WO2018036028A1 - 像素电极 - Google Patents

像素电极 Download PDF

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Publication number
WO2018036028A1
WO2018036028A1 PCT/CN2016/110074 CN2016110074W WO2018036028A1 WO 2018036028 A1 WO2018036028 A1 WO 2018036028A1 CN 2016110074 W CN2016110074 W CN 2016110074W WO 2018036028 A1 WO2018036028 A1 WO 2018036028A1
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Prior art keywords
electrode
branch
bezel
branch electrodes
slots
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PCT/CN2016/110074
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English (en)
French (fr)
Inventor
叶岩溪
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深圳市华星光电技术有限公司
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Priority to US15/326,649 priority Critical patent/US10324340B2/en
Publication of WO2018036028A1 publication Critical patent/WO2018036028A1/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
    • G02F1/134336—Matrix
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel 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
    • 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
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • 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
    • G02F2201/122—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode having a particular pattern
    • 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
    • G02F2201/123—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode pixel

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a pixel electrode.
  • LCD Liquid Crystal Display
  • advantages such as thin body, power saving, no radiation, etc., such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or Laptop screens, etc., dominate the field of flat panel display.
  • PDA personal digital assistant
  • TFT-LCD Active Thin Film Transistor-LCD
  • TN Twisted Nematic
  • STN Super Twisted Nematic
  • IPS In-Plane Switching
  • VA Vertical Alignment
  • the VA type liquid crystal display has a very high contrast ratio with respect to other types of liquid crystal displays, and has a very wide application in a large-sized display such as a television.
  • the High Vertical Alignment (HVA) type is an important branch of the VA mode.
  • a liquid crystal display device includes a housing, a liquid crystal panel disposed in the housing, and a backlight module disposed in the housing.
  • the structure of the liquid crystal panel is mainly composed of a Thin Film Transistor Array Substrate (TFT Array Substrate), a Color Filter Substrate (CF Substrate), and a liquid crystal layer disposed between the two substrates (Liquid).
  • the crystal layer is constructed by controlling the rotation of the liquid crystal molecules of the liquid crystal layer by applying a driving voltage to the pixel electrodes of the TFT substrate and the common electrode of the CF substrate, and refracting the light of the backlight module to generate a picture. .
  • the HVA type liquid crystal display has a surface control effect on the liquid crystal rotation by growing a layer of a polymer which forms a specific pretilt angle on the alignment film, and has the advantages of lower cost and higher transmittance than other VA modes.
  • the pixel electrode has two structures of an opening and a sealing. Wherein, the pixel electrode of the open structure is not connected due to the electric field at the edge of the electrode, and the electric field intensity of the sealing structure is not large, so there is a phenomenon that there is a dark line between the electrodes, and the smaller the pixel, the more easy to appear.
  • the structure of the pixel electrode of the sealing structure is as shown in FIG. 1.
  • One pixel electrode is divided into four regions, and specifically includes: a cross-shaped keel 100, a rectangular frame 200, a plurality of strip-shaped first branch electrodes 301, and a plurality of Second strip a branch electrode 302, a plurality of strip-shaped third branch electrodes 303, and a plurality of strip-shaped fourth branch electrodes 304;
  • the frame 200 surrounds the keel 100 and encloses four rectangular electrode regions, respectively Second, third, and fourth electrode regions 401, 402, 403, 404;
  • the plurality of first branch electrodes 301 are spaced apart from each other in the first electrode region 401, and each of the first branch electrodes
  • Each of the 301 is connected to the keel 100 and the frame 200.
  • the plurality of second branch electrodes 302 are spaced apart from each other in the second electrode region 402, and each of the second branch electrodes 302 is coupled to the keel 100.
  • the frame 200 is connected to each other, and the plurality of third branch electrodes 303 are spaced apart from each other in the third electrode region 403, and each of the third branch electrodes 301 is connected to the keel 100 and the frame 200.
  • the fourth branch electrodes 304 are spaced apart from each other in the fourth electrode region 404, and each of the fourth branch electrodes 304 is connected to the keel 100 and the frame 200.
  • the first branch electrodes 301 and the second Branch electrode 302, third branch electrode 3 03 and the fourth branch electrode 303 are respectively inclined by a degree, (a+90) degree, -a degree, and -(a+90) degree with respect to the horizontal direction, and a is greater than 0 and less than 90. Since the extending direction of the bezel 200 is different from the extending directions of the first branch electrode 301, the second branch electrode 302, the third branch electrode 303, and the fourth branch electrode 303, the liquid crystal cannot be in the region corresponding to the bezel 200.
