WO2017041346A1 - 改善色偏的液晶显示面板 - Google Patents

改善色偏的液晶显示面板 Download PDF

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Publication number
WO2017041346A1
WO2017041346A1 PCT/CN2015/091724 CN2015091724W WO2017041346A1 WO 2017041346 A1 WO2017041346 A1 WO 2017041346A1 CN 2015091724 W CN2015091724 W CN 2015091724W WO 2017041346 A1 WO2017041346 A1 WO 2017041346A1
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Prior art keywords
liquid crystal
alignment
strip
angle
pixel region
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PCT/CN2015/091724
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English (en)
French (fr)
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宋彦君
赵永超
谢忠憬
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深圳市华星光电技术有限公司
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Priority to US14/888,439 priority Critical patent/US9804433B2/en
Publication of WO2017041346A1 publication Critical patent/WO2017041346A1/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
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • G—PHYSICS
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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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
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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
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    • 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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    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G—PHYSICS
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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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    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133391—Constructional arrangement for sub-divided displays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • G02F1/133757—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different alignment orientations
    • 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
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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
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal display panel with improved color shift.
  • the liquid crystal display panel is usually composed of a color filter substrate (CF), a thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate), and a liquid crystal layer (Liquid Crystal Layer) disposed between the two substrates.
  • the working principle is that the rotation of the liquid crystal molecules of the liquid crystal layer is controlled by applying a driving voltage on the two glass substrates, and the light of the backlight module is refracted to generate a picture.
  • liquid crystal display panels on the mainstream market can be classified into the following types: Vertical Alignment (VA) type, Twisted Nematic (TN) or Super Twisted (Super Twisted). Nematic, STN) type, In-Plane Switching (IPS) type, and Fringe Field Switching (FFS) type.
  • VA Vertical Alignment
  • TN Twisted Nematic
  • IPS In-Plane Switching
  • FFS Fringe Field Switching
  • liquid crystal molecules are driven in a direction parallel to the plane of the substrate by applying an electric field containing a component substantially parallel to the substrate.
  • the IPS type liquid crystal display panel and the FFS type liquid crystal display panel have the advantages of wide viewing angle.
  • the retardation required to achieve the same transmittance is smaller than that of red and green light, and the transmittance of red, green, and blue light-voltage (VT) curves are different; moreover, red, green, and blue light have different transmittances in the polyimide (PI) film, flattening layer (PFA), coating layer (OC), etc. in the panel. Can cause color shift problems.
  • a conventional method for improving color shift is to increase the thickness of the blue photoresist B in the blue sub-pixel region as shown in FIG.
  • the thickness of the CF substrate corresponding to the blue sub-pixel region is increased, so that the cell gap of the blue sub-pixel region is reduced to achieve the purpose of balancing the chromatic aberration caused by the white point chromaticity;
  • another existing method for improving the color shift Yes through the later circuit design, the GAMMA curves of red, green and blue light are respectively adjusted to make the white point chromaticity meet the optical specifications.
  • An object of the present invention is to provide a liquid crystal display panel with improved color shift by setting different alignment angles in a sub-pixel region of different colors (the alignment direction of the liquid crystal molecules and the pixel electrode) The angle between the branch electrodes), thereby improving the color shift problem.
  • the present invention provides a liquid crystal display panel with improved color shift, comprising: an upper substrate, a lower substrate disposed opposite to the upper substrate, and a liquid crystal layer interposed between the upper substrate and the lower substrate, An upper alignment film disposed on a surface of the upper substrate adjacent to the liquid crystal layer, and a lower alignment film disposed on a surface of the lower substrate adjacent to the liquid crystal layer;
  • the liquid crystal in the liquid crystal layer is a positive liquid crystal
  • the upper alignment film and the lower alignment film are alignment films capable of achieving horizontal alignment
  • the lower substrate has a gate line extending in a horizontal direction, a data line extending in a vertical direction, and a pixel electrode; the plurality of gate scan lines spaced apart in a horizontal direction are spaced apart from the plurality of vertically spaced directions
  • the data lines are insulated and interlaced to define a plurality of red sub-pixel regions, a plurality of green sub-pixel regions, and a plurality of blue sub-pixel regions; wherein the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region are Providing a pixel electrode;
  • the pixel electrode includes two strip-shaped horizontal electrodes that are parallel to each other and spaced apart from each other, and a plurality of strip-shaped branch electrodes connected between the two strip-shaped horizontal electrodes and parallel to each other, the strip-shaped branch electrodes and the data lines Between a certain angle A;
  • the alignment direction of the liquid crystal molecules in the liquid crystal layer is parallel to the data line
  • the relationship between the strip-shaped branch electrodes in the color sub-pixel region and the angle A B between the data lines is: A R > A G > A B .
  • the angle A between the strip-shaped branch electrodes and the data line is less than 30°.
  • An angle A R between the strip-shaped branch electrodes and the data lines in the red sub-pixel region is 15°; an angle A G between the strip-shaped branch electrodes and the data lines in the green sub-pixel region is 10 °; an angle A B between the strip-shaped branch electrodes in the blue sub-pixel region and the data line is 5°.
