WO2014023046A1 - 增快液晶反应速度的画素结构 - Google Patents

增快液晶反应速度的画素结构 Download PDF

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Publication number
WO2014023046A1
WO2014023046A1 PCT/CN2012/080482 CN2012080482W WO2014023046A1 WO 2014023046 A1 WO2014023046 A1 WO 2014023046A1 CN 2012080482 W CN2012080482 W CN 2012080482W WO 2014023046 A1 WO2014023046 A1 WO 2014023046A1
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Prior art keywords
electrode
thin film
film transistor
pixel
liquid crystal
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PCT/CN2012/080482
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English (en)
French (fr)
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林家强
侯鸿龙
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深圳市华星光电技术有限公司
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Priority to US13/699,726 priority Critical patent/US9140946B2/en
Publication of WO2014023046A1 publication Critical patent/WO2014023046A1/zh
Priority to US14/824,064 priority patent/US9785025B2/en

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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
    • G02F1/136—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
    • G02F1/13624—Active matrix addressed cells having more than one switching element per pixel
    • 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
    • G02F1/134363—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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
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    • G02F1/13454—Drivers integrated on the active matrix substrate
    • 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
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    • 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
    • G02F1/136—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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data 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
    • G02F1/133397—Constructional arrangements; Manufacturing methods for suppressing after-image or image-sticking
    • 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
    • G02F1/134381—Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/043—Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0252—Improving the response speed

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a pixel structure for increasing the reaction speed of a liquid crystal. Background technique
  • a liquid crystal display or LCD (Liquid Crystal Display) is a flat, ultra-thin display device consisting of a number of colored or black-and-white pixels placed in front of a light source or reflection.
  • LCD monitors are low power consumption and are therefore favored by engineers for use in battery-operated electronic devices. Its main principle is to stimulate the liquid crystal molecules to generate dots, lines and faces to match the back lamp.
  • the response time of 40ms becomes a hurdle, and a display of more than 40ms will have a significant "tailing" or “afterimage” phenomenon. Therefore, the first consideration when purchasing LCD monitors or LCD TVs is the response time of the LCD.
  • the so-called response time is the speed at which each pixel of the liquid crystal display reacts to the input signal, that is, the time required for the pixel to turn from dark to bright or from bright to dark. We often say that 25ms, 16ms refers to this response time. The smaller the response time, the less the user will feel the tail shadow when watching the dynamic picture.
  • the principle is to apply a voltage in the liquid crystal cell to twist and recover the liquid crystal molecules. Please refer to FIG. 1A to FIG.
  • 1C which are schematic diagrams of the torsion state of the liquid crystal under strong and weak electric fields: when the electric field is a strong electric field, the liquid crystal is in a state close to horizontal, and the picture is bright; when the electric field is a weak electric field or a zero electric field, the liquid crystal appears close to In the vertical state, the picture is dark at this time.
  • the determinants that affect the response time of liquid crystals can be divided into two categories:
  • Liquid crystal material liquid crystal thickness in liquid crystal cell, liquid crystal dielectric constant, liquid crystal viscosity coefficient, liquid crystal elastic coefficient;
  • the object of the present invention is to provide a pixel structure for increasing the reaction speed of a liquid crystal.
  • an electric field is applied to increase the conversion speed, thereby increasing the liquid crystal reaction speed and improving the liquid crystal.
  • the residual phenomenon of 3D images is to provide a pixel structure for increasing the reaction speed of a liquid crystal.
  • the present invention provides a pixel structure for increasing the reaction speed of a liquid crystal, comprising: a first thin film transistor, a second thin film transistor, an upper substrate, a lower substrate disposed opposite to the upper substrate, and disposed on the lower substrate a pixel electrode, a common electrode disposed on the upper substrate, and a boosting electrode disposed on the lower substrate, the boosting electrode being disposed between each two pixel electrodes, the first thin film transistor having a first drain and a first source And the second thin film transistor has a second drain, a second source and a second gate, wherein the pixel electrode is electrically connected to the second drain, the boosting electrode and the first drain Extremely electrical connection.
  • the first and second thin film transistors control the pixel electrode and the boosting electrode to have a certain voltage difference for a certain period of time.
  • the method further includes: a first source driver, a first gate driver, a second source driver, and a second gate driver, wherein the first source driver is electrically connected to the first source of the first thin film transistor, The second source driver is electrically connected to the second source of the second thin film transistor, the first gate driver is electrically connected to the first gate of the first thin film transistor, and the second gate driver and the second The second gate of the thin film transistor is electrically connected.
