WO2013016885A1 - Pva像素电极及相应的液晶显示装置 - Google Patents

Pva像素电极及相应的液晶显示装置 Download PDF

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WO2013016885A1
WO2013016885A1 PCT/CN2011/078953 CN2011078953W WO2013016885A1 WO 2013016885 A1 WO2013016885 A1 WO 2013016885A1 CN 2011078953 W CN2011078953 W CN 2011078953W WO 2013016885 A1 WO2013016885 A1 WO 2013016885A1
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electrode
type
liquid crystal
pixel
ito
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PCT/CN2011/078953
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English (en)
French (fr)
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姚晓慧
许哲豪
薛景峰
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深圳市华星光电技术有限公司
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Priority to US13/379,940 priority Critical patent/US9377653B2/en
Publication of WO2013016885A1 publication Critical patent/WO2013016885A1/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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—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
    • 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
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a PVA pixel electrode and a corresponding liquid crystal display device capable of improving pixel transmittance and display quality.
  • PVA Plasma Vertical Alignment, image vertical adjustment technology
  • VA Vertical Alignment
  • TFT Thin film Transistor
  • CF color filter, color Filter
  • the conventionally adopted ""” or “" type PVA pixel structure results in PVA due to the difference in the edge and internal structure of the ""” or “” type PVA pixel electrode.
  • the electric field distribution of the pixel edge is different from the inside, and the fringe field effect is generated on the liquid crystal, so that the intersection of the """ or “" shaped edge on the TFT side and the CF side produces a rotational displacement (disclination), which affects the display quality of the pixel and reduces the pixel.
  • the aperture ratio as shown in FIG. 5A, is marked in the figure. Due to the fringe field effect, the liquid crystal generates a rotational displacement, which causes dark pixels in the pixel, and the transmittance is lowered, which affects the display quality of the pixel.
  • the present invention is directed to the PVA pixel electrode of the prior art and the PVA pixel of the corresponding liquid crystal display device, which has the defect that the fringe field effect on the liquid crystal affects the display quality of the pixel and reduces the aperture ratio of the pixel, and provides a modification of the TFT side or the CF side.
  • Edge junction ITO Indium-Tin Oxide, indium tin oxide
  • PVA pixel electrodes and corresponding liquid crystal display devices that eliminate the fringe field effect to achieve the effect of improving pixel transmittance and display quality.
  • a main object of the present invention is to provide a PVA pixel electrode comprising: a first electrode of a """ type or "" type on the TFT side; and a """ type corresponding to the first electrode on the CF side Or a second electrode of the "" type, controlling the orientation of the liquid crystal disposed between the first electrode and the second electrode by an electric field applied to the first electrode and the second electrode, by An ITO gap of unequal length is disposed on the first electrode and/or the second electrode at an edge boundary of the first electrode and the second electrode to improve display quality of the pixel;
  • the difference in length between adjacent ITO gap ends is 1 um to 10 um; the difference in length between adjacent ITO gap ends of the second electrode is 1 um to 15 um; when the first electrode and the second electrode are both """ type electrodes
  • the ITO gaps disposed by the first electrode and the second electrode are both located at the upper right, lower right, and left portions of the electrode; when the first electrode and the second electrode are both ""-type electrodes
  • a main object of the present invention is to provide a PVA pixel electrode comprising: a first electrode of a """ type or “" type on the TFT side; and a "" corresponding to the first electrode on the CF side” a second electrode of the type or "" type, controlling the orientation of the liquid crystal disposed between the first electrode and the second electrode by an electric field applied to the first electrode and the second electrode,
  • An ITO gap of unequal length is disposed on the first electrode and/or the second electrode at an edge boundary of the first electrode and the second electrode to improve display quality of the pixel.
  • a main object of the present invention is to provide a liquid crystal display device comprising: a liquid crystal; a TFT for controlling the liquid crystal turning; a CF for displaying different colors on the display; and a PVA pixel electrode; the PVA pixel electrode comprising a first electrode of the """ type or "" type on the TFT side; and a second electrode of the """ type or “” type corresponding to the first electrode on the CF side, by being applied thereto
  • the electric field on the first electrode and the second electrode controls the orientation of the liquid crystal disposed between the first electrode and the second electrode, by the boundary between the edges of the first electrode and the second electrode
  • An ITO gap of unequal length is disposed on the first electrode and/or the second electrode to improve display quality of the pixel.
  • the difference in length between adjacent ITO gap ends of the first electrode is 1 um to 10 um.
