WO2014205862A1 - Écran et dispositif d'affichage à cristaux liquides - Google Patents

Écran et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2014205862A1
WO2014205862A1 PCT/CN2013/078649 CN2013078649W WO2014205862A1 WO 2014205862 A1 WO2014205862 A1 WO 2014205862A1 CN 2013078649 W CN2013078649 W CN 2013078649W WO 2014205862 A1 WO2014205862 A1 WO 2014205862A1
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Prior art keywords
common
pixel electrode
switch
electrode
pixel
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PCT/CN2013/078649
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English (en)
Chinese (zh)
Inventor
董成才
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深圳市华星光电技术有限公司
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Priority to US14/232,264 priority Critical patent/US20150002497A1/en
Publication of WO2014205862A1 publication Critical patent/WO2014205862A1/fr

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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
    • 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
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134318—Electrodes characterised by their geometrical arrangement having a patterned common electrode
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134345—Subdivided pixels, e.g. for grey scale or redundancy
    • G—PHYSICS
    • 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
    • G09G2300/0439—Pixel structures
    • G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
    • G09G2300/0447—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
    • 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
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0814—Several active elements per pixel in active matrix panels used for selection purposes, e.g. logical AND for partial update
    • 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
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • 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
    • G09G2320/0257—Reduction of after-image effects

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal display panel and a liquid crystal display device.
  • TFT-LCD liquid crystal displays are popular among consumers because of their small size, thin thickness, light weight, and flicker-free picture. They have gradually replaced traditional CRT displays and occupied most of the display market.
  • TFT-LCD there is a general role of the big view (Low Color Shift) problem, that is, the color difference is large under a large viewing angle, and the color distortion is more serious, especially the large-size liquid crystal display panel using the VA display technology is more prominent.
  • the Gamma curve synthesized in the two regions has a small difference from the positive viewing angle at a large viewing angle, which significantly improves the problem of the large-view character bias.
  • a common electrode on a color filter (CF) substrate is used to provide a common voltage to the pixel electrodes of the array substrate.
  • the common electrodes on the CF substrate are usually connected together.
  • the main pixel region and the sub-pixel region share the same common electrode voltage on the side of the color filter substrate.
  • the common common voltage of the main pixel area and the sub-pixel area cannot be independently controlled, which brings difficulty in controlling the Gamma curve of the two pixel areas, and reduces the effect of the large-view character bias.
  • the common voltage shared by the main pixel region and the sub-pixel region may not be the optimum common electrode voltage of the main pixel region and the sub-pixel region, which may cause charge residue in the main pixel region and the sub-pixel region, resulting in image sticking. problem.
  • the technical problem to be solved by the present invention is to provide a liquid crystal display panel and a liquid crystal display device, which can effectively reduce color shift of a large viewing angle, reduce color distortion, and reduce image sticking.
  • a technical solution adopted by the present invention is to provide a liquid crystal display panel including a first substrate, a second substrate, a first common electrode driver, a second common electrode driver, and the first substrate and the second substrate.
  • a liquid crystal layer between the substrates the first substrate comprises a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in rows and columns, each pixel unit corresponding to one charging scan line and one discharge scan line And a data line;
  • each of the pixel units includes a first pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each of the pixel units further including a third switch And a discharge circuit, each switch includes a control end, an input end, and an output end, wherein the control ends of the first switch and the second switch are connected to a charging scan line corresponding to the pixel unit, and the input ends of the first switch and the second
  • All of the first sub-common electrodes are electrically connected to a region of the second substrate corresponding to a periphery of the display region of the liquid crystal display panel, and all of the second sub-common electrodes are corresponding to the corresponding ones in the second substrate.
  • the area around the display area of the liquid crystal display panel is electrically connected.
  • the first sub-common electrode and the second sub-common electrode have a strip shape.
