WO2017035873A1 - 液晶面板的制造方法 - Google Patents

液晶面板的制造方法 Download PDF

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Publication number
WO2017035873A1
WO2017035873A1 PCT/CN2015/089860 CN2015089860W WO2017035873A1 WO 2017035873 A1 WO2017035873 A1 WO 2017035873A1 CN 2015089860 W CN2015089860 W CN 2015089860W WO 2017035873 A1 WO2017035873 A1 WO 2017035873A1
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WIPO (PCT)
Prior art keywords
liquid crystal
alignment film
crystal panel
pretilt angle
manufacturing
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Ceased
Application number
PCT/CN2015/089860
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English (en)
French (fr)
Inventor
宋彦君
谢忠憬
赵永超
李祥
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/895,655 priority Critical patent/US9846333B2/en
Publication of WO2017035873A1 publication Critical patent/WO2017035873A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • 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
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • G02F1/133761—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different pretilt angles
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
    • 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 a method of fabricating a liquid crystal panel, and more particularly to an in-plane lateral electric field switch having a wide viewing angle (In-Plane) Switch, IPS) Manufacturing method of liquid crystal panel or Fringe Field Switching (FFS) liquid crystal panel.
  • In-Plane In-Plane
  • IPS wide viewing angle
  • FFS Fringe Field Switching
  • liquid crystal display utilizes the electro-optic effect of the liquid crystal, controls the transmittance and reflectivity of the liquid crystal molecules through the circuit, and controls the intensity of the light transmission color resistance emitted by the backlight module to realize image display of different gray levels and different colors.
  • VA vertical alignment
  • the main object of the present invention is to provide a method for manufacturing a liquid crystal panel, which combines the advantages of a polymer stabilized vertical alignment (PSVA) and IPS/FFS, and utilizes a vertical response with a low dark state and a pretilt angle to quickly improve the IPS/FFS.
  • PSVA polymer stabilized vertical alignment
  • IPS/FFS IPS/FFS
  • the contrast ratio, and the display of high transmittance and wide viewing angle, and the polymerization of chemical monomers enhance the interaction between the liquid crystal and the alignment film, help to improve the afterimage problem and improve the reliability of the panel.
  • an embodiment of the present invention provides a method for fabricating a liquid crystal panel, comprising the steps of: providing an array substrate and a color filter substrate, the array substrate comprising a first electrode and a second An electrode, the first electrode has a plurality of trenches; a first photo-alignment film is coated on the array substrate, and a first illumination process is performed on the first photo-alignment film to make the first light
  • the alignment film has a first pretilt angle with respect to the array substrate; coating a second photo alignment film on the color filter substrate, and performing a second illumination treatment on the second photo alignment film to cause the
  • the second photo-alignment film has a second pretilt angle with respect to the color filter substrate; sealing a liquid crystal molecule and a photopolymerizable monomer between the first alignment film and the second alignment film to form a liquid crystal Panel; Performing a third illumination treatment on the liquid crystal panel to perform a polymerization reaction on the photopolymerizable monomer;
  • another embodiment of the present invention provides a method of fabricating a liquid crystal panel, comprising the steps of: providing an array substrate and a color filter substrate, wherein the array substrate comprises a first electrode And a second electrode, the first electrode has a plurality of trenches; coating a first photoalignment film on the array substrate, and performing a first illumination treatment on the first photoalignment film
  • the first photo-alignment film has a first pre-tilt angle with respect to the array substrate; a second photo-alignment film is coated on the color filter substrate, and a second illumination treatment is performed on the second photo-alignment film Having the second photoalignment film have a second pretilt angle with respect to the color filter substrate; sealing a liquid crystal molecule and a photopolymerizable monomer between the first alignment film and the second alignment film, Forming a liquid crystal panel; and performing a third illuminating treatment on the liquid crystal panel to cause a polymerization reaction of
  • the first pretilt angle has an azimuth angle with respect to an extending direction of the trench.
  • the azimuth angle is between 0 and 45 degrees.
  • the first pretilt angle has an azimuth angle with respect to a vertical direction of the trench.