  • the difference in length between the adjacent ITO gap ends of the second electrode is 1 um to 15 um.
  • the ITO gap provided by the first electrode is located in the upper right, lower right, and left portions of the first electrode.
  • the ITO gap provided by the first electrode is located at the upper left, lower left, and right portions of the first electrode.
  • the ITO gap provided by the second electrode is located in the upper right, lower right, and left portions of the second electrode.
  • the ITO gap provided by the second electrode is located at the upper left, lower left, and right portions of the second electrode.
  • the PVA pixel electrode and the corresponding liquid crystal display of the present invention have the problem that the PVA pixel generates a fringe field effect on the liquid crystal to affect the display quality of the pixel and reduce the aperture ratio of the pixel.
  • the device eliminates the fringe field effect by modifying the ITO gap at the edge boundary of the TFT side or the CF side to achieve an effect of improving the transmittance and display quality of the pixel.
  • the PVA pixel electrode and the corresponding liquid crystal display of the present invention have the problem that the PVA pixel generates a fringe field effect on the liquid crystal to affect the display quality of the pixel and reduce the aperture ratio of the pixel.
  • the device eliminates the edge field effect by modifying the ITO gap at the edge of the edge of the TFT side or the CF side to achieve the effect of improving pixel transmittance and display quality. .
  • 1A is a schematic structural view of a first electrode on a TFT side of a PVA pixel electrode of the prior art
  • 1B is a schematic diagram showing the reverse structure of a second electrode on the CF side of a PVA pixel electrode of the prior art
  • FIG. 2A is a schematic structural view of a first electrode on a TFT side of a first preferred embodiment of a PVA pixel electrode of the present invention
  • 2B is a schematic diagram showing the reverse structure of a second electrode on the CF side of the first preferred embodiment of the PVA pixel electrode of the present invention
  • 3A is a schematic structural view of a first electrode on a TFT side of a second preferred embodiment of the PVA pixel electrode of the present invention.
  • 3B is a schematic diagram showing the reverse structure of a second electrode on the CF side of the second preferred embodiment of the PVA pixel electrode of the present invention.
  • FIG. 4A is a schematic structural view of a first electrode on a TFT side of a third preferred embodiment of the PVA pixel electrode of the present invention.
  • 4B is a schematic diagram showing the reverse structure of a second electrode on the CF side of a third preferred embodiment of the PVA pixel electrode of the present invention.
  • 5A is a simulation diagram of output of a PVA pixel electrode of the prior art
  • 5B is a diagram showing an output simulation of a first preferred embodiment of a PVA pixel electrode of the present invention.
  • 5C is a diagram showing an output simulation of a second preferred embodiment of the PVA pixel electrode of the present invention.
  • the PVA pixel The electrode includes a first electrode 210 on the TFT side and a second electrode 220 on the CF side, and is disposed on the first electrode 210 by an electric field applied on the first electrode 210 and the second electrode 220. And the orientation of the liquid crystal between the second electrode 220, wherein the shape of the first electrode 210 is """ or "", and the shape of the second electrode 220 corresponds to the shape of the first electrode 210 to divide the entire electrode into eight pieces.
  • a liquid crystal alignment of eight domains can be produced, so that the viewing angle characteristics of the liquid crystal display can be improved by the structure of one continuous domain.
  • the PVA pixel electrode of the present invention provides an ITO gap 230 of unequal length to the first electrode 210 at the edge boundary of the first electrode 210 and the second electrode 220 to improve the display quality of the pixel.
  • the reverse structure diagram of the second electrode on the CF side shown in FIG. 2B is the same as the reverse structure diagram of the second electrode on the CF side shown in FIG. 1B.
  • the structure of the first electrode on the TFT side shown in FIG. 2A is correspondingly improved, and the first electrode 210 of the corresponding position of the marked 6 points shown in FIG. 5A can be seen from the figure.
  • the structure is improved mainly by providing unequal length ITO gaps 230 at the edge junctions of the first electrode 210 and the second electrode 220, wherein the first electrode 210 is provided with an ITO gap 230 having a length difference of 1 um to 10 um.
  • Adding an ITO gap 230 at the edge boundary of the first electrode 210 can weaken the fringe field effect, and unequal extension of the ITO gap 230 at the edge junction, changing the distribution of the fringe field, so that the liquid crystal at the edge junction
  • the internal liquid crystal orientation is uniform, eliminating the adverse effect of the rotational displacement.
  • the elimination effect is shown in FIG. 5B.
