WO2017035912A1 - Hva型液晶显示面板 - Google Patents

Hva型液晶显示面板 Download PDF

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Publication number
WO2017035912A1
WO2017035912A1 PCT/CN2015/091726 CN2015091726W WO2017035912A1 WO 2017035912 A1 WO2017035912 A1 WO 2017035912A1 CN 2015091726 W CN2015091726 W CN 2015091726W WO 2017035912 A1 WO2017035912 A1 WO 2017035912A1
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Prior art keywords
substrate
sub
pixel
liquid crystal
electrode layer
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PCT/CN2015/091726
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English (en)
French (fr)
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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 US14/888,441 priority Critical patent/US10126605B2/en
Publication of WO2017035912A1 publication Critical patent/WO2017035912A1/zh

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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
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    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
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    • 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
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1393—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC 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
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    • G02F1/133302—Rigid substrates, e.g. inorganic substrates
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    • 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
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    • G02F1/134318—Electrodes characterised by their geometrical arrangement having a patterned common electrode
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    • 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
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Definitions

  • the present invention relates to the field of display technologies, and in particular, to an HVA type liquid crystal display panel.
  • TFT-LCD Active Thin Film Transistor-LCD
  • CF color filter substrate
  • TFT thin film transistor substrate
  • LC liquid crystal
  • Sealant Sealant
  • the TFT-LCD display panel on the mainstream market can be divided into three types, namely Twisted Nematic (TN) or Super Twisted Nematic (STN) type, and plane conversion (In -Plane Switching, IPS) type, and Vertical Alignment (VA) type.
  • 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) mode is an important branch of the VA mode.
  • the HVA liquid crystal display panel operates, the vertical electric field formed by the pixel electrode on the array substrate side and the common electrode on the color filter substrate side controls the rotation of the liquid crystal molecules of the liquid crystal layer.
  • a black matrix is disposed on a side of the CF substrate facing the TFT substrate in the liquid crystal display panel.
  • a liquid crystal display panel includes an upper substrate 100, a lower substrate 200, and the upper substrate 100 and the lower substrate 200.
  • the upper substrate 100 includes a first substrate 110, a black matrix 120 disposed on the first substrate 110, a color filter layer, and a common electrode layer 140, wherein the color filter layer includes a red color block The green substrate block 132 and the blue color block;
  • the lower substrate includes a second substrate 210, gate scan lines and data lines 220 disposed on the second substrate 210, a passivation layer 230, and a passivation layer.
  • a pixel electrode layer on 230 wherein the gate scan line and the data line 220 enclose a plurality of sub-pixel regions, the pixel electrode layer having one pixel electrode 240 corresponding to each sub-pixel region, and the pixel electrode 240 in each sub-pixel Divided into a plurality of regions, such as a m-shaped pixel electrode, and the common electrode layer 140 is a continuous uninterrupted planar public electric
  • the red color block 131, the green color block 132, and the blue color block are respectively disposed corresponding to the sub-pixel regions.
  • the liquid crystal panel does not include a black matrix.
  • the potentials of the pixel electrode 240 and the common electrode 140 are the same, so that light leakage does not occur in the sub-pixel, but the potential and the common on the data line 220 In the case where the potentials of the electrodes 140 are different, it is possible to form an electric field, thereby driving the liquid crystal to deflect, resulting in light leakage; as shown in FIG.
  • the liquid crystal is deflected under the driving of the electric field formed by the data line 220 and the common electrode 140, thereby This causes the light leakage at the edge of the sub-pixel area.
  • the liquid crystal panel does not include a black matrix, and the color shift is liable to occur.
  • the CF substrate 100 and the TFT substrate 200 are misaligned, and the pixel The electrode 240 originally drives the liquid crystal in the green sub-pixel, so that the picture is green, but due to the alignment deviation, the electric field of the pixel electrode 240 may affect the liquid crystal at the edge of the red sub-pixel, causing a little red color in the green picture, and a color shift occurs. .
  • the same situation occurs above at the gate scan line of the liquid crystal panel.
  • An object of the present invention is to provide an HVA liquid crystal display panel.
  • the common electrode layer is provided with a hollow portion corresponding to the gate scan line and the data line, which can prevent the light leakage and color shift phenomenon at the edge of the sub-pixel region, thereby replacing black.
  • the matrix achieves a shading effect.