  • the first, second, third, and fourth electrode regions 401, 402, 403, and 404 are along the first branch electrode 301, the second branch electrode 302, the third branch electrode 303, and the fourth branch electrode 303, respectively.
  • the direction is poured, so that dark lines are likely to appear in the area corresponding to the frame 200. The appearance of dark lines is directly reflected in the transmittance of the pixels, thereby affecting the display brightness of the liquid crystal display panel.
  • An object of the present invention is to provide a pixel electrode capable of reducing dark lines at a pixel electrode frame, improving transmittance, and improving display performance of a liquid crystal display panel using the pixel electrode.
  • the present invention provides a pixel electrode comprising: a rectangular bezel electrode; a plurality of branch electrodes located inside the bezel electrode and connected to the bezel electrode;
  • the inner side of the bezel electrode includes four electrode regions distributed in a field shape, which are first, second, third, and fourth electrode regions, respectively;
  • the plurality of branch electrodes include: a plurality of strip-shaped first branch electrodes spaced apart from each other in the first electrode region, and a plurality of strip-shaped second branch electrodes spaced apart from each other in the second electrode region a plurality of strip-shaped third branch electrodes distributed in parallel with each other in the third electrode region, and a plurality of strip-shaped fourth branch electrodes spaced apart from each other in the fourth electrode region, wherein a is greater than 0 and less than 90 ;
  • the outer portion of at least one pair of opposite sides of the bezel electrode has a zigzag structure, including a plurality of spacers a slot of the cloth, the slot has two sides, the sides of the slot are parallel to the length direction of the branch electrode in the electrode region corresponding to the slot, and the depth of the slot is smaller than The width of the edge of the border electrode.
  • the outer sides of the pair of opposite sides of the bezel electrode have a zigzag structure.
  • the outer sides of the two opposite sides of the bezel electrode have a zigzag structure.
  • the slot is in one-to-one correspondence with the branch electrodes to which the side is located, and the center line of each slot coincides with the center line of the corresponding branch electrode.
  • each of the slots is equal to the width of the corresponding branch electrode.
  • the slot is in one-to-one correspondence with the slot between the branch electrodes to which the edge is located, and the center line of each slot coincides with the center line of the slot between the corresponding branch electrodes.
  • each of the slots is equal to the width of the gap between the corresponding branch electrodes.
  • a keel electrode is also included.
  • the four end points of the keel electrode are respectively connected to the midpoints of the four sides of the bezel electrode, and the two ends of the branch electrode are respectively connected to the keel electrode and the bezel electrode.
  • the first branch electrode is inclined by a degree with respect to a horizontal direction
  • the second branch electrode is inclined by a +90 degrees with respect to a horizontal direction
  • the third branch electrode is inclined by -a degrees with respect to a horizontal direction
  • the fourth branch The electrode is inclined - (a + 90) degrees with respect to the horizontal direction, wherein a is greater than 0 and less than 90;
  • the plurality of first branch electrodes and the plurality of second branch electrodes are symmetric about a vertical center line of the bezel electrode, and the plurality of second branch electrodes and the plurality of third branch electrodes are related to the bezel
  • the horizontal center line of the electrode is symmetrical, and the third branch electrode and the fourth branch electrode are symmetric with respect to a vertical center line of the bezel electrode.
  • the material of the pixel electrode is a metal or a metal oxide.
  • the present invention also provides a pixel electrode comprising: a rectangular bezel electrode, a plurality of branch electrodes located inside the bezel electrode and connected to the bezel electrode;
  • the inner side of the bezel electrode includes four electrode regions distributed in a field shape, which are first, second, third, and fourth electrode regions, respectively;
  • the plurality of branch electrodes include: a plurality of strip-shaped first branch electrodes spaced apart from each other in the first electrode region, and a plurality of strip-shaped second branch electrodes spaced apart from each other in the second electrode region a plurality of strip-shaped third branch electrodes distributed in parallel with each other in the third electrode region, and a plurality of strip-shaped fourth branch electrodes spaced apart from each other in the fourth electrode region;
  • the outer surface of at least one pair of opposite sides of the bezel electrode has a zigzag structure, and includes a plurality of spaced-apart slots, the slots have two sides, and both sides of the slot correspond to the slots
  • the length direction of the branch electrodes in the electrode region is parallel, and the depth of the tooth groove is smaller than the frame of the frame
  • keel electrode Further comprising a cross-shaped keel electrode, wherein the four end points of the keel electrode are respectively connected to the midpoints of the four sides of the bezel electrode, and the two ends of the branch electrode are respectively connected to the keel electrode and the bezel electrode;
  • the material of the pixel electrode is a metal or a metal oxide.
