WO2016145681A1 - 液晶显示面板 - Google Patents

液晶显示面板 Download PDF

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Publication number
WO2016145681A1
WO2016145681A1 PCT/CN2015/075656 CN2015075656W WO2016145681A1 WO 2016145681 A1 WO2016145681 A1 WO 2016145681A1 CN 2015075656 W CN2015075656 W CN 2015075656W WO 2016145681 A1 WO2016145681 A1 WO 2016145681A1
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Prior art keywords
electrode
disposed
substrate
pixel electrode
common electrode
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PCT/CN2015/075656
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English (en)
French (fr)
Inventor
唐岳军
Original Assignee
深圳市华星光电技术有限公司
武汉华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司, 武汉华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US14/778,290 priority Critical patent/US10031373B2/en
Publication of WO2016145681A1 publication Critical patent/WO2016145681A1/zh

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    • 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
    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
    • 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
    • G02F1/133345—Insulating 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
    • G02F1/1343—Electrodes
    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13398—Spacer materials; Spacer properties
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/121—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode common or background
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/16—Materials and properties conductive

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a liquid crystal display panel in which liquid crystal molecules are rotated in a plane parallel to a substrate to control luminous flux.
  • liquid crystal displays Compared with traditional displays, liquid crystal displays have the advantages of lightness, thinness, low power consumption, low radiation, etc., and are therefore widely used in various fields such as computers, mobile phones, and automobile displays. With the wide application of liquid crystal displays, the performance requirements of liquid crystal displays are getting higher and higher.
  • FFS (fringe-field switching) liquid crystal display panel and IPS (In-Plane Switching) mode liquid crystal display panel are widely used in daily necessities and production supplies. Since the liquid crystal molecules are twisted in a plane parallel to the display panel to control the luminous flux, the IPS and FFS liquid crystal display panels have the advantages of large viewing angle and true color. However, when the finger slides and presses the FFS or IPS liquid crystal display panel, the disclination line in the panel expands as the finger slides. As the finger slides, the liquid crystal molecules lying flat will stand up or confuse. If the liquid crystal molecules cannot be restored to the flat state or the previous orientation state, the Trace mura phenomenon occurs. In the liquid crystal display panel, the presence of Trace mura greatly affects the display quality of the liquid crystal display panel.
  • the present invention provides a liquid crystal display panel for improving the phenomenon of poor finger pressure of a liquid crystal display panel.
  • a liquid crystal display panel including:
  • a second substrate located at a position opposite to the first substrate, and a pixel electrode and a common electrode are disposed on the second substrate;
  • the auxiliary spacer is provided with a top electrode, and an extension electrode of the common electrode and an extension electrode of the pixel electrode are disposed at a position corresponding to the top electrode on the second substrate, so that the panel is subjected to Extrusion causes the distance between the first substrate and the second substrate to become small, the top electrode being in contact with the extension electrode of the common electrode and the extension electrode of the pixel electrode to conduct the common An electrode and the pixel electrode.
  • the auxiliary spacer is disposed on each pixel of the first substrate.
  • the top electrode is arranged in a block structure and is fixed to the top of the auxiliary spacer.
  • the top surface of the extended electrode of the common electrode is on the same plane as the top surface of the extended electrode of the pixel electrode.
  • the extension electrode of the common electrode and the extension electrode of the pixel electrode are comb electrodes, wherein the extension electrode of the common electrode and the extension electrode of the pixel electrode form an interdigitation type relationship.
  • the panel further includes a main spacer disposed between the first substrate and the second substrate and fixed to the first substrate Above, the height of the primary spacer is greater than the sum of the height of the auxiliary spacer and the height of the top electrode.
  • the top electrode is a conductive film.
  • the top electrode is a conductive metal.
  • the pixel electrode is disposed on an upper portion of the common electrode, and an insulating layer is disposed between the pixel electrode and the common electrode.
  • the common electrode is disposed on an upper portion of the pixel electrode, and an insulating layer is disposed between the pixel electrode and the common electrode.