  • the present invention provides an HVA type liquid crystal display panel, comprising an upper substrate, a lower substrate, and a liquid crystal layer disposed between the upper substrate and the lower substrate;
  • the upper substrate includes a first substrate, and a common electrode layer disposed on a side of the first substrate opposite to the lower substrate;
  • the lower substrate includes a second substrate, a plurality of gate scan lines disposed on the second substrate, and a plurality of data lines;
  • the plurality of gate scan lines and the plurality of data lines are vertically and horizontally staggered to surround a plurality of sub-pixel regions; the plurality of gate scan lines and the plurality of data lines are located at edges of the plurality of sub-pixel regions;
  • a hollow portion is disposed on the common electrode layer corresponding to the gate scan line and the data line, and an electric field is generated in a region between the hollow portion and the gate scan line and the data line, thereby avoiding the region
  • the liquid crystal is driven to cause leakage of light and color shift in the edge of the sub-pixel region, thereby replacing the black matrix to achieve the shading effect.
  • the lower substrate further includes a passivation layer disposed on the second substrate and pixels disposed on the passivation layer And an electrode layer, wherein the pixel electrode layer has one pixel electrode corresponding to each sub-pixel region; the sub-pixel region includes a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region.
  • the upper substrate further includes a color filter layer disposed between the first substrate and the common electrode layer, wherein the color filter layer is respectively disposed corresponding to the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region There are red color block, green block, and blue block.
  • the lower substrate further includes a color filter layer disposed on the passivation layer, wherein the color filter layer is respectively provided with a red color block corresponding to the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region. , green color block, and blue color block.
  • a projection of the hollow portion on the common electrode layer on the lower substrate completely covers the data line.
  • a projection of the hollow portion on the common electrode layer on the lower substrate completely covers the gate scan line.
  • the material of the common electrode layer and the pixel electrode layer is ITO.
  • the hollow portion of the common electrode layer is formed by a yellow light process through a photomask.
  • the pixel electrode layer is a patterned electrode layer, and the pixel electrode is divided into a plurality of domains in each sub-pixel region.
  • the first substrate and the second substrate are both glass substrates.
  • the present invention also provides an HVA type liquid crystal display panel, comprising an upper substrate, a lower substrate, and a liquid crystal layer disposed between the upper substrate and the lower substrate;
  • the upper substrate includes a first substrate, and a common electrode layer disposed on a side of the first substrate opposite to the lower substrate;
  • the lower substrate includes a second substrate, a plurality of gate scan lines disposed on the second substrate, and a plurality of data lines;
  • the plurality of gate scan lines and the plurality of data lines are vertically and horizontally staggered to surround a plurality of sub-pixel regions; the plurality of gate scan lines and the plurality of data lines are located at edges of the plurality of sub-pixel regions;
  • a hollow portion is disposed on the common electrode layer corresponding to the gate scan line and the data line, and an electric field is generated in a region between the hollow portion and the gate scan line and the data line, thereby avoiding the region
  • the liquid crystal is driven to cause leakage of light and color shift in the edge of the sub-pixel region, thereby replacing the black matrix to achieve the shading effect;
  • the lower substrate further includes a passivation layer disposed on the second substrate, and a pixel electrode layer disposed on the passivation layer, the pixel electrode layer having one pixel electrode corresponding to each sub-pixel region; the sub-pixel The area includes a red sub-pixel area, a green sub-pixel area, and a blue sub-pixel area;
  • the invention has the beneficial effects that the HVA liquid crystal display panel of the invention has a corresponding scanning line on the common electrode layer on the upper substrate and a hollow portion above the data line, so that there is no public above the data line and the gate scanning line.
  • the electrode is opposite to the edge region of the sub-pixel region, and the electric field at the edge of the sub-pixel region is prevented from being driven by the electric field to rotate, thereby effectively preventing the light leakage and color shift phenomenon at the edge of the sub-pixel region, thereby realizing the shading instead of the black matrix. effect.
  • FIG. 1 is a schematic cross-sectional structural view of a conventional liquid crystal display panel at a data line
  • FIG. 2 is a schematic cross-sectional structural view of another conventional liquid crystal display panel at a data line
  • FIG. 3 is a schematic view showing a rotation state of a liquid crystal above a data line in the liquid crystal display panel of FIG. 2 under an electric field;
  • FIG. 4 is a cross-sectional structural view of the liquid crystal display panel of FIG. 2 at a data line when the upper and lower substrates are offset from each other;
  • FIG. 5 is a cross-sectional structural view of a HVA liquid crystal display panel of the present invention at a data line;
  • FIG. 6 is a schematic cross-sectional structural view of a HVA liquid crystal display panel with an upper and lower substrate offset at a data line;
  • Fig. 7 is a view showing the rotation state of liquid crystal above the data line in the HVA liquid crystal display panel of the present invention under an electric field.