  • the present invention further provides another liquid crystal display panel with improved color shift, comprising: an upper substrate, a lower substrate disposed opposite to the upper substrate, a liquid crystal layer interposed between the upper substrate and the lower substrate, and disposed at the An upper alignment film on a surface of the substrate adjacent to the liquid crystal layer, and a lower alignment film disposed on a surface of the lower substrate adjacent to the liquid crystal layer;
  • the liquid crystal in the liquid crystal layer is a positive liquid crystal
  • the upper alignment film and the lower alignment film are alignment films capable of achieving horizontal alignment
  • the lower substrate has a gate line extending in a horizontal direction, a data line extending in a vertical direction, and a pixel electrode; the plurality of gate scan lines spaced apart in a horizontal direction are spaced apart from the plurality of vertically spaced directions
  • the data lines are insulated and interlaced to define a plurality of red sub-pixel regions, a plurality of green sub-pixel regions, and a plurality of blue sub-pixel regions; the red sub-pixel region and the green sub-pixel a pixel electrode is disposed in each of the pixel region and the blue sub-pixel region;
  • the pixel electrode includes two strip-shaped horizontal electrodes that are parallel to each other and spaced apart from each other, and a plurality of branch electrodes that are connected between the two strip-shaped horizontal electrodes and are parallel to each other, and the branch electrodes include a clip between the data lines and the data lines a first strip-shaped branch electrode of the corner A and a second strip-shaped branch electrode having an angle -A with the data line;
  • the alignment direction of the liquid crystal molecules in the liquid crystal layer is parallel to the data line
  • An angle A R between the first strip-shaped branch electrode and the data line in the red sub-pixel region, an angle A G between the first strip-shaped branch electrode and the data line in the green sub-pixel region, And a relationship between the first strip-shaped branch electrode in the blue sub-pixel region and the angle A B between the data lines is: A R >A G >A B .
  • the angle A between the first strip-shaped branch electrode and the data line is less than 30°.
  • An angle A R between the first strip-shaped branch electrode and the data line in the red sub-pixel region is 15°; an angle between the first strip-shaped branch electrode and the data line in the green sub-pixel region A G is 10°; an angle A B between the first strip-shaped branch electrode and the data line in the blue sub-pixel region is 5°.
  • the present invention further provides a liquid crystal display panel with improved color shift, comprising: an upper substrate, a lower substrate disposed opposite to the upper substrate, a liquid crystal layer interposed between the upper substrate and the lower substrate, and disposed at the An upper alignment film on a surface of the substrate adjacent to the liquid crystal layer, and a lower alignment film disposed on a surface of the lower substrate adjacent to the liquid crystal layer;
  • the liquid crystal in the liquid crystal layer is a positive liquid crystal
  • the upper alignment film and the lower alignment film are alignment films capable of achieving horizontal alignment
  • the lower substrate has a gate line extending in a horizontal direction, a data line extending in a vertical direction, and a pixel electrode; the plurality of gate scan lines spaced apart in a horizontal direction are spaced apart from the plurality of vertically spaced directions
  • the data lines are insulated and interlaced to define a plurality of red sub-pixel regions, a plurality of green sub-pixel regions, and a plurality of blue sub-pixel regions; wherein the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region are Providing a pixel electrode;
  • the pixel electrode includes two strip-shaped horizontal electrodes parallel to each other and spaced apart from each other, and a plurality of strip-shaped branch electrodes connected between the two strip-shaped horizontal electrodes and parallel to each other, the strip-shaped branch electrodes being parallel to the data lines ;
  • An alignment angle A between the alignment direction of the liquid crystal molecules in the liquid crystal layer and the data line, an angle A R between the alignment direction of the liquid crystal molecules in the red sub-pixel region and the data line, and the green sub-pixel region The relationship between the alignment direction of the alignment direction of the liquid crystal molecules and the data line A G , and the angle between the alignment direction of the liquid crystal molecules in the blue sub-pixel region and the data line A B is: A R >A G >A B .
  • the angle A between the alignment direction of the liquid crystal molecules in the liquid crystal layer and the data line is less than 30°.
  • An angle A R between the alignment direction of the liquid crystal molecules in the red sub-pixel region and the data line is 15°; an angle between the alignment direction of the liquid crystal molecules in the green sub-pixel region and the data line A G It is 10°; the angle A B between the alignment direction of the liquid crystal molecules in the blue sub-pixel region and the data line is 5°.
  • the alignment of the upper alignment film and the lower alignment film is achieved by rubbing alignment or photoalignment.
  • the present invention provides a liquid crystal display panel with improved color shift by setting an alignment angle in a sub-pixel region of different colors (an angle between an alignment direction of liquid crystal molecules and a branch electrode of a pixel electrode) Differently, the alignment angle of the blue sub-pixel region is minimized, so that the luminance of the blue sub-pixel at 255 gray scale is the largest, and the transmittance of the film surface loss such as the PI film, the PFA layer, and the OC layer in the panel can be compensated.
  • the liquid crystal display panel of the present invention modulates the transmittance-voltage curve of light of different colors by setting different alignment angles in sub-pixel regions of different colors, and finally makes the white point chromaticity satisfy the optical specification and improves the color of the panel. Partial problem.
  • FIG. 1 is a schematic structural view of a conventional liquid crystal display panel with improved color shift
  • FIG. 2 is a schematic diagram showing simulation results of transmittance versus voltage curve corresponding to different alignment angles of light
  • FIG. 3 is a schematic diagram showing experimental results of luminance versus voltage curves of liquid crystal display panels corresponding to different alignment angles
  • FIG. 4 is a schematic structural view of a lower substrate of a first embodiment of a liquid crystal display panel with improved color shift according to the present invention
  • FIG. 5 is a schematic structural view of a lower substrate of a second embodiment of a liquid crystal display panel with improved color shift according to the present invention.
  • FIG. 6 is a schematic structural view of a lower substrate of a third embodiment of a liquid crystal display panel with improved color shift according to the present invention.
  • FIG. 7 to FIG. 9 show the lower alignment of the third embodiment of the liquid crystal display panel with improved color shift according to the present invention.
  • the angle between the alignment direction of the liquid crystal molecules and the branch electrode of the pixel electrode is defined as the alignment angle
  • FIG. 2 shows the transmittance-voltage curve of the light corresponding to the different alignment angles.
  • Figure 3 shows the experimental results of the brightness-voltage curve of the liquid crystal display panel corresponding to different alignment angles.
  • the present invention designs to adjust the brightness distribution of different sub-pixel regions by setting different alignment angles in sub-pixel regions of different colors, and finally optimize white point chromaticity to improve the color shift problem of the display panel.