  • the azimuth angle is between 0 and 45 degrees.
  • the first illumination processing is performed by partitioning light, and an upper half and a lower half of the first optical alignment film respectively have the first portion with respect to the array substrate a pretilt angle and a third pretilt angle.
  • the second illuminating process is performed by means of a partition illumination, wherein an upper half and a lower half of the second optical alignment film respectively have a surface with respect to the color filter substrate
  • the second pretilt angle and a fourth pretilt angle are described.
  • the third pretilt angle is anti-parallel with respect to the fourth pretilt angle.
  • the method for manufacturing the liquid crystal panel further includes a step of turning on the first electrode and the second electrode to generate an electric field, so that The long axis of the liquid crystal molecules is rotated parallel to the array substrate and the color filter substrate.
  • the main object of the present invention is to provide a method for manufacturing a liquid crystal panel, which combines the advantages of a polymer stabilized vertical alignment (PSVA) and IPS/FFS, and utilizes a vertical response with a low dark state and a pretilt angle to quickly improve the IPS/FFS.
  • PSVA polymer stabilized vertical alignment
  • IPS/FFS IPS/FFS
  • the contrast ratio, and the display of high transmittance and wide viewing angle, and the polymerization of chemical monomers enhance the interaction between the liquid crystal and the alignment film, help to improve the afterimage problem and improve the reliability of the panel.
  • FIG. 1 is a schematic view showing a method of manufacturing a liquid crystal panel according to an embodiment of the present invention.
  • FIG. 2A to 2B are schematic diagrams showing a first illumination process of the array substrate in a method of fabricating a liquid crystal panel according to an embodiment of the present invention, wherein FIG. 2A uses a positive liquid crystal, and FIG. 2B uses a negative liquid crystal.
  • 3A to 3B are schematic diagrams showing the partitioning illumination of the array substrate in the method of fabricating a liquid crystal panel according to an embodiment of the invention.
  • the manufacturing method of the liquid crystal panel is first: (1) providing an array substrate 10 and a color filter substrate 20.
  • the array substrate 10 includes a first electrode 11 and a second electrode 12.
  • the first electrode 11 may have a plurality of trenches 13, such as an indium tin oxide electrode (ITO) having a plurality of parallel trenches. ).
  • ITO indium tin oxide electrode
  • the manufacturing method of the liquid crystal panel 1 is followed by: (2) coating a first photo alignment film 31 on the array substrate 10, and applying the first light to the first light.
  • the alignment film 31 performs a first illumination process.
  • the first photo-alignment film 31 may face upward, and then the first illumination process may be performed.
  • the first illuminating treatment may be, for example, illuminating the first photo alignment film 31 and the array substrate 10 with ultraviolet light. Therefore, the first photo alignment film 31 can have a first pretilt angle with respect to the array substrate 10.
  • a method for fabricating a liquid crystal panel according to an embodiment of the present invention is followed by: (3) applying a second photo alignment film 32 on the color filter substrate 20, and aligning the second light.
  • the film 32 is subjected to a second illumination process.
  • the second illuminating treatment may, for example, illuminate the second photo alignment film 32 and the color filter substrate 20 with ultraviolet light. Therefore, the second photo alignment film 32 has a second pretilt angle with respect to the color filter substrate 20.
  • the second pretilt angle formed by the second illumination process and the first pretilt angle formed by the first illumination process are in an anti-parallel direction relationship.
  • anti-parallel means that two straight lines (eg, two-side photo-aligned polymers) are parallel to each other, but the directions indicated by the two (eg, the light-aligning polymers on the two sides from the head end to the tail end) Pointing) is in the opposite relationship.
  • the method for fabricating a liquid crystal panel according to an embodiment of the present invention is followed by: (4) sealing a liquid crystal molecule 41 and a photopolymerizable monomer 42 to the first alignment film 31 and the second Between the alignment films 32 to form a liquid crystal panel 1.
  • the liquid crystal molecules 41 may be, for example, a positive liquid crystal or a negative liquid crystal.
  • the photopolymerizable monomer 42 may, for example, be a monomer which can be polymerized by the influence of ultraviolet light.