  • the present invention provides an HVA type liquid crystal display panel, comprising an upper substrate 1, a lower substrate 2, and a liquid crystal layer 3 disposed between the upper substrate 1 and the lower substrate 2;
  • the upper substrate 1 includes a first substrate 11 and a first substrate 11 and a lower substrate 2 Side common electrode layer 12;
  • the lower substrate 2 includes a second substrate 21, a plurality of gate scan lines disposed on the second substrate 21, and a plurality of data lines 22;
  • the plurality of gate scan lines and the plurality of data lines 22 are vertically and horizontally staggered to define a plurality of sub-pixel regions; the plurality of gate scan lines and the plurality of data lines 22 are located at edges of the plurality of sub-pixel regions.
  • a corresponding hollow portion 121 is disposed above the corresponding gate scan line and the data line 22 on the common electrode layer 12 such that no common electrode is opposite to the data line and the gate scan line, that is, the hollow portion 121 and the gate scan There is no electric field generated in the region between the line and the data line 22, thereby avoiding the occurrence of light leakage and color shift due to the driving of the liquid crystal in the region, and further realizing the shading effect instead of the black matrix.
  • the first substrate 11 and the second substrate 22 are both glass substrates.
  • the material of the common electrode layer 12 is ITO; the hollow portion 121 of the common electrode layer 12 is formed by a yellow light process through a photomask.
  • the projection of the hollow portion 121 on the common electrode layer 12 on the lower substrate 2 completely covers the data line 22 and the gate scan line to ensure the data line 22 and the gate scan line. There is no electric field generated in the region between the common electrode layer 12.
  • the lower substrate 2 further includes a passivation layer 23 disposed on the second substrate 21 and a pixel electrode layer disposed on the passivation layer 23, wherein the pixel electrode layer has one pixel electrode corresponding to each sub-pixel region.
  • the sub-pixel region includes a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region; the pixel electrode layer is a patterned electrode layer, and the pixel electrode 24 is divided into Multiple areas.
  • the material of the pixel electrode layer is ITO.
  • the upper substrate 1 further includes a color filter layer disposed between the first substrate 11 and the common electrode layer 12, wherein the color filter layer corresponds to the red sub-pixel region, the green sub-pixel region, and the blue
  • the color sub-pixel regions are respectively provided with a red color block 141, a green color block 142, and a blue color block;
  • the color filter layer is disposed on the lower substrate 2, that is, the liquid crystal panel may also be a COA type liquid crystal display panel, and the lower substrate 2 includes a color filter layer disposed on the passivation layer 23, and the color filter
  • the light layer corresponding to the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region includes a red color block, a green color block, and a blue color block.
  • the common electrode layer 12 has a hollow portion 121 corresponding to the gate scan line and the data line 22, which is equivalent to a common electrode in the existing liquid crystal panel directly under the black matrix.
  • the portion is etched away, so that an electric field cannot be formed in the region, where the liquid crystal Unable to be driven by the electric field, the polarized light in this area will never pass through the liquid crystal in this area, thus playing the same role as the black matrix.
  • FIG. 6 when the alignment of the upper and lower substrates is deviated, when the pixel electrode 24 belonging to the green sub-pixel region is shifted to the region where the red color block and the green color block are transferred, there is no corresponding common electrode above. An electric field is formed therewith so that the liquid crystal in the red sub-pixel region is not affected, so that no color shift occurs.
  • Fig. 7 is a view showing a state of rotation of a liquid crystal in a liquid crystal display panel of the present invention at a high voltage.
  • the liquid crystal in the edge portion of the sub-pixel region in the liquid crystal panel of the present invention can be substantially in a vertical state without being affected by an electric field.
  • the common electrode layer on the upper substrate corresponds to the gate scan line, and the upper portion of the data line is provided with a hollow portion, so that there is no common electrode above the data line and the gate scan line.
  • the edge of the sub-pixel region cannot form an electric field, and the liquid crystal at the edge of the sub-pixel region is prevented from being driven by the electric field to rotate, thereby effectively preventing the occurrence of light leakage and color shift in the edge of the sub-pixel region, thereby realizing the shading effect instead of the black matrix.