  • the present invention firstly provides a liquid crystal display panel with improved color shift, comprising: an upper substrate, a lower substrate disposed opposite to the upper substrate, and a liquid crystal layer interposed between the upper substrate and the lower substrate, An upper alignment film disposed on a surface of the upper substrate adjacent to the liquid crystal layer, and a lower alignment film disposed on a surface of the lower substrate adjacent to the liquid crystal layer;
  • the liquid crystal in the liquid crystal layer is a positive liquid crystal.
  • the upper alignment film and the lower alignment film are alignment films capable of achieving horizontal alignment, and the specific alignment implementation may be friction alignment or light alignment.
  • FIG. 4 is a schematic structural view of a lower substrate of a first embodiment of a liquid crystal display panel according to the present invention, the lower substrate has a gate line 21 extending in a horizontal direction, a data line 22 extending in a vertical direction, and a pixel electrode 1
  • the plurality of gate scan lines 21 spaced apart in the horizontal direction and the plurality of data lines 22 spaced apart in the vertical direction are insulated and interleaved to define a plurality of red sub-pixel regions R and a plurality of green sub-pixel regions G a plurality of blue sub-pixel regions B; the red sub-pixel region R, the green sub-pixel region G, and the blue sub-pixel region B are each provided with a pixel electrode 1;
  • the pixel electrode 1 includes two strip-shaped horizontal electrodes 11 which are parallel to each other and spaced apart from each other, and a plurality of strip-shaped branch electrodes 12 connected between the two strip-shaped horizontal electrodes 11 and parallel to each other, the strip-shaped branch electrodes 12 and the data line 22 at a certain angle A;
  • the alignment direction of the liquid crystal molecules in the liquid crystal layer is parallel to the data line 22;
  • An angle A R between the strip-shaped branch electrode 12 and the data line 22 in the red sub-pixel region R, an angle A between the strip-shaped branch electrode 12 and the data line 22 in the green sub-pixel region G G , and the relationship between the strip-shaped branch electrodes 12 in the blue sub-pixel region B and the angle A B between the data lines 22 is: A R > A G > A B .
  • an angle A between the strip-shaped branch electrodes 12 and the data line 22 is less than 30°.
  • an angle A R between the strip-shaped branch electrodes 12 and the data lines 22 in the red sub-pixel region R is 15°; strip-shaped branch electrodes 12 and data lines 22 in the green sub-pixel region G The angle A G between them is 10°; the angle A B between the strip-shaped branch electrodes 12 and the data lines 22 in the blue sub-pixel region B is 5°.
  • FIG. 5 is a schematic structural view of a lower substrate of a second embodiment of a liquid crystal display panel according to the present invention
  • the lower substrate has a gate line 21 extending in a horizontal direction, a data line 22 extending in a vertical direction, and a pixel electrode 1
  • the plurality of gate scan lines 21 spaced apart in the horizontal direction and the plurality of data lines 22 spaced apart in the vertical direction are insulated and interleaved to define a plurality of red sub-pixel regions R and a plurality of green sub-pixel regions G a plurality of blue sub-pixel regions B; the red sub-pixel region R, the green sub-pixel region G, and the blue sub-pixel region B are each provided with a pixel electrode 1;
  • the pixel electrode 1 includes two strip-shaped horizontal electrodes 11 parallel to each other and spaced apart from each other, and a plurality of branch electrodes 12 connected between the two strip-shaped horizontal electrodes 11 and parallel to each other, the branch electrodes 12 including data a first strip-like branch electrode 121 having an angle A between the lines 22, and a second strip-shaped branch electrode 122 having an angle -A with the data line 22;
  • the alignment direction of the liquid crystal molecules in the liquid crystal layer is parallel to the data line 22;
  • An angle A R between the first strip-shaped branch electrode 121 and the data line 22 in the red sub-pixel region R, and between the first strip-shaped branch electrode 121 and the data line 22 in the green sub-pixel region G The relationship between the angle A G and the angle A B between the first strip-shaped branch electrode 121 and the data line 22 in the blue sub-pixel region B is: A R > A G > A B .
  • an angle A between the first strip-shaped branch electrode 121 and the data line 22 is less than 30°.
  • an angle A R between the first strip-shaped branch electrode 121 and the data line 22 in the red sub-pixel region R is 15°; and the first strip-shaped branch electrode 121 in the green sub-pixel region G
  • the lower substrate further includes a TFT 30 distributed in the red, green, and blue sub-pixel regions R, G, and B, and the TFT 30 includes a gate and a source.
  • the gate and the gate of the TFT 30 are connected to the gate line 21, the source is connected to the data line 22, and the drain is connected to the pixel electrode 1.
  • the alignment directions of the liquid crystal molecules in the sub-pixel regions are the same, and the branch electrodes of the pixel electrodes in the sub-pixel regions of different colors have different tilt angles, so that the alignment of the blue sub-pixel regions Angle (the alignment direction and image of liquid crystal molecules)
  • the angle between the branch electrodes of the element electrode is the smallest, so the blue sub-pixel brightness is the largest in the 255 gray scale, which can compensate the transmittance of the film surface loss of the PI film, the PFA film, the OC layer and the like in the panel.
  • the transmittance of the sub-pixel region of different colors is modulated by setting the angle between the alignment direction of the liquid crystal molecules in the sub-pixel regions of different colors and the branch electrodes of the pixel electrodes (alignment angle).
  • the curve finally makes the white point chromaticity meet the optical specifications and improves the color shift of the panel.
  • the present invention further provides another liquid crystal display panel with improved color shift, comprising: an upper substrate, a lower substrate disposed opposite to the upper substrate, a liquid crystal layer interposed between the upper substrate and the lower substrate, and disposed at the An upper alignment film on a surface of the substrate adjacent to the liquid crystal layer, and a lower alignment film disposed on a surface of the lower substrate adjacent to the liquid crystal layer;
  • the liquid crystal in the liquid crystal layer is a positive liquid crystal.
