WO2019051958A1 - 一种液晶显示面板及其像素单元 - Google Patents

一种液晶显示面板及其像素单元 Download PDF

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Publication number
WO2019051958A1
WO2019051958A1 PCT/CN2017/109108 CN2017109108W WO2019051958A1 WO 2019051958 A1 WO2019051958 A1 WO 2019051958A1 CN 2017109108 W CN2017109108 W CN 2017109108W WO 2019051958 A1 WO2019051958 A1 WO 2019051958A1
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WO
WIPO (PCT)
Prior art keywords
electrode
pixel
lateral
sub
trunk
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PCT/CN2017/109108
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English (en)
French (fr)
Inventor
叶岩溪
Original Assignee
深圳市华星光电半导体显示技术有限公司
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Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to US15/576,758 priority Critical patent/US10386683B2/en
Priority to JP2020515187A priority patent/JP7007465B2/ja
Priority to EP17925099.8A priority patent/EP3683622A4/en
Priority to KR1020207010907A priority patent/KR102315737B1/ko
Publication of WO2019051958A1 publication Critical patent/WO2019051958A1/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
    • G02F1/1337—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
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134345—Subdivided pixels, e.g. for grey scale or redundancy
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal display panel and a pixel unit thereof.
  • the HVA (PSVA) mode in liquid crystal display technology is one of many VA modes.
  • the pixel structure of the HVA mode does not require protrusions, which has great advantages over PVA and MVA, such as reducing the process of the protrusions, reducing the topographic effects caused by the protrusions, and reducing the influence of the particles caused by the protrusions. Wait.
  • FIG. 4 is a schematic diagram of a prior art HVA pixel structure.
  • the cross-shaped stem electrode 401 in the middle of the pixel electrode is a boundary line between domains, and is also a place where dark lines are generated. Due to the opposite direction of the liquid crystal tilting between the domains, dark lines are inevitably generated. The dark lines are caused by the collision of the liquid crystal tilting direction, and the liquid crystal tilting is also affected by the topography, so the appearance of the dark lines may be irregular.
  • the pixel structure of the prior art has an opposite direction of tilting of the liquid crystal in the corresponding region of the cross-shaped main electrode, thereby inevitably generating dark lines, thereby affecting the performance of the display device.
  • the invention provides a liquid crystal display panel and a pixel unit thereof, which can reduce the occurrence of dark lines at the cross-shaped main electrode of the pixel electrode, thereby improving the performance of the display device.
  • the invention provides a pixel unit, comprising:
  • a main electrode connected to the peripheral frame, the main electrode having a cross shape, the main electrode including a transverse main electrode and a vertical main electrode perpendicular to each other, wherein the lateral main electrode and the longitudinal main electrode are The pixel electrode is divided into four regions;
  • one end of the branch electrode is connected to the peripheral frame, and the other end is connected to the horizontal trunk electrode / the longitudinal trunk electrode;
  • the stem electrodes are parallel to each other and spaced apart from each other, and are connected to the lateral stem electrode/the longitudinal stem electrode at a first predetermined angle;
  • the first dry electrode is parallel to the fourth dry electrode, the second dry electrode is parallel to the third dry electrode, and the first dry electrode and the third dry electrode are at a second predetermined angle;
  • the lateral trunk electrode is provided with a first through hole
  • the longitudinal trunk electrode is provided with a second through hole
  • the first through hole is connected to the second through hole
  • the trunk electrode is formed in a cross shape a ring-shaped center
  • a center of a intersection of the lateral trunk electrode and the longitudinal stem electrode is a hollow structure
  • the first sub-pixel electrode, the second sub-pixel electrode, the third sub-pixel electrode, and the fourth The sub-pixel electrodes are connected to each other through the peripheral bezel.
  • the pixel unit further includes a light shielding metal layer and a common electrode, the light shielding metal layer is provided with a light shielding electrode, the lateral light shielding electrode corresponds to the lateral trunk electrode, and the longitudinal light shielding electrode corresponds to the vertical direction A main electrode, the lateral shading electrode and the longitudinal shading electrode are both connected to the common electrode.
  • the projection of the lateral light-shielding electrode on the pixel electrode covers the first through hole
  • the projection of the vertical light-shielding electrode on the pixel electrode covers the second through hole
  • the lateral shading electrodes are equal in width to the longitudinal shading electrodes.
  • the first through hole extends from one end of the lateral trunk electrode along the extending direction of the lateral trunk electrode to the other end, and the second through hole is formed by one end of the longitudinal trunk electrode Extending along the extending direction of the longitudinal trunk electrode to the other end; the first through hole and the second through hole dividing the pixel electrode into a first sub-pixel electrode, a second sub-pixel electrode, and a third sub-pixel An electrode and a fourth sub-pixel electrode.
  • the first sub-trunk electrode extends in the first via region of the lateral trunk electrode along the extending direction of the branch electrode until the intersection, along the extending direction of the branch electrode
  • the second via region of the longitudinal stem electrode extends out of the second sub-backbone electrode until it meets.