  • the method for fabricating a liquid crystal panel according to an embodiment of the present invention is followed by: (5) performing a third illumination treatment on the liquid crystal panel 1 to cause a polymerization reaction of the photopolymerizable monomer 42. .
  • the photopolymerizable monomer 42 can be polymerized with the first alignment film 31 and the second alignment film 32, and a concave-convex structure is formed on both surfaces, so that the liquid crystal molecules 41 are
  • the first alignment film 31 has the first pretilt angle
  • the second alignment film 32 has the second pretilt angle. Since the liquid crystal molecules 41 have a first pretilt angle and a second pretilt angle, a fast response effect can be achieved.
  • the liquid crystal molecules 41 are arranged in the first pretilt angle and the second pretilt angle. Out of the vertical alignment.
  • a method of fabricating a liquid crystal panel may include: (6) conducting the first electrode 11 and the second electrode 12 to generate an electric field.
  • the long axis of the liquid crystal molecules 41 can be rotated parallel to the array substrate 10 and the color filter substrate 20 by the influence of the electric field, and thus, the display mode of IPS or FFS can be achieved.
  • steps (2) and (3) may be interchanged with each other.
  • the first pretilt angle has an azimuth angle with respect to an extending direction of the trench 13. ⁇ .
  • the azimuth angle is between 0 and 45 degrees.
  • the first pretilt angle has a vertical direction with respect to a vertical direction of the trench.
  • Azimuth angle ⁇ Preferably, the azimuth angle is between 0 and 45 degrees.
  • FIG. 3A to FIG. 3B shows that when the first electrode 11 has different display domains according to requirements, the array substrate 10 and the first alignment film 31 are first.
  • Schematic diagram of illumination treatment At positions where the first electrode 11 corresponds to a display domain D1 and a display domain D2 adjacent to each other, the trenches 13 generally have two extending directions, for example, Lines 13a and 13b, therefore, may form different electric field directions after the electrodes are turned on to drive the long axis rotation of the liquid crystal molecules to the desired orientation.
  • the first illumination process may use an area illumination to make an upper half of the first optical alignment film 31, that is, a portion corresponding to the display domain D1.
  • the lower half that is, the portion corresponding to the display domain D2
  • has different pretilt angles respectively for example, the upper half forms the first pretilt angle
  • the lower half forms a third pretilt angle.
  • the lower half of the array substrate 31 is shielded, and only the upper half thereof is exposed to ultraviolet light, so that the first pretilt angle can be formed.
  • the upper half of the array substrate 31 is shielded so that only the lower half is exposed to ultraviolet light, so that the third pretilt angle can be formed.
  • the second illumination process in the step (3) may also adopt a partition illumination, such that an upper half and a lower half of the second optical alignment film 32 respectively have the second pretilt angle and a fourth Pretilt angle.
  • the third pretilt angle also exhibits an anti-parallel direction relationship with respect to the fourth pretilt angle.
  • the vertical response has a fast response with a low dark state and a pretilt angle, effectively improving the contrast of the IPS/FFS, and obtaining a display with high transmittance and wide viewing angle, while utilizing polymerization of chemical monomers to enhance the liquid crystal.