  • the upper alignment film and the lower alignment film are alignment films capable of achieving horizontal alignment, and the specific alignment implementation may be friction alignment or light alignment.
  • FIG. 6 is a schematic structural view of a lower substrate of a liquid crystal display panel according to a third embodiment of the present invention
  • the lower substrate has a gate line 21 extending in a horizontal direction, a data line 22 extending in a vertical direction, and a pixel electrode 1
  • the plurality of gate scan lines 21 spaced apart in the horizontal direction and the plurality of data lines 22 spaced apart in the vertical direction are insulated and interleaved to define a plurality of red sub-pixel regions R and a plurality of green sub-pixel regions G a plurality of blue sub-pixel regions B; the red sub-pixel region R, the green sub-pixel region G, and the blue sub-pixel region B are each provided with a pixel electrode 1;
  • the pixel electrode 1 includes two strip-shaped horizontal electrodes 11 which are parallel to each other and spaced apart from each other, and a plurality of strip-shaped branch electrodes 12 connected between the two strip-shaped horizontal electrodes 11 and parallel to each other, the strip-shaped branch electrodes 12 is parallel to the data line 22;
  • the alignment direction of the liquid crystal molecules in the liquid crystal layer and the data line 22 are at an angle A, and the alignment direction of the liquid crystal molecules in the red sub-pixel region R and the angle A R of the data line 22, the green An angle A G between the alignment direction of the liquid crystal molecules in the sub-pixel region G and the data line 22, and an angle A B between the alignment direction of the liquid crystal molecules in the blue sub-pixel region B and the data line 22
  • a R >A G >A B The relationship is: A R >A G >A B .
  • an angle A between the alignment direction of the liquid crystal molecules in the liquid crystal layer and the data line 22 is less than 30°.
  • an angle A R between the alignment direction of the liquid crystal molecules in the red sub-pixel region R and the data line 22 is 15°; an alignment direction of the liquid crystal molecules in the green sub-pixel region G and the data line 22 The angle A G between them is 10°; the angle A B between the alignment direction of the liquid crystal molecules in the blue sub-pixel region B and the data line 22 is 5°.
  • the lower substrate further includes red, green, and And the TFT 30 in the blue sub-pixel region R, G, B, the TFT 30 includes a gate, a source, and a drain, and the gate of the TFT 30 is connected to the gate line 21, the source connection data line 22, A drain is connected to the pixel electrode 1.
  • the alignment process of the upper alignment film and the lower alignment film is as follows: Referring to FIG. 7-9, after the alignment film is coated on the lower substrate, a mask M1 is first used to block the film.
  • the green sub-pixel region G and the blue sub-pixel region B of the lower substrate are aligned with the lower alignment film in the red sub-pixel region R; then the red sub-pixel region R and the blue sub-pixel region are blocked by using the mask M2 B, aligning the lower alignment film in the green sub-pixel region G; finally occluding the red sub-pixel region R and the green sub-pixel region G with the mask M3, and aligning the lower alignment film in the blue sub-pixel region B;
  • the alignment order of the upper alignment film on the substrate is the same as the alignment order of the lower alignment film; after the alignment of the upper and lower alignment films is completed, the upper and lower substrates are assembled and poured into the liquid crystal layer, and the obtained liquid crystal display panel is The liquid crystal molecules in the red sub-pixel region R have the largest
  • the structure of the pixel electrodes in each sub-pixel region is the same, and the liquid crystal molecules in the sub-pixel regions of different colors are aligned by different angles by using the mask to minimize the alignment angle of the blue sub-pixel region. Therefore, the 255 gray-scale blue sub-pixel has the highest brightness, which can compensate the transmittance of the film surface loss of the PI film, the PFA film, the OC layer, and the like in the panel.
  • the liquid crystal display panel of the present invention modulates the transmittance-voltage curve of light of different colors by setting the angle between the alignment direction of the liquid crystal molecules in the sub-pixel regions of different colors and the branch electrodes of the pixel electrodes (alignment angle). Finally, the white point chromaticity meets the optical specifications, and the color shift problem of the panel is improved.
  • the liquid crystal display panel with improved color shift of the present invention is different in blue by setting the alignment angle (the angle between the alignment direction of the liquid crystal molecules and the branch electrode of the pixel electrode) in the sub-pixel regions of different colors.
  • the chromatic sub-pixel area has the smallest alignment angle, so the 256 gray-scale blue sub-pixel has the highest brightness, which can compensate the transmittance of the film surface loss such as the PI film, the PFA layer, and the OC layer in the panel.
  • the liquid crystal display panel of the present invention modulates the transmittance-voltage curve of light of different colors by setting different alignment angles in sub-pixel regions of different colors, and finally makes the white point chromaticity satisfy the optical specification and improves the color of the panel. Partial problem.

