid crystal quantity, reduce product defects and improve product quality.
附图说明Description of the drawings
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。In order to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the accompanying drawings are only provided for reference and illustration and are not used to limit the present invention.
附图中,In the attached picture,
图1为本发明的液晶显示面板的示意图;FIG. 1 is a schematic diagram of a liquid crystal display panel of the present invention;
图2为本发明的液晶材料的密度随温度变化的曲线与现有液晶材料的密度随温度变化的曲线的比较示意图。2 is a schematic diagram of the comparison between the density curve of the liquid crystal material of the present invention and the temperature curve of the existing liquid crystal material.
本发明的实施方式Embodiments of the invention
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。In order to further explain the technical means adopted by the present invention and its effects, the following describes in detail the preferred embodiments of the present invention and the accompanying drawings.
请参阅图Please refer to the figure 11 ,本发明提供一种液晶材料,包括混合液晶母体及热稳定剂;, The present invention provides a liquid crystal material, including a mixed liquid crystal matrix and a thermal stabilizer;
具体地,所述液晶母体及热稳定剂混合形成溶液,在该溶液中所述热稳定剂的浓度大于Specifically, the liquid crystal matrix and the heat stabilizer are mixed to form a solution, and the concentration of the heat stabilizer in the solution is greater than 50PPM50PPM 且小于And less than 3000PPM3000PPM .
优选地,所述热稳定剂为受阻酚类材料,所述液晶母体为负性液晶。Preferably, the thermal stabilizer is a hindered phenolic material, and the liquid crystal matrix is a negative liquid crystal.
需要说明的是,所述液晶母体、热稳定剂均溶解于所述溶剂中形成一溶液,通过在液晶材料中增设热稳定剂,并控制所述热稳定剂的浓度大于It should be noted that the liquid crystal matrix and the thermal stabilizer are both dissolved in the solvent to form a solution. The thermal stabilizer is added to the liquid crystal material and the concentration of the thermal stabilizer is controlled to be greater than 50PPM50PPM 且小于And less than 3000PPM3000PPM ,能够使得该液晶材料的密度随温度变化的速度相比于现有的液晶材料的密度随温度变化的速度更慢,从而减少因温度变化导致的液晶盒内液晶材料的体积的变化,提升, Which can make the density of the liquid crystal material change with temperature at a slower speed than that of the existing liquid crystal material, thereby reducing the change in the volume of the liquid crystal material in the liquid crystal cell caused by the temperature change and improving LC MarginLC Margin ,避免低温, Avoid low temperature bubblebubble 及高温And high temperature G muraG mura ,减少产品缺陷,提升产品质量。, Reduce product defects and improve product quality.
如图As shown 22 所示,图As shown in the figure 22 中曲线Middle curve A1A1 为本发明的液晶材料的密度随温度变化的曲线,曲线Is the curve of the density of the liquid crystal material of the present invention with temperature, and the curve B1B1 为现有的液晶材料的密度随温度变化的曲线,在Is the density curve of the existing liquid crystal material with temperature, in -20-20 °C ~60~60 ℃的温度范围内,本发明的液晶材料的密度随温度变化的曲率范围为Within the temperature range of ℃, the density of the liquid crystal material of the present invention varies with temperature and the curvature range is -0.08%~0-0.08%~0 ,根据图, According to the picture 22 可知,相比于现有技术,本发明的液晶材料的密度随温度变化的速度比现有技术更慢,从而本发明的液晶材料因温度变化而导致的体积变化比现有技术更小。It can be seen that, compared with the prior art, the density of the liquid crystal material of the present invention changes with temperature at a slower speed than the prior art, so the liquid crystal material of the present invention has a smaller volume change due to temperature changes than the prior art.
需要说明的是,所述液晶材料的密度随温度变化的曲率的计算公式为:It should be noted that the calculation formula for the curvature of the density of the liquid crystal material as a function of temperature is: R=(A-B)/(60-(-20))= (A-B)/80R=(A-B)/(60-(-20))= (A-B)/80 , RR 为液晶材料的密度随温度变化的曲率,Is the curvature of the density of the liquid crystal material with temperature, AA 为液晶材料在For liquid crystal materials in 6060 ℃下的密度,Density at ℃, BB 为液晶材料在For liquid crystal materials in -20-20 ℃下的密度,Density at ℃, AA 小于Less than BB .