  • a liquid crystal display panel including a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate;
  • the first substrate includes a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in an array, each pixel unit corresponding to one charge scan line, one discharge scan line, and one data line;
  • each pixel unit includes a pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each pixel unit further comprising a third switch and a discharge circuit, each switch including a control end And the input end and the output end, the control ends of the first switch and the second switch are all connected with the charging scan line corresponding to the pixel unit, and the input ends of the first switch and the second switch are connected with the data lines corresponding to the pixel unit, The output end of the first switch is connected to the first substrate, a second substrate, and a liquid crystal layer between the
  • the first common electrode and the second common electrode are independent of each other, the first common electrode includes a plurality of first sub-common electrodes, and the second common electrode includes a plurality of second sub-common electrodes, the first sub-common electrode and the second sub-common
  • the electrodes are independent of each other, and the length direction of each of the first sub-common electrodes is the same as the arrangement direction of the plurality of first pixel electrodes disposed adjacent to each other such that each of the first sub-common electrodes corresponds to one row or one column of the first pixel electrodes,
  • the length direction of each of the second sub-common electrodes is the same as the arrangement direction of the plurality of second pixel electrodes disposed adjacently adjacent to each other
  • the second sub-common electrode corresponds to one row or column of second pixel electrodes to provide a second common voltage required to match the second pixel electrode to display an image.
  • All of the first sub-common electrodes are electrically connected to a region of the second substrate corresponding to a periphery of the display region of the liquid crystal display panel, and all of the second sub-common electrodes are corresponding to the corresponding ones in the second substrate.
  • the area around the display area of the liquid crystal display panel is electrically connected.
  • the first sub-common electrode and the second sub-common electrode have a strip shape.
  • the liquid crystal display panel includes a first common electrode driver and a second common electrode driver, the first common electrode driver being connected to the first common electrode to input a first common voltage to the first common electrode, The second common electrode driver is connected to the second common electrode to input a second common voltage to the second common electrode.
  • the first substrate further includes a third common electrode
  • the discharge circuit includes a first capacitor and a second capacitor.
  • the input end of the third switch is connected to one of the first pixel electrode and the second pixel electrode
  • One end of the first capacitor is connected to the other pixel electrode
  • the other end of the first capacitor is connected to one end of the second capacitor
  • the other end of the second capacitor is connected to the third common electrode of the first substrate
  • the output end of the third switch is connected a first capacitor and a second capacitor
  • a scan signal is input to the charge scan line to control the first switch and the second switch to be turned on
  • a data signal is input to the data line to drive the display of the first pixel electrode and the second pixel electrode
  • the scan signal is input to the charging scan line
  • the scan signal is input to the discharge scan line to control the third switch to be turned on.
  • a pre-form is formed between the first pixel electrode and the second pixel electrode. Set the voltage difference.
  • the first substrate further includes a third common electrode, the discharge circuit is a discharge capacitor, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected to one end of the discharge capacitor.
  • the other end of the discharge capacitor is connected to the third common electrode of the first substrate; wherein a scan signal is input to the charge scan line to control the first switch and the second switch to be turned on, and a data signal is input to the data line to drive the first pixel electrode and
  • the second pixel electrode displays, then stops inputting the scan signal to the charging scan line, inputs a scan signal to the discharge scan line to control the third switch to be turned on, and controls the size of the discharge capacitor to form a gap between the first pixel electrode and the second pixel electrode.
  • the preset voltage difference is a discharge capacitor, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected to one end of the discharge capacitor.
  • the charging scan line, the discharge scan line, the first switch, the second switch, the third switch, and the discharge circuit are all located between the first pixel electrode and the second pixel electrode.
  • the first switch, the second switch and the third switch are all thin film transistors, and the control end of the switch corresponds to the gate of the thin film transistor, the input end of the switch corresponds to the source of the thin film transistor, and the output end of the switch corresponds to the thin film transistor The drain.
  • a liquid crystal display device including a liquid crystal display panel, the liquid crystal display panel including a first substrate, a second substrate, and between the first substrate and the second substrate
  • the first substrate comprises a plurality of charging scan lines, a plurality of discharge scan lines, a plurality of data lines, and a plurality of pixel units arranged in an array, each pixel unit corresponding to one charging scan line, one discharge scan line and one piece of data a first pixel electrode, a second pixel electrode, and first and second switches respectively acting on the first pixel electrode and the second pixel electrode, each of the pixel units further including a third switch and a discharge circuit
  • Each switch includes a control end, an input end, and an output end.
  • the control ends of the first switch and the second switch are connected to the charging scan line corresponding to the pixel unit, and the input ends of the first switch and the second switch are corresponding to each other.