Abstract

一种改善色偏的液晶显示面板，通过在不同颜色的子像素区域中设置不同的配向角度(液晶分子的配向方向与像素电极的分支电极（12）之间的夹角)，使得红色子像素区域（R）的配向角度最大，绿色子像素区域（G）的配向角度较小，蓝色子像素区域（B）的配向角度最小，从而可以分别调制不同颜色的光的穿透率-电压曲线和亮度-电压曲线，优化白点色度使其满足光学规格，还可以补偿蓝光在面板中损失的穿透率，改善面板的色偏问题。

Description

改善色偏的液晶显示面板 技术领域
本发明涉及显示技术领域，尤其涉及一种改善色偏的液晶显示面板。
背景技术
液晶显示面板的通常是由一彩膜基板(Color Filter，CF)、一薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)以及一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。按照液晶的取向方式不同，目前主流市场上的液晶显示面板可以分为以下几种类型：垂直配向(Vertical Alignment，VA)型、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、及边缘场开关(Fringe Field Switching，FFS)型。
在IPS模式或FFS模式中，通过施加含有基本平行于基板的分量的电场，使液晶分子在平行于基板平面的方向相应而驱动液晶分子。
IPS型液晶显示面板和FFS型液晶显示面板，二者具有广视角的优点。但由于蓝光的波长较短，与红光和绿光相比，达到相同穿透率(Transmittance)所需的相位差(retardation)较小，红光、绿光和蓝光的穿透率-电压(VT)曲线不同；而且，红光、绿光和蓝光在面板中的聚酰亚胺(PI)膜、平坦化层(PFA)、涂覆层(OC)等膜面的穿透率不同，也会导致出现色偏问题。
为了改善上述IPS型液晶显示面板和FFS型液晶显示面板的色偏问题，现有的一种改善色偏的方法是，如图1所示，增加蓝色子像素区域中蓝色光阻B的厚度，使蓝色子像素区域对应的CF基板的厚度增加，这样蓝色子像素区域的盒间隙变小，达到平衡白点色度产生的色差的目的；现有的另一种改善色偏的方法是，通过后期的电路设计，分别调整红光、绿光和蓝光的GAMMA曲线，使白点色度满足光学规格。
发明内容
本发明的目的在于提供一种改善色偏的液晶显示面板，通过在不同颜色的子像素区域中设置不同的配向角度(液晶分子的配向方向与像素电极 的分支电极之间的夹角)，从而改善色偏问题。
为实现上述目的，本发明提供一种改善色偏的液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、夹设于所述上基板与下基板之间的液晶层、设于所述上基板靠近液晶层一侧表面上的上配向膜、及设于所述下基板靠近液晶层一侧表面上的下配向膜；
所述液晶层中的液晶为正型液晶；
所述上配向膜和下配向膜是可实现水平配向的配向膜；
所述下基板具有沿水平方向延伸的栅极线、沿竖直方向延伸的数据线、及像素电极；所述多条沿水平方向间隔设置的栅极扫描线与多条沿竖直方向间隔设置的数据线相互绝缘交错，划分出多个红色子像素区域、多个绿色子像素区域、多个蓝色子像素区域；所述红色子像素区域、绿色子像素区域、蓝色子像素区域中均设有像素电极；
所述像素电极包括两个相互平行且相互间隔的条状水平电极、及连接于两个条状水平电极之间且相互平行的数个条状分支电极，所述条状分支电极与数据线之间呈一定夹角A；
所述液晶层中的液晶分子的配向方向与数据线平行；
所述红色子像素区域中的条状分支电极与数据线之间的夹角AR、所述绿色子像素区域中的条状分支电极与数据线之间的夹角AG、及所述蓝色子像素区域中的条状分支电极与数据线之间的夹角AB之间的关系为：AR>AG>AB。
所述条状分支电极与数据线之间的夹角A小于30°。
所述红色子像素区域中的条状分支电极与数据线之间的夹角AR为15°；所述绿色子像素区域中的条状分支电极与数据线之间的夹角AG为10°；所述蓝色子像素区域中的条状分支电极与数据线之间的夹角AB为5°。
本发明还提供另一种改善色偏的液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、夹设于所述上基板与下基板之间的液晶层、设于所述上基板靠近液晶层一侧表面上的上配向膜、及设于所述下基板靠近液晶层一侧表面上的下配向膜；
所述液晶层中的液晶为正型液晶；
所述上配向膜和下配向膜是可实现水平配向的配向膜；
所述下基板具有沿水平方向延伸的栅极线、沿竖直方向延伸的数据线、及像素电极；所述多条沿水平方向间隔设置的栅极扫描线与多条沿竖直方向间隔设置的数据线相互绝缘交错，划分出多个红色子像素区域、多个绿色子像素区域、多个蓝色子像素区域；所述红色子像素区域、绿色子 像素区域、蓝色子像素区域中均设有像素电极；
所述像素电极包括两个相互平行且相互间隔的条状水平电极、及连接于两个条状水平电极之间且相互平行的数个分支电极，所述分支电极包括与数据线之间呈夹角A的第一条状分支电极、及与数据线之间呈夹角-A的第二条状分支电极；
所述液晶层中的液晶分子的配向方向与数据线平行；
所述红色子像素区域中的第一条状分支电极与数据线之间的夹角AR、所述绿色子像素区域中的第一条状分支电极与数据线之间的夹角AG、及所述蓝色子像素区域中的第一条状分支电极与数据线之间的夹角AB之间的关系为：AR>AG>AB。
所述第一条状分支电极与数据线之间的夹角A小于30°。
所述红色子像素区域中的第一条状分支电极与数据线之间的夹角AR为15°；所述绿色子像素区域中的第一条状分支电极与数据线之间的夹角AG为10°；所述蓝色子像素区域中的第一条状分支电极与数据线之间的夹角AB为5°。