  • the interaction with the alignment film helps to improve the afterimage problem and enhance the reliability of the panel.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Geometry (AREA)
  • Liquid Crystal (AREA)

Abstract

一种液晶面板的制造方法，其包含步骤：提供一阵列基板（10）和一彩膜基板（20），所述阵列基板（10）包含一第一电极（11）以及一第二电极（12），所述第一电极具有多个沟槽（13）；涂布一第一光配向膜（31）在所述阵列基板（10）上，并对所述第一光配向膜（31）进行一第一照光处理，使所述第一光配向膜（31）具有一第一预倾角；涂布一第二光配向膜（32）在所述彩膜基板（20）上，并对所述第二光配向膜（32）进行一第二照光处理，使所述第二光配向膜（32）具有一第二预倾角，其中所述第二预倾角相对于所述第一预倾角呈反平行；密封一液晶分子（41）和一光聚合单体（42）于所述第一配向膜（31）和所述第二配向膜（32）之间，以形成一液晶面板；以及对所述液晶面板进行一第三照光处理，使所述光聚合单体（42）进行一聚合反应。

Description

液晶面板的制造方法 技术领域
本发明是有关于一种液晶面板的制造方法，特别是有关于一种具有广视角的面内横向电场开关（In-Plane Switch，IPS）液晶面板或边缘电厂开关（Fringe Field Switching，FFS）液晶面板的制造方法。
 背景技术
在现今的各种显示技术中，液晶显示作为一种成熟的技术被广泛接受。液晶显示器（LCD）利用了液晶的电光效应，通过电路控制液晶分子的透射率及反射率，调控背光模块发出的光透过色阻的强度，来实现不同灰阶和不同色彩的图像显示。
传统的垂直配向（VA）显示技术具有高对比、高穿透率且快速响应的优势，但其视角较差，需要设计多个显示畴（domain）来解决画面洗白（color wash out）的问题。而传统的IPS/FFS类型的显示技术则具有广视角的特性，但相比于垂直配向的显示模式来说，其对比度较差。
故，有必要提供一种液晶面板的制造方法，结合上述两种显示模式的优点，以解决现有技术所存在的问题。
 技术问题
本发明的主要目的在于提供一种液晶面板的制造方法，结合高分子稳定垂直配向（PSVA）与IPS/FFS的优点，利用垂直配向具有低暗态和预倾角的快速响应，有效改善IPS/FFS的对比度，并可获得高穿透率和广视角的显示画面，同时利用化学单体的聚合，增强液晶与配向膜之间的相互作用，有助于改善残像问题，提升面板的信赖性。
 技术解决方案
为达成本发明的前述目的，本发明一实施例提供一种液晶面板的制造方法，其包含下列步骤：提供一阵列基板和一彩膜基板，所述阵列基板包含一第一电极以及一第二电极，所述第一电极具有多个沟槽；涂布一第一光配向膜在所述阵列基板上，并对所述第一光配向膜进行一第一照光处理，使所述第一光配向膜相对于所述阵列基板具有一第一预倾角；涂布一第二光配向膜在所述彩膜基板上，并对所述第二光配向膜进行一第二照光处理，使所述第二光配向膜相对于所述彩膜基板具有一第二预倾角；密封一液晶分子和一光聚合单体于所述第一配向膜和所述第二配向膜之间，以形成一液晶面板；以及 对所述液晶面板进行一第三照光处理，使所述光聚合单体进行一聚合反应；其中所述沟槽包含一第一延伸方向及一第二延伸方向，所述第一延伸方向和所述第二延伸方向分别对应一第一显示畴和一第二显示畴，所述第二预倾角相对于所述第一预倾角呈反平行；以及其中当所述液晶分子为一正型液晶时，所述第一预倾角相对于所述沟槽的一延伸方向具有一方位角；当所述液晶分子为一负型液晶时，所述第一预倾角相对于所述沟槽的一垂直方向具有一方位角。