  • the mark marked in FIG. 5B is compared with the mark marked in FIG. 5A, the dark lines are reduced, and the penetration rate is increased by 0.23%. .
  • the edge boundary of the first electrode 210 and the second electrode 220 are respectively located at the upper right, the lower right, and the left portion of the first electrode 210, and thus the first electrode 210 is disposed.
  • the ITO gaps 230 are also located in the upper right, lower right, and left portions of the first electrode 210.
  • the edge of the first electrode 210 and the second electrode 220 are respectively located at the upper left, the lower left, and the right of the first electrode 210, and the ITO of the first electrode 210 is disposed.
  • the gap 230 is also located at the upper left, lower left, and right middle of the first electrode 210.
  • the PVA pixel The electrode includes a first electrode 310 on the TFT side and a second electrode 320 on the CF side, and is disposed on the first electrode 310 by an electric field applied on the first electrode 310 and the second electrode 320.
  • the orientation of the liquid crystal between the second electrode 320 wherein the shape of the first electrode 310 is """ or "", and the shape of the second electrode 320 corresponds to the shape of the first electrode 310 to divide the entire electrode into eight pieces.
  • a liquid crystal alignment of eight domains can be produced, so that the viewing angle characteristics of the liquid crystal display can be improved by the structure of one continuous domain.
  • the PVA pixel electrode of the present invention increases the display quality of the pixel by providing the ITO gap 330 of the unequal length to the second electrode 320 at the edge boundary of the first electrode 310 and the second electrode 320.
  • the structural schematic diagram of the first electrode 310 on the TFT side shown in FIG. 3A is the same as the first electrode 310 on the TFT side shown in FIG. 1A.
  • the structure of the second electrode 320 on the CF side shown in Fig. 3B is correspondingly improved, and the structure of the second electrode 320 at the corresponding position of the marked 6 points shown in Fig. 5A can be seen from the figure.
  • Both have been modified, mainly to provide unequal length ITO gaps 330 at the edge intersections of the first electrode 310 and the second electrode 320, wherein the second electrode 320 is provided with a ITO gap 330 having a length difference of 1 um to 15 um.
  • the ITO gap 330 at the edge boundary is extended by unequal length, and the distribution of the fringe field is changed, so that the liquid crystal at the edge boundary is aligned with the internal liquid crystal orientation, and the adverse effect of the rotational displacement is eliminated.
  • the elimination effect is shown in Fig. 5C.
  • the mark marked in Fig. 5C is compared with the mark made in Fig. 5A, and the dark lines are alleviated, and the penetration rate is improved by 0.98%.
  • the edge boundary of the first electrode 310 and the second electrode 320 are respectively located at the upper right, the lower right, and the left portion of the first electrode 310, and thus the second electrode 320 is disposed.
  • the ITO gap 330 is also located in the upper right, lower right, and left portions of the second electrode 320.
  • the edge of the first electrode 310 and the second electrode 320 are respectively located at the upper left, lower left, and right portions of the first electrode 310, and the ITO of the second electrode 320 is disposed.
  • the gap 330 is also located at the upper left, lower left, and right middle of the second electrode 320.
  • the PVA pixel The electrode includes a first electrode 410 on the TFT side and a second electrode 420 on the CF side, and is disposed on the first electrode 410 by an electric field applied to the first electrode 410 and the second electrode 420. And the orientation of the liquid crystal between the second electrode 420, wherein the shape of the first electrode 410 is """ or "", and the shape of the second electrode 420 corresponds to the shape of the first electrode 410 to divide the entire electrode into eight pieces.
  • a liquid crystal alignment of eight domains can be produced, so that the viewing angle characteristics of the liquid crystal display can be improved by the structure of one continuous domain.
  • the PVA pixel electrode of the present invention provides unequal length ITO gap 430 to the first electrode 410 and the second electrode 420 at the edge boundary of the first electrode 410 and the second electrode 420 to improve the display quality of the pixel.
  • the first electrode 410 and the second electrode 420 are simultaneously improved in the present embodiment, a corresponding improvement is made to the structure of the first electrode on the TFT side shown in FIG. 4A, and the second side on the CF side shown in FIG. 4B.
  • the structure of the electrode is also improved accordingly. It can be seen from the figure that the structures of the first electrode 410 and the second electrode 420 of the corresponding positions of the marked six points shown in FIG. 5A are improved, mainly An ITO gap 430 of unequal length is disposed at an edge boundary of the first electrode 410 and the second electrode 420, wherein the ITO gap 430 disposed by the first electrode 410 has a length difference of 1 um to 10 um, and the ITO of the second electrode 420 is disposed.