  • the invention provides a top electrode on the auxiliary spacer so that when the liquid crystal display panel is pressed, the pixel electrode and the common electrode are turned on by the top electrode to eliminate the voltage difference between the pixel electrode and the common electrode, so that the liquid crystal molecules are in the absence Under the action of the electric field force, the flat state is restored or the orientation state before the pressing is quickly restored, thereby improving the phenomenon of poor finger pressure of the liquid crystal display panel.
  • FIG. 1 is a schematic structural view of an auxiliary spacer and a main spacer on a first substrate according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a pixel electrode and a corresponding extension electrode, a common electrode, and a corresponding extension electrode on a second substrate according to an embodiment of the invention
  • FIG. 3 is an enlarged schematic view showing an extension electrode of the common electrode and an extension electrode of the pixel electrode in FIG. 2;
  • FIG. 4 is a schematic illustration of the operation of a top electrode on an auxiliary spacer in accordance with an embodiment of the present invention.
  • IPS and FFS are display technologies for rotating liquid crystal molecules in a plane parallel to the substrate to realize brightness control of the liquid crystal panel. Among them, an electric field that causes liquid crystal molecules to rotate is generated by a pixel electrode and a common electrode provided on the same substrate.
  • the pixel electrode and the common electrode generate a horizontal electric field in a space for arranging liquid crystal molecules between the two substrates, and the liquid crystal molecules rotate in a plane parallel to the substrate under the action of the horizontal electric field.
  • the horizontal electric field generated by the two electrodes is controlled by controlling the voltage between the pixel electrode and the common electrode, the rotation angle of the liquid crystal molecules is controlled by controlling the magnitude of the horizontal electric field, and the luminous flux transmitted through the liquid crystal panel is controlled by the rotation angle of the liquid crystal molecules.
  • An IPS, FFS mode liquid crystal panel fabricated using a positive liquid crystal in which a long axis of liquid crystal molecules is parallel to a liquid crystal panel. When a horizontal electric field is applied, the long axis of the liquid crystal molecules is parallel to the electric field lines.
  • the liquid crystal molecules in the panel stand up or are disordered (in all directions), and the area where the arrangement is disordered is enlarged, that is, the disclination line area is enlarged.
  • the pixel electrode and the common electrode are mainly used to form a horizontal electric field, the direction of the electric field at the corner of the pixel electrode and the corner of the common electrode is complicated, and the electric field here includes a horizontal component and a vertical component.
  • the vertical component causes the liquid crystal molecules to generate a large pretilt angle. After the sliding press is stopped, the liquid crystal molecules cannot recover the flat state or the previous orientation state extremely quickly due to the existence of the vertical component.
  • the liquid crystal molecules due to the interaction of the horizontal electric field and the vertical electric field, the liquid crystal molecules here are complicated to turn and difficult to control, thereby affecting the display quality of the liquid crystal display panel.
  • methods for improving the phenomenon of finger pressure failure of a liquid crystal display panel have the steps of reducing the driving voltage of liquid crystal molecules and optimizing pixels.
  • Design select a liquid crystal with fast response and black drive.
  • the driving voltage of the liquid crystal molecules is lowered to improve the phenomenon of poor finger pressure, since the voltage required to drive the liquid crystal molecules is lowered, the time for the liquid crystal molecules to rotate to a desired angle is increased.
  • optimizing liquid crystal molecules with fast response speed to improve the phenomenon of poor finger pressure is limited.
  • the black insertion driver is used to improve the phenomenon of poor finger pressure, it is necessary to cooperate with the software and hardware on the liquid crystal panel to operate the entire screen.
  • the present invention provides a liquid crystal display panel which is simple, convenient, and timely to restore standing or disordered liquid crystal molecules to a flat state.
  • the liquid crystal display panel includes a first substrate, a second substrate, an auxiliary spacer, a pixel electrode, and a common electrode.
  • the second substrate is located opposite to the first substrate, and the pixel electrode and the common electrode are disposed on the second substrate.
  • the auxiliary spacer is located between the first substrate and the second substrate and is fixed on the first substrate.
  • the auxiliary spacer is provided with a top electrode, and the extension electrode of the common electrode and the extension electrode of the pixel electrode are disposed on the second substrate corresponding to the position of the top electrode.
  • the top electrode is configured as a block structure and is secured to the top of the auxiliary spacer.