  • the present invention provides a pixel electrode having a closed bezel electrode, and at least a pair of opposite sides of the bezel electrode have a zigzag structure, and the zigzag of the zigzag structure
  • the extending direction is parallel with the extending direction of the corresponding branch electrode of the pixel electrode, so that the liquid crystal can be tilted along the direction of the branch electrode as in the inner region of the bezel electrode in the region corresponding to the bezel electrode, thereby avoiding the corresponding corresponding to the bezel electrode.
  • the dark spot appears in the area, and the pixel electrode is applied to the HVA type liquid crystal display panel, which can effectively improve the transmittance and brightness of the liquid crystal display panel, thereby improving the display effect.
  • 1 is a pixel electrode structure of a conventional HVA type liquid crystal display panel
  • FIG. 2 is a structural view of a first embodiment of a pixel electrode of the present invention
  • Fig. 3 is a structural view showing a second embodiment of the pixel electrode of the present invention.
  • the present invention provides a pixel electrode comprising: a rectangular bezel electrode 20, a plurality of branch electrodes 30 located inside the bezel electrode 20 and connected to the bezel 20;
  • the inner side of the bezel electrode 20 includes four electrode regions distributed in a field shape, which are first, second, third, and fourth electrode regions 41, 42, 43, 44, respectively;
  • the plurality of branch electrodes 30 include: a plurality of strip-shaped first branch electrodes 31 located in the first electrode region 41 and inclined in a horizontal direction with respect to the horizontal direction and spaced apart from each other, and a plurality of strips in the second electrode region 42 a strip-shaped second branch electrode 32 which is inclined by a + 90 degrees with respect to the horizontal direction and which is spaced apart from each other in parallel with each other, and a stripe which is located in the third electrode region 43 and which is inclined by -a degrees with respect to the horizontal direction and which are spaced apart from each other in parallel a third branch electrode 33 and a fourth electrode region 44
  • a plurality of strip-shaped fourth branch electrodes 34, a which are inclined at - (a + 90) degrees with respect to the horizontal direction and are spaced apart from each other in parallel, are larger than 0 and smaller than 90, and preferably a is equal to 45.
  • the outer pair of opposite sides of the bezel electrode 20 has a zigzag structure, and includes a plurality of spaced-apart slots 21, the slots 21
  • the two sides of the tooth groove 21 are parallel to the longitudinal direction of the branch electrode 30 in the electrode region corresponding to the tooth groove 21, that is, the branch electrode 30 corresponding to the tooth groove 21 and the tooth groove 21
  • the extending direction of the slot 21 is smaller than the width of the edge of the bezel electrode 20, that is, the bottom edge of the slot 21 needs to be kept safe from the inner edge of the edge of the bezel electrode 20 The distance is to avoid damaging the closed structure of the bezel electrode 20.
  • the tooth grooves 21 are in one-to-one correspondence with the branch electrodes 30 to which the sides on which they are located, and the center line of each of the tooth grooves 21 coincides with the center line of the branch electrode 30 corresponding thereto. That is, the tooth groove 21 is opened in the extending direction of each branch electrode 30. Specifically, the width of the tooth groove 21 is smaller than the sum of the width of the corresponding branch electrode 30 and the width of the slit on both sides thereof, preferably The width of the tooth groove 21 is equal to the width of the branch electrode 30 corresponding thereto.
  • the slots 21 are not limited to the one-to-one correspondence of the branch electrodes 30 connected to the side where they are located, and may also correspond one-to-one with the gap between the branch electrodes 30 connected to the side where they are located.
  • the center line of 21 coincides with the center line of the corresponding slit, and the width of the tooth groove 21 is smaller than the sum of the width of the corresponding slit and the width of the branch electrodes 30 on both sides of the slit, preferably the width of each of the slots 21.
  • the width of the gap corresponding to it is equal.