再者，为达成本发明的前述目的，本发明另一实施例提供一种液晶面板的制造方法，其包含下列步骤：提供一阵列基板和一彩膜基板，所述阵列基板包含一第一电极以及一第二电极，所述第一电极具有多个沟槽；涂布一第一光配向膜在所述阵列基板上，并对所述第一光配向膜进行一第一照光处理，使所述第一光配向膜相对于所述阵列基板具有一第一预倾角；涂布一第二光配向膜在所述彩膜基板上，并对所述第二光配向膜进行一第二照光处理，使所述第二光配向膜相对于所述彩膜基板具有一第二预倾角；密封一液晶分子和一光聚合单体于所述第一配向膜和所述第二配向膜之间，以形成一液晶面板；以及对所述液晶面板进行一第三照光处理，使所述光聚合单体进行一聚合反应，其中所述第二预倾角相对于所述第一预倾角呈反平行。
在本发明的一实施例中，当所述液晶分子为一正型液晶时，所述第一预倾角相对于所述沟槽的一延伸方向具有一方位角。
在本发明的一实施例中，所述方位角介于0至45度。
在本发明的一实施例中，当所述液晶分子为一负型液晶时，所述第一预倾角相对于所述沟槽的一垂直方向具有一方位角。
在本发明的一实施例中，所述方位角介于0至45度。
在本发明的一实施例中，所述第一照光处理是以分区照光的方式，使所述第一光配向膜的一上半部及一下半部相对于所述阵列基板分别具有所述第一预倾角及一第三预倾角。
在本发明的一实施例中，所述第二照光处理是以分区照光的方式进行，使所述第二光配向膜的一上半部及一下半部相对于所述彩膜基板分别具有所述第二预倾角及一第四预倾角。
在本发明的一实施例中，所述第三预倾角相对于所述第四预倾角呈反平行。
在本发明的一实施例中，在所述第三照光处理后，所述液晶面板的制造方法另包含一步骤：导通所述第一电极和所述第二电极，以产生一电场，使所述液晶分子的长轴旋转至平行于所述阵列基板和所述彩膜基板。
 有益效果
本发明的主要目的在于提供一种液晶面板的制造方法，结合高分子稳定垂直配向（PSVA）与IPS/FFS的优点，利用垂直配向具有低暗态和预倾角的快速响应，有效改善IPS/FFS的对比度，并可获得高穿透率和广视角的显示画面，同时利用化学单体的聚合，增强液晶与配向膜之间的相互作用，有助于改善残像问题，提升面板的信赖性。
附图说明
图1是本发明一实施例的液晶面板的制造方法的示意图。
图2A至2B是本发明一实施例的液晶面板的制造方法中，所述阵列基板进行第一照光处理的示意图，其中图2A是使用正型液晶，图2B是使用负型液晶。
图3A至3B是本发明一实施例的液晶面板的制造方法中，所述阵列基板进行分区照光的示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。再者，本发明所提到的方向用语，例如上、下、顶、底、前、后、左、右、内、外、侧面、周围、中央、水平、横向、垂直、纵向、轴向、径向、最上层或最下层等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
请参照图1A至1F所示，其揭示本发明一实施例的液晶面板的制造方法。如图1所示，所述液晶面板的制造方法首先是：（1）提供一阵列基板10和一彩膜基板20。所述阵列基板10上包含了一第一电极11以及一第二电极12，所述第一电极11可以具有多个沟槽13，例如是具有多条平行沟槽的的氧化铟锡电极（ITO）。
请继续参照图1B所示，本发明一实施例的液晶面板1的制造方法接着是：（2）涂布一第一光配向膜31在所述阵列基板10上，并对所述第一光配向膜31进行一第一照光处理。优选的，可将所述第一光配向膜31朝上，再进行所述第一照光处理。所述第一照光处理可例如是使用紫外光照射所述第一光配向膜31和所述阵列基板10。因此，所述第一光配向膜31可相对于所述阵列基板10具有一第一预倾角。
请参照图1C所示，本发明一实施例的液晶面板的制造方法接着是：（3）涂布一第二光配向膜32在所述彩膜基板20上，并对所述第二光配向膜32进行一第二照光处理。所述第二照光处理可例如是使用紫外光照射所述第二光配向膜32和所述彩膜基板20。因此，所述第二光配向膜32相对于所述彩膜基板20具有一第二预倾角。优选的，所述第二照光处理所形成的所述第二预倾角与所述第一照光处理所形成的所述第一预倾角是呈现一个反平行的方向关系。本发明此处及下文所指的“反平行”是指二条直线(如二侧的光配向高分子)彼此平行，但两者所指方向(如二侧的光配向高分子由头端至尾端的指向)呈相反关系。