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Abstract

一种HVA型液晶显示面板，包括上基板(1)、下基板(2)、及设于上基板(1)与下基板(2)之间的液晶层(3)；所述上基板(1)包括第一基板(11)、及设于第一基板(11)上面对下基板(2)一侧的公共电极层(12)；所述下基板(2)包括第二基板(21)、设于第二基板(21)上的数条栅极扫描线、及数条数据线(22)；所述数条栅极扫描线、及数条数据线(22)纵横交错围出数个子像素区域；所述公共电极层(12)上对应栅极扫描线、及数据线(22)的上方设有镂空部(121)，以防止子像素区域边缘漏光及色偏现象的发生，从而代替黑色矩阵实现遮光作用。

Description

HVA型液晶显示面板 技术领域
本发明涉及显示技术领域，尤其涉及一种HVA型液晶显示面板。
背景技术
主动式薄膜晶体管液晶显示器(Thin Film Transistor-LCD，TFT-LCD)近年来得到了飞速的发展和广泛的应用。现有市场上的液晶显示装置大部分为背光型液晶显示装置，其包括液晶显示面板及背光模组(backlight module)。通常液晶显示面板由彩膜基板(CF，Color Filter)、薄膜晶体管基板(TFT，Thin Film Transistor)、夹于彩膜基板与薄膜晶体管基板之间的液晶(LC，Liquid Crystal)及密封框胶(Sealant)组成；其工作原理是通过在两片玻璃基板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。
就目前主流市场上的TFT-LCD显示面板而言，可分为三种类型，分别是扭曲向列(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。而高垂直排列(High Vertical Alignment，HVA)模式是VA模式中一个重要的分支。HVA型液晶显示面板工作时是由阵列基板侧的像素电极和彩膜基板侧的公共电极形成的垂直电场来控制液晶层的液晶分子的旋转。
通常液晶显示面板中CF基板面向TFT基板一侧设有黑色矩阵，如图1所示，现有一种液晶显示面板，包括上基板100、下基板200、及设于上基板100与下基板200之间的液晶层300，所述上基板100包括第一基板110、设于第一基板110上的黑色矩阵120、彩色滤光层、及公共电极层140，其中彩色滤光层包括红色色阻块131、绿色色阻块132、及蓝色色阻块；所述下基板包括第二基板210、设于第二基板210上的栅极扫描线及数据线220、钝化层230、及钝化层230上的像素电极层，其中，所述栅极扫描线及数据线220围成数个子像素区域，所述像素电极层对应每个子像素区域具有一个像素电极240，像素电极240在每个子像素内被划分为多个区域，如米字型像素电极，而所述公共电极层140为连续不间断的平面型公共电 极；所述红色色阻块131、绿色色阻块132、及蓝色色阻块分别对应子像素区域设置。
液晶显示技术在发展，无论是出于节约成本的考虑还是曲面设计的考虑，把CF基板侧的黑色矩阵去掉，都是技术发展的一个趋势。但是如果没有黑色矩阵就会出现显示品质的问题。如图2所示，液晶面板不包括黑色矩阵，在暗态条件下，像素电极240和公共电极140的电位相同，所以在子像素内不会出现漏光，但是在数据线220上的电位和公共电极140的电位不同的情况下，就有可能形成电场，从而驱动液晶偏转，导致漏光；如图3所示，液晶在300在数据线220和公共电极140所形成电场的驱动下发生偏转，从而导致子像素区域边缘漏光现象的发生。另外，在TFT基板与CF基板对位出现偏差的情况下，液晶面板不包括黑色矩阵，则容易出现色偏的问题，如图4所示，CF基板100与TFT基板200对位发生偏差，像素电极240本来是驱动绿色子像素中的液晶，使得画面为绿色，但是由于对位偏差，像素电极240的电场有可能影响到红色子像素边缘的液晶，导致绿色画面中混入一点红色，出现色偏。同理，在液晶面板的栅极扫描线处也会出现以上相同的情况。
发明内容