  • the slot 21 may not correspond to the slot or the branch electrode 30, and the position and the number of the slots 21 may be correspondingly set as needed, as long as the slot 21 extends and the slot 21
  • the extending direction of the branch electrodes 30 in the corresponding electrode regions is parallel, and the depth of the slots 21 is smaller than the width of the sides of the bezel electrode 20, so that the liquid crystal on the corresponding region of the bezel electrode 20 can be directed to the inside of the bezel electrode 20.
  • the area is tilted in the same direction along the branch electrode 30 to avoid dark lines.
  • the outer side of the pair of opposite sides of the bezel electrode 20 has a zigzag structure. Accordingly, the present invention can also provide a shorter one of the bezel electrode 20.
  • the present invention can also be realized by a zigzag structure on the outer side of the opposite side.
  • the outer sides of the two opposite sides of the bezel electrode 20 have a zigzag structure as compared with the first embodiment, so that the bezel electrode 20 can be further reduced.
  • the display effect is improved, and the rest are the same as those in the first embodiment, and details are not described herein again.
  • the pixel electrode further includes a ten a keel electrode 10 of the glyph, the four end points of the keel electrode 10 are respectively connected to the midpoints of the four sides of the bezel electrode 20, and the two ends of the branch electrode 30 are respectively connected to the keel electrode 10 and the bezel electrode 20, at this time,
  • a keel tooth groove 22 is provided on the outside of the intersection of the frame electrode 20 and the keel electrode 10, and the keel tooth groove 22 is opened in the extending direction of the keel electrode 10.
  • the plurality of first branch electrodes 31 and the plurality of second branch electrodes 32 are symmetric with respect to a vertical center line of the bezel electrode 20, the plurality of second branch electrodes 32 and the plurality of The three branch electrodes 33 are symmetrical about a horizontal center line of the bezel electrode 20, and the third branch electrode 33 and the fourth branch electrode 34 are symmetrical about a vertical center line of the bezel electrode 20.