  • a black matrix layer 12 and a color layer 13 are provided on a glass substrate 11, and an auxiliary spacer 141 is provided on the black matrix layer 12.
  • the glass substrate 11, the black matrix layer 12, and the color layer 13 constitute a first substrate.
  • a bulk electrode A (top electrode) is fixed on the top of the auxiliary spacer 141, and the bulk electrode A has a conductive function.
  • the top electrode is not limited to a bulk structure, and other shapes or structures of conductive electrodes can be used as the top electrode herein.
  • the auxiliary spacers 141 are disposed on the black matrix layer 12 of the first substrate, thereby avoiding the light-transmissive color layer 13 and facilitating the improvement of the aperture ratio of the liquid crystal display panel.
  • the auxiliary spacer 141 can also be disposed at other locations of the pixel.
  • the bulk electrode may be selected from a conductive film.
  • the conductive film may be selected from an ITO (Indium Tin Oxide, tin-doped indium oxide) film.
  • the bulk electrode may be selected from a conductive metal, and the conductive metal may be selected from a conductive metal such as AL or Mo.
  • the bulk electrode is not limited to the conductive film or the conductive metal described above.
  • a common electrode 22 is disposed on the substrate 27, and an insulating layer 26 is disposed between the pixel electrode 21 and the common electrode 22.
  • the substrate 27, the common electrode 22, the insulating layer 26, and the pixel electrode 21 constitute a second Substrate 2.
  • the common electrode 22 and the pixel electrode 21 both lead to the extension electrode for contact with the top electrode.
  • the top surface of the extension electrode 221 of the common electrode and the top surface of the extension electrode 211 of the pixel electrode Set to be on the same plane. Since the insulating layer 26 is disposed between the pixel electrode 21 and the common electrode 22, the insulating layer of the common electrode and the insulating layer of the extended electrode region of the pixel electrode are etched away.
  • each pixel on the liquid crystal panel is An auxiliary spacer having a top electrode is provided. In this way, control of the liquid crystal molecules in each pixel can be achieved.
  • the extended electrode of the common electrode and the extended electrode of the pixel electrode are both dense comb electrodes, wherein the extended electrode of the common electrode and the extended electrode of the pixel electrode form an interdigitated relationship.
  • a comb-shaped pixel electrode 21 and a planar common electrode 22 are provided on the second substrate, and an insulating layer (not shown in FIG. 2) is provided between the pixel electrode 21 and the common electrode 22.
  • a gate line 23, a data line 24, and a TFT (Thin Film Transistor) switch 25 are further disposed on the second substrate.
  • the comb-like electrode region A' is taken up corresponding to the position of the bulk electrode A.
  • Fig. 3 is an enlarged schematic view showing the comb-like extended electrode region A' of Fig. 2.
  • the comb-shaped extension electrode 221 of the common electrode 22 and the comb-shaped extension electrode 211 of the pixel electrode 21 form an interdigitated relationship, and a certain distance gap between the comb teeth prevents the two from contacting and both. Inter-electric field interference.
  • a horizontal electric field is generated between the extended electrode of the common electrode 22 and the extended electrode of the pixel electrode 21 to avoid generation of a disordered electric field that affects the rotation of the liquid crystal molecules in other directions.
  • the extension electrode 221 of the common electrode and the extension electrode 211 of the pixel electrode are not limited to the above comb-shaped interdigitated structure.
  • the surface of the top electrode A, the surface of the extension electrode 221 of the common electrode, and the surface of the extension electrode 211 of the pixel electrode have no orientation material.
  • the alignment material is used to form an alignment layer for orienting liquid crystal molecules.
  • the orientation material has affinity with the liquid crystal molecules. In order to prevent the influence of the alignment material on the liquid crystal steering and affect the electrical conductivity between the bulk electrode A and the extension electrode, the orientation surface of the bulk electrode A and the extension electrode needs to be removed.
  • a primary spacer 142 is also disposed between the first substrate and the second substrate of the display panel.
  • the main spacer 142 is fixed on the first substrate to ensure the thickness and thickness uniformity of the liquid crystal cell, that is, to ensure the gap between the first substrate and the second substrate is unchanged, as shown in FIG.