  • the data line of the pixel unit is connected, the output end of the first switch is connected to the first pixel electrode, and the output end of the second switch is a pixel electrode is connected, a control end of the third switch is connected to the discharge scan line, an input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and an output end of the third switch is connected to the discharge circuit to drive the first
  • a preset voltage difference that is not zero is formed between the first pixel electrode and the second pixel electrode;
  • the second substrate includes a first common electrode and a second common electrode, and the first common electrode Corresponding to the first pixel electrode to provide a first common voltage, the second common electrode corresponding to the second pixel electrode to provide a second common voltage.
  • the first common electrode and the second common electrode are independent of each other, the first common electrode includes a plurality of first sub-common electrodes, and the second common electrode includes a plurality of second sub-common electrodes, the first sub-common electrode and the second sub-common
  • the electrodes are independent of each other, and the length direction of each of the first sub-common electrodes is the same as the arrangement direction of the plurality of first pixel electrodes disposed adjacent to each other such that each of the first sub-common electrodes corresponds to one row or one column of the first pixel electrodes,
  • the length direction of each of the second sub-common electrodes is the same as the arrangement direction of the plurality of second pixel electrodes disposed adjacently adjacent to each other
  • the second sub-common electrode corresponds to one row or column of second pixel electrodes to provide a second common voltage required to match the second pixel electrode to display an image.
  • All of the first sub-common electrodes are electrically connected to a region of the second substrate corresponding to a periphery of the display region of the liquid crystal display panel, and all of the second sub-common electrodes are corresponding to the corresponding ones in the second substrate.
  • the area around the display area of the liquid crystal display panel is electrically connected.
  • the first sub-common electrode and the second sub-common electrode have a strip shape.
  • the liquid crystal display panel includes a first common electrode driver and a second common electrode driver, the first common electrode driver being connected to the first common electrode to input a first common voltage to the first common electrode, The second common electrode driver is connected to the second common electrode to input a second common voltage to the second common electrode.
  • the first substrate further includes a third common electrode
  • the discharge circuit includes a first capacitor and a second capacitor.
  • the input end of the third switch is connected to one of the first pixel electrode and the second pixel electrode
  • One end of the first capacitor is connected to the other pixel electrode
  • the other end of the first capacitor is connected to one end of the second capacitor
  • the other end of the second capacitor is connected to the third common electrode of the first substrate
  • the output end of the third switch is connected a first capacitor and a second capacitor
  • a scan signal is input to the charge scan line to control the first switch and the second switch to be turned on
  • a data signal is input to the data line to drive the display of the first pixel electrode and the second pixel electrode
  • the scan signal is input to the charging scan line
  • the scan signal is input to the discharge scan line to control the third switch to be turned on.
  • a pre-form is formed between the first pixel electrode and the second pixel electrode. Set the voltage difference.
  • the first substrate further includes a third common electrode, the discharge circuit is a discharge capacitor, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected to one end of the discharge capacitor.
  • the other end of the discharge capacitor is connected to the third common electrode of the first substrate; wherein a scan signal is input to the charge scan line to control the first switch and the second switch to be turned on, and a data signal is input to the data line to drive the first pixel electrode and
  • the second pixel electrode displays, then stops inputting the scan signal to the charging scan line, inputs a scan signal to the discharge scan line to control the third switch to be turned on, and controls the size of the discharge capacitor to form a gap between the first pixel electrode and the second pixel electrode.
  • the preset voltage difference is a discharge capacitor, the input end of the third switch is connected to the first pixel electrode or the second pixel electrode, and the output end of the third switch is connected to one end of the discharge capacitor.
  • the charging scan line, the discharge scan line, the first switch, the second switch, the third switch, and the discharge circuit are all located between the first pixel electrode and the second pixel electrode.