本发明的目的在于提供一种HVA型液晶显示面板，公共电极层对应栅极扫描线、及数据线的上方设有镂空部，能够防止子像素区域边缘漏光及色偏现象的发生，从而代替黑色矩阵实现遮光作用。
为实现上述目的，本发明提供一种HVA型液晶显示面板，包括上基板、下基板、及设于上基板与下基板之间的液晶层；
所述上基板包括第一基板、及设于第一基板上面对下基板一侧的公共电极层；
所述下基板包括第二基板、设于第二基板上的数条栅极扫描线、及数条数据线；
所述数条栅极扫描线、及数条数据线纵横交错围出数个子像素区域；所述数条栅极扫描线、及数条数据线位于所述数个子像素区域的边缘处；
所述公共电极层上对应所述栅极扫描线、及数据线的上方设有镂空部，所述镂空部与栅极扫描线、及数据线之间的区域无电场产生，从而避免因该区域的液晶被驱动而导致的子像素区域边缘漏光及色偏现象的发生，进而代替黑色矩阵实现遮光作用。
所述下基板还包括设于第二基板上的钝化层、及设于钝化层上的像素 电极层，所述像素电极层对应每个子像素区域具有一个像素电极；所述子像素区域包括红色子像素区域、绿色子像素区域、及蓝色子像素区域。
所述上基板还包括设于第一基板及公共电极层之间的彩色滤光层，所述彩色滤光层对应所述红色子像素区域、绿色子像素区域、及蓝色子像素区域分别设有红色色阻块、绿色色阻块、及蓝色色阻块。
所述下基板还包括设于钝化层上的彩色滤光层，所述彩色滤光层对应所述红色子像素区域、绿色子像素区域、及蓝色子像素区域分别设有红色色阻块、绿色色阻块、及蓝色色阻块。
所述公共电极层上的镂空部在所述下基板上的投影完全覆盖所述数据线。
所述公共电极层上的镂空部在所述下基板上的投影完全覆盖所述栅极扫描线。
所述公共电极层、及像素电极层的材料为ITO。
所述公共电极层的镂空部通过光罩经由黄光制程形成。
所述像素电极层为图案化电极层，在每个子像素区域内所述像素电极被划分为多个域。
所述第一基板、第二基板均为玻璃基板。
本发明还提供一种HVA型液晶显示面板，包括上基板、下基板、及设于上基板与下基板之间的液晶层；
所述上基板包括第一基板、及设于第一基板上面对下基板一侧的公共电极层；
所述下基板包括第二基板、设于第二基板上的数条栅极扫描线、及数条数据线；
所述数条栅极扫描线、及数条数据线纵横交错围出数个子像素区域；所述数条栅极扫描线、及数条数据线位于所述数个子像素区域的边缘处；
所述公共电极层上对应所述栅极扫描线、及数据线的上方设有镂空部，所述镂空部与栅极扫描线、及数据线之间的区域无电场产生，从而避免因该区域的液晶被驱动而导致的子像素区域边缘漏光及色偏现象的发生，进而代替黑色矩阵实现遮光作用；
其中，所述下基板还包括设于第二基板上的钝化层、及设于钝化层上的像素电极层，所述像素电极层对应每个子像素区域具有一个像素电极；所述子像素区域包括红色子像素区域、绿色子像素区域、及蓝色子像素区域；
其中，所述公共电极层上的镂空部在所述下基板上的投影完全覆盖所 述数据线；
其中，所述公共电极层上的镂空部在所述下基板上的投影完全覆盖所述栅极扫描线。
本发明的有益效果：本发明的HVA型液晶显示面板，上基板上的公共电极层上对应栅极扫描线、及数据线的上方设有镂空部，使得数据线及栅极扫描线上方无公共电极与其相对，子像素区域的边缘区无法形成电场，避免了位于子像素区域边缘的液晶受电场驱动而转动，有效防止了子像素区域边缘漏光及色偏现象的发生，从而代替黑色矩阵实现遮光作用。
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。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其他有益效果显而易见。
附图中，
图1为现有一种液晶显示面板在数据线处的剖面结构示意图；
图2为现有另一种液晶显示面板在数据线处的剖面结构示意图；
图3为图2的液晶显示面板内数据线上方的液晶在电场下的转动形态示意图；
图4为图2的液晶显示面板上下基板对位偏移时在数据线处的剖面结构示意图；
图5为本发明的HVA型液晶显示面板在数据线处的剖面结构示意图；
图6为本发明的HVA型液晶显示面板上下基板对位偏移时在数据线处的剖面结构示意图；