  • a branch electrode that is asymmetrically arranged, which is not a limitation of the present invention.
  • the material of the pixel electrode is a metal, or a metal oxide.
  • the present invention provides a pixel electrode having a closed bezel electrode, and at least a pair of opposite sides of the bezel electrode have a zigzag structure, and the zigzag extension of the zigzag structure
  • the direction is parallel with the extending direction of the corresponding branch electrode of the pixel electrode, so that the liquid crystal can be tilted along the direction of the branch electrode as in the inner region of the bezel electrode in the region corresponding to the bezel electrode, thereby avoiding the corresponding corresponding to the bezel electrode.
  • the dark lines appear in the area, and the pixel electrode is applied to the HVA type liquid crystal display panel, which can effectively improve the transmittance and brightness of the liquid crystal display panel, thereby improving the display effect.

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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)
  • Geometry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种像素电极，该像素电极具有封闭的边框电极(20)，并且边框电极(20)的至少一对对边的外部呈锯齿形结构，所述锯齿形结构的齿槽(21)的延伸方向与该像素电极的相应分支电极(30)的延伸方向平行一致，进而使得在边框电极(20)对应的区域上，液晶可以像在边框电极(20)的内侧区域上一样沿着分支电极(30)的方向进行倾倒，避免边框电极(20)对应的区域出现暗纹，将该像素电极应用于HVA型液晶显示面板，能够有效提升该液晶显示面板的穿透率和亮度，从而改善显示效果。

Description

像素电极 技术领域
本发明涉及显示技术领域，尤其涉及一种像素电极。
背景技术
液晶显示器(Liquid Crystal Display，LCD)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用，如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等，在平板显示领域中占主导地位。
主动式薄膜晶体管液晶显示器(Thin Film Transistor-LCD，TFT-LCD)是目前主流市场最常见的液晶显示器，按照液晶驱动方式的不同其又可大致分为：扭曲向列(Twisted Nematic，TN)或超扭曲向列(Super Twisted Nematic，STN)型，平面转换(In-Plane Switching，IPS)型、及垂直配向(Vertical Alignment，VA)型。其中VA型液晶显示器相对其他种类的液晶显示器具有极高的对比度，在大尺寸显示，如电视等方面具有非常广的应用。而高垂直配向(High Vertical Alignment，HVA)型是VA模式中一个重要的分支。
通常液晶显示装置包括壳体、设于壳体内的液晶面板及设于壳体内的背光模组(Backlight module)。其中，液晶面板的结构主要是由一薄膜晶体管阵列基板(Thin FilmTransistor Array Substrate，TFT Array Substrate)、一彩色滤光片基板(Color FilterSubstrate，CF Substrate)、以及配置于两基板间的液晶层(Liquid Crystal Layer)所构成，其工作原理是通过在两片向TFT基板的像素电极和CF基板的公共电极上施加驱动电压来控制液晶层的液晶分子的旋转，将背光模组的光线折射出来产生画面。