  • the first sub-backbone electrode and the second sub-parent electrode coincide.
  • a fifth sub-pixel electrode is extended from one end of the lateral trunk electrode toward the peripheral frame, and the fifth sub-pixel electrode passes through a third pass corresponding to the corresponding region of the lateral trunk electrode.
  • a hole connects the pixel electrode to the switching unit.
  • the present invention also provides a liquid crystal display panel comprising the pixel unit described above.
  • the invention also provides a pixel unit comprising:
  • a main electrode connected to the peripheral frame, the main electrode having a cross shape, the main electrode including a transverse main electrode and a vertical main electrode perpendicular to each other, wherein the lateral main electrode and the longitudinal main electrode are The pixel electrode is divided into four regions;
  • one end of the branch electrode is connected to the peripheral frame, and the other end is connected to the horizontal trunk electrode / the longitudinal trunk electrode;
  • the stem electrodes are parallel to each other and spaced apart from each other, and are connected to the lateral stem electrode/the longitudinal stem electrode at a first predetermined angle;
  • the first dry electrode is parallel to the fourth dry electrode, the second dry electrode is parallel to the third dry electrode, and the first dry electrode and the third dry electrode are at a second predetermined angle;
  • the lateral trunk electrode is provided with a first through hole
  • the longitudinal trunk electrode is provided with a second through hole
  • the first through hole is connected to the second through hole
  • the trunk electrode is formed in a cross shape ring.
  • the pixel unit further includes a light shielding metal layer and a common electrode, the light shielding metal layer is provided with a light shielding electrode, the lateral light shielding electrode corresponds to the lateral trunk electrode, and the longitudinal light shielding electrode corresponds to the vertical direction A main electrode, the lateral shading electrode and the longitudinal shading electrode are both connected to the common electrode.
  • the projection of the lateral light-shielding electrode on the pixel electrode covers the first through hole
  • the projection of the vertical light-shielding electrode on the pixel electrode covers the second through hole
  • the lateral shading electrodes are equal in width to the longitudinal shading electrodes.
  • the first through hole extends from one end of the lateral trunk electrode along the extending direction of the lateral trunk electrode to the other end, and the second through hole is formed by one end of the longitudinal trunk electrode Extending along the extending direction of the longitudinal trunk electrode to the other end; the first through hole and the second through hole dividing the pixel electrode into a first sub-pixel electrode, a second sub-pixel electrode, and a third sub-pixel An electrode and a fourth sub-pixel electrode.
  • the first sub-trunk electrode extends in the first via region of the lateral trunk electrode along the extending direction of the branch electrode until the intersection, along the extending direction of the branch electrode
  • the second via region of the longitudinal stem electrode extends out of the second sub-backbone electrode until it meets.
  • the first sub-backbone electrode and the second sub-parent electrode coincide.
  • a fifth sub-pixel electrode is extended from one end of the lateral trunk electrode toward the peripheral frame, and the fifth sub-pixel electrode passes through a third pass corresponding to the corresponding region of the lateral trunk electrode.
  • a hole connects the pixel electrode to the switching unit.
  • the pixel unit of the present invention has a hollow cross-shaped annular structure by performing a corresponding hollowing treatment on the cross-shaped main electrode of the pixel electrode.
  • the corresponding area of the main electrode hollowed out forms the topography of the groove so that the liquid crystal has a certain orientation, where the liquid crystal does not interfere with each other due to different pouring directions, and irregular dark lines are generated; further, the pixel electrode is hollowed out.
  • the corresponding region of the main electrode of the glyph which the electric field strength is weakened, also causes the effect of the electric field on the liquid crystal to be weakened, so that the liquid crystal dumping conflict between the different sub-pixel electrodes divided by the main electrode is also weakened, thereby greatly reducing the Dark lines affect.
  • FIG. 1 is a schematic structural diagram of a pixel unit according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural diagram of a pixel electrode according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural diagram of a pixel unit according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural view of a pixel structure of the prior art.
  • the present invention is directed to the pixel structure of the prior art, and the present embodiment can solve the defect because the tilting direction of the liquid crystal in the corresponding region of the cross-shaped main electrode is opposite, thereby inevitably generating dark lines, thereby affecting the performance of the display device.
  • liquid crystal display panel and the pixel unit thereof according to the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
  • a schematic diagram of a structure of a pixel unit according to a first embodiment of the present invention includes: a peripheral frame 101 , the peripheral frame 101 surrounding a pixel electrode; and a trunk electrode 120 connected to the peripheral frame 101 .
  • the main electrode 120 has a cross shape, and the main electrode 120 includes a lateral main electrode 102 and a vertical main electrode 103 that are perpendicular to each other; the horizontal main electrode 102 and the vertical main electrode 103 divide the pixel electrode into four a region; a branch electrode, one end of the branch electrode is connected to the peripheral frame 101, and the other end is connected to the lateral trunk electrode 102 / the longitudinal stem electrode 103; in a region of the pixel electrode
  • the branch electrodes are parallel to each other and spaced apart from each other, and are connected to the lateral trunk electrode 102 / the longitudinal stem electrode 103 at a first predetermined angle, and the first predetermined angle is preferably between 10 degrees and 80 degrees.