  • the difference in length of the gap 430 is 1 um to 15 um, and the addition of the ITO gap 430 at the edge boundary of the first electrode 410 can weaken the fringe field effect, while the ITO gap 430 at the edge boundary of the first electrode 410 and the second electrode 420 is not
  • the extension of the equal length changes the distribution of the fringe field, so that the liquid crystal at the edge junction is aligned with the internal liquid crystal orientation, eliminating the adverse effect of the rotational displacement.
  • the edge intersection of the first electrode 410 and the second electrode 420 is respectively located at the upper right, the lower right, and the left of the electrode, and the first electrode 410
  • the ITO gaps 430 provided with the second electrode 420 are also located in the upper right, lower right, and left portions of the electrodes.
  • the boundary between the edges of the first electrode 410 and the second electrode 420 is respectively located at the upper left, lower left, and right portions of the electrode, and the first electrode 410
  • the ITO gap 430 provided with the second electrode 420 is also located in the upper left, lower left, and right portions of the electrode.
  • the present invention also relates to a liquid crystal display device comprising: a liquid crystal; a TFT for controlling the liquid crystal turning; a CF for displaying different colors on the display; and a PVA pixel electrode; the PVA pixel electrode comprising: on the TFT side a first electrode of the "" type or "" type; and a second electrode of the """ type or “” type corresponding to the first electrode on the CF side, by being applied to the first electrode and An electric field on the second electrode controls a direction of liquid crystal disposed between the first electrode and the second electrode, by the edge of the edge of the first electrode and the second electrode An electrode and/or the second electrode are provided with unequal lengths of ITO to improve the display quality of the pixel.
  • the length difference between adjacent ITO gap ends of the first electrode is 1 um to 10 um.
  • the length difference between adjacent ITO gap ends of the second electrode is 1 um to 15 um.