  • each pixel unit includes a first pixel electrode and a second pixel electrode, and the charging scan corresponding to the pixel unit
  • the line and the data line respectively drive the display of the first pixel electrode and the second pixel electrode through the first switch and the second switch
  • the third switch is connected to the discharge scan line corresponding to the pixel unit, and the input end of the third switch and the first pixel electrode Or the second pixel electrode is connected, the output end of the third switch is connected to the discharge circuit
  • the first pixel electrode and the second pixel electrode are driven to be displayed, the first pixel electrode and the second pixel electrode are caused by the action of the discharge circuit
  • the second substrate includes a first common electrode and a second common electrode
  • the first common electrode corresponds to the first pixel electrode to provide a first common voltage required when the first pixel electrode is matched to display an image
  • the second common The electrode corresponds to the second pixel electrode to provide a second common voltage required to match the second pixel electrode to display an image, thereby being capable of separately controlling a common voltage required when the image is displayed in cooperation with the first pixel electrode and the second pixel electrode
  • FIG. 1 is a schematic structural view of an embodiment of a liquid crystal display panel of the present invention.
  • FIG. 2 is a schematic structural view of the first substrate of FIG. 1;
  • FIG. 3 is a schematic structural view of a pixel electrode of the first substrate and a common electrode of the second substrate of FIG. 1;
  • FIG. 4 is a schematic view showing deflection of liquid crystal molecules of the liquid crystal layer of FIG. 1 under control of a pixel electrode of a first substrate and a common electrode of a second substrate;
  • FIG. 5 is a schematic structural view of a first substrate in another embodiment of the liquid crystal display panel of the present invention.
  • the liquid crystal display panel includes a first base 10, a second substrate 11, and a liquid crystal layer 12 between the first substrate 10 and the second substrate 11.
  • the first substrate 10 is an array substrate in a liquid crystal display panel
  • the second substrate 11 is a color filter substrate in the liquid crystal display panel.
  • FIG. 2 is a schematic structural view of the first substrate 10 of the present embodiment.
  • the first substrate 10 includes a plurality of charging scan lines 101, a plurality of discharge scan lines 102, a plurality of data lines 103, and a plurality of pixel units 104 arranged in an array.
  • the plurality of charging scanning lines 101 and the discharging scanning lines 102 are alternately arranged in the column direction.
  • Each of the pixel units 104 corresponds to one charge scan line 101, one discharge scan line 102, and one data line 103.
  • the pixel unit 104 includes a first pixel electrode 1041 and a second pixel electrode 1042, and a first switch 1043 and a second switch 1044 that respectively act on the first pixel electrode 1041 and the second pixel electrode 1042.
  • the first pixel electrode 1041 and the second pixel electrode 1042 are arranged in the column direction.
  • the pixel unit 104 further includes a third switch 1045 and a discharge circuit 1046.
  • the first pixel electrode 1041 and the second pixel electrode 1042 are arranged in the column direction.
  • Each switch includes a control terminal, an input terminal, and an output terminal.
  • the control end of the first switch 1043 and the control end of the second switch 1044 are both connected to the charging scan line 101, and the input end of the first switch 1043 and the input end of the second switch 1044 are both connected to the data line 103, and the first switch 1043
  • the output end is connected to the first pixel electrode 1041, and the output end of the second switch 1044 is connected to the second pixel electrode 1042.
  • the control terminal of the third switch 1045 is connected to the discharge scan line 102, the input terminal of the third switch 1045 is connected to the second pixel electrode 1042, and the output terminal of the third switch 1045 is connected to the discharge circuit.
  • the first substrate 10 further includes a third common electrode 105.
  • the discharge circuit is a discharge capacitor 1046.
  • the output end of the third switch 1045 is connected to one end of the discharge capacitor 1046, and the other end of the discharge capacitor is connected to the third common electrode 105 on the first substrate 10.
  • FIG. 3 is a schematic structural view of a pixel electrode of the first substrate 10 and a common electrode of the second substrate 11 in the present embodiment.
  • the second substrate 11 includes a first common electrode 111 and a second common electrode 112 which are independent of each other, and the number of the first common electrode 111 and the second common electrode 112 is one.
  • the first common electrode 111 corresponds to the first pixel electrode 1041 to provide a first common voltage
  • the second common electrode 112 corresponds to the second pixel electrode 1042 to provide a second common voltage.
  • the first common electrode 111 includes a plurality of first sub-common electrodes 1111 in the shape of a strip (only two are shown in the figure), and the second common electrode 112 includes a plurality of second sub-common electrodes 1121 in the shape of a strip ( Only two are marked in the figure).