进一步地,在本发明的一些实施例中,所述液晶材料为光反应液晶材料,其还包括至少一种反应性单体。Further, in some embodiments of the present invention, the liquid crystal material is a photoreactive liquid crystal material, which further includes at least one reactive monomer.
具体地,所述反应性单体的结构为至少连接有一丙烯酸酯基的第一基团,所述第一基团为Specifically, the structure of the reactive monomer is a first group with at least one acrylate group attached, and the first group is 2~42~4 个苯环直接或间接相连形成的基团或为一个萘环;其中,所述A group formed by directly or indirectly connecting a benzene ring or a naphthalene ring; wherein, the 2~42~4 个苯环间接连接具体是指The indirect connection of a benzene ring specifically refers to 2~42~4 个苯环通过一个基团间接连接。Each benzene ring is connected indirectly through a group.
进一步地,所述至少一个丙烯酸酯直接连接在所述第一基团上,且所述第一基团还可以进一步连接除丙烯酸酯外的其他的可聚合基团,也就是说,所述反应性单体的结构由第一基团上直接连接至少一个可聚合基团构成,且该至少一个可聚合基团中至少有一个是丙烯酸酯基。Further, the at least one acrylate is directly connected to the first group, and the first group may be further connected to other polymerizable groups besides the acrylate, that is, the reaction The structure of the sexual monomer is formed by directly connecting at least one polymerizable group to the first group, and at least one of the at least one polymerizable group is an acrylate group.
请参阅图Please refer to the figure 11 ,基于上述的液晶材料,本发明还提供一种液晶显示面板,其包括相对设置的上基板Based on the above-mentioned liquid crystal material, the present invention also provides a liquid crystal display panel, which includes oppositely arranged upper substrates 11 及下基板And lower substrate 22 以及设于所述上基板And on the upper substrate 11 和下基板And lower substrate 22 之间的液晶层Liquid crystal layer 33
所述液晶层The liquid crystal layer 33 采用的液晶材料包括混合的液晶母体及热稳定剂;The liquid crystal materials used include mixed liquid crystal matrix and thermal stabilizer;
其中,所述液晶母体及热稳定剂混合形成溶液,在该溶液中所述热稳定剂的浓度大于Wherein, the liquid crystal matrix and the heat stabilizer are mixed to form a solution, and the concentration of the heat stabilizer in the solution is greater than 50PPM50PPM 且小于And less than 3000PPM3000PPM .
优选地,所述热稳定剂为受阻酚类材料,所述液晶母体为负性液晶。Preferably, the thermal stabilizer is a hindered phenolic material, and the liquid crystal matrix is a negative liquid crystal.
需要说明的是,所述液晶母体、热稳定剂均溶解于所述溶剂中形成一溶液,通过在液晶材料中增设热稳定剂,并控制所述热稳定剂的浓度大于It should be noted that the liquid crystal matrix and the thermal stabilizer are both dissolved in the solvent to form a solution. The thermal stabilizer is added to the liquid crystal material and the concentration of the thermal stabilizer is controlled to be greater than 50PPM50PPM 且小于And less than 3000PPM3000PPM ,能够使得该液晶材料的密度随温度变化的速度相比于现有的液晶材料的密度随温度变化的速度更慢,从而减少因温度变化导致的液晶盒内液晶材料的体积的变化,提升, Which can make the density of the liquid crystal material change with temperature at a slower speed than that of the existing liquid crystal material, thereby reducing the change in the volume of the liquid crystal material in the liquid crystal cell caused by the temperature change and improving LC MarginLC Margin ,避免低温, Avoid low temperature bubblebubble 及高温And high temperature G muraG mura ,减少产品缺陷,改善产品质量。, Reduce product defects and improve product quality.