  • the first electrode is a """ type electrode
  • the ITO gap provided by the first electrode is located in the upper right, lower right, and left portions of the first electrode.
  • the first electrode is a ""-type electrode
  • the ITO gap provided by the first electrode is located at the upper left, lower left, and right middle of the first electrode.
  • the second electrode is a """ type electrode
  • the ITO gap provided by the second electrode is located in the upper right, lower right, and left portions of the second electrode.
  • the ITO gap provided by the second electrode is located at the upper left, lower left, and right portions of the second electrode.

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Abstract

一种PVA像素电极，包括：位于TFT侧的"》"型或"《"型的第一电极（210）；以及位于CF侧的与第一电极（210）相应的"》"型或"《"型的第二电极（220），通过施加在第一电极（210）和第二电极（220）上的电场控制设置在第一电极（210）和第二电极（220）之间的液晶的指向，其中通过在第一电极（210）和第二电极（220）的边缘交界处对第一电极（210）和/或第二电极（220）设置不等长的ITO间隙（230）以提高像素的显示质量。一种具有PVA像素电极的液晶显示装置，通过修改TFT侧或CF侧的边缘交界处的ITO间隙（230）消除边缘场效应以达到提高像素的穿透率和显示质量的效果。

Description

PVA像素电极及相应的液晶显示装置 技术领域
本发明涉及液晶显示领域，特别是涉及一种可提高像素的穿透率和显示质量的PVA像素电极及相应的液晶显示装置。
 背景技术
PVA（Patterned Vertical Alignment，图像垂直调整技术）作为液晶VA（Vertical Alignment，垂直调整技术）显示中的一种模式，其利用TFT（Thin film transistor，薄膜场效应管）和CF（彩色滤光片，color filter)）侧的图案形成的电场来控制液晶的指向，可以省去PI（polyimide）层的摩擦取向工艺。
传统上采用的“》”型或“《”型的PVA像素结构，如图1A和图1B所示，由于“》”型或“《”型PVA像素电极的边缘与内部结构的差异，导致PVA像素边缘电场分布异于内部，在液晶上产生边缘场效应，使得TFT和CF侧的“》”型或“《”型边缘的交接处产生旋转位移（disclination），影响像素的显示质量和降低像素的开口率，如图5A所示，图中做了标记的地方由于边缘场效应，液晶产生了旋转位移，使得像素出现暗纹，穿透率降低，影响像素的显示质量。
故，有必要提供一种PVA像素电极及相应的液晶显示装置，以解决现有技术所存在的问题。
 技术问题
本发明针对现有技术的PVA像素电极及相应的液晶显示装置的PVA像素在液晶上产生边缘场效应影响像素的显示质量和降低像素的开口率的缺陷，提供一种通过修改TFT侧或CF侧的边缘交界处的ITO（Indium-Tin Oxide，氧化铟锡)间隙消除边缘场效应以达到提高像素的穿透率和显示质量的效果的PVA像素电极及相应的液晶显示装置。
 技术解决方案
本发明的主要目的在于提供一种PVA像素电极，包括：位于TFT侧的“》”型或“《”型的第一电极；以及位于CF侧的与所述第一电极相应的“》”型或“《”型的第二电极，通过施加在所述第一电极和所述第二电极上的电场控制设置在所述第一电极和所述第二电极之间的液晶的指向，通过在所述第一电极和所述第二电极的边缘交界处对所述第一电极和/或所述第二电极设置不等长的ITO间隙以提高像素的显示质量；所述第一电极设置的相邻ITO间隙端的长度差为1um至10um；所述第二电极设置的相邻ITO间隙端的长度差为1um至15um；当所述第一电极和所述第二电极均为“》”型电极时，所述第一电极和所述第二电极设置的ITO间隙均位于电极的右上方、右下方以及左部中间；当所述第一电极和所述第二电极均为“《”型电极时，所述第一电极和所述第二电极设置的ITO间隙均位于电极的左上方、左下方以及右部中间。