图7为本发明的HVA型液晶显示面板内数据线上方的液晶在电场下的转动形态示意图。
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5至图7，本发明提供一种HVA型液晶显示面板，包括上基板1、下基板2、及设于上基板1与下基板2之间的液晶层3；
所述上基板1包括第一基板11、及设于第一基板11上面对下基板2一 侧的公共电极层12；
所述下基板2包括第二基板21、设于第二基板21上的数条栅极扫描线、及数条数据线22；
所述数条栅极扫描线、及数条数据线22纵横交错围出数个子像素区域；所述数条栅极扫描线、及数条数据线22位于所述数个子像素区域的边缘处。
所述公共电极层12上对应栅极扫描线、及数据线22的上方设有镂空部121，使得数据线及栅极扫描线上方无公共电极与其相对，即所述镂空部121与栅极扫描线、及数据线22之间的区域无电场产生，从而避免因该区域的液晶被驱动而导致的漏光及色偏现象的发生，进而代替黑色矩阵实现遮光作用。
具体的，所述第一基板11、第二基板22均为玻璃基板。
具体的，所述公共电极层12的材料为ITO；所述公共电极层12的镂空部121通过光罩经由黄光制程形成。
具体的，所述公共电极层12上的镂空部121在所述下基板2上的投影完全覆盖所述数据线22、及栅极扫描线，以保证所述数据线22、及栅极扫描线与公共电极层12之间的区域无电场产生。
具体的，所述下基板2还包括设于第二基板21上的钝化层23、及设于钝化层23上的像素电极层，所述像素电极层对应每个子像素区域具有一个像素电极24；所述子像素区域包括红色子像素区域、绿色子像素区域、及蓝色子像素区域；所述像素电极层为图案化电极层，在每个子像素区域内所述像素电极24被划分为多个区域。具体的，所述像素电极层的材料为ITO。
具体的，所述上基板1还包括设于第一基板11及公共电极层12之间的彩色滤光层，所述彩色滤光层对应所述红色子像素区域、绿色子像素区域、及蓝色子像素区域分别设有红色色阻块141、绿色色阻块142、及蓝色色阻块；
或者，彩色滤光层设于下基板2上，即该液晶面板也可以为COA型液晶显示面板，则所述下基板2包括设于钝化层23上的彩色滤光层，所述彩色滤光层对应所述红色子像素区域、绿色子像素区域、及蓝色子像素区域包括红色色阻块、绿色色阻块、及蓝色色阻块。
如图5所示，本发明中，公共电极层12上对应栅极扫描线、及数据线22的上方设有镂空部121，即相当于将现有液晶面板中位于黑色矩阵正下方的公共电极的部分刻蚀掉，从而使得该区域内无法形成电场，该处液晶 无法受电场驱动，那么该区域的偏振光就永远无法透过这个区域的液晶，从而起到和黑色矩阵相同的作用。另外如图6所示，在上下基板对位产生偏差时，属于绿色子像素区域的像素电极24偏移至红色色阻块和绿色色阻块交接的区域时，其上方也无相应的公共电极与之形成电场，从而不会影响红色子像素区域的液晶，因此不会产生色偏。
图7是本发明的液晶显示面板内的液晶在高电压下的液晶转动形态示意图。和现有的液晶面板结构相比，本发明的液晶面板内处于子像素区域边缘部分的液晶基本上可以不受电场的作用，而处于垂直的状态。
综上所述，本发明的HVA型液晶显示面板，上基板上的公共电极层对应栅极扫描线、及数据线的上方设有镂空部，使得数据线及栅极扫描线上方无公共电极与其相对，子像素区域的边缘无法形成电场，避免了子像素区域边缘的液晶受电场驱动而转动，有效防止了子像素区域边缘漏光及色偏现象的发生，从而代替黑色矩阵实现遮光作用。
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后附的权利要求的保护范围。

Claims (17)

  1. 一种HVA型液晶显示面板，包括上基板、下基板、及设于上基板与下基板之间的液晶层；
    所述上基板包括第一基板、及设于第一基板上面对下基板一侧的公共电极层；
    所述下基板包括第二基板、设于第二基板上的数条栅极扫描线、及数条数据线；
    所述数条栅极扫描线、及数条数据线纵横交错围出数个子像素区域；所述数条栅极扫描线、及数条数据线位于所述数个子像素区域的边缘处；