  • the first dry electrode 104 is parallel to the fourth dry electrode 107
  • the second dry electrode 105 is parallel to the third dry electrode 106
  • the dry electrode 106 is at a second predetermined angle, and the second predetermined angle is preferably between 60 degrees and 120 degrees; wherein the lateral stem electrode 102 is provided with a first through hole 108, and the longitudinal stem electrode 103 is provided with a first
  • the second through hole 109 is connected to the second through hole 109, and the main electrode 120 is formed in a cross shape.
  • the pixel unit further includes a light shielding metal layer and a common electrode, the light shielding metal layer is provided with a light shielding electrode, and a lateral light shielding electrode (not shown) corresponds to the lateral trunk electrode 102, and the vertical light shielding electrode 110 corresponds to the
  • the longitudinal trunk electrode 103 is connected to the common electrode by the lateral light-shielding electrode and the longitudinal light-shielding electrode 110.
  • the projection of the lateral light-shielding electrode on the pixel electrode covers the first through hole 108, and the projection of the vertical light-shielding electrode 110 at the pixel electrode covers the second through hole 109.
  • the lateral light-shielding electrode is equal in width to the longitudinal light-shielding electrode 110.
  • the first through hole 108 extends from one end of the lateral trunk electrode 102 along the extending direction of the lateral trunk electrode 102 to the other end, and the second through hole 109 is formed by one end of the longitudinal trunk electrode 103.
  • the extending direction of the longitudinal trunk electrode 103 extends to the other end; the first through hole 108 and the second through hole 109 divide the pixel electrode into a first sub-pixel electrode, a second sub-pixel electrode, and a third sub-pixel An electrode and a fourth sub-pixel electrode.
  • a fifth sub-pixel electrode 111 is extended from the one end of the lateral trunk electrode 102 toward the peripheral frame 101, and the fifth sub-pixel electrode 111 passes through the third through hole corresponding to the corresponding region of the lateral trunk electrode 102.
  • the pixel electrode is connected to the switching unit 112.
  • the light shielding metal layer further includes a metal light shielding layer 113 having an area larger than an area of the fifth subpixel electrode 111, and the metal light shielding layer 113 is configured to cover the fifth subpixel electrode 111.
  • the peripheral frame 101 near the side of the switch unit 112.
  • Forming a groove at a corresponding position of the first through hole 108 and the second through hole 109 causes the liquid crystal to have a certain orientation, where the liquid crystal does not interfere with each other due to the direction of the tilting, thereby generating irregular darkness
  • the main electrode 120 of the pixel electrode has a hollow cross-ring structure, the electric field strength at the main electrode 120 is weakened, and the effect of the electric field on the liquid crystal is also weakened, and the different sub-pixels are
  • the liquid crystal tilting conflict of the stem electrode 120 is also attenuated, thereby reducing the effect of dark lines.
  • first through hole 108 and the second through hole 109 may also be disposed in a spaced apart form.
  • first through hole 108 is at least two along the lateral trunk electrode 102.
  • the extending directions are arranged side by side, or vertically spaced apart from the lateral trunk electrode 102, or arranged in parallel at multiple intervals; the second through holes 109 are distributed in the same manner as the first through holes 108, No longer.
  • FIG. 2 a schematic diagram of a structure of a pixel electrode according to a first embodiment of the present invention, a peripheral frame 201 enclosing the pixel electrode, and the pixel electrode includes a horizontal trunk electrode 202 and a vertical trunk electrode 204 that are perpendicular to each other.
  • the lateral trunk electrode 202 includes a first via 203
  • the vertical stem electrode 204 includes a second via 205
  • the first via 203 and the second via 205 divide the pixel electrode into a first a sub-pixel electrode 206, a second sub-pixel electrode 207, a third sub-pixel electrode 208, and a fourth sub-pixel electrode 209;
  • a center of a intersection of the lateral trunk electrode 202 and the longitudinal stem electrode 204 is a hollow structure
  • the one sub-pixel electrode 206, the second sub-pixel electrode 207, the third sub-pixel electrode 208, and the fourth sub-pixel electrode 209 are connected to each other by the peripheral frame 201.
  • a schematic diagram of a structure of a pixel unit according to a second embodiment of the present invention includes: a peripheral frame 301, the peripheral frame 301 surrounding a pixel electrode; and a trunk electrode 320 connected to the peripheral frame 301.
  • the main electrode 320 has a cross shape, and the main electrode 320 includes a transverse main conductor 302 and a vertical main electrode 303 which are perpendicular to each other; the horizontal main electrode 302 and the vertical main electrode 303 divide the pixel electrode into four regions.
  • the stem electrodes are parallel to each other and spaced apart from each other, and are connected to the lateral stem electrode 302 / the longitudinal stem electrode 303 at a third predetermined angle
  • the third predetermined angle is preferably between 10 degrees and 80 degrees; the first dry electrode 304 is parallel to the fourth dry electrode 307, and the second dry electrode 305 is parallel to the third dry electrode 306.