本发明的主要目的还在于提供一种PVA像素电极，包括：位于TFT侧的“》”型或“《”型的第一电极；以及位于CF侧的与所述第一电极相应的“》”型或“《”型的第二电极，通过施加在所述第一电极和所述第二电极上的电场控制设置在所述第一电极和所述第二电极之间的液晶的指向，通过在所述第一电极和所述第二电极的边缘交界处对所述第一电极和/或所述第二电极设置不等长的ITO间隙以提高像素的显示质量。本发明的主要目的还在于提供一种液晶显示装置，包括：液晶；用于控制所述液晶转向的TFT；用于在显示器上显示不同颜色的CF；以及PVA像素电极；所述PVA像素电极包括：位于TFT侧的“》”型或“《”型的第一电极；以及位于CF侧的与所述第一电极相应的“》”型或“《”型的第二电极，通过施加在所述第一电极和所述第二电极上的电场控制设置在所述第一电极和所述第二电极之间的液晶的指向，通过在所述第一电极和所述第二电极的边缘交界处对所述第一电极和/或所述第二电极设置不等长的ITO间隙以提高像素的显示质量。
在本发明的一实施例中，所述第一电极设置的相邻ITO间隙端的长度差为1um至10um。
在本发明的一实施例中，所述第二电极设置的相邻ITO间隙端的长度差为1um至15um。
在本发明的一实施例中，当所述第一电极为“》”型电极时，所述第一电极设置的ITO间隙位于所述第一电极的右上方、右下方以及左部中间。
在本发明的一实施例中，当所述第一电极为“《”型电极时，所述第一电极设置的ITO间隙位于所述第一电极的左上方、左下方以及右部中间。
在本发明的一实施例中，当所述第二电极为“》”型电极时，所述第二电极设置的ITO间隙位于所述第二电极的右上方、右下方以及左部中间。
在本发明的一实施例中，当所述第二电极为“《”型电极时，所述第二电极设置的ITO间隙位于所述第二电极的左上方、左下方以及右部中间。
相较于现有的PVA像素电极及相应的液晶显示装置具有PVA像素在液晶上产生边缘场效应影响像素的显示质量和降低像素的开口率的问题，本发明的PVA像素电极及相应的液晶显示装置通过修改TFT侧或CF侧的边缘交界处的ITO间隙消除边缘场效应以达到提高像素的穿透率和显示质量的效果。
 有益效果
相较于现有的PVA像素电极及相应的液晶显示装置具有PVA像素在液晶上产生边缘场效应影响像素的显示质量和降低像素的开口率的问题，本发明的PVA像素电极及相应的液晶显示装置通过修改TFT侧或CF侧的边缘交界处的ITO间隙消除边缘场效应以达到提高像素的穿透率和显示质量的效果 。
附图说明
图1A为现有技术的PVA像素电极的位于TFT侧的第一电极的结构示意图；
图1B为现有技术的PVA像素电极的位于CF侧的第二电极的反向结构示意图；
图2A为本发明的PVA像素电极的第一优选实施例的位于TFT侧的第一电极的结构示意图；
图2B为本发明的PVA像素电极的第一优选实施例的位于CF侧的第二电极的反向结构示意图；
图3A为本发明的PVA像素电极的第二优选实施例的位于TFT侧的第一电极的结构示意图；
图3B为本发明的PVA像素电极的第二优选实施例的位于CF侧的第二电极的反向结构示意图；
图4A为本发明的PVA像素电极的第三优选实施例的位于TFT侧的第一电极的结构示意图；
图4B为本发明的PVA像素电极的第三优选实施例的位于CF侧的第二电极的反向结构示意图；
图5A为现有技术的PVA像素电极的输出模拟仿真图；
图5B为本发明的PVA像素电极的第一优选实施例的输出模拟仿真图；
图5C为本发明的PVA像素电极的第二优选实施例的输出模拟仿真图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
在图中，结构相似的单元是以相同标号表示。
作为本发明的第一优选实施例，在图2A和图2B所示的本发明的PVA像素电极的第一优选实施例的第一电极和第二电极的反向结构示意图中，所述PVA像素电极包括第一电极210和第二电极220，第一电极210位于TFT侧，第二电极220位于CF侧，通过施加在第一电极210和第二电极220上的电场控制设置在第一电极210和第二电极220之间的液晶的指向，其中第一电极210的形状为“》”型或“《”型，第二电极220与第一电极210的形状相应以将整个电极分为八块可产生八个畴的液晶排列，从而可通过一个连续畴的结构改善液晶显示器的视角特性。其中本发明的PVA像素电极通过在第一电极210和第二电极220的边缘交界处对第一电极210设置不等长的ITO间隙230以提高像素的显示质量。
由于本实施例只对第一电极210做了改进，因而图2B所示的位于CF侧的第二电极的反向结构示意图与图1B所示的CF侧的第二电极的反向结构示意图相同，而图2A所示的位于TFT侧的第一电极的结构做出了相应的改进，从图中可以看出图5A所示的做了标记的6个点的相应位置的第一电极210的结构都进行了改进，主要是对第一电极210和第二电极220的边缘交界处的设置了不等长的ITO间隙230，其中第一电极210设置的ITO间隙230的长度差为1um至10um，在第一电极210的边缘交界处添加ITO间隙230可以削弱边缘场效应，而对边缘交界处的ITO间隙230做不等长的延伸，改变了边缘场的分布，使得边缘交界处的液晶与内部的液晶取向一致，消除了旋转位移的不利效果，消除效果如图5B所示，图5B所做标记之处与图5A所做标记之处对比，暗纹减轻，穿透率提高了0.23%。