请继续参照图1D所示，本发明一实施例的液晶面板的制造方法接着是：（4）密封一液晶分子41和一光聚合单体42于所述第一配向膜31和所述第二配向膜32之间，以形成一液晶面板1。所述液晶分子41可例如是一正型液晶或一负型液晶。所述光聚合单体42可例如是可受紫外光影响而进行聚合反应的单体。
请继续参照图1E所示，本发明一实施例的液晶面板的制造方法接着是：（5）对所述液晶面板1进行一第三照光处理，使所述光聚合单体42进行一聚合反应。在本步骤中，所述光聚合单体42可与所述第一配向膜31及所述第二配向膜32聚合，而在两者表面皆形成凹凸状的结构，使所述液晶分子41在所述第一配向膜31具有所述第一预倾角，在所述第二配向膜32具有所述第二预倾角。由于所述液晶分子41具有第一预倾角及第二预倾角，可达成快速响应的效果。此外，在本步驟中，所述液晶分子41以所述第一預傾角及所述第二預傾角排列而呈
Figure 73fe
出接近垂直的配向。
请继续参照图1F所示，本发明一实施例的液晶面板的制造方法可包含：（6）导通所述第一电极11和所述第二电极12，以产生一电场。所述液晶分子41的长轴可藉由所述电场的影响而旋转至平行于所述阵列基板10和所述彩膜基板20，如此，可达成IPS或FFS的显示模式。
上述液晶面板的制造方法中，步骤（2）及（3）的顺序可以彼此互换。
请参照图2A所示，在本发明的一实施例中，当所述液晶分子41为一正型液晶时，所述第一预倾角相对于所述沟槽13的一延伸方向具有一方位角θ。优选的，所述方位角介于0至45度。
或者，请参照图2B所示，在本发明的另一实施例中，当所述液晶分子41为一负型液晶时，所述第一预倾角相对于所述沟槽的一垂直方向具有一方位角θ。优选的，所述方位角介于0至45度。
再者，请参照图3A至3B所示，其显示了当所述第一电极11依照需求而具有不同的显示畴的设计时，所述阵列基板10及所述第一配向膜31进行第一照光处理的示意图。在所述第一电极11所对应的彼此相邻的一显示畴D1和一显示畴D2的位置处，所述沟槽13通常分别具有两个延伸方向，例如
Figure 865b
線13a及13b，因此在电极导通之后可以形成不同电场方向，以驱动液晶分子长轴旋转至所需要的方位。在本发明的液晶面板的制造方法中，所述第一照光处理可利用分区照光的方式，使所述第一光配向膜31的一上半部，即对应所述显示畴D1的部份，以及一下半部，即对应所述显示畴D2的部份，分别具有不同的预倾角，例如上半部是形成所述第一预倾角，而下半部是形成一第三预倾角。
如图3A所示，当分区照光时，遮蔽所述阵列基板31的下半部，仅露出其上半部受到紫外光照射，因此可形成所述第一预倾角。接着，如图3B所示，遮蔽所述阵列基板31的上半部仅露出下半部受紫外光照射，因此可形成所述第三预倾角。
相似的，步骤（3）中所述第二照光处理也可以采用分区照光，使所述第二光配向膜32的一上半部及一下半部分别具有所述第二预倾角及一第四预倾角。优选的，所述第三预倾角相对于所述第四预倾角也呈现反平行的方向关系。
如上所述，利用垂直配向具有低暗态和预倾角的快速响应，有效改善IPS/FFS的对比度，并可获得高穿透率和广视角的显示画面，同时利用化学单体的聚合，增强液晶与配向膜之间的相互作用，有助于改善残像问题，提升面板的信赖性。
本发明已由上述相关实施例加以描述，然而上述实施例仅为实施本发明的范例。必需指出的是，已公开的实施例并未限制本发明的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围内。

Claims (15)

  1. 一种液晶面板的制造方法，其包含下列步骤：
    提供一阵列基板和一彩膜基板，所述阵列基板包含一第一电极以及一第二电极，所述第一电极具有多个沟槽；
    涂布一第一光配向膜在所述阵列基板上，并对所述第一光配向膜进行一第一照光处理，使所述第一光配向膜相对于所述阵列基板具有一第一预倾角；