  • the primary spacer 142 is disposed on the first lining On the black matrix layer 12 on each pixel of the bottom, the color layer 13 occupies the light transmission is avoided, which is advantageous for increasing the aperture ratio of the liquid crystal display panel.
  • the primary spacer 142 can also be placed at other locations of the pixel.
  • the height of the main spacer 142 needs to be greater than the sum of the height of the auxiliary spacer 141 and the height of the top electrode A, so that the liquid crystal panel is not pressed due to the presence of the main spacer 142, the top electrode A and the extension electrode Can not touch, to ensure that the LCD panel works properly.
  • the main spacer 142 is compressed, the distance between the first substrate and the second substrate becomes small, and the bulk electrode A conducts the common electrode 22 and the pixel electrode 21.
  • the liquid crystal molecules standing or disordered by the finger pressing are anchored.
  • the bulk electrode A and the extended electrode 221 of the common electrode and the extended electrode 211 of the pixel electrode are turned into a non-contact state, and the pixel can be normally supplied with a signal.
  • the screen is displayed such that the liquid crystal molecules return to the orientation state before pressing.
  • FIG. 4 is a schematic diagram showing the function of using the top electrode A and the extension electrode to turn on the pixel electrode 211 and the common electrode 221 according to an embodiment of the present invention.
  • the bulk electrode A on the auxiliary spacer 141 on the first substrate 1 is in contact with the extension electrode 221 of the common electrode and the extension electrode 211 of the pixel electrode, thereby making the pixel
  • the electrode 21 and the common electrode 22 are turned on to eliminate the voltage difference between the two.
  • the pixel electrode and the common electrode are formed on the same substrate, and the pixel electrode and the common electrode are arranged one above another. Therefore, the arrangement of the pixel electrode and the common electrode is divided into two types.