当第一电极210为“》”型电极时，第一电极210与第二电极220的边缘交界处分别位于第一电极210的右上方、右下方以及左部中间，因此第一电极210设置的ITO间隙230也就位于第一电极210的右上方、右下方以及左部中间。当第一电极210为“《”型电极时，第一电极210与第二电极220的边缘交界处分别位于第一电极210的左上方、左下方以及右部中间，第一电极210设置的ITO间隙230也就位于第一电极210的左上方、左下方以及右部中间。
作为本发明的第二优选实施例，在图3A和图3B所示的本发明的PVA像素电极的第二优选实施例的第一电极和第二电极的反向结构示意图中，所述PVA像素电极包括第一电极310和第二电极320，第一电极310位于TFT侧，第二电极320位于CF侧，通过施加在第一电极310和第二电极320上的电场控制设置在第一电极310和第二电极320之间的液晶的指向，其中第一电极310的形状为“》”型或“《”型，第二电极320与第一电极310的形状相应以将整个电极分为八块可产生八个畴的液晶排列，从而可通过一个连续畴的结构改善液晶显示器的视角特性。其中本发明的PVA像素电极通过在第一电极310和第二电极320的边缘交界处对第二电极320设置不等长的ITO间隙330以提高像素的显示质量。
由于本实施例只对第二电极320做了改进，因而图3A所示的位于TFT侧的第一电极310的结构示意图与图1A所示的TFT侧的第一电极310的结构示意图相同，而图3B所示的位于CF侧的第二电极320的结构做出了相应的改进，从图中可以看出图5A所示的做了标记的6个点的相应位置的第二电极320的结构都进行了改进，主要是对第一电极310和第二电极320的边缘交界处的设置了不等长的ITO间隙330，其中第二电极320设置的ITO间隙330的长度差为1um至15um，对边缘交界处的ITO间隙330做不等长的延伸，改变了边缘场的分布，使得边缘交界处的液晶与内部的液晶取向一致，消除了旋转位移的不利效果。消除效果如图5C所示，图5C所做标记之处与图5A所做标记之处对比，暗纹减轻，穿透率提高了0.98%。
当第二电极320为“》”型电极时，第一电极310与第二电极320的边缘交界处分别位于第一电极310的右上方、右下方以及左部中间，因此第二电极320设置的ITO间隙330也就位于第二电极320的右上方、右下方以及左部中间。当第二电极320为“《”型电极时，第一电极310与第二电极320的边缘交界处分别位于第一电极310的左上方、左下方以及右部中间，第二电极320设置的ITO间隙330也就位于第二电极320的左上方、左下方以及右部中间。
作为本发明的第三优选实施例，在图4A和图4B所示的本发明的PVA像素电极的第三优选实施例的第一电极和第二电极的反向结构示意图中，所述PVA像素电极包括第一电极410和第二电极420，第一电极410位于TFT侧，第二电极420位于CF侧，通过施加在第一电极410和第二电极420上的电场控制设置在第一电极410和第二电极420之间的液晶的指向，其中第一电极410的形状为“》”型或“《”型，第二电极420与第一电极410的形状相应以将整个电极分为八块可产生八个畴的液晶排列，从而可通过一个连续畴的结构改善液晶显示器的视角特性。其中本发明的PVA像素电极通过在第一电极410和第二电极420的边缘交界处对第一电极410和第二电极420设置不等长的ITO间隙430以提高像素的显示质量。
由于本实施例对第一电极410和第二电极420同时进行了改进，图4A所示的位于TFT侧的第一电极的结构做出的相应改进，图4B所示的位于CF侧的第二电极的结构也做出的相应改进，从图中可以看出图5A所示的做了标记的6个点的相应位置的第一电极410和第二电极420的结构都进行了改进，主要是对第一电极410和第二电极420的边缘交界处的设置了不等长的ITO间隙430，其中第一电极410设置的ITO间隙430的长度差为1um至10um，第二电极420设置的ITO间隙430的长度差为1um至15um，在第一电极410的边缘交界处添加ITO间隙430可以削弱边缘场效应，而对第一电极410和第二电极420的边缘交界处的ITO间隙430做不等长的延伸，改变了边缘场的分布，使得边缘交界处的液晶与内部的液晶取向一致，消除了旋转位移的不利效果。
当第一电极410和第二电极420均为“》”型电极时，第一电极410与第二电极420的边缘交界处分别位于电极的右上方、右下方以及左部中间，第一电极410和第二电极420设置的ITO间隙430也就均位于电极的右上方、右下方以及左部中间。当第一电极410和第二电极420均为“《”型电极时，第一电极410与第二电极420的边缘交界处分别位于电极的左上方、左下方以及右部中间，第一电极410和第二电极420设置的ITO间隙430也就位于电极的左上方、左下方以及右部中间。
本发明还涉及一种液晶显示装置，包括液晶；用于控制所述液晶转向的TFT；用于在显示器上显示不同颜色的CF；以及PVA像素电极；所述PVA像素电极包括：位于TFT侧的“》”型或“《”型的第一电极；以及位于CF侧的与所述第一电极相应的“》”型或“《”型的第二电极，通过施加在所述第一电极和所述第二电极上的电场控制设置在所述第一电极和所述第二电极之间的液晶的指向，通过在所述第一电极和所述第二电极的边缘交界处对所述第一电极和/或所述第二电极设置不等长的ITO间隙以提高像素的显示质量。所述第一电极设置的相邻ITO间隙端的长度差为1um至10um。所述第二电极设置的相邻ITO间隙端的长度差为1um至15um。当所述第一电极为“》”型电极时，所述第一电极设置的ITO间隙位于所述第一电极的右上方、右下方以及左部中间。当所述第一电极为“《”型电极时，所述第一电极设置的ITO间隙位于所述第一电极的左上方、左下方以及右部中间。当所述第二电极为“》”型电极时，所述第二电极设置的ITO间隙位于所述第二电极的右上方、右下方以及左部中间。当所述第二电极为“《”型电极时，所述第二电极设置的ITO间隙位于所述第二电极的左上方、左下方以及右部中间。本发明的液晶显示装置的有益效果和具体实施方式与上述的PVA像素电极的具体实施例相同或相似，具体请参见上述的PVA像素电极的具体实施例。