  • the pixel electrode has a first connection substrate, and the pixel electrodes are distributed in a comb shape on the first connection substrate.
  • the boosting electrode has a second connecting substrate, and the boosting electrode is distributed in a comb shape on the second connecting substrate.
  • the boosting electrode and the pixel electrode are alternately distributed.
  • a booster electrode is disposed between each of the two pixel electrodes.
  • Two pixel electrodes are disposed between each of the two boosting electrodes.
  • liquid crystal layer disposed between the upper and lower substrates.
  • the present invention also provides a pixel structure for increasing the reaction speed of a liquid crystal, comprising: a first thin film transistor, a second thin film transistor, an upper substrate, a lower substrate disposed opposite to the upper substrate, a pixel electrode disposed on the lower substrate, a common electrode disposed on the upper substrate and a boosting electrode disposed on the lower substrate, the boosting electrode being disposed between each two pixel electrodes, the first thin film transistor having a first drain, a first source, and a first a second thin film transistor having a second drain and a second source a pole and a second gate, wherein the pixel electrode is electrically connected to the second drain, and the boosting electrode is electrically connected to the first drain;
  • the first and second thin film transistors control the pixel electrode and the boosting electrode to have a certain voltage difference for a certain period of time;
  • the method further includes: a first source driver, a first gate driver, a second source driver, and a second gate driver, wherein the first source driver is electrically connected to the first source of the first thin film transistor, The second source driver is electrically connected to the second source of the second thin film transistor, the first gate driver is electrically connected to the first gate of the first thin film transistor, and the second gate driver and the second The second gate of the thin film transistor is electrically connected;
  • the pixel electrode has a first connection substrate, and the pixel electrodes are distributed in a comb shape on the first connection substrate;
  • the boosting electrode has a second connecting substrate, and the boosting electrode is distributed in a comb shape on the second connecting substrate;
  • the boosting electrode and the pixel electrode are alternately distributed;
  • a boosting electrode is disposed between each of the two pixel electrodes
  • liquid crystal layer disposed between the upper and lower substrates.
  • the pixel structure for increasing the reaction speed of the liquid crystal of the present invention has a certain voltage difference in a certain period of time by adding a boosting electrode on the lower substrate and using the timing of the driving voltage to make the assisting electrode and the pixel electrode have a certain voltage difference for a certain period of time.
  • a side electric field is provided, the electric field is assisted, and the conversion speed is increased, thereby increasing the liquid crystal reaction speed, which can well improve the image sticking phenomenon of the 3D image.
  • 1A is a schematic view showing a state of liquid crystal molecules in a strong electric field of a conventional pixel structure
  • 1B is a schematic view showing the state of liquid crystal molecules in a weak electric field of a conventional pixel structure
  • 1C is a schematic view showing the state of liquid crystal molecules in a zero electric field of a conventional pixel structure
  • 2 is a schematic structural view of an upper and lower substrate, a boosting electrode and a pixel electrode in a pixel structure for increasing the reaction speed of a liquid crystal according to the present invention
  • 3 is a schematic view showing a connection structure of a thin film transistor, a boosting electrode and a pixel electrode in an embodiment of a pixel structure for increasing the reaction speed of a liquid crystal according to the present invention
  • FIG. 4 is a timing chart of signals of a pixel structure for increasing the reaction speed of a liquid crystal according to the present invention
  • FIG. 5 is a schematic diagram showing a connection structure of a thin film transistor, a booster electrode and a pixel electrode in another embodiment of the pixel structure for increasing the reaction speed of the liquid crystal according to the present invention.
  • the present invention provides a pixel structure for increasing the reaction speed of a liquid crystal, comprising: a first thin film transistor 22, a second thin film transistor 24, an upper substrate 2, and a lower substrate disposed opposite to the upper substrate 2. 7.
  • the first thin film transistor 22 has a first drain D, a first source S and a first gate G
  • the second thin film transistor 24 has a second drain D, a second source S and a second gate.
  • the pixel electrode 8 is electrically connected to the second drain D
  • the boosting electrode 9 is electrically connected to the first drain D.
  • the first and second thin film transistors 22 and 24 are connected.
  • the pixel element 8 and the booster electrode 9 are controlled to have a certain voltage difference for a certain period of time.