  • a dry electrode 304 and the third dry electrode 306 are at a second predetermined angle, and the second predetermined angle is preferably between 60 and 120 degrees.
  • the lateral trunk electrode 302 includes a first sub-backbone electrode 3021
  • the longitudinal trunk electrode 303 includes a second sub-backbone electrode 3031
  • the first sub-backbone electrode 3021 is the lateral trunk electrode 302 along the
  • the extending direction of the branch electrodes is formed and intersected in a region of the first via holes (108 in FIG. 1)
  • the second sub-backbone electrode 3031 is the extending direction of the longitudinal stem electrodes 303 along the branch electrodes
  • a second via hole (such as 109 in FIG.
  • the first sub-backbone electrode 3021 causes the lateral stem electrode 302 to form a first slit mirrored by the longitudinal stem electrode 303 308 and a second slit 309;
  • the second sub-back electrode 3031 forms the third main drain electrode 303 with a third slit 310 and a fourth slit 311 mirrored by the lateral main electrode 302;
  • the slit 308, the second slit 309, the third slit 310, and the fourth slit 311 are all spaced apart.
  • the intersection of the lateral trunk electrode 302 and the longitudinal trunk electrode 303, the first sub-backbone electrode 3021 and the second sub-backbone electrode 3031 overlap.
  • the slit 308, the second slit 309, the third slit 310, and the fourth slit 311 form a topography of the groove so that the liquid crystal has a certain orientation, where the liquid crystal does not
  • the tilting direction is different, and the mutual influence produces irregular dark lines; and the electric field strength at the corresponding position of the horizontal trunk electrode 302 and the longitudinal stem electrode 303 is weakened, which also causes the effect of the electric field on the liquid crystal to be weakened, and between different sub-pixels
  • the liquid crystal tilting conflict of the stem electrode 320 is also weakened, thereby reducing the effect of dark lines.
  • the first sub-backbone electrode 3021 and the second sub-trunk electrode 3031 may also extend along the extending direction of the branch electrode, such as a vertical extension intersection, or an arc extension intersection, to form a corresponding slit.
  • the topography of the trench may be formed, and the specific shape of the first sub-backbone electrode 3021 and the second sub-backbone electrode 3031 is not limited herein.