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。
 本发明的实施方式
工业实用性
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Claims (15)

  1. 一种PVA像素电极，包括：
    位于TFT侧的“》”型或“《”型的第一电极；以及
    位于CF侧的与所述第一电极相应的“》”型或“《”型的第二电极，通过施加在所述第一电极和所述第二电极上的电场控制设置在所述第一电极和所述第二电极之间的液晶的指向，其特征在于，通过在所述第一电极和所述第二电极的边缘交界处对所述第一电极和/或所述第二电极设置不等长的ITO间隙以提高像素的显示质量；
    所述第一电极设置的相邻ITO间隙端的长度差为1um至10um；所述第二电极设置的相邻ITO间隙端的长度差为1um至15um；
    当所述第一电极和所述第二电极均为“》”型电极时，所述第一电极和所述第二电极设置的ITO间隙均位于电极的右上方、右下方以及左部中间；
    当所述第一电极和所述第二电极均为“《”型电极时，所述第一电极和所述第二电极设置的ITO间隙均位于电极的左上方、左下方以及右部中间。
  2. 一种PVA像素电极，包括：
    位于TFT侧的“》”型或“《”型的第一电极；以及
    位于CF侧的与所述第一电极相应的“》”型或“《”型的第二电极，通过施加在所述第一电极和所述第二电极上的电场控制设置在所述第一电极和所述第二电极之间的液晶的指向，其特征在于，通过在所述第一电极和所述第二电极的边缘交界处对所述第一电极和/或所述第二电极设置不等长的ITO间隙以提高像素的显示质量。
  3. 根据权利要求2所述的PVA像素电极，其特征在于，所述第一电极设置的相邻ITO间隙端的长度差为1um至10um。
  4. 根据权利要求2所述的PVA像素电极，其特征在于，所述第二电极设置的相邻ITO间隙端的长度差为1um至15um。
  5. 根据权利要求2所述的PVA像素电极，其特征在于，当所述第一电极为“》”型电极时，所述第一电极设置的ITO间隙位于所述第一电极的右上方、右下方以及左部中间。
  6. 根据权利要求2所述的PVA像素电极，其特征在于，当所述第一电极为“《”型电极时，所述第一电极设置的ITO间隙位于所述第一电极的左上方、左下方以及右部中间。
  7. 根据权利要求2所述的PVA像素电极，其特征在于，当所述第二电极为“》”型电极时，所述第二电极设置的ITO间隙位于所述第二电极的右上方、右下方以及左部中间。
  8. 根据权利要求2所述的PVA像素电极，其特征在于，当所述第二电极为“《”型电极时，所述第二电极设置的ITO间隙位于所述第二电极的左上方、左下方以及右部中间。
  9. 一种液晶显示装置，其特征在于，包括
    液晶；
    用于控制所述液晶转向的TFT；
    用于在显示器上显示不同颜色的CF；以及
    PVA像素电极；
    所述PVA像素电极包括：
    位于TFT侧的“》”型或“《”型的第一电极；以及
    位于CF侧的与所述第一电极相应的“》”型或“《”型的第二电极，通过施加在所述第一电极和所述第二电极上的电场控制设置在所述第一电极和所述第二电极之间的液晶的指向，其特征在于，通过在所述第一电极和所述第二电极的边缘交界处对所述第一电极和/或所述第二电极设置不等长的ITO间隙以提高像素的显示质量。
  10. 根据权利要求9所述的液晶显示装置，其特征在于，所述第一电极设置的相邻ITO间隙端的长度差为1um至10um。
  11. 根据权利要求9所述的液晶显示装置，其特征在于，所述第二电极设置的相邻ITO间隙端的长度差为1um至15um。
  12. 根据权利要求9所述的液晶显示装置，其特征在于，当所述第一电极为“》”型电极时，所述第一电极设置的ITO间隙位于所述第一电极的右上方、右下方以及左部中间。
  13. 根据权利要求9所述的液晶显示装置，其特征在于，当所述第一电极为“《”型电极时，所述第一电极设置的ITO间隙位于所述第一电极的左上方、左下方以及右部中间。
  14. 根据权利要求9所述的液晶显示装置，其特征在于，当所述第二电极为“》”型电极时，所述第二电极设置的ITO间隙位于所述第二电极的右上方、右下方以及左部中间。
  15. 根据权利要求9所述的液晶显示装置，其特征在于，当所述第二电极为“《”型电极时，所述第二电极设置的ITO间隙位于所述第二电极的左上方、左下方以及右部中间。
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