  • the pixel structure for increasing the liquid crystal reaction speed of the present invention further comprises a liquid crystal layer 6 disposed between the upper and lower substrates 2, 7.
  • the present invention provides a lateral electric field 10 by using the boosting electrode 9 without changing the existing liquid crystal material and the alignment material, and the liquid crystal molecules 62 are shifted to a high voltage of the pixel electrode (the liquid crystal molecules 62 are close to the horizontal level).
  • the liquid crystal molecules 62 are assisted to increase the reaction speed at which the liquid crystal molecules 62 are switched from the horizontal state to the more vertical state.
  • the pixel structure for increasing the liquid crystal reaction speed of the present invention further includes: a first source driver 14, a first gate driver 12, a second source driver 18, and a second gate driver 16, the first source driver 14 and The first source S of the first thin film transistor 22 is electrically connected to the second source S of the second thin film transistor 24, and the first gate driver 12 and the first The first gate G of the thin film transistor 22 is electrically connected, and the second gate driver 16 is electrically connected to the second gate G of the second thin film transistor 24.
  • the electrode 9 and the pixel electrode 8 electrically connected to the second drain D have the same or different driving voltages at the same time, so that the pixel electrode 8 and the boosting electrode 9 obtain a certain voltage difference for a period of time (see FIG. 4). Place Shown, using the matching of the driving voltage timing to achieve the purpose of assisting the twisting of the liquid crystal molecules 62 within a certain period of time.
  • the pixel electrode 8 has a first connection substrate 82, and the pixel electrodes 8 are distributed in a comb shape on the first connection substrate 82.
  • the boosting electrode 9 has a second connecting substrate 92, and the boosting electrodes 9 are distributed in a comb shape on the second connecting substrate 92.
  • the booster electrode 9 and the pixel electrode 8 are alternately distributed.