HVA型液晶显示器通过在配向膜上生长一层使液晶形成特定预倾角的聚合物，对液晶转动起到面控作用，相对于其他VA模式具有较低的成本和较高的穿透率的优点。在HVA型液晶显示器中，像素电极具有开口和封口两种结构。其中，开口结构的像素电极，由于电极边缘的电场不具有联系性，并且没有封口结构的电场强度大，所以会出现电极之间有暗线的现象，这种现象在像素越小的情况下，越容易出现。而封口结构的像素电极其结构如图1所示，一个像素电极被划分为四个区域，具体包括：十字形的龙骨100、矩形的边框200、多个条状的第一分支电极301、多个条状的第二 分支电极302、多个条状的第三分支电极303、及多个条状的第四分支电极304；所述边框200包围所述龙骨100，围成四个矩形的电极区，分别为第一、第二、第三、及第四电极区401、402、403、404；所述多个第一分支电极301相互平行间隔分布于所述第一电极区401内，且每一个第一分支电极301均与所述龙骨100以及边框200相连，所述多个第二分支电极302相互平行间隔分布于所述第二电极区402内，且每一个第二分支电极302均与所述龙骨100以及边框200相连，所述多个第三分支电极303相互平行间隔分布于所述第三电极区403内，且每一个第三分支电极301均与与所述龙骨100以及边框200相连，所述多个第四分支电极304相互平行间隔分布于所述第四电极区404内，且每一个第四分支电极304均与与所述龙骨100以及边框200相连，所述第一分支电极301、第二分支电极302、第三分支电极303、及第四分支电极303分别相对于水平方向倾斜a度、(a+90)度、-a度、及-(a+90)度，a大于0且小于90。由于边框200的延伸方向与第一分支电极301、第二分支电极302、第三分支电极303、及第四分支电极303的延伸方向均不相同，所以在边框200对应的区域，液晶无法像在第一、第二、第三、及第四电极区401、402、403、404内一样分别沿着第一分支电极301、第二分支电极302、第三分支电极303、及第四分支电极303的方向进行倾倒，所以在边框200对应的区域容易出现暗纹。而暗纹的出现直接体现在像素的穿透率上，从而影响液晶显示面板的显示亮度。
发明内容
本发明的目的在于提供一种像素电极，能够减少像素电极边框处的暗纹，提升穿透率，提升采用该像素电极的液晶显示面板的显示效果。
为实现上述目的，本发明提供了一种像素电极，包括：矩形的边框电极、位于所述边框电极内侧并连接该边框电极的多个分支电极；
所述边框电极的内侧包括呈田字型分布的四个电极区域，分别为第一、第二、第三、及第四电极区域；
所述多个分支电极包括：位于第一电极区域内的多个相互平行间隔分布的条状的第一分支电极、位于第二电极区域内多个相互平行间隔分布的条状的第二分支电极、位于第三电极区域内多个相互平行间隔分布的条状的第三分支电极、及位于第四电极区域内多个相互平行间隔分布的条状的第四分支电极，a大于0且小于90；
所述边框电极的至少一对对边的外部呈锯齿形结构，包括多个间隔分 布的齿槽，所述齿槽的具有两侧边，所述齿槽的两侧边与该齿槽所对应的电极区域内的分支电极的长度方向平行，所述齿槽的深度小于其所在边框电极的边的宽度。
所述边框电极的一对对边的外部呈锯齿形结构。
所述边框电极的两对对边的外部呈锯齿形结构。
所述齿槽与其所在的边所连接的分支电极一一对应，各个齿槽的中心线与其所对应的分支电极的中心线重合。
各个齿槽的宽度与其所对应的分支电极的宽度相等。
所述齿槽与其所在的边所连接的各个分支电极之间的缝隙一一对应，各个齿槽的中心线与其所对应的分支电极之间的缝隙的中心线重合。
各个齿槽的宽度与其所对应的分支电极之间的缝隙的宽度相等。
还包括一十字形的龙骨电极，所述龙骨电极的四个端点分别与所述边框电极的四边的中点相连，所述分支电极的两端分别连接龙骨电极和边框电极。
所述第一分支电极相对于水平方向倾斜a度，所述第二分支电极相对于水平方向倾斜a+90度，所述第三分支电极相对于水平方向倾斜-a度，所述第四分支电极相对于水平方向倾斜-(a+90)度，其中，a大于0且小于90；
所述多个第一分支电极与所述多个第二分支电极关于所述边框电极的竖直中心线对称，所述多个第二分支电极和所述多个第三分支电极关于所述边框电极的水平中心线对称，所述第三分支电极与所述第四分支电极关于所述边框电极的竖直中心线对称。
所述像素电极的材料为金属、或金属氧化物。
本发明还提供一种像素电极，包括：矩形的边框电极、位于所述边框电极内侧并连接该边框电极的多个分支电极；
所述边框电极的内侧包括呈田字型分布的四个电极区域，分别为第一、第二、第三、及第四电极区域；
所述多个分支电极包括：位于第一电极区域内的多个相互平行间隔分布的条状的第一分支电极、位于第二电极区域内多个相互平行间隔分布的条状的第二分支电极、位于第三电极区域内多个相互平行间隔分布的条状的第三分支电极、及位于第四电极区域内多个相互平行间隔分布的条状的第四分支电极；
所述边框电极的至少一对对边的外部呈锯齿形结构，包括多个间隔分布的齿槽，所述齿槽具有两侧边，所述齿槽的两侧边与该齿槽所对应的电极区域内的分支电极的长度方向平行，所述齿槽的深度小于其所在边框电 极的边的宽度；