  • the length direction of each of the first sub-common electrodes 1111 is the same as the arrangement direction of the row of first pixel electrodes 1041, that is, the length direction of each of the first sub-common electrodes 1111 is the row direction, so that one row of each row of pixel units 104
  • One pixel electrode 1041 corresponds to one first sub-common electrode 1111
  • the length direction of each second sub-common electrode 1121 is the same as the arrangement direction of one row of second pixel electrodes 1042, that is, the length direction of each second sub-common electrode 1121 is a row.
  • the direction is such that one row of the second pixel electrode 1042 in each row of pixel units 104 corresponds to one second sub-common electrode 1121.
  • the first sub-common electrode 1111 and the second sub-common electrode 1121 are insulated from each other and arranged in the same direction as the arrangement direction of the first pixel electrode 1041 and the second pixel electrode 1042. In the column direction, the first pixel electrode 1041 and the second pixel electrode 1042 are alternately arranged, and the first sub-common electrode 1111 and the second sub-common electrode 1121 are also alternately arranged in the column direction.
  • first sub-common electrodes 1111 are electrically connected together in a region of the second substrate 11 corresponding to the periphery of the display region of the liquid crystal display panel, and all of the first sub-common electrodes 1111 electrically connected together as a first common
  • the second sub-common electrode 1121 is electrically connected to the region of the second substrate 11 corresponding to the periphery of the display region of the liquid crystal display panel, and all the second sub-common electrodes 1121 electrically connected together are used as a second.
  • first common electrode 111 and the second common electrode 112 of the present embodiment are fabricated, for example, when the first common electrode 111 is formed, a single transparent electrode can be used, and the entire transparent electrode can be used.
  • the portion corresponding to the display area of the liquid crystal display panel is divided into a plurality of strip-shaped electrodes to correspondingly obtain the plurality of first sub-common electrodes 1111, and the area of the entire transparent electrode corresponding to the periphery of the display area of the liquid crystal display panel is not The division is performed such that the plurality of first sub-common electrodes 1111 are electrically connected through the transparent electrodes corresponding to the peripheral portions of the display region.
  • the second common electrode 112 can also be obtained by a similar manufacturing method.
  • all the first sub-common electrodes may also be electrically connected in a region of the second substrate corresponding to the display region of the liquid crystal display panel, and all the second sub-common electrodes may also be in the display region corresponding to the liquid crystal display panel.
  • the area is electrically connected and is not limited here.
  • the first sub-common electrode and the second sub-common electrode may also have other shapes such as a column shape or a triangle shape, and are not limited to the above-described strip shape.
  • the liquid crystal display panel further includes a first common electrode driver and a second common electrode driver.
  • the first common electrode driver is connected to the first common electrode 111.
  • the first common electrode driver is connected to the first sub-common electrode 1111 to input a first common voltage to the first sub-common electrode 1111.
  • the second common electrode driver is connected to the second common electrode 112.
  • the second common electrode driver is connected to the second sub-common electrode 1121 to input a second common voltage to the second sub-common electrode.
  • the first common electrode driver and the second common electrode driver can be implemented by using an integrated driving IC chip.
  • a corresponding common voltage can be applied to the first common electrode and the second common electrode by using a driving circuit formed by discrete components, which is not limited thereto.
  • the first common electrode and the second common electrode may be driven not by the driver or the driving circuit, but the respective constant voltage signals are respectively applied to the first common electrode and the second common electrode by the two reference voltage sources.
  • the discharge capacitor 1046 by the action of the discharge capacitor 1046, a voltage difference of not zero between the first pixel electrode 1041 and the second pixel electrode 1042 can be formed, thereby achieving a low color shift effect.
  • the first common electrode 111 and the second common electrode 112 respectively provide a common voltage required for the first pixel electrode 1041 and the second pixel electrode 1042 to display an image, thereby further improving the low color shift effect of the liquid crystal display panel, and Helps reduce image sticking.
  • the scan of the scan line is performed by using a progressive scan method.
  • a scan signal is applied to the charge scan line 101 to control the first switch 1043 and the second switch 1044 to be turned on, and the data line 103 passes through the first switch 1043 and the second switch 1044 to the first pixel electrode 1041 and the second pixel electrode 1042, respectively.
  • the data signal is input, and at this time, the first pixel electrode 1041 and the second pixel electrode 1042 have the same potential.