  • the present invention also provides a liquid crystal display panel comprising the pixel unit described above.
  • the pixel unit of the present invention has a hollow cross-shaped annular structure and a corresponding region of the main electrode hollowed out by performing a corresponding hollowing process on the cross-shaped main electrode of the pixel electrode.
  • the topography of the groove is formed so that the liquid crystal has a certain orientation, where the liquid crystal does not interfere with each other due to the different direction of the pouring, thereby generating irregular irregular lines; further, the corresponding area of the cross-shaped main electrode of the pixel electrode is hollowed out,
  • the weakening of the electric field strength here also weakens the effect of the electric field on the liquid crystal, so that the liquid crystal tilting conflict between the different sub-pixel electrodes divided by the main electrode is also weakened, thereby greatly reducing the influence of dark lines.

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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)
  • Liquid Crystal (AREA)
  • Spectroscopy & Molecular Physics (AREA)

Abstract

一种像素单元，包括：外围边框（101），包围像素电极；主干电极（120），与外围边框（101）连接，并包括呈十字形的横向主干电极（102）与纵向主干电极（103）；支干电极，与外围边框（101）以及主干电极（120）连接；横向主干电极（102）设置有第一通孔（108），纵向主干电极（103）设置有第二通孔（109），第一通孔（108）与第二通孔（109）相连，并使主干电极（120）呈十字形环状。

Description

一种液晶显示面板及其像素单元 技术领域
本发明涉及显示技术领域，尤其涉及一种液晶显示面板及其像素单元。
 背景技术
液晶显示技术中HVA(PSVA)模式是众多VA模式中的一种。HVA模式的像素结构不需要有凸起物，引起比PVA和MVA具有很大的优势，比如减少凸起物的制程，减少凸起物带来的地形影响，减少凸起物带来的颗粒影响等。
普通的HVA像素设计为了克服VA模式的视角问题，和VA其他模式一样，也会在一个像素区域内分成多个子像素区域（domain），一般为四个domain。如图4所示为现有技术HVA像素结构示意图，像素电极中间的十字形主干电极401，即为domain之间的分界线，也是产生暗纹的地方。Domain之间由于液晶的倾倒方向相反，不可避免的会产生暗纹。暗纹由液晶倾倒方向冲突导致，而液晶的倾倒还受地形的影响，所以暗纹的形貌可能不规则。
综上所述，现有技术的像素结构由于十字形主干电极相应区域的液晶的倾倒方向相反，从而不可避免的产生暗纹，进而影响显示器件的性能。
 技术问题
本发明提供一种液晶显示面板及其像素单元，能够降低像素电极的十字形主干电极处产生暗纹，进而提高显示器件的性能。
 技术解决方案
为解决上述问题，本发明提供的技术方案如下：
本发明提供一种像素单元，包括：
外围边框，所述外围边框包围像素电极；
主干电极，与所述外围边框连接，所述主干电极呈十字形，所述主干电极包括相互垂直的横向主干电极与纵向主干电极，其中，所述横向主干电极与所述纵向主干电极将所述像素电极划分为四个区域；
支干电极，所述支干电极的一端与所述外围边框连接，相对另一端与所述横向主干电极/所述纵向主干电极连接；
所述像素电极的一所述区域内，所述支干电极相互平行且相互间隔设置，并与所述横向主干电极/所述纵向主干电极呈第一预定角度连接；
第一支干电极与第四支干电极平行，第二支干电极与第三支干电极平行，所述第一支干电极与所述第三支干电极呈第二预定角度；
其中，所述横向主干电极设置有第一通孔，所述纵向主干电极设置有第二通孔，所述第一通孔与所述第二通孔相连，并使所述主干电极呈十字形环状；所述横向主干电极与所述纵向主干电极的交叉点中心为空心结构，所述第一子像素电极、所述第二子像素电极、所述第三子像素电极以及所述第四子像素电极通过所述外围边框进行互相连接。