如图As shown 22 所示,图As shown in the figure 22 中曲线Middle curve A1A1 为本发明的液晶材料的密度随温度变化的曲线,曲线Is the curve of the density of the liquid crystal material of the present invention with temperature, and the curve B1B1 为现有的液晶材料的密度随温度变化的曲线,在Is the density curve of the existing liquid crystal material with temperature, in -20-20 °C ~60~60 ℃的温度范围内,本发明的液晶材料的密度随温度变化的曲率范围为Within the temperature range of ℃, the density of the liquid crystal material of the present invention varies with temperature and the curvature range is -0.08%~0-0.08%~0 ,根据图, According to the picture 22 可知,相比于现有技术,本发明的液晶材料的密度随温度变化的速度比现有技术更慢,从而本发明的液晶材料因温度变化而导致的体积变化比现有技术更小。需要说明的是,所述液晶材料的密度随温度变化的曲率的计算公式为:It can be seen that, compared with the prior art, the density of the liquid crystal material of the present invention changes with temperature at a slower speed than the prior art, so the liquid crystal material of the present invention has a smaller volume change due to temperature changes than the prior art. It should be noted that the calculation formula for the curvature of the density of the liquid crystal material as a function of temperature is: R=(A-B)/(60-(-20))= (A-B)/80R=(A-B)/(60-(-20))= (A-B)/80 , RR 为液晶材料的密度随温度变化的曲率,Is the curvature of the density of the liquid crystal material with temperature, AA 为液晶材料在For liquid crystal materials in 6060 ℃下的密度,Density at ℃, BB 为液晶材料在For liquid crystal materials in -20-20 ℃下的密度,Density at ℃, AA 小于Less than BB .
进一步地,在本发明的一些实施例中,所述液晶材料为光反应液晶材料,其还包括至少一种反应性单体。Further, in some embodiments of the present invention, the liquid crystal material is a photoreactive liquid crystal material, which further includes at least one reactive monomer.
具体地,所述反应性单体的结构为至少连接有一丙烯酸酯基的第一基团,所述第一基团为Specifically, the structure of the reactive monomer is a first group with at least one acrylate group attached, and the first group is 2~42~4 个苯环直接或间接相连形成的基团或为一个萘环;其中,所述A group formed by directly or indirectly connecting a benzene ring or a naphthalene ring; wherein, the 2~42~4 个苯环间接连接具体是指The indirect connection of a benzene ring specifically refers to 2~42~4 个苯环通过一个基团间接连接。Each benzene ring is connected indirectly through a group.
进一步地,所述至少一个丙烯酸酯直接连接在所述第一基团上,且所述第一基团还可以进一步连接除丙烯酸酯外的其他的可聚合基团,也就是说,所述反应性单体的结构由第一基团上直接连接至少一个可聚合基团构成,且该至少一个可聚合基团中至少有一个是丙烯酸酯基。Further, the at least one acrylate is directly connected to the first group, and the first group may be further connected to other polymerizable groups besides the acrylate, that is, the reaction The structure of the sexual monomer is formed by directly connecting at least one polymerizable group to the first group, and at least one of the at least one polymerizable group is an acrylate group.
具体地,在本发明的一些实施例中,所述上基板为彩膜基板,其上设有彩色滤光层、分隔所述彩色滤光层的黑色矩阵及设于所述彩色滤光层及黑色矩阵上的公共电极,所述下基板为阵列基板,其上设有Specifically, in some embodiments of the present invention, the upper substrate is a color filter substrate, on which a color filter layer, a black matrix separating the color filter layers and a black matrix are provided on the color filter layer and The common electrode on the black matrix, the lower substrate is an array substrate, and the TFTTFT 阵列及与所述Array and the TFTTFT 阵列电性连接的像素电极。Pixel electrodes electrically connected to the array.
综上所述,本发明提供一种液晶材料,包括混合的液晶母体及热稳定剂,所述热稳定剂的浓度大于In summary, the present invention provides a liquid crystal material comprising a mixed liquid crystal matrix and a thermal stabilizer, the concentration of the thermal stabilizer is greater than 50PPM50PPM 且小于And less than 3000PPM3000PPM ,通过在液晶材料中加入浓度大于, By adding a concentration greater than 50PPM50PPM 且小于And less than 3000PPM3000PPM 的热稳定剂,能够使得液晶材料的密度随温度变化的速度相比于现有的液晶材料的密度随温度变化的速度更慢,将该液晶材料应用到液晶显示面板中,能够减少因温度变化导致的液晶盒内液晶材料的体积的变化,提升液晶量控制范围,减少产品缺陷,改善产品质量。本发明提供一种液晶显示面板,能够提升液晶量控制范围,减少产品缺陷,改善产品质量。The thermal stabilizer can make the density of the liquid crystal material change with temperature more slowly than that of the existing liquid crystal material. The application of this liquid crystal material to the liquid crystal display panel can reduce the temperature change. The resulting change in the volume of the liquid crystal material in the liquid crystal cell increases the control range of the liquid crystal volume, reduces product defects, and improves product quality. The invention provides a liquid crystal display panel, which can increase the control range of liquid crystal quantity, reduce product defects and improve product quality.