  • the pixel electrode is disposed on the top of the second substrate, the common electrode is disposed on the bottom of the second substrate, and an insulating layer is disposed between the pixel electrode and the common electrode for electrical isolation. 4 is shown.
  • the common electrode is disposed on the top of the second substrate, the pixel electrode is disposed on the bottom of the second substrate, and an insulating layer is disposed between the pixel electrode and the common electrode for electrical isolation.
  • the liquid crystal panels of the two structures can adopt a method of disposing a top electrode on the auxiliary spacer, so that the liquid crystal molecules standing or disordered after the liquid crystal panel is pressed are restored to the flat state.

Abstract

一种液晶显示面板，包括：第一衬底（1）；第二衬底（2），其位于与第一衬底（1）相对的位置上，并且在第二衬底（2）上设置有像素电极（21）和公共电极（22）；辅助隔垫物（141），其位于第一衬底（1）和第二衬底（2）之间并固定于第一衬底（1）上，其中，辅助隔垫物（141）设置有顶部电极（A），第二衬底（2）上对应顶部电极（A）的位置处设置有公共电极的延伸电极（221）和像素电极的延伸电极（211），以使得面板受到挤压后，顶部电极（A）与公共电极的延伸电极（221）和像素电极的延伸电极（211）接触来导通公共电极（22）和像素电极（21）。

Description

液晶显示面板
相关技术的交叉引用
本申请要求享有2015年03月17日提交的名称为：“液晶显示面板”的中国专利申请CN201510118156.4的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示技术领域，具体地说，尤其涉及一种液晶分子在平行于基板的平面内转动来控制光通量的液晶显示面板。
背景技术
相比传统的显示器，液晶显示器具有轻、薄、低功耗、低辐射等优点，因此被广泛应用于计算机、移动电话、汽车显示屏等多种领域。随着液晶显示器的广泛应用，人们对液晶显示器的性能要求越来越高。
FFS(fringe-field switching，边缘场开关)液晶显示面板、IPS(In-Plane Switching，面内转换)模式液晶显示面板广泛应用于日常生活用品和生产用品中。由于液晶分子是在平行于显示面板的平面内扭曲来控制光通量，因此，IPS、FFS液晶显示面板具有可视角度大、色彩真实的优点。但是，当手指滑动按压FFS、IPS液晶显示面板时，面板中的disclination line(向错线)会随着手指滑动扩大。随着手指的滑动，平躺的液晶分子也会站立起来或者排列混乱。如果不能让液晶分子极快地恢复平躺状态或者按压之前的取向状态，就产生了Trace mura(指压不良)现象。在液晶显示面板中，Trace mura的存在极大地影响了液晶显示面板的显示品质。
如何改善液晶显示面板的指压不良现象，并提升液晶显示面板的显示性能为业界持续研究的方向。
发明内容
为解决上述问题，本发明提供了一种液晶显示面板，用以改善液晶显示面板的指压不良现象。
根据本发明的一个实施例，提供了一种液晶显示面板，包括：
第一衬底；
第二衬底，其位于与所述第一衬底相对的位置上，并且在所述第二衬底上设置有像素电极和公共电极；
辅助隔垫物，其位于所述第一衬底和所述第二衬底之间并固定于所述第一衬底上，
其中，所述辅助隔垫物设置有顶部电极，所述第二衬底上对应所述顶部电极的位置处设置有所述公共电极的延伸电极和所述像素电极的延伸电极，以使得面板受到挤压导致所述第一衬底和所述第二衬底之间的距离变小时，所述顶部电极与所述公共电极的延伸电极和所述像素电极的延伸电极接触来导通所述公共电极和所述像素电极。
根据本发明的一个实施例，在所述第一衬底的每个像素上均设置有所述辅助隔垫物。
根据本发明的一个实施例，所述顶部电极设置为块状结构并且固定于所述辅助隔垫物的顶部。
根据本发明的一个实施例，所述公共电极的延伸电极的顶面与所述像素电极的延伸电极的顶面位于同一平面上。
根据本发明的一个实施例，所述公共电极的延伸电极和所述像素电极的延伸电极均为梳状电极，其中，所述公共电极的延伸电极和所述像素电极的延伸电极形成交指型关系。