根据本发明一优选实施例，所述像素单元还包括光遮蔽金属层和公共电极，所述光遮蔽金属层设置有遮光电极，横向遮光电极对应所述横向主干电极，纵向遮光电极对应所述纵向主干电极，所述横向遮光电极与所述纵向遮光电极均连接所述公共电极。
根据本发明一优选实施例，所述横向遮光电极在所述像素电极的投影遮盖所述第一通孔，所述纵向遮光电极在所述像素电极的投影遮盖所述第二通孔。
根据本发明一优选实施例，所述横向遮光电极与所述纵向遮光电极的宽度相等。
根据本发明一优选实施例，所述第一通孔由所述横向主干电极的一端沿所述横向主干电极的延伸方向延伸到另一端，所述第二通孔由所述纵向主干电极的一端沿所述纵向主干电极的延伸方向延伸到另一端；所述第一通孔与所述第二通孔将所述像素电极划分为第一子像素电极、第二子像素电极、第三子像素电极以及第四子像素电极。
根据本发明一优选实施例，沿所述分支电极的延伸方向在所述横向主干电极的所述第一通孔区域延伸出第一子主干电极直至交汇，沿所述分支电极的延伸方向在所述纵向主干电极的所述第二通孔区域延伸出第二子主干电极直至交汇。
根据本发明一优选实施例，所述横向主干电极与所述纵向主干电极的交叉处，所述第一子主干电极与所述第二子主干电极重合。
根据本发明一优选实施例，由所述横向主干电极的一端向所述外围边框外延伸出第五子像素电极，所述第五子像素电极对应所述横向主干电极的相应区域通过第三通孔将所述像素电极连接到开关单元。
本发明还提供一种液晶显示面板，所述液晶显示面板包括上述所述的像素单元。
本发明还提供一种像素单元，包括：
外围边框，所述外围边框包围像素电极；
主干电极，与所述外围边框连接，所述主干电极呈十字形，所述主干电极包括相互垂直的横向主干电极与纵向主干电极，其中，所述横向主干电极与所述纵向主干电极将所述像素电极划分为四个区域；
支干电极，所述支干电极的一端与所述外围边框连接，相对另一端与所述横向主干电极/所述纵向主干电极连接；
所述像素电极的一所述区域内，所述支干电极相互平行且相互间隔设置，并与所述横向主干电极/所述纵向主干电极呈第一预定角度连接；
第一支干电极与第四支干电极平行，第二支干电极与第三支干电极平行，所述第一支干电极与所述第三支干电极呈第二预定角度；
其中，所述横向主干电极设置有第一通孔，所述纵向主干电极设置有第二通孔，所述第一通孔与所述第二通孔相连，并使所述主干电极呈十字形环状。
根据本发明一优选实施例，所述像素单元还包括光遮蔽金属层和公共电极，所述光遮蔽金属层设置有遮光电极，横向遮光电极对应所述横向主干电极，纵向遮光电极对应所述纵向主干电极，所述横向遮光电极与所述纵向遮光电极均连接所述公共电极。
根据本发明一优选实施例，所述横向遮光电极在所述像素电极的投影遮盖所述第一通孔，所述纵向遮光电极在所述像素电极的投影遮盖所述第二通孔。
根据本发明一优选实施例，所述横向遮光电极与所述纵向遮光电极的宽度相等。
根据本发明一优选实施例，所述第一通孔由所述横向主干电极的一端沿所述横向主干电极的延伸方向延伸到另一端，所述第二通孔由所述纵向主干电极的一端沿所述纵向主干电极的延伸方向延伸到另一端；所述第一通孔与所述第二通孔将所述像素电极划分为第一子像素电极、第二子像素电极、第三子像素电极以及第四子像素电极。
根据本发明一优选实施例，沿所述分支电极的延伸方向在所述横向主干电极的所述第一通孔区域延伸出第一子主干电极直至交汇，沿所述分支电极的延伸方向在所述纵向主干电极的所述第二通孔区域延伸出第二子主干电极直至交汇。
根据本发明一优选实施例，所述横向主干电极与所述纵向主干电极的交叉处，所述第一子主干电极与所述第二子主干电极重合。
根据本发明一优选实施例，由所述横向主干电极的一端向所述外围边框外延伸出第五子像素电极，所述第五子像素电极对应所述横向主干电极的相应区域通过第三通孔将所述像素电极连接到开关单元。
 有益效果
本发明的有益效果为：相较于现有技术的像素单元，本发明的像素单元通过将像素电极的十字形主干电极做相应的挖空处理，使主干电极呈中空的十字形环状结构，主干电极挖空的相应区域形成了沟槽的地形使得液晶有一定的朝向，在此处液晶不会因为倾倒方向不同，而相互影响产生不规则暗纹；再者，挖空了像素电极的十字形主干电极的相应区域，此处的电场强度减弱，也会使得电场对液晶的作用减弱，从而主干电极划分的不同子像素电极之间在此处的液晶倾倒冲突也会减弱，进而大大降低了暗纹影响。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例一提供的像素单元结构示意图；
图2为本发明实施例一提供的像素电极结构示意图；
图3为本发明实施例二提供的像素单元结构示意图；
图4为现有技术的像素结构的结构示意图。
 本发明的最佳实施方式
本发明针对现有技术的像素结构，由于十字形主干电极相应区域的液晶的倾倒方向相反，从而不可避免的产生暗纹，进而影响显示器件的性能的技术问题，本实施例能够解决该缺陷。
下面结合附图详细介绍本发明具体实施例提供的液晶显示面板及其像素单元。
如图1所示，本发明具体实施例一提供的像素单元结构示意图，所述像素单元包括：外围边框101，所述外围边框101包围像素电极；主干电极120，与所述外围边框101连接，所述主干电极120呈十字形，所述主干电极120包括相互垂直的横向主干电极102与纵向主干电极103；所述横向主干电极102与所述纵向主干电极103将所述像素电极划分为四个区域；支干电极，所述支干电极的一端与所述外围边框101连接，相对另一端与所述横向主干电极102/所述纵向主干电极103连接；所述像素电极的一所述区域内，所述支干电极相互平行且相互间隔设置，并与所述横向主干电极102/所述纵向主干电极103呈第一预定角度连接，所述第一预定角度优选为10度到80度之间；第一支干电极104与第四支干电极107平行，第二支干电极105与第三支干电极106平行，所述第一支干电极104与所述第三支干电极106呈第二预定角度，所述第二预定角度优选为60度到120度之间；其中，所述横向主干电极102设置有第一通孔108，所述纵向主干电极103设置有第二通孔109，所述第一通孔108与所述第二通孔109相连，并使所述主干电极120呈十字形环状。