还包括一十字形的龙骨电极，所述龙骨电极的四个端点分别与所述边框电极的四边的中点相连，所述分支电极的两端分别连接龙骨电极和边框电极；
其中，所述像素电极的材料为金属、或金属氧化物。
本发明的有益效果：本发明提供了一种像素电极，该像素电极的具有封闭的边框电极，并且边框电极的至少一对对边的外部呈锯齿形结构，所述锯齿形结构的齿槽的延伸方向与该像素电极的相应分支电极的延伸方向平行一致，进而使得在边框电极对应的区域上，液晶可以像在边框电极的内侧区域上一样沿着分支电极的方向进行倾倒，避免边框电极对应的区域出现暗纹，将该像素电极应用于HVA型液晶显示面板，能够有效提升该液晶显示面板的穿透率和亮度，从而改善显示效果。
附图说明
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。
附图中，
图1为现有的HVA型液晶显示面板的像素电极结构；
图2为本发明的像素电极的第一实施例的结构图；
图3为本发明的像素电极的第二实施例的结构图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图2至图3，本发明提供一种像素电极，包括：矩形的边框电极20、位于所述边框电极20内侧并连接该边框20的多个分支电极30；
所述边框电极20的内侧包括呈田字型分布的四个电极区域，分别为第一、第二、第三、及第四电极区域41、42、43、44；
所述多个分支电极30包括：位于第一电极区域41内的多个相对于水平方向倾斜a度且相互平行间隔分布的条状的第一分支电极31、位于第二电极区域42内多个相对于水平方向倾斜a+90度且相互平行间隔分布的条状的第二分支电极32、位于第三电极区域43内多个相对于水平方向倾斜-a度且相互平行间隔分布的条状的第三分支电极33、及位于第四电极区域44 内多个相对于水平方向倾斜-(a+90)度且相互平行间隔分布的条状的第四分支电极34，a大于0且小于90，优选a等于45。
请参阅图2，在本发明的第一实施例中，所述边框电极20的较长的一对对边的外部呈锯齿形结构，包括多个间隔分布的齿槽21，所述齿槽21具有两侧边，所述齿槽21的两侧边与该齿槽21所对应的电极区域内的分支电极30的长度方向平行，即所述齿槽21与该齿槽21相应的分支电极30的延伸方向平行一致，所述齿槽21的深度小于其所在边框电极20的边的宽度，即所述齿槽21的底边距离其所在边框电极20的边的内侧边缘还需要保持一定的安全距离，以避免破坏所述边框电极20的封闭结构。
进一步地，在本发明的第一实施例中，所述齿槽21与其所在的边所连接的分支电极30一一对应，各个齿槽21的中心线与其所对应的分支电极30的中心线重合，也即所述齿槽21开设在各个分支电极30的延伸方向上，具体地，所述齿槽21的宽度小于其对应分支电极30的宽度与其两侧的缝隙的宽度之和，优选地所述齿槽21的宽度等于其所对应的分支电极30的宽度。
可以理解的是，所述齿槽21并不限于与其所在的边连接的分支电极30一一对应，其也可以与其所在的边连接的各个分支电极30之间的缝隙一一对应，各个齿槽21的中心线与其所对应的缝隙的中心线重合，此时所述齿槽21的宽度小于其对应缝隙的宽度与该缝隙两侧的分支电极30的宽度之和，优选各个齿槽21的宽度与其所对应的缝隙的宽度相等。当然，所述齿槽21也可以既不与缝隙对应也不与分支电极30对应，其设置的位置与数量可以根据需要进行相应的设置，只要所述齿槽21的延伸方向与该齿槽21对应的电极区域内的分支电极30的延伸方向平行一致，所述齿槽21的深度小于所述边框电极20的边的宽度，能够使得边框电极20对应区域上的液晶能够向在边框电极20内侧区域上一样沿着分支电极30的方向进行倾倒，避免出现暗纹即可。另外，在本发明的第一实施例中，所述边框电极20的较长的一对对边的外部呈锯齿形结构，相应的，本发明还可以设置所述边框电极20的较短的一对对边的外部呈锯齿形结构，同样可以实现本发明。
请参阅图3，在本发明的第二实施例中，与所述第一实施例相比，所述边框电极20的两对对边的外部都呈锯齿形结构，这样可进一步减少边框电极20对应区域内的暗纹，提升显示效果，其余均与第一实施例相同，此处不再赘述。
进一步地，在本发明第一和第二实施例中，所述像素电极还包括一十 字形的龙骨电极10，所述龙骨电极10的四个端点分别与所述边框电极20的四边的中点相连，所述分支电极30的两端分别连接龙骨电极10和边框电极20，此时，所述边框电极20与龙骨电极10交汇处的外部还设有龙骨齿槽22，该龙骨齿槽22开设在龙骨电极10的延伸方向上。当然，也可以采用无龙骨电极的技术方案，这并不是对本发明的限制。
优选地，所述多个第一分支电极31与所述多个第二分支电极32关于所述边框电极20的竖直中心线对称，所述多个第二分支电极32和所述多个第三分支电极33关于所述边框电极20的水平中心线对称，所述第三分支电极33与所述第四分支电极34关于所述边框电极20的竖直中心线对称。当然，也可以采用非对称设置的分支电极，这也不是对本发明的限制。
优选地，所述像素电极的材料为金属、或金属氧化物。
综上所述，本发明提供了一种像素电极，该像素电极的具有封闭的边框电极，并且边框电极的至少一对对边的外部呈锯齿形结构，所述锯齿形结构的齿槽的延伸方向与该像素电极的相应分支电极的延伸方向平行一致，进而使得在边框电极对应的区域上，液晶可以像在边框电极的内侧区域上一样沿着分支电极的方向进行倾倒，避免边框电极对应的区域出现暗纹，将该像素电极应用于HVA型液晶显示面板，能够有效提升该液晶显示面板的穿透率和亮度，从而改善显示效果。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (18)