根据本发明的一个实施例，所述面板还包括主要隔垫物，所述主要隔垫物设置于所述第一衬底和所述第二衬底之间并且固定于所述第一衬底上，所述主要隔垫物的高度大于所述辅助隔垫物的高度与所述顶部电极的高度之和。
根据本发明的一个实施例，所述顶部电极为导电薄膜。
根据本发明的一个实施例，所述顶部电极为导电金属。
根据本发明的一个实施例，所述像素电极设置于所述公共电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
根据本发明的一个实施例，所述公共电极设置于所述像素电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
本发明的有益效果：
本发明在辅助隔垫物上设置顶部电极，使得在液晶显示面板受到挤压时，通过顶部电极导通像素电极和公共电极来消除像素电极和公共电极之间的电压差，使得液晶分子在无电场力作用下极快地恢复平躺状态或者按压之前的取向状态，从而改善液晶显示面板的指压不良现象。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要 求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例共同用于解释本发明，并不构成对本发明的限制。在附图中：
图1是根据本发明的一个实施例的第一衬底上的辅助隔垫物和主要隔垫物的结构示意图；
图2是根据本发明的一个实施例的第二衬底上的像素电极及对应的延伸电极、公共电极及对应的延伸电极的结构示意图；
图3是图2中的公共电极的延伸电极和像素电极的延伸电极的放大示意图；以及
图4是根据本发明的一个实施例的辅助隔垫物上的顶部电极的工作原理示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，以下结合附图对本发明作进一步地详细说明。
IPS、FFS是使液晶分子在平行于基板的平面内转动、实现液晶面板亮度控制的显示技术。其中，使液晶分子发生转动的电场由设置于同一基板上的像素电极和公共电极产生。
像素电极和公共电极在两个基板之间用于设置液晶分子的空间内产生水平电场，液晶分子在该水平电场的作用下在平行于基板的平面内转动。通过控制像素电极和公共电极之间的电压来控制两者产生的水平电场大小，通过控制水平电场的大小来控制液晶分子的转动角度，通过液晶分子转动角度的大小来控制透过液晶面板的光通量。
采用正性液晶制作的IPS、FFS模式液晶面板，其中的液晶分子长轴平行于液晶面板。在外加水平电场时，液晶分子长轴与电场线平行。
当用手指滑动按压采用正性液晶制作的IPS、FFS液晶显示面板时，面板中液晶分子会站立起来或排列混乱(各个方向)，并使排列混乱的区域扩大，即disclination line区域扩大。虽然像素电极和公共电极主要用于形成水平电场，但是在像素电极的拐角处和公共电极的拐角处的电场方向复杂，此处的电场包括水平分量和竖直分量。其中，竖直分量会让液晶分子产生大的预倾角。在停止滑动按压后，由于竖直分量的存在，液晶分子不能极快地恢复平躺状态或者按压之前的取向状态。同时，由于该处水平电场和竖直电场共同作用，使得此处的液晶分子转向复杂而难以控制，从而影响液晶显示面板的显示品质。
目前，改善液晶显示面板指压不良现象的方法有降低液晶分子的驱动电压、优化像素 设计、选择响应速度快的液晶和插黑驱动等。其中，采用降低液晶分子的驱动电压来改善指压不良现象时，由于降低了驱动液晶分子所需的电压，会增大液晶分子转动到所需角度的时间。采用优化像素设计改善指压不良现象时，需要结合降低驱动电压才能实现。选择响应速度快的液晶分子来改善指压不良现象的程度有限。采用插黑驱动改善指压不良现象时，需要液晶面板上的软硬件配合来对整个画面进行操作才能实现。
因此，本发明提供了一种简单、方便、及时地让站立或排列混乱的液晶分子恢复平躺状态的液晶显示面板。
该液晶显示面板包括第一衬底、第二衬底、辅助隔垫物、像素电极和公共电极。其中，第二衬底位于与第一衬底相对的位置上，并且在第二衬底上设置有像素电极和公共电极。辅助隔垫物位于第一衬底和第二衬底之间，并且固定于第一衬底上。
辅助隔垫物设置有顶部电极，第二衬底上对应顶部电极位置处设置有公共电极的延伸电极和像素电极的延伸电极。在面板受到挤压后，第一衬底和第二衬底之间的距离变小，面板中平躺的液晶分子受到挤压会站立起来，顶部电极会接触到像素电极的延伸电极和公共电极的延伸电极。顶部电极能够导电，其可以导通公共电极和像素电极从而消除公共电极和像素电极之间的电压差，使得站立或排列混乱的液晶分子无较强的竖直电场维持而迅速恢复平躺状态。
在本发明的一个实施例中，顶部电极设置为块状结构并且固定于辅助隔垫物的顶部。如图1所示，在玻璃基板11上设有黑矩阵层12及彩色层13，在黑矩阵层12上设置有辅助隔垫物141。玻璃基板11、黑色矩阵层12及彩色层13构成第一衬底。其中，在辅助隔垫物141的顶部固定有一个块状电极A(顶部电极)，该块状电极A具有导电功能。当然，该顶部电极不限于块状结构，其他形状或结构的导电电极均可作为此处的顶部电极。同时，将辅助隔垫物141设置于第一衬底的的黑矩阵层12上，避免了占用透光的彩色层13，有利于提高液晶显示面板的开口率。当然辅助隔垫物141也可以设置在像素的其他位置。