所述像素单元还包括光遮蔽金属层和公共电极，所述光遮蔽金属层设置有遮光电极，横向遮光电极（图中未标出）对应所述横向主干电极102，纵向遮光电极110对应所述纵向主干电极103，所述横向遮光电极与所述纵向遮光电极110均连接所述公共电极。所述横向遮光电极在所述像素电极的投影遮盖所述第一通孔108，所述纵向遮光电极110在所述像素电极的投影遮盖所述第二通孔109。所述横向遮光电极与所述纵向遮光电极110的宽度相等。
所述第一通孔108由所述横向主干电极102的一端沿所述横向主干电极102的延伸方向延伸到另一端，所述第二通孔109由所述纵向主干电极103的一端沿所述纵向主干电极103的延伸方向延伸到另一端；所述第一通孔108与所述第二通孔109将所述像素电极划分为第一子像素电极、第二子像素电极、第三子像素电极以及第四子像素电极。由所述横向主干电极102的一端向所述外围边框101外延伸出第五子像素电极111，所述第五子像素电极111对应所述横向主干电极102的相应区域通过第三通孔（未标出）将所述像素电极连接到开关单元112。所述光遮蔽金属层还包括金属遮光层113，所述金属遮光层113的面积大于所述第五子像素电极111的面积，所述金属遮光层113用于遮盖所述第五子像素电极111以及靠近所述开关单元112一侧的所述外围边框101。
在所述第一通孔108与所述第二通孔109的相应位置形成了沟槽的地形使得液晶有一定的朝向，在此处液晶不会因为倾倒方向不同，而相互影响产生不规则暗纹；而且因为所述像素电极的所述主干电极120为中空的十字环状结构，所述主干电极120处的电场强度减弱，也会使得电场对液晶的作用减弱，不同子像素间在所述主干电极120的液晶倾倒冲突也会减弱，从而降低暗纹影响。
本实施例中，所述第一通孔108与所述第二通孔109还可设置成间隔分布的形式，例如，所述第一通孔108至少为两个，沿所述横向主干电极102的延伸方向并排间隔设置，或垂直与所述横向主干电极102并列间隔设置，或呈多组并列间隔设置；所述第二通孔109与所述第一通孔108的分布方式一致，此处不再赘述。
如图2所示，为本发明实施例一提供的像素电极结构示意图，外围边框201围成所述像素电极，所述像素电极包括相互垂直呈十字形的横向主干电极202与纵向主干电极204，所述横向主干电极202包括第一通孔203，所述纵向主干电极204包括第二通孔205，所述第一通孔203与所述第二通孔205将所述像素电极划分为第一子像素电极206、第二子像素电极207、第三子像素电极208以及第四子像素电极209；所述横向主干电极202与所述纵向主干电极204的交叉点中心为空心结构，所述第一子像素电极206、所述第二子像素电极207、所述第三子像素电极208以及所述第四子像素电极209通过所述外围边框201进行互相连接。
如图3所示，本发明实施例二提供的像素单元结构示意图，所述像素单元包括：外围边框301，所述外围边框301包围像素电极；主干电极320，与所述外围边框301连接，所述主干电极320呈十字形，所述主干电极320包括相互垂直的横向主干电302与纵向主干电极303；所述横向主干电极302与所述纵向主干电极303将所述像素电极划分为四个区域；支干电极，在所述像素电极的一所述区域内，所述支干电极相互平行且相互间隔设置，并与所述横向主干电极302/所述纵向主干电极303呈第三预定角度连接，所述第三预定角度优选为10度到80度之间；第一支干电极304与第四支干电极307平行，第二支干电极305与第三支干电极306平行，所述第一支干电极304与所述第三支干电极306呈第二预定角度，所述第二预定角度优选为60度到120度之间。
其中，所述横向主干电极302包括有第一子主干电极3021，所述纵向主干电极303包括有第二子主干电极3031，所述第一子主干电极3021是所述横向主干电极302沿所述分支电极的延伸方向在第一通孔（如图1中的108）区域延伸出并交汇形成的，所述第二子主干电极3031是所述纵向主干电极303沿所述分支电极的延伸方向在第二通孔（如图1中的109）区域延伸出并交汇形成的，所述第一子主干电极3021使所述横向主干电极302形成以所述纵向主干电极303为镜像的第一狭缝308与第二狭缝309；所述第二子主干电极3031使所述纵向主干电极303形成以所述横向主干电极302为镜像的第三狭缝310与第四狭缝311；所述一狭缝308、所述第二狭缝309、所述第三狭缝310、所述第四狭缝311均呈间隔分布。所述横向主干电极302与所述纵向主干电极303的交叉处，所述第一子主干电极3021与所述第二子主干电极3031重合。
所述一狭缝308、所述第二狭缝309、所述第三狭缝310以及所述第四狭缝311形成了沟槽的地形使得液晶有一定的朝向，在此处液晶不会因为倾倒方向不同，而相互影响产生不规则暗纹；而且所述横向主干电极302与所述纵向主干电极303相应位置处的电场强度减弱，也会使得电场对液晶的作用减弱，不同子像素间在所述主干电极320的液晶倾倒冲突也会减弱，从而降低暗纹影响。
其中，所述第一子主干电极3021与所述第二子主干电极3031也可不沿所述分支电极的延伸方向进行延伸，比如垂直延伸交汇，或弧线延伸交汇等，以形成相应的狭缝，构成沟槽的地形便可，在此不对所述第一子主干电极3021与所述第二子主干电极3031的具体形状做限定。
本发明还提供一种液晶显示面板，所述液晶显示面板包括上述所述的像素单元。