  • the first common voltage is applied to the first sub-common electrode 1111 on the second substrate 11 by the first common electrode driver to provide a first pixel.
  • the electrode 1041 applies a first common voltage required for displaying an image, and applies a second common voltage to the second sub-common electrode 1121 through the second common electrode driver to provide a second portion required to match the second pixel electrode 1042 to display an image.
  • the display of the first pixel electrode 1041 and the second pixel electrode 1042 is driven by the cooperation of the charging scan line 101, the data line 103, and the first sub-common electrode 1111 and the second sub-common electrode 1121 on the second substrate 11.
  • the input of the scan signal to the charge scan line 101 is stopped, and the scan signal is input to the discharge scan line 102 to control the third switch 1045 to be turned on.
  • the output terminal of the third switching element 1045 is connected to the second pixel electrode 1042, and the output terminal is connected to the discharging capacitor 1046.
  • the third switch 1045 is turned on, the second pixel electrode 1042 and the discharging capacitor 1046 are electrically connected.
  • the potential of the discharge capacitor 1046 is controlled according to the viewing angle requirement, for example, the potential of the discharge capacitor 1046 is lower than the potential of the second pixel electrode 1042, so that when the second pixel electrode 1042 and the discharge capacitor 1046 are electrically connected, the second pixel electrode 1042 The partial charge is transferred such that the potential of the second pixel electrode 1042 is lower than the potential of the first pixel electrode 1041, thereby causing a non-zero voltage difference between the first pixel electrode 1041 and the second pixel electrode 1042.
  • the potentials of the first pixel electrode 1041 and the second pixel electrode 1042 are different, as shown in FIG.
  • the common voltages that the first pixel electrode 1041 and the second pixel electrode 1042 need to cooperate when displaying an image may be the same or different, but pass through the first sub-common electrode 1111 of the present embodiment.
  • the second sub-common electrode 1121 can respectively provide the first pixel electrode 1041 and the second pixel electrode 1042 with an optimum common voltage that they need to match when displaying an image, instead of using the same common common electrode pair.
  • the manner in which the pixel electrode and the second pixel electrode provide the same common voltage, thereby being able to better control the voltage difference between the first pixel electrode 1041 and the first sub-common electrode 1111 and the second pixel electrode 1042 and the first according to the viewing angle requirement The voltage difference between the two sub-common electrodes 112 is different, such that the deflection direction of the liquid crystal molecules corresponding to the first pixel electrode 1041 is different from the deflection direction of the liquid crystal molecules corresponding to the second pixel electrode 1042 to further improve the low color shift effect.
  • first pixel electrode 1041 and the second pixel electrode 1042 can obtain the optimal common voltage required for displaying the image, and can effectively reduce the charge residual of the first pixel electrode 1041 and the second pixel electrode 1042, thereby reducing image sticking. phenomenon.
  • the charge scan line 101, the discharge scan line 102, the first switch 1043, the second switch 1044, the third switch 1045, and the discharge capacitor 1046 of the present embodiment are both opaque between the first pixel electrode 1041 and the second pixel electrode 1042.
  • the light region can thereby increase the aperture ratio of the liquid crystal display panel.
  • the charge scan line, the discharge scan line, and the switch may also be disposed in an opaque region between the pixel units. For example, for two adjacent pixel units along the column direction, the charge scan line, the discharge scan line, the three switches, and the discharge capacitor corresponding to the pixel unit are both located in the pixel unit and the previous pixel unit adjacent to the pixel unit. between.
  • first switch 1043, the second switch 1044, and the third switch 1045 are thin film transistor devices, and the control end of the switch corresponds to the gate of the thin film transistor, and the input end of the switch corresponds to the source of the thin film transistor, and the output end of the switch Corresponding to the drain of the thin film transistor.
  • the three switches 1043, 1045, and 1046 may also be control switches such as Darlington tubes and transistors.
  • the input end of the third switch may also be connected to the first pixel electrode, and the potential of the first pixel electrode is changed by the action of the discharge capacitor, thereby causing the first pixel electrode and the second pixel electrode to be There is a voltage difference that is not zero, and a low color shift effect can also be achieved.
  • the first pixel electrode and the second pixel electrode may also be arranged in a row direction.