本发明还提供又一种改善色偏的液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、夹设于所述上基板与下基板之间的液晶层、设于所述上基板靠近液晶层一侧表面上的上配向膜、及设于所述下基板靠近液晶层一侧表面上的下配向膜；
所述液晶层中的液晶为正型液晶；
所述上配向膜和下配向膜是可实现水平配向的配向膜；
所述下基板具有沿水平方向延伸的栅极线、沿竖直方向延伸的数据线、及像素电极；所述多条沿水平方向间隔设置的栅极扫描线与多条沿竖直方向间隔设置的数据线相互绝缘交错，划分出多个红色子像素区域、多个绿色子像素区域、多个蓝色子像素区域；所述红色子像素区域、绿色子像素区域、蓝色子像素区域中均设有像素电极；
所述像素电极包括两个相互平行且相互间隔的条状水平电极、及连接于两个条状水平电极之间且相互平行的数个条状分支电极，所述条状分支电极与数据线平行；
所述液晶层中的液晶分子的配向方向与数据线之间呈一定夹角A，所述红色子像素区域中的液晶分子的配向方向与数据线的夹角AR、所述绿色子像素区域中的液晶分子的配向方向与数据线之间的夹角AG、及所述蓝色子像素区域中的液晶分子的配向方向与数据线之间的夹角AB之间的关系为：AR>AG>AB。
所述液晶层中的液晶分子的配向方向与数据线之间的夹角A小于30°。
所述红色子像素区域中的液晶分子的配向方向与数据线之间的夹角AR为15°；所述绿色子像素区域中的液晶分子的配向方向与数据线之间的夹角AG为10°；所述蓝色子像素区域中的液晶分子的配向方向与数据线之间的夹角AB为5°。
所述上配向膜和下配向膜的配向实现方式为摩擦配向或光配向。
本发明的有益效果：本发明提供的一种改善色偏的液晶显示面板，通过设置不同颜色的子像素区域中的配向角度(液晶分子的配向方向与像素电极的分支电极之间的夹角)不同，使蓝色子像素区域的配向角度最小，因此在255灰阶蓝色子像素亮度最大，可以补偿其在面板中PI膜、PFA层、OC层等膜面损失的穿透率。本发明的液晶显示面板，通过在不同颜色的子像素区域中设置不同的配向角度，来调制不同颜色的光的穿透率-电压曲线，最终使白点色度满足光学规格，改善面板的色偏问题。
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它有益效果显而易见。
附图中，
图1为现有的一种改善色偏的液晶显示面板的结构示意图；
图2为对应不同的配向角度光线的穿透率随电压变化曲线的模拟结果示意图；
图3为对应不同的配向角度液晶显示面板的亮度随电压变化曲线的实验结果示意图；
图4为本发明的改善色偏的液晶显示面板第一实施例的下基板的结构示意图；
图5为本发明的改善色偏的液晶显示面板第二实施例的下基板的结构示意图；
图6为本发明的改善色偏的液晶显示面板第三实施例的下基板的结构示意图；
图7至图9为本发明的改善色偏的液晶显示面板第三实施例的下配向 膜的配向过程的流程示意图。
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。
本发明的发明构思基于以下原理：
如图2、图3所示，将液晶分子的配向方向与像素电极的分支电极之间的夹角定义为配向角度，图2所示为对应不同的配向角度的光线的穿透率-电压曲线的模拟结果，图3所示为对应不同的配向角度的液晶显示面板的亮度-电压曲线的实验结果。如图2与图3所示，随着配向角度的增加，光线的穿透率降低，液晶显示面板的亮度降低，阀值电压也有所下降，实验结果与模拟结果的曲线有相同的变化趋势。因此本发明设计通过在不同颜色的子像素区域中设置不同的配向角度，调整不同子像素区域的亮度分布，最终优化白点色度，改善显示面板的色偏问题。
基于上述原理，本发明首先提供一种改善色偏的液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、夹设于所述上基板与下基板之间的液晶层、设于所述上基板靠近液晶层一侧表面上的上配向膜、及设于所述下基板靠近液晶层一侧表面上的下配向膜；
所述液晶层中的液晶为正型液晶。
所述上配向膜和下配向膜是可实现水平配向的配向膜，具体的配向实现方式可为摩擦配向或光配向。
参阅图4，为本发明液晶显示面板第一实施例的下基板的结构示意图，所述下基板具有沿水平方向延伸的栅极线21、沿竖直方向延伸的数据线22、及像素电极1；所述多条沿水平方向间隔设置的栅极扫描线21与多条沿竖直方向间隔设置的数据线22相互绝缘交错，划分出多个红色子像素区域R、多个绿色子像素区域G、多个蓝色子像素区域B；所述红色子像素区域R、绿色子像素区域G、蓝色子像素区域B中均设有像素电极1；
所述像素电极1包括两个相互平行且相互间隔的条状水平电极11、及连接于两个条状水平电极11之间且相互平行的数个条状分支电极12，所述条状分支电极12与数据线22之间呈一定夹角A；
所述液晶层中的液晶分子的配向方向与数据线22平行；
所述红色子像素区域R中的条状分支电极12与数据线22之间的夹角AR、所述绿色子像素区域G中的条状分支电极12与数据线22之间的夹角AG、及所述蓝色子像素区域B中的条状分支电极12与数据线22之间的夹 角AB之间的关系为：AR>AG>AB。
具体的，所述条状分支电极12与数据线22之间的夹角A小于30°。
优选的，所述红色子像素区域R中的条状分支电极12与数据线22之间的夹角AR为15°；所述绿色子像素区域G中的条状分支电极12与数据线22之间的夹角AG为10°；所述蓝色子像素区域B中的条状分支电极12与数据线22之间的夹角AB为5°。
参阅图5，为本发明液晶显示面板第二实施例的下基板的结构示意图，所述下基板具有沿水平方向延伸的栅极线21、沿竖直方向延伸的数据线22、及像素电极1；所述多条沿水平方向间隔设置的栅极扫描线21与多条沿竖直方向间隔设置的数据线22相互绝缘交错，划分出多个红色子像素区域R、多个绿色子像素区域G、多个蓝色子像素区域B；所述红色子像素区域R、绿色子像素区域G、蓝色子像素区域B中均设有像素电极1；