  • a booster electrode 9 is disposed between each of the two pixel electrodes 8.
  • two pixel electrodes 8 are disposed between each of the two boosting electrodes 9.
  • the present invention provides a pixel structure for increasing the reaction speed of a liquid crystal.
  • the boosting electrode and the pixel electrode have a certain voltage difference for a certain period of time.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Geometry (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种增快液晶反应速度的画素结构，包括：第一薄膜晶体管（22）、第二薄膜晶体管（24）、上基板（2）、与所述上基板（2）相对设置的下基板（7）、设于下基板（7）上的画素电极（8）、设于上基板（2）上的共同电极（4）及设于下基板（7）上的助力电极（9），所述助力电极（9）设于每两画素电极（8）之间，所述第一薄膜晶体管（22）具有第一漏极（D）、第一源极（S）及第一栅极（G），所述第二薄膜晶体管（24）具有第二漏极（D）、第二源极（S）及第二栅极（G），所述画素电极（8）与第二漏极（D）电性连接，所述助力电极（9）与第一漏极（D）电性连接。通过在下基板（7）上加入助力电极（9），使得助力电极（9）与画素电极（8）一定时间内具有一定的电压差，从而在当液晶（6）从较水平状态转换为垂直状态时提供一侧向电场（10），给予电场助力，增快液晶（6）反应速度，能够很好地改善3D影像的残影现象。

Description

增快液晶反应速度的画素结构 技术领域
本发明涉及液晶显示领域， 尤其涉及一种增快液晶反应速度的画素结 构。 背景技术
液晶显示器， 或称 LCD ( Liquid Crystal Display ) , 为平面超薄的显 示设备， 它由一定数量的彩色或黑白像素组成， 放置于光源或者反射面前 方。 液晶显示器功耗很低， 因此倍受工程师青睐， 适用于使用电池的电子 设备。 它的主要原理是以电流刺激液晶分子产生点、 线、 面配合背部灯管 构成画面。
大家知道， 人眼存在 "视觉残留" 的现象， 也就是高速运动的画面在 人脑中会形成短暂的印象。 动画片、 电影等一直到现在最新的游戏正是应 用了视觉残留的原理， 让一系列渐变的图像在人眼前快速连续显示， 便形 成动态的影像。 人能够接受的画面显示速度一般为每秒 24 张， 这也是电 影每秒 24 帧播放速度的由来， 如果显示速度低于这一标准， 人就会明显 感到画面的停顿和不适。 按照这一指标计算， 每张画面显示的时间需要小 于 40ms。 这样， 对于液晶显示器来说， 响应时间 40ms就成了一道坎， 高 于 40ms 的显示器便会出现明显的 "拖尾" 或者 "残影" 现象。 因此， 人 们在选购液晶显示器或液晶电视时第一考虑要素就是液晶的响应时间。
所谓响应时间是液晶显示器各像素点对输入信号反应的速度， 即像素 由暗转亮或由亮转暗所需要的时间。 我们常说的 25ms、 16ms 就是指的这 个响应时间。 响应时间越小则使用者在看动态画面时越不会有尾影拖拽的 感觉。 其原理是在液晶盒内施加电压， 使液晶分子扭转与回复。 请参阅图 1A 至 1C, 为液晶在强弱电场下的扭转状态示意图： 电场为强电场时， 液 晶呈现接近水平的状态， 此时画面为亮； 电场为弱电场或零电场时， 液晶 呈现接近垂直的状态， 此时画面为暗。
影响液晶的响应时间的决定因子可分为两类：
1、 液晶材料： 在液晶盒内的液晶厚度， 液晶介电系数， 液晶粘滞系 数， 液晶弹性系数；
2、 液晶与外力的作用： 液晶外加电场的大小， 配向层的配向力。 随着技术的日新月异， LCD技术也在不断发展进步。 如何进一步降低 液晶的响应速度从而在 LCD 行业中处于不败之地已成为液晶显示器发展 的重大研究课题。 发明内容
本发明的目的在于提供一种增快液晶反应速度的画素结构， 当液晶从 较水平状态转换为垂直状态时给予一电场助力， 增快转换速度， 从而增快 液晶反应速度， 能够很好地改善 3D影像的残影现象。
为实现上述目的， 本发明提供一种增快液晶反应速度的画素结构， 包 括： 第一薄膜晶体管、 第二薄膜晶体管、 上基板、 与所述上基板相对设置 的下基板、 设于下基板上的画素电极、 设于上基板上的共同电极及设于下 基板上的助力电极， 所述助力电极设于每两画素电极之间， 所述第一薄膜 晶体管具有第一漏极、 第一源极及第一栅极， 所述第二薄膜晶体管具有第 二漏极、 第二源极及第二栅极， 所述画素电极与第二漏极电性连接， 所述 助力电极与第一漏极电性连接。