相较于现有技术的像素单元，本发明的像素单元通过将像素电极的十字形主干电极做相应的挖空处理，使主干电极呈中空的十字形环状结构，主干电极挖空的相应区域形成了沟槽的地形使得液晶有一定的朝向，在此处液晶不会因为倾倒方向不同，而相互影响产生不规则暗纹；再者，挖空了像素电极的十字形主干电极的相应区域，此处的电场强度减弱，也会使得电场对液晶的作用减弱，从而主干电极划分的不同子像素电极之间在此处的液晶倾倒冲突也会减弱，进而大大降低了暗纹影响。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (17)

  1. 一种像素单元，其包括：
    外围边框，所述外围边框包围像素电极；
    主干电极，与所述外围边框连接，所述主干电极呈十字形，所述主干电极包括相互垂直的横向主干电极与纵向主干电极，其中，所述横向主干电极与所述纵向主干电极将所述像素电极划分为四个区域；
    支干电极，所述支干电极的一端与所述外围边框连接，相对另一端与所述横向主干电极/所述纵向主干电极连接；
    所述像素电极的一所述区域内，所述支干电极相互平行且相互间隔设置，并与所述横向主干电极/所述纵向主干电极呈第一预定角度连接；
    第一支干电极与第四支干电极平行，第二支干电极与第三支干电极平行，所述第一支干电极与所述第三支干电极呈第二预定角度；
    其中，所述横向主干电极设置有第一通孔，所述纵向主干电极设置有第二通孔，所述第一通孔与所述第二通孔相连，并使所述主干电极呈十字形环状；所述横向主干电极与所述纵向主干电极的交叉点中心为空心结构，所述第一子像素电极、所述第二子像素电极、所述第三子像素电极以及所述第四子像素电极通过所述外围边框进行互相连接。
  2. 根据权利要求1所述的像素单元，其特征在于，所述像素单元还包括光遮蔽金属层和公共电极，所述光遮蔽金属层设置有遮光电极，横向遮光电极对应所述横向主干电极，纵向遮光电极对应所述纵向主干电极，所述横向遮光电极与所述纵向遮光电极均连接所述公共电极。
  3. 根据权利要求2所述的像素单元，其中，所述横向遮光电极在所述像素电极的投影遮盖所述第一通孔，所述纵向遮光电极在所述像素电极的投影遮盖所述第二通孔。
  4. 根据权利要求2所述的像素单元，其中，所述横向遮光电极与所述纵向遮光电极的宽度相等。
  5. 根据权利要求2所述的像素单元，其中，所述第一通孔由所述横向主干电极的一端沿所述横向主干电极的延伸方向延伸到另一端，所述第二通孔由所述纵向主干电极的一端沿所述纵向主干电极的延伸方向延伸到另一端；所述第一通孔与所述第二通孔将所述像素电极划分为第一子像素电极、第二子像素电极、第三子像素电极以及第四子像素电极。
  6. 根据权利要求5所述的像素单元，其中，沿所述分支电极的延伸方向在所述横向主干电极的所述第一通孔区域延伸出第一子主干电极直至交汇，沿所述分支电极的延伸方向在所述纵向主干电极的所述第二通孔区域延伸出第二子主干电极直至交汇。
  7. 根据权利要求6所述的像素单元，其中，所述横向主干电极与所述纵向主干电极的交叉处，所述第一子主干电极与所述第二子主干电极重合。
  8. 根据权利要求2所述的像素单元，其中，由所述横向主干电极的一端向所述外围边框外延伸出第五子像素电极，所述第五子像素电极对应所述横向主干电极的相应区域通过第三通孔将所述像素电极连接到开关单元。
  9. 一种液晶显示面板，其包括如权利要求1所述的像素单元。
  10. 一种像素单元，其包括：
    外围边框，所述外围边框包围像素电极；
    主干电极，与所述外围边框连接，所述主干电极呈十字形，所述主干电极包括相互垂直的横向主干电极与纵向主干电极，其中，所述横向主干电极与所述纵向主干电极将所述像素电极划分为四个区域；
    支干电极，所述支干电极的一端与所述外围边框连接，相对另一端与所述横向主干电极/所述纵向主干电极连接；
    所述像素电极的一所述区域内，所述支干电极相互平行且相互间隔设置，并与所述横向主干电极/所述纵向主干电极呈第一预定角度连接；
    第一支干电极与第四支干电极平行，第二支干电极与第三支干电极平行，所述第一支干电极与所述第三支干电极呈第二预定角度；
    其中，所述横向主干电极设置有第一通孔，所述纵向主干电极设置有第二通孔，所述第一通孔与所述第二通孔相连，并使所述主干电极呈十字形环状。
  11. 根据权利要求10所述的像素单元，其特征在于，所述像素单元还包括光遮蔽金属层和公共电极，所述光遮蔽金属层设置有遮光电极，横向遮光电极对应所述横向主干电极，纵向遮光电极对应所述纵向主干电极，所述横向遮光电极与所述纵向遮光电极均连接所述公共电极。
  12. 根据权利要求11所述的像素单元，其中，所述横向遮光电极在所述像素电极的投影遮盖所述第一通孔，所述纵向遮光电极在所述像素电极的投影遮盖所述第二通孔。
  13. 根据权利要求11所述的像素单元，其中，所述横向遮光电极与所述纵向遮光电极的宽度相等。
  14. 根据权利要求11所述的像素单元，其中，所述第一通孔由所述横向主干电极的一端沿所述横向主干电极的延伸方向延伸到另一端，所述第二通孔由所述纵向主干电极的一端沿所述纵向主干电极的延伸方向延伸到另一端；所述第一通孔与所述第二通孔将所述像素电极划分为第一子像素电极、第二子像素电极、第三子像素电极以及第四子像素电极。
  15. 根据权利要求14所述的像素单元，其中，沿所述分支电极的延伸方向在所述横向主干电极的所述第一通孔区域延伸出第一子主干电极直至交汇，沿所述分支电极的延伸方向在所述纵向主干电极的所述第二通孔区域延伸出第二子主干电极直至交汇。
  16. 根据权利要求15所述的像素单元，其中，所述横向主干电极与所述纵向主干电极的交叉处，所述第一子主干电极与所述第二子主干电极重合。
  17. 根据权利要求11所述的像素单元，其中，由所述横向主干电极的一端向所述外围边框外延伸出第五子像素电极，所述第五子像素电极对应所述横向主干电极的相应区域通过第三通孔将所述像素电极连接到开关单元。
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