所述像素电极1包括两个相互平行且相互间隔的条状水平电极11、及连接于两个条状水平电极11之间且相互平行的数个分支电极12，所述分支电极12包括与数据线22之间呈夹角A的第一条状分支电极121、及与数据线22之间呈夹角-A的第二条状分支电极122；
所述液晶层中的液晶分子的配向方向与数据线22平行；
所述红色子像素区域R中的第一条状分支电极121与数据线22之间的夹角AR、所述绿色子像素区域G中的第一条状分支电极121与数据线22之间的夹角AG、及所述蓝色子像素区域B中的第一条状分支电极121与数据线22之间的夹角AB之间的关系为：AR>AG>AB。
具体的，所述第一条状分支电极121与数据线22之间的夹角A小于30°。
优选的，所述红色子像素区域R中的第一条状分支电极121与数据线22之间的夹角AR为15°；所述绿色子像素区域G中的第一条状分支电极121与数据线22之间的夹角AG为10°；所述蓝色子像素区域B中的第一条状分支电极121与数据线22之间的夹角AB为5°。
具体的，上述第一与第二实施例中，所述下基板还包括分布于红色、绿色、及蓝色子像素区域R、G、B中的TFT 30，所述TFT 30包括栅极、源极、漏极，所述TFT 30的栅极连接栅极线21、源极连接数据线22、漏极连接所述像素电极1。
上述改善色偏的液晶显示面板，各子像素区域中液晶分子的配向方向相同，通过设置不同颜色的子像素区域中的像素电极的分支电极具有不同的倾斜角度，使得蓝色子像素区域的配向角度(液晶分子的配向方向与像 素电极的分支电极之间的夹角)最小，因此在255灰阶蓝色子像素亮度最大，可以补偿其在面板中PI膜、PFA膜、OC层等膜面损失的穿透率。本发明的液晶显示面板，通过设置不同颜色的子像素区域中液晶分子的配向方向与像素电极的分支电极的夹角(配向角度)不同，来调制不同颜色的子像素区域的穿透率-电压曲线，最终使白点色度满足光学规格，改善面板的色偏问题。
本发明还提供另一种改善色偏的液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、夹设于所述上基板与下基板之间的液晶层、设于所述上基板靠近液晶层一侧表面上的上配向膜、及设于所述下基板靠近液晶层一侧表面上的下配向膜；
所述液晶层中的液晶为正型液晶。
所述上配向膜和下配向膜是可实现水平配向的配向膜，具体的配向实现方式可为摩擦配向或光配向。
参阅图6，为本发明液晶显示面板第三实施例的下基板的结构示意图，所述下基板具有沿水平方向延伸的栅极线21、沿竖直方向延伸的数据线22、及像素电极1；所述多条沿水平方向间隔设置的栅极扫描线21与多条沿竖直方向间隔设置的数据线22相互绝缘交错，划分出多个红色子像素区域R、多个绿色子像素区域G、多个蓝色子像素区域B；所述红色子像素区域R、绿色子像素区域G、蓝色子像素区域B中均设有像素电极1；
所述像素电极1包括两个相互平行且相互间隔的条状水平电极11、及连接于两个条状水平电极11之间且相互平行的数个条状分支电极12，所述条状分支电极12与数据线22平行；
所述液晶层中的液晶分子的配向方向与数据线22之间呈一定夹角A，所述红色子像素区域R中的液晶分子的配向方向与数据线22的夹角AR、所述绿色子像素区域G中的液晶分子的配向方向与数据线22之间的夹角AG、及所述蓝色子像素区域B中的液晶分子的配向方向与数据线22之间的夹角AB之间的关系为：AR>AG>AB。
具体的，所述液晶层中的液晶分子的配向方向与数据线22之间的夹角A小于30°。
优选的，所述红色子像素区域R中的液晶分子的配向方向与数据线22之间的夹角AR为15°；所述绿色子像素区域G中的液晶分子的配向方向与数据线22之间的夹角AG为10°；所述蓝色子像素区域B中的液晶分子的配向方向与数据线22之间的夹角AB为5°。
具体的，上述第三实施例中，所述下基板还包括分布于红色、绿色、 及蓝色子像素区域R、G、B中的TFT 30，所述TFT 30包括栅极、源极、漏极，所述TFT 30的栅极连接栅极线21、源极连接数据线22、漏极连接所述像素电极1。
具体的，上述第三实施例中，所述上配向膜与下配向膜的配向过程为：参阅图7-9，在下基板上涂布下配向膜后，采用一光罩(mask)M1首先遮挡所述下基板的绿色子像素区域G和蓝色子像素区域B，对红色子像素区域R中的下配向膜进行配向；然后用使用光罩M2遮挡红色子像素区域R和蓝色子像素区域B，对绿色子像素区域G中的下配向膜进行配向；最后用光罩M3遮挡红色子像素区域R和绿色子像素区域G，对蓝色子像素区域B中的下配向膜进行配向；所述上基板上的上配向膜的配向顺序与下配向膜的配向顺序相同；对上、下配向膜分别完成配向后，对上、下基板进行组装并灌入液晶层，得到的液晶显示面板中，红色子像素区域R中的液晶分子具有最大的配向角度(液晶分子的配向方向与像素电极的分支电极之间的夹角)，如15°；使绿色子像素区域R中的液晶分子具有较小的配向角度，如10°；使蓝色子像域B中的液晶分子具有最小的配向角度，如5°。
上述改善色偏的液晶显示面板，各子像素区域中像素电极的结构相同，利用光罩对不同颜色的子像素区域中的液晶分子进行不同角度的配向，使蓝色子像素区域的配向角度最小，因此在255灰阶蓝色子像素亮度最大，可以补偿其在面板中PI膜、PFA膜、OC层等膜面损失的穿透率。本发明的液晶显示面板，通过设置不同颜色的子像素区域中液晶分子的配向方向与像素电极的分支电极的夹角(配向角度)不同，来调制不同颜色的光的穿透率-电压曲线，最终使白点色度满足光学规格，改善面板的色偏问题。
综上所述，本发明的改善色偏的液晶显示面板，通过设置不同颜色的子像素区域中的配向角度(液晶分子的配向方向与像素电极的分支电极之间的夹角)不同，使蓝色子像素区域的配向角度最小，因此在255灰阶蓝色子像素亮度最大，可以补偿其在面板中PI膜、PFA层、OC层等膜面损失的穿透率。本发明的液晶显示面板，通过在不同颜色的子像素区域中设置不同的配向角度，来调制不同颜色的光的穿透率-电压曲线，最终使白点色度满足光学规格，改善面板的色偏问题。