  • the length direction of the first sub-common electrode is a column direction, and each of the first sub-common electrodes and the first column of pixels The electrodes correspond to provide a first common voltage;
  • the length direction of the second sub-common electrodes is also a column direction, and each of the second sub-common electrodes corresponds to a column of second pixel electrodes to provide a second common voltage.
  • the second substrate may also include a plurality of independent first common electrodes and a plurality of independent second common electrodes, and the first common electrode and the second common electrode are independent of each other.
  • each of the first common electrodes corresponds to one column or a row of first pixel electrodes (determined by the arrangement direction of the first pixel electrode and the second pixel electrode), and each of the first common electrodes is connected to one first common electrode driver;
  • the second common electrodes correspond to one column or a row of second pixel electrodes, and each of the second common electrodes is connected to a second common electrode driver. It is also possible in the above manner to apply a corresponding common voltage to the first pixel electrode and the second pixel electrode separately.
  • first common electrode and the second common electrode may also be electrically connected, such that the first common electrode and the second common electrode are electrically connected through a reasonable step-down circuit or a boosting circuit, so that Both can simultaneously obtain the first common voltage and the second common voltage, respectively.
  • only one driver or one reference voltage source is required to apply the voltage signal.
  • a first common voltage is applied to the first common electrode by a drive circuit or a reference voltage source to provide an optimum first common voltage required to match the first pixel electrode to display an image.
  • the first common electrode and the second common electrode may be electrically connected through the voltage dividing resistor, such that when the driving circuit applies the first common to the first common electrode
  • the voltage of the first common voltage is reduced after being stepped down by the voltage dividing resistor, and the resistance value of the voltage dividing resistor is set according to the optimal second common voltage required for the second pixel electrode, thereby making the second common
  • the electrode obtains a desired second common voltage to provide an optimum second common voltage required to match the second pixel electrode to display an image.
  • the discharge circuit is implemented by a discharge capacitor.
  • the discharge circuit is implemented by two series capacitors, and the second basic structure is the same as the above embodiment.
  • the structure of the second substrate is the same.
  • the discharge circuit of the present embodiment includes a first capacitor 2046 and a second capacitor 2045.
  • the input end of the third switch 2045 is connected to the second pixel electrode, and one end of the first capacitor 2046 is connected to the first pixel electrode 2041, and the other end of the first capacitor 2046 is connected to one end of the second capacitor 2047.
  • the second capacitor 2047 The other end is connected to the third common electrode 205 on the first substrate 20.
  • the output of the third switch 2045 is connected between the first capacitor 2046 and the second capacitor 2047.
  • the charging scan line 201 When driving the liquid crystal display panel display, the charging scan line 201 inputs a scan signal to control the first switch 2043 and the second switch 2044 to be turned on, and the data line 203 passes through the first switch 2043 and the second switch 2044 to the first pixel electrode 2041 and The second pixel electrode 2042 inputs a data signal, and at this time, the potentials of the first pixel electrode 2041 and the second pixel electrode 2042 are the same.
  • the driving method of the second substrate is the same as that of the above embodiment, and will not be described herein.
  • the input of the scan signal to the charge scan line 201 is stopped, and the scan signal is input to the discharge scan line 202 to control the third switch 2045 to be turned on, thereby electrically connecting the second pixel electrode 2042 to the discharge circuit.
  • the first capacitor 2046 and the second capacitor 2047 are connected in series with the first pixel electrode 2041.
  • the data line 203 supplies a voltage signal (ie, a data signal) to the first pixel electrode 2041
  • the voltage signal is also applied to the first capacitor.
  • 2046 and a second capacitor 2047 formed in the branch are also applied to the first capacitor.
  • the voltage between the first capacitor 2046 and the second capacitor 2047 is lower than the voltage input by the data line 203, that is, the voltage between the first capacitor 2046 and the second capacitor 2047 is lower than the first voltage.
  • the voltage of one pixel electrode 2041 that is, the voltage between the first capacitor 2046 and the second capacitor 2047 is lower than the voltage of the second pixel electrode 2041, so that the partial charge of the second pixel electrode 2041 when the third switch 2045 is turned on
  • the transfer occurs such that the potential of the second pixel electrode 2041 is lower than the potential of the first pixel electrode 2041, thereby causing the liquid crystal molecules respectively corresponding to the first pixel electrode 2041 and the second pixel electrode 2042 to have different deflection directions, thereby achieving low color. Partial effect.