在本发明的一个实施例中，该块状电极可选择导电薄膜。其中，导电薄膜可选择ITO(IndiumTinOxide，掺锡氧化铟)薄膜。在本发明的一个实施例中，该块状电极可选择导电金属，导电金属可选择AL、Mo等导电金属。但是，块状电极不限于以上所述的导电薄膜或导电金属。
由于公共电极与像素电极形成于同一衬底上，为实现两者之间的电气隔绝，需在两者之间设置绝缘层。如图4所示，在基板27上设置公共电极22，在像素电极21和公共电极22之间设置一绝缘层26。基板27、公共电极22、绝缘层26和像素电极21构成第二 衬底2。为使得在滑动按压面板时，顶部电极A能与像素电极21和公共电极22接触，公共电极22与像素电极21均引出用于与顶部电极接触的延伸电极。
为使得顶部电极A能同时接触公共电极的延伸电极221和像素电极的延伸电极211，在本发明的一个实施例中，公共电极的延伸电极221的顶面与像素电极的延伸电极211的顶面设置成位于同一平面上。由于像素电极21与公共电极22之间设置有绝缘层26，则将公共电极的延伸电极区域与像素电极的延伸电极区域的绝缘层刻蚀掉。从而使得公共电极的延伸电极221与像素电极的延伸电极211在同一平面上形成，并使得两个延伸电极的顶面处于同一平面上，从而有利于顶部电极A与两个延伸电极同时接触，如图4所示。同时，为使得当手指滑动按压液晶显示面板上的任意位置时，均能有顶部电极导通公共电极和像素电极，所以，在本发明的一个实施例中，在液晶面板上的每一个像素均设置有具有顶部电极的辅助隔垫物。这样，就可以实现对每个像素中的液晶分子进行控制。
在本发明的一个实施例中，公共电极的延伸电极和像素电极的延伸电极均为密布的梳状电极，其中，公共电极的延伸电极和像素电极的延伸电极形成交指型关系。如图2所示，在第二衬底上设置有梳状的像素电极21和面状的公共电极22，在像素电极21和公共电极22之间设置有绝缘层(图2未示出)。在该第二衬底上还设置有栅线23、数据线24和TFT(Thin Film Transistor，薄膜场效应晶体管)开关25。同时，对应块状电极A的位置引出梳状延伸电极区A’。
如图3所示为图2中梳状延伸电极区A’的放大示意图。如图3所示，公共电极22的梳状延伸电极221和像素电极21的梳状延伸电极211形成交指型关系，并且梳齿之间的具有一定距离间隙以防止两者接触及两者之间的电场干扰。这样，在公共电极22的延伸电极和像素电极21的延伸电极之间产生水平电场，以避免产生其他方向的影响液晶分子旋转的杂乱电场。当然，公共电极的延伸电极221和像素电极的延伸电极211不限于以上的梳状交指结构。
为有利于顶部电极A接触公共电极的延伸电极221和像素电极的延伸电极211，顶部电极A的表面、公共电极的延伸电极221表面和像素电极的延伸电极211表面无取向材料。取向材料用于形成取向层，取向层用于对液晶分子进行取向。取向材料与液晶分子之间具有亲和力，为防止取向材料对液晶转向的影响以及影响块状电极A与延伸电极之间的导电性能，块状电极A与延伸电极的接触面上需去除取向材料。
在本发明的一个实施例中，在显示面板的第一衬底和第二衬底之间还设置有主要隔垫物142。该主要隔垫物142固定于第一衬底上，用以保证液晶盒的厚度及厚度均匀性，即保证第一衬底和第二衬底之间的间隙不变，如图1所示。该主要隔垫物142设置于第一衬 底的每个像素上的黑矩阵层12上，避免了占用透光的彩色层13，有利于提高液晶显示面板的开口率。当然主要隔垫物142也可设置在像素的其他位置。
该主要隔垫物142的高度需大于辅助隔垫物141的高度与顶部电极A的高度之和，以使得液晶面板在没有挤压时由于主要隔垫物142的存在，顶部电极A与延伸电极不能接触，保证液晶面板正常工作。在液晶面板受到挤压时，主要隔垫物142被压缩，第一衬底和第二衬底之间的距离变小，块状电极A将公共电极22与像素电极21导通。此时，像素电极21与公共电极22之间无电压差，像素电极21与公共电极22之间无较强垂直电场和其他混乱电场存在，受手指按压后站立或者排列混乱的液晶分子在锚定能和弹性回复力的作用下迅速回复平躺状态。当手指从面板上移开时，由于主要隔垫物142的支撑作用，块状电极A与公共电极的延伸电极221和像素电极的延伸电极211转为非接触状态，像素能够正常被供给信号来显示画面，使得液晶分子恢复按压之前的取向状态。
如图4所示为根据本发明的一个实施例的采用顶部电极A和延伸电极导通像素电极211和公共电极221的功能实现原理图。如图所示，当液晶面板受到挤压时，第一衬底1上的辅助隔垫物141上的块状电极A与公共电极的延伸电极221和像素电极的延伸电极211接触，从而使得像素电极21和公共电极22导通来消除两者的电压差。像素电极21和公共电极22之间无电压差，则在第一衬底1和第二衬底2之间无电场存在，受手指按压后站立或者排列混乱的液晶分子在锚定能和弹性回复力的作用下迅速回复平躺状态。
由于IPS、FFS模式液晶面板中，像素电极和公共电极在同一衬底上形成，像素电极与公共电极上下重叠排列，因此，像素电极与公共电极的排列方式分为两种。在本发明的一个实施例中，像素电极设置于第二衬底的顶部，公共电极设置于第二衬底的底部，在像素电极与公共电极之间设置一层绝缘层进行电气隔绝，如图4所示。