所述第一、 第二薄膜晶体管控制画素电极与助力电极在一定的时间段 具有一定的电压差。
还包括： 第一源极驱动器、 第一栅极驱动器、 第二源极驱动器及第二 栅极驱动器， 所述第一源极驱动器与第一薄膜晶体管的第一源极电性连 接， 所述第二源极驱动器与第二薄膜晶体管的第二源极电性连接， 所述第 一栅极驱动器与第一薄膜晶体管的第一栅极电性连接， 所述第二栅极驱动 器与第二薄膜晶体管的第二栅极电性连接。
所述画素电极具有一第一连接基板， 所述画素电极在所述第一连接基 板上呈梳状分布。
所述助力电极具有一第二连接基板， 所述助力电极在所述第二连接基 板上呈梳状分布。
所述助力电极与所述画素电极交替分布。
所述每两根画素电极之间设有一根助力电极。
所述每两根助力电极之间设有两根画素电极。
还包括设于上下基板之间的液晶层。
本发明还提供一种增快液晶反应速度的画素结构， 包括： 第一薄膜晶 体管、 第二薄膜晶体管、 上基板、 与所述上基板相对设置的下基板、 设于 下基板上的画素电极、 设于上基板上的共同电极及设于下基板上的助力电 极， 所述助力电极设于每两画素电极之间， 所述第一薄膜晶体管具有第一 漏极、 第一源极及第一栅极， 所述第二薄膜晶体管具有第二漏极、 第二源 极及第二栅极， 所述画素电极与第二漏极电性连接， 所述助力电极与第一 漏极电性连接；
其中， 所述第一、 第二薄膜晶体管控制画素电极与助力电极在一定的 时间段具有一定的电压差；
还包括： 第一源极驱动器、 第一栅极驱动器、 第二源极驱动器及第二 栅极驱动器， 所述第一源极驱动器与第一薄膜晶体管的第一源极电性连 接， 所述第二源极驱动器与第二薄膜晶体管的第二源极电性连接， 所述第 一栅极驱动器与第一薄膜晶体管的第一栅极电性连接， 所述第二栅极驱动 器与第二薄膜晶体管的第二栅极电性连接；
其中， 所述画素电极具有一第一连接基板， 所述画素电极在所述第一 连接基板上呈梳状分布；
其中， 所述助力电极具有一第二连接基板， 所述助力电极在所述第二 连接基板上呈梳状分布；
其中， 所述助力电极与所述画素电极交替分布；
其中， 所述每两根画素电极之间设有一根助力电极；
还包括设于上下基板之间的液晶层。
本发明的有益效果： 本发明增快液晶反应速度的画素结构通过在下基 板上加入助力电极， 并利用趋动电压时序配合使得助力电极与画素电极一 定时间内具有一定的电压差， 从而在当液晶从较水平状态转换为垂直状态 时提供一侧向电场， 给予电场助力， 增快转换速度， 从而增快液晶反应速 度， 能够很好地改善 3D影像的残影现象。
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 1A为现有画素结构强电场下的液晶分子状态示意图；
图 1B为现有画素结构弱电场下的液晶分子状态示意图；
图 1C为现有画素结构零电场下的液晶分子状态示意图；
图 2为本发明增快液晶反应速度的画素结构中上下基板、 助力电极及 画素电极结构示意图； 图 3 为本发明增快液晶反应速度的画素结构一实施例中薄膜晶体管与 助力电极及画素电极连接结构示意图；
图 4为本发明增快液晶反应速度的画素结构各信号的时序图； 图 5 为本发明增快液晶反应速度的画素结构另一实施例中薄膜晶体管 与助力电极及画素电极连接结构示意图。 具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果， 以下结合本发明 的优选实施例及其附图进行详细描述。
请参阅图 2至 4, 本发明提供一种增快液晶反应速度的画素结构， 包 括： 第一薄膜晶体管 22、 第二薄膜晶体管 24、 上基板 2、 与所述上基板 2 相对设置的下基板 7、 设于下基板 7上的画素电极 8、 设于上基板 2上的 共同电极 4及设于下基板 7上的助力电极 9, 所述助力电极 9设于每两画 素电极 8之间， 所述第一薄膜晶体管 22具有第一漏极 D、 第一源极 S及 第一栅极 G, 所述第二薄膜晶体管 24具有第二漏极 D、 第二源极 S及第 二栅极 G, 所述画素电极 8与第二漏极 D电性连接， 所述助力电极 9与第 一漏极 D电性连接， 如图 4所示， 所述第一、 第二薄膜晶体管 22、 24控 制画素电极 8与助力电极 9在一定的时间段具有一定的电压差。
本发明增快液晶反应速度的画素结构还包括设于上、 下基板 2、 7 之 间的液晶层 6。 本发明在不改变现有液晶材料以及配向材料的情况下， 利 用所述助力电极 9提供一侧向电场 10, 在液晶分子 62要向画素电极高电 压趋动 （液晶分子 62接近水平）转换至低电压趋动 （液晶分子 62接近垂 直） 时， 给液晶分子 62提供助力， 以增快液晶分子 62从较水平状态转换 为较垂直状态的反应速度。