  1. 一种像素电极，包括：矩形的边框电极、位于所述边框电极内侧并连接该边框电极的多个分支电极；
    所述边框电极的内侧包括呈田字型分布的四个电极区域，分别为第一、第二、第三、及第四电极区域；
    所述多个分支电极包括：位于第一电极区域内的多个相互平行间隔分布的条状的第一分支电极、位于第二电极区域内多个相互平行间隔分布的条状的第二分支电极、位于第三电极区域内多个相互平行间隔分布的条状的第三分支电极、及位于第四电极区域内多个相互平行间隔分布的条状的第四分支电极；
    所述边框电极的至少一对对边的外部呈锯齿形结构，包括多个间隔分布的齿槽，所述齿槽具有两侧边，所述齿槽的两侧边与该齿槽所对应的电极区域内的分支电极的长度方向平行，所述齿槽的深度小于其所在边框电极的边的宽度。
  2. 如权利要求1所述的像素电极，其中，所述边框电极的一对对边的外部呈锯齿形结构。
  3. 如权利要求1所述的像素电极，其中，所述边框电极的两对对边的外部呈锯齿形结构。
  4. 如权利要求1所述的像素电极，其中，所述齿槽与其所在的边所连接的分支电极一一对应，各个齿槽的中心线与其所对应的分支电极的中心线重合。
  5. 如权利要求4所述的像素电极，其中，各个齿槽的宽度与其所对应的分支电极的宽度相等。
  6. 如权利要求1所述的像素电极，其中，所述齿槽与其所在的边所连接的各个分支电极之间的缝隙一一对应，各个齿槽的中心线与其所对应的分支电极之间的缝隙的中心线重合。
  7. 如权利要求6所述的像素电极，其中，各个齿槽的宽度与其所对应的分支电极之间的缝隙的宽度相等。
  8. 如权利要求1所述的像素电极，还包括一十字形的龙骨电极，所述龙骨电极的四个端点分别与所述边框电极的四边的中点相连，所述分支电极的两端分别连接龙骨电极和边框电极。
  9. 如权利要求1所述的像素电极，其中，所述第一分支电极相对于水 平方向倾斜a度，所述第二分支电极相对于水平方向倾斜a+90度，所述第三分支电极相对于水平方向倾斜-a度，所述第四分支电极相对于水平方向倾斜-(a+90)度，其中，a大于0且小于90；
    所述多个第一分支电极与所述多个第二分支电极关于所述边框电极的竖直中心线对称，所述多个第二分支电极和所述多个第三分支电极关于所述边框电极的水平中心线对称，所述第三分支电极与所述第四分支电极关于所述边框电极的竖直中心线对称。
  10. 如权利要求1所述的像素电极，其中，所述像素电极的材料为金属、或金属氧化物。
  11. 一种像素电极，包括：矩形的边框电极、位于所述边框电极内侧并连接该边框电极的多个分支电极；
    所述边框电极的内侧包括呈田字型分布的四个电极区域，分别为第一、第二、第三、及第四电极区域；
    所述多个分支电极包括：位于第一电极区域内的多个相互平行间隔分布的条状的第一分支电极、位于第二电极区域内多个相互平行间隔分布的条状的第二分支电极、位于第三电极区域内多个相互平行间隔分布的条状的第三分支电极、及位于第四电极区域内多个相互平行间隔分布的条状的第四分支电极；
    所述边框电极的至少一对对边的外部呈锯齿形结构，包括多个间隔分布的齿槽，所述齿槽具有两侧边，所述齿槽的两侧边与该齿槽所对应的电极区域内的分支电极的长度方向平行，所述齿槽的深度小于其所在边框电极的边的宽度；
    还包括一十字形的龙骨电极，所述龙骨电极的四个端点分别与所述边框电极的四边的中点相连，所述分支电极的两端分别连接龙骨电极和边框电极；
    其中，所述像素电极的材料为金属、或金属氧化物。
  12. 如权利要求11所述的像素电极，其中，所述边框电极的一对对边的外部呈锯齿形结构。
  13. 如权利要求11所述的像素电极，其中，所述边框电极的两对对边的外部呈锯齿形结构。
  14. 如权利要求11所述的像素电极，其中，所述齿槽与其所在的边所连接的分支电极一一对应，各个齿槽的中心线与其所对应的分支电极的中心线重合。
  15. 如权利要求14所述的像素电极，其中，各个齿槽的宽度与其所对 应的分支电极的宽度相等。
  16. 如权利要求11所述的像素电极，其中，所述齿槽与其所在的边所连接的各个分支电极之间的缝隙一一对应，各个齿槽的中心线与其所对应的分支电极之间的缝隙的中心线重合。
  17. 如权利要求16所述的像素电极，其中，各个齿槽的宽度与其所对应的分支电极之间的缝隙的宽度相等。
  18. 如权利要求11所述的像素电极，其中，所述第一分支电极相对于水平方向倾斜a度，所述第二分支电极相对于水平方向倾斜a+90度，所述第三分支电极相对于水平方向倾斜-a度，所述第四分支电极相对于水平方向倾斜-(a+90)度，其中，a大于0且小于90；
    所述多个第一分支电极与所述多个第二分支电极关于所述边框电极的竖直中心线对称，所述多个第二分支电极和所述多个第三分支电极关于所述边框电极的水平中心线对称，所述第三分支电极与所述第四分支电极关于所述边框电极的竖直中心线对称。
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