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 (12)

  1. 一种改善色偏的液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、夹设于所述上基板与下基板之间的液晶层、设于所述上基板靠近液晶层一侧表面上的上配向膜、及设于所述下基板靠近液晶层一侧表面上的下配向膜；
    所述液晶层中的液晶为正型液晶；
    所述上配向膜和下配向膜是可实现水平配向的配向膜；
    所述下基板具有沿水平方向延伸的栅极线、沿竖直方向延伸的数据线、及像素电极；所述多条沿水平方向间隔设置的栅极扫描线与多条沿竖直方向间隔设置的数据线相互绝缘交错，划分出多个红色子像素区域、多个绿色子像素区域、多个蓝色子像素区域；所述红色子像素区域、绿色子像素区域、蓝色子像素区域中均设有像素电极；
    所述像素电极包括两个相互平行且相互间隔的条状水平电极、及连接于两个条状水平电极之间且相互平行的数个条状分支电极，所述条状分支电极与数据线之间呈一定夹角A；
    所述液晶层中的液晶分子的配向方向与数据线平行；
    所述红色子像素区域中的条状分支电极与数据线之间的夹角AR、所述绿色子像素区域中的条状分支电极与数据线之间的夹角AG、及所述蓝色子像素区域中的条状分支电极与数据线之间的夹角AB之间的关系为：AR>AG>AB。
  2. 如权利要求1所述的改善色偏的液晶显示面板，其中，所述条状分支电极与数据线之间的夹角A小于30°。
  3. 如权利要求1所述的改善色偏的液晶显示面板，其中，所述红色子像素区域中的条状分支电极与数据线之间的夹角AR为15°；所述绿色子像素区域中的条状分支电极与数据线之间的夹角AG为10°；所述蓝色子像素区域中的条状分支电极与数据线之间的夹角AB为5°。
  4. 如权利要求1所述的改善色偏的液晶显示面板，其中，所述上配向膜和下配向膜的配向实现方式为摩擦配向或光配向。
  5. 一种改善色偏的液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、夹设于所述上基板与下基板之间的液晶层、设于所述上基板靠近液晶层一侧表面上的上配向膜、及设于所述下基板靠近液晶层一侧表面上的下配向膜；
    所述液晶层中的液晶为正型液晶；
    所述上配向膜和下配向膜是可实现水平配向的配向膜；
    所述下基板具有沿水平方向延伸的栅极线、沿竖直方向延伸的数据线、及像素电极；所述多条沿水平方向间隔设置的栅极扫描线与多条沿竖直方向间隔设置的数据线相互绝缘交错，划分出多个红色子像素区域、多个绿色子像素区域、多个蓝色子像素区域；所述红色子像素区域、绿色子像素区域、蓝色子像素区域中均设有像素电极；
    所述像素电极包括两个相互平行且相互间隔的条状水平电极、及连接于两个条状水平电极之间且相互平行的数个分支电极，所述分支电极包括与数据线之间呈夹角A的第一条状分支电极、及与数据线之间呈夹角-A的第二条状分支电极；
    所述液晶层中的液晶分子的配向方向与数据线平行；
    所述红色子像素区域中的第一条状分支电极与数据线之间的夹角AR、所述绿色子像素区域中的第一条状分支电极与数据线之间的夹角AG、及所述蓝色子像素区域中的第一条状分支电极与数据线之间的夹角AB之间的关系为：AR>AG>AB。
  6. 如权利要求5所述的改善色偏的液晶显示面板，其中，所述第一条状分支电极与数据线之间的夹角A小于30°。
  7. 如权利要求5所述的改善色偏的液晶显示面板，其中，所述红色子像素区域中的第一条状分支电极与数据线之间的夹角AR为15°；所述绿色子像素区域中的第一条状分支电极与数据线之间的夹角AG为10°；所述蓝色子像素区域中的第一条状分支电极与数据线之间的夹角AB为5°。
  8. 如权利要求5所述的改善色偏的液晶显示面板，其中，所述上配向膜和下配向膜的配向实现方式为摩擦配向或光配向。
  9. 一种改善色偏的液晶显示面板，包括：上基板、与所述上基板相对设置的下基板、夹设于所述上基板与下基板之间的液晶层、设于所述上基板靠近液晶层一侧表面上的上配向膜、及设于所述下基板靠近液晶层一侧表面上的下配向膜；
    所述液晶层中的液晶为正型液晶；
    所述上配向膜和下配向膜是可实现水平配向的配向膜；
    所述下基板具有沿水平方向延伸的栅极线、沿竖直方向延伸的数据线、及像素电极；所述多条沿水平方向间隔设置的栅极扫描线与多条沿竖直方向间隔设置的数据线相互绝缘交错，划分出多个红色子像素区域、多个绿色子像素区域、多个蓝色子像素区域；所述红色子像素区域、绿色子像素 区域、蓝色子像素区域中均设有像素电极；
    所述像素电极包括两个相互平行且相互间隔的条状水平电极、及连接于两个条状水平电极之间且相互平行的数个条状分支电极，所述条状分支电极与数据线平行；
    所述液晶层中的液晶分子的配向方向与数据线之间呈一定夹角A，所述红色子像素区域中的液晶分子的配向方向与数据线的夹角AR、所述绿色子像素区域中的液晶分子的配向方向与数据线之间的夹角AG、及所述蓝色子像素区域中的液晶分子的配向方向与数据线之间的夹角AB之间的关系为：AR>AG>AB。
  10. 如权利要求9所述的改善色偏的液晶显示面板，其中，所述液晶层中的液晶分子的配向方向与数据线之间的夹角A小于30°。
  11. 如权利要求9所述的改善色偏的液晶显示面板，其中，所述红色子像素区域中的液晶分子的配向方向与数据线之间的夹角AR为15°；所述绿色子像素区域中的液晶分子的配向方向与数据线之间的夹角AG为10°；所述蓝色子像素区域中的液晶分子的配向方向与数据线之间的夹角AB为5°。
  12. 如权利要求9所述的改善色偏的液晶显示面板，其中，所述上配向膜和下配向膜的配向实现方式为摩擦配向或光配向。
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