  • the structure of the second substrate of the present embodiment is similar to that of the above embodiment, that is, including the first common electrode and the second common electrode that are independent of each other to respectively provide the first pixel electrode 2041 and the second pixel electrode 2042 to display an image.
  • the optimal common voltage required for each time can further control the deflection of the corresponding liquid crystal molecules according to the viewing angle requirement, thereby further improving the low color shift effect at a large viewing angle, and at the same time helping to reduce image sticking.
  • the discharge circuit may also be a voltage dividing resistor, such that the input end of the third switch is connected to the first pixel electrode, the output end is connected to one end of the voltage dividing resistor, and the other end of the voltage dividing resistor is grounded.
  • the third switch When the third switch is turned on, the first pixel electrode is electrically connected to the voltage dividing resistor, and the voltage of the first pixel electrode is decreased after being divided by the voltage dividing resistor, so that the first pixel electrode and the second pixel electrode are There is a voltage difference between zero.
  • the present invention also provides an embodiment of a liquid crystal display device comprising the liquid crystal display panel of any of the above embodiments.

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  • Physics & Mathematics (AREA)
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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
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  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
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Abstract

Écran et dispositif d'affichage à cristaux liquides. Dans l'écran d'affichage à cristaux liquides, chaque unité (104) de pixel d'un premier substrat (10) comporte une première électrode (1041) de pixel et une deuxième électrode (1042) de pixel, une ligne (101) de balayage de charge et une ligne (103) de données pilotant respectivement la première électrode (1041) de pixel et la deuxième électrode (1042) de pixel pour l'affichage, au moyen d'un premier interrupteur (1043) et d'un deuxième interrupteur (1044), un troisième interrupteur (1045) étant relié à une ligne (102) de balayage de décharge, une extrémité d'entrée du troisième interrupteur (1045) étant reliée à la première électrode (1041) de pixel ou à la deuxième électrode (1042) de pixel, et un extrémité de sortie du troisième interrupteur (1045) étant reliée à un circuit de décharge; un deuxième substrat (11) comportant une première électrode commune (111) et un deuxième électrode commune (112), la première électrode commune (111) correspondant à la première électrode (1041) de pixel de façon à transmettre une première tension commune, et the deuxième électrode commune (112) correspondant à la deuxième électrode (1042) de pixel de façon à transmettre une deuxième tension commune. L'invention permet d'atténuer l'effet de faible dominante de couleur à un grand angle de vision, et présente l'avantage de réduire en même temps les phénomènes d'images résiduelles.
PCT/CN2013/078649 2013-06-28 2013-07-02 Écran et dispositif d'affichage à cristaux liquides WO2014205862A1 (fr)

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CN204065626U (zh) 2014-10-27 2014-12-31 京东方科技集团股份有限公司 阵列基板、显示面板及显示装置
CN104297969A (zh) * 2014-10-28 2015-01-21 京东方科技集团股份有限公司 液晶显示面板及其放电方法和显示装置
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CN204758983U (zh) * 2015-05-26 2015-11-11 京东方科技集团股份有限公司 一种阵列基板、液晶面板及液晶显示装置
TWI596596B (zh) 2016-11-17 2017-08-21 友達光電股份有限公司 顯示裝置
CN107728350A (zh) * 2017-10-26 2018-02-23 惠科股份有限公司 显示装置
CN108922467B (zh) * 2018-06-26 2019-12-31 惠科股份有限公司 像素电路及显示面板
CN208888524U (zh) * 2018-11-09 2019-05-21 惠科股份有限公司 画素驱动电路、画素结构及显示面板
CN109215607B (zh) * 2018-11-12 2021-02-26 惠科股份有限公司 显示面板的驱动方法、装置及计算机设备
CN109215606B (zh) * 2018-11-12 2020-12-01 惠科股份有限公司 显示面板的驱动方法、装置及计算机设备
CN112684641B (zh) * 2021-01-12 2022-05-31 Tcl华星光电技术有限公司 一种显示面板
CN113064299A (zh) * 2021-03-