    所述公共电极层上对应所述栅极扫描线、及数据线的上方设有镂空部，所述镂空部与栅极扫描线、及数据线之间的区域无电场产生，从而避免因该区域的液晶被驱动而导致的子像素区域边缘漏光及色偏现象的发生，进而代替黑色矩阵实现遮光作用。
  2. 如权利要求1所述的HVA型液晶显示面板，其中，所述下基板还包括设于第二基板上的钝化层、及设于钝化层上的像素电极层，所述像素电极层对应每个子像素区域具有一个像素电极；所述子像素区域包括红色子像素区域、绿色子像素区域、及蓝色子像素区域。
  3. 如权利要求2所述的HVA型液晶显示面板，其中，所述上基板还包括设于第一基板及公共电极层之间的彩色滤光层，所述彩色滤光层对应所述红色子像素区域、绿色子像素区域、及蓝色子像素区域分别设有红色色阻块、绿色色阻块、及蓝色色阻块。
  4. 如权利要求2所述的HVA型液晶显示面板，其中，所述下基板还包括设于钝化层上的彩色滤光层，所述彩色滤光层对应所述红色子像素区域、绿色子像素区域、及蓝色子像素区域分别设有红色色阻块、绿色色阻块、及蓝色色阻块。
  5. 如权利要求1所述的HVA型液晶显示面板，其中，所述公共电极层上的镂空部在所述下基板上的投影完全覆盖所述数据线。
  6. 如权利要求1所述的HVA型液晶显示面板，其中，所述公共电极层上的镂空部在所述下基板上的投影完全覆盖所述栅极扫描线。
  7. 如权利要求2所述的HVA型液晶显示面板，其中，所述公共电极层、及像素电极层的材料为ITO。
  8. 如权利要求1所述的HVA型液晶显示面板，其中，所述公共电极 层的镂空部通过光罩经由黄光制程形成。
  9. 如权利要求1所述的HVA型液晶显示面板，其中，所述像素电极层为图案化电极层，在每个子像素区域内所述像素电极被划分为多个域。
  10. 如权利要求1所述的HVA型液晶显示面板，其中，所述第一基板、第二基板均为玻璃基板。
  11. 一种HVA型液晶显示面板，包括上基板、下基板、及设于上基板与下基板之间的液晶层；
    所述上基板包括第一基板、及设于第一基板上面对下基板一侧的公共电极层；
    所述下基板包括第二基板、设于第二基板上的数条栅极扫描线、及数条数据线；
    所述数条栅极扫描线、及数条数据线纵横交错围出数个子像素区域；所述数条栅极扫描线、及数条数据线位于所述数个子像素区域的边缘处；
    所述公共电极层上对应所述栅极扫描线、及数据线的上方设有镂空部，所述镂空部与栅极扫描线、及数据线之间的区域无电场产生，从而避免因该区域的液晶被驱动而导致的子像素区域边缘漏光及色偏现象的发生，进而代替黑色矩阵实现遮光作用；
    其中，所述下基板还包括设于第二基板上的钝化层、及设于钝化层上的像素电极层，所述像素电极层对应每个子像素区域具有一个像素电极；所述子像素区域包括红色子像素区域、绿色子像素区域、及蓝色子像素区域；
    其中，所述公共电极层上的镂空部在所述下基板上的投影完全覆盖所述数据线；
    其中，所述公共电极层上的镂空部在所述下基板上的投影完全覆盖所述栅极扫描线。
  12. 如权利要求11所述的HVA型液晶显示面板，其中，所述上基板还包括设于第一基板及公共电极层之间的彩色滤光层，所述彩色滤光层对应所述红色子像素区域、绿色子像素区域、及蓝色子像素区域分别设有红色色阻块、绿色色阻块、及蓝色色阻块。
  13. 如权利要求11所述的HVA型液晶显示面板，其中，所述下基板还包括设于钝化层上的彩色滤光层，所述彩色滤光层对应所述红色子像素区域、绿色子像素区域、及蓝色子像素区域分别设有红色色阻块、绿色色阻块、及蓝色色阻块。
  14. 如权利要求11所述的HVA型液晶显示面板，其中，所述公共电 极层、及像素电极层的材料为ITO。
  15. 如权利要求11所述的HVA型液晶显示面板，其中，所述公共电极层的镂空部通过光罩经由黄光制程形成。
  16. 如权利要求11所述的HVA型液晶显示面板，其中，所述像素电极层为图案化电极层，在每个子像素区域内所述像素电极被划分为多个域。
  17. 如权利要求11所述的HVA型液晶显示面板，其中，所述第一基板、第二基板均为玻璃基板。
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