本发明增快液晶反应速度的画素结构还包括： 第一源极驱动器 14、 第 一栅极驱动器 12、 第二源极驱动器 18及第二栅极驱动器 16, 所述第一源 极驱动器 14与第一薄膜晶体管 22的第一源极 S电性连接， 所述第二源极 驱动器 18与第二薄膜晶体管 24的第二源极 S电性连接， 所述第一栅极驱 动器 12与第一薄膜晶体管 22的第一栅极 G电性连接， 所述第二栅极驱动 器 16与第二薄膜晶体管 24的第二栅极 G电性连接。 通过第一、 第二源极 驱动器 14、 18及第一、 第二栅极驱动器 12、 16来驱动第一、 第二薄膜晶 体管 22、 24, 使得电性接于第一漏极 D上的助力电极 9及电性接于第二 漏极 D上的画素电极 8在同一时间具有相同或不同的驱动电压， 从而使得 画素电极 8 与助力电极 9 在一段时间内获得一定的电压差 （如图 4 所 示） ， 利用趋动电压时序的配合达到在一定时间内给液晶分子 62 扭转提 供助力的目的。
所述画素电极 8具有一第一连接基板 82, 所述画素电极 8在所述第一 连接基板 82上呈梳状分布。 所述助力电极 9具有一第二连接基板 92, 所 述助力电极 9在所述第二连接基板 92上呈梳状分布。
在本较佳实施例中， 所述助力电极 9与所述画素电极 8交替分布。 优 选， 所述每两根画素电极 8之间设有一根助力电极 9。
请参阅图 5 , 作为可供选择的另一较佳实施例， 所述每两根助力电极 9，之间设有两根画素电极 8，。
综上所述， 本发明提供一种增快液晶反应速度的画素结构， 通过在下 基板上加入助力电极， 并利用趋动电压时序配合使得助力电极与画素电极 一定时间内具有一定的电压差， 从而在当液晶从较水平状态转换为垂直状 态时提供一侧向电场， 给予电场助力， 增快转换速度， 从而增快液晶反应 速度， 能够很好地改善 3D影像的残影现象。
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

权 利 要 求
1、 一种增快液晶反应速度的画素结构， 包括： 第一薄膜晶体管、 第 二薄膜晶体管、 上基板、 与所述上基板相对设置的下基板、 设于下基板上 的画素电极、 设于上基板上的共同电极及设于下基板上的助力电极， 所述 助力电极设于每两画素电极之间， 所述第一薄膜晶体管具有第一漏极、 第 一源极及第一栅极， 所述第二薄膜晶体管具有第二漏极、 第二源极及第二 栅极， 所述画素电极与第二漏极电性连接， 所述助力电极与第一漏极电性 连接。
2、 如权利要求 1 所述的增快液晶反应速度的画素结构， 其中， 所述 第一、 第二薄膜晶体管控制画素电极与助力电极在一定的时间段具有一定 的电压差。
3、 如权利要求 1 所述的增快液晶反应速度的画素结构， 还包括： 第 一源极驱动器、 第一栅极驱动器、 第二源极驱动器及第二栅极驱动器， 所 述第一源极驱动器与第一薄膜晶体管的第一源极电性连接， 所述第二源极 驱动器与第二薄膜晶体管的第二源极电性连接， 所述第一栅极驱动器与第 一薄膜晶体管的第一栅极电性连接， 所述第二栅极驱动器与第二薄膜晶体 管的第二栅极电性连接。
4、 如权利要求 1 所述的增快液晶反应速度的画素结构， 其中， 所述 画素电极具有一第一连接基板， 所述画素电极在所述第一连接基板上呈梳 状分布。
5、 如权利要求 1 所述的增快液晶反应速度的画素结构， 其中， 所述 助力电极具有一第二连接基板， 所述助力电极在所述第二连接基板上呈梳 状分布。
6、 如权利要求 1 所述的增快液晶反应速度的画素结构， 其中， 所述 助力电极与所述画素电极交替分布。
7、 如权利要求 6 所述的增快液晶反应速度的画素结构， 其中， 所述 每两根画素电极之间设有一根助力电极。
8、 如权利要求 6 所述的增快液晶反应速度的画素结构， 其中， 所述 每两根助力电极之间设有两根画素电极。
9、 如权利要求 1 所述的增快液晶反应速度的画素结构， 还包括设于 上下基板之间的液晶层。
10、 一种增快液晶反应速度的画素结构， 包括： 第一薄膜晶体管、 第 二薄膜晶体管、 上基板、 与所述上基板相对设置的下基板、 设于下基板上 的画素电极、 设于上基板上的共同电极及设于下基板上的助力电极， 所述 助力电极设于每两画素电极之间， 所述第一薄膜晶体管具有第一漏极、 第 一源极及第一栅极， 所述第二薄膜晶体管具有第二漏极、 第二源极及第二 栅极， 所述画素电极与第二漏极电性连接， 所述助力电极与第一漏极电性 连接；
其中， 所述第一、 第二薄膜晶体管控制画素电极与助力电极在一定的 时间段具有一定的电压差；
还包括： 第一源极驱动器、 第一栅极驱动器、 第二源极驱动器及第二 栅极驱动器， 所述第一源极驱动器与第一薄膜晶体管的第一源极电性连 接， 所述第二源极驱动器与第二薄膜晶体管的第二源极电性连接， 所述第 一栅极驱动器与第一薄膜晶体管的第一栅极电性连接， 所述第二栅极驱动 器与第二薄膜晶体管的第二栅极电性连接；
其中， 所述画素电极具有一第一连接基板， 所述画素电极在所述第一 连接基板上呈梳状分布；
其中， 所述助力电极具有一第二连接基板， 所述助力电极在所述第二 连接基板上呈梳状分布；
其中， 所述助力电极与所述画素电极交替分布；
其中， 所述每两根画素电极之间设有一根助力电极；
还包括设于上下基板之间的液晶层。
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