在本发明的另一个实施例中，公共电极设置于第二衬底的顶部，像素电极设置于第二衬底的底部，像素电极与公共电极之间设置一层绝缘层进行电气隔绝。这两种结构的液晶面板，均可以采用在辅助隔垫物上设置顶部电极的方法，使得在液晶面板按压后站立或排列混乱的液晶分子恢复平躺状态。
虽然本发明所公开的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所公开的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (20)

  1. 一种液晶显示面板，包括：
    第一衬底；
    第二衬底，其位于与所述第一衬底相对的位置上，并且在所述第二衬底上设置有像素电极和公共电极；
    辅助隔垫物，其位于所述第一衬底和所述第二衬底之间并固定于所述第一衬底上，
    其中，所述辅助隔垫物设置有顶部电极，所述第二衬底上对应所述顶部电极的位置处设置有所述公共电极的延伸电极和所述像素电极的延伸电极，以使得面板受到挤压导致所述第一衬底和所述第二衬底之间的距离变小时，所述顶部电极与所述公共电极的延伸电极和所述像素电极的延伸电极接触来导通所述公共电极和所述像素电极。
  2. 根据权利要求1所述的面板，其中，在所述第一衬底的每个像素上均设置有所述辅助隔垫物。
  3. 根据权利要求1所述的面板，其中，所述顶部电极设置为块状结构并且固定于所述辅助隔垫物的顶部。
  4. 根据权利要求1所述的面板，其中，所述公共电极的延仲电极的顶面与所述像素电极的延伸电极的顶面位于同一平面上。
  5. 根据权利要求4所述的面板，其中，所述公共电极的延仲电极和所述像素电极的延伸电极均为梳状电极，其中，所述公共电极的延伸电极和所述像素电极的延伸电极形成交指型关系。
  6. 根据权利要求1所述的面板，其中，所述面板还包括主要隔垫物，所述主要隔垫物设置于所述第一衬底和所述第二衬底之间并且固定于所述第一衬底上，所述主要隔垫物的高度大于所述辅助隔垫物的高度与所述顶部电极的高度之和。
  7. 根据权利要求1所述的面板，其中，所述顶部电极为导电薄膜。
  8. 根据权利要求1所述的面板，其中，所述顶部电极为导电金属。
  9. 根据权利要求1所述的面板，其中，所述像素电极设置于所述公共电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  10. 根据权利要求1所述的面板，其中，所述公共电极设置于所述像素电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  11. 根据权利要求2所述的面板，其中，所述像素电极设置于所述公共电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  12. 根据权利要求3所述的面板，其中，所述像素电极设置于所述公共电极的上部， 其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  13. 根据权利要求4所述的面板，其中，所述像素电极设置于所述公共电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  14. 根据权利要求5所述的面板，其中，所述像素电极设置于所述公共电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  15. 根据权利要求6所述的面板，其中，所述像素电极设置于所述公共电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  16. 根据权利要求2所述的面板，其中，所述公共电极设置于所述像素电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  17. 根据权利要求3所述的面板，其中，所述公共电极设置于所述像素电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  18. 根据权利要求4所述的面板，其中，所述公共电极设置于所述像素电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  19. 根据权利要求5所述的面板，其中，所述公共电极设置于所述像素电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
  20. 根据权利要求6所述的面板，其中，所述公共电极设置于所述像素电极的上部，其中，在所述像素电极和所述公共电极之间设置有绝缘层。
PCT/CN2015/075656 2015-03-17 2015-04-01 液晶显示面板 WO2016145681A1 (zh)

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CN109100891A (zh) * 2018-08-10 2018-12-28 厦门天马微电子有限公司 一种显示面板及显示装置
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