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。As mentioned above, for those of ordinary skill in the art, various other corresponding changes and modifications can be made according to the technical solutions and technical ideas of the present invention, and all these changes and modifications shall fall within the protection scope of the claims of the present invention. .

Claims (10)

  1. 一种液晶材料,包括混合的液晶母体及热稳定剂,所述热稳定剂的浓度大于50PPM且小于3000PPM。A liquid crystal material includes a mixed liquid crystal matrix and a thermal stabilizer, the concentration of the thermal stabilizer is greater than 50 PPM and less than 3000 PPM.
  2. 如权利要求1所述的液晶材料,其中,所述热稳定剂为受阻酚类材料。8. The liquid crystal material of claim 1, wherein the thermal stabilizer is a hindered phenolic material.
  3. 如权利要求1所述的液晶材料,在-20℃~60℃的温度范围内,密度随温度变化的曲率范围为-0.08%~0;The liquid crystal material according to claim 1, in the temperature range of -20°C to 60°C, the curvature range of density changing with temperature is -0.08% to 0;
    其中,所述液晶材料的密度随温度变化的曲率的计算公式为:R=(A-B)/80,R为液晶材料的密度随温度变化的曲率,A为液晶材料在60℃下的密度,B为液晶材料在-20℃下的密度,A小于B。Wherein, the formula for calculating the curvature of the density of the liquid crystal material with temperature is: R=(AB)/80, R is the curvature of the density of the liquid crystal material with temperature, A is the density of the liquid crystal material at 60°C, B Is the density of the liquid crystal material at -20°C, A is less than B.
  4. 如权利要求1所述的液晶材料,还包括至少一种反应性单体。The liquid crystal material of claim 1, further comprising at least one reactive monomer.
  5. 如权利要求4所述的液晶材料,其中,所述反应性单体的结构为至少连接有一丙烯酸酯基的第一基团,所述第一基团为2~4个苯环直接或间接相连形成的基团或为一个萘环。 The liquid crystal material of claim 4, wherein the structure of the reactive monomer is a first group connected with at least one acrylate group, and the first group is a direct or indirect connection of 2 to 4 benzene rings. The formed group may be a naphthalene ring.
  6. 一种液晶显示面板,包括相对设置的上基板及下基板以及设于所述上基板和下基板之间的液晶层;A liquid crystal display panel, comprising an upper substrate and a lower substrate arranged oppositely, and a liquid crystal layer arranged between the upper substrate and the lower substrate;
    所述液晶层采用的液晶材料包括混合的液晶母体及热稳定剂,所述热稳定剂的浓度大于50PPM且小于3000PPM。The liquid crystal material used in the liquid crystal layer includes a mixed liquid crystal matrix and a thermal stabilizer, and the concentration of the thermal stabilizer is greater than 50 PPM and less than 3000 PPM.
  7. 如权利要求1所述的液晶显示面板,其中,所述热稳定剂为受阻酚类材料。8. The liquid crystal display panel of claim 1, wherein the thermal stabilizer is a hindered phenolic material.
  8. 如权利要求1所述的液晶显示面板,其中,在-20℃~60℃的温度范围内,所述液晶材料的密度随温度变化的曲率范围为-0.08%~0;3. The liquid crystal display panel of claim 1, wherein, within a temperature range of -20°C to 60°C, the density of the liquid crystal material varies with temperature in a range of -0.08% to 0;
    其中,所述液晶材料的密度随温度变化的曲率的计算公式为:R=(A-B)/80,R为液晶材料的密度随温度变化的曲率,A为液晶材料在60℃下的密度,B为液晶材料在-20℃下的密度,A小于B。Wherein, the formula for calculating the curvature of the density of the liquid crystal material with temperature is: R=(AB)/80, R is the curvature of the density of the liquid crystal material with temperature, A is the density of the liquid crystal material at 60°C, B Is the density of the liquid crystal material at -20°C, A is less than B.
  9. 如权利要求1所述的液晶显示面板,还包括至少一种反应性单体。5. The liquid crystal display panel of claim 1, further comprising at least one reactive monomer.
  10. 如权利要求9所述的液晶显示面板,其中,所述反应性单体的结构为至少连接有一丙烯酸酯基的第一基团,所述第一基团为2~4苯环直接或间接相连形成的基团或为一个萘环。The liquid crystal display panel of claim 9, wherein the structure of the reactive monomer is a first group connected with at least one acrylate group, and the first group is directly or indirectly connected to 2~4 benzene rings. The formed group may be a naphthalene ring.
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