    涂布一第二光配向膜在所述彩膜基板上，并对所述第二光配向膜进行一第二照光处理，使所述第二光配向膜相对于所述彩膜基板具有一第二预倾角；
    密封一液晶分子和一光聚合单体于所述第一配向膜和所述第二配向膜之间，以形成一液晶面板；以及
    对所述液晶面板进行一第三照光处理，使所述光聚合单体进行一聚合反应；
    其中所述沟槽包含一第一延伸方向及一第二延伸方向，所述第一延伸方向和所述第二延伸方向分别对应一第一显示畴和一第二显示畴，所述第二预倾角相对于所述第一预倾角呈反平行；以及
    其中当所述液晶分子为一正型液晶时，所述第一预倾角相对于所述沟槽的一延伸方向具有一方位角；当所述液晶分子为一负型液晶时，所述第一预倾角相对于所述沟槽的一垂直方向具有一方位角。
  2. 如权利要求1所述的液晶面板的制造方法，其中当所述液晶分子为正型或负型液晶时，所述方位角介于0至45度。
  3. 如权利要求1所述的液晶面板的制造方法，其中所述第一照光处理是以分区照光的方式进行，使所述第一光配向膜在对应所述第一显示畴及所述第二显示畴的范围内分别具有所述第一预倾角及一第三预倾角。
  4. 如权利要求3所述的液晶面板的制造方法，其中所述第二照光处理是以分区照光的方式进行，使所述第二光配向膜在对应所述第一显示畴及所述第二显示畴的范围内分别具有所述第二预倾角及一第四预倾角。
  5. 如权利要求4所述的液晶面板的制造方法，其中所述第三预倾角相对于所述第四预倾角呈反平行。
  6. 如权利要求1所述的液晶面板的制造方法，其中在第三照光处理后，所述液晶面板的制造方法另包含一步骤：导通所述第一电极和所述第二电极，以产生一电场，使所述液晶分子的一长轴旋转至平行于所述阵列基板和所述彩膜基板。
  7. 一种液晶面板的制造方法，其包含下列步骤：
    提供一阵列基板和一彩膜基板，所述阵列基板包含一第一电极以及一第二电极，所述第一电极具有多个沟槽；
    涂布一第一光配向膜在所述阵列基板上，并对所述第一光配向膜进行一第一照光处理，使所述第一光配向膜相对于所述阵列基板具有一第一预倾角；
    涂布一第二光配向膜在所述彩膜基板上，并对所述第二光配向膜进行一第二照光处理，使所述第二光配向膜相对于所述彩膜基板具有一第二预倾角；
    密封一液晶分子和一光聚合单体于所述第一配向膜和所述第二配向膜之间，以形成一液晶面板；以及
    对所述液晶面板进行一第三照光处理，使所述光聚合单体进行一聚合反应，
    其中所述第二预倾角相对于所述第一预倾角呈反平行。
  8. 如权利要求7所述的液晶面板的制造方法，其中当所述液晶分子为一正型液晶时，所述第一预倾角相对于所述沟槽的一延伸方向具有一方位角。
  9. 如权利要求8所述的液晶面板的制造方法，其中所述方位角介于0至45度。
  10. 如权利要求7所述的液晶面板的制造方法，其中当所述液晶分子为一负型液晶时，所述第一预倾角相对于所述沟槽的一垂直方向具有一方位角。
  11. 如权利要求10所述的液晶面板的制造方法，其中所述方位角介于0至45度。
  12. 如权利要求7所述的液晶面板的制造方法，其中所述第一照光处理是以分区照光的方式进行，使所述第一光配向膜的一上半部及一下半部相对于所述阵列基板分别具有所述第一预倾角及一第三预倾角。
  13. 如权利要求12所述的液晶面板的制造方法，其中所述第二照光处理是以分区照光的方式进行，使所述第二光配向膜的一上半部及一下半部相对于所述彩膜基板分别具有所述第二预倾角及一第四预倾角。
  14. 如权利要求13所述的液晶面板的制造方法，其中所述第三预倾角相对于所述第四预倾角呈反平行。
  15. 如权利要求7所述的液晶面板的制造方法，其中在第三照光处理后，所述液晶面板的制造方法另包含一步骤：导通所述第一电极和所述第二电极，以产生一电场，使所述液晶分子的一长轴旋转至平行于所述阵列基板和所述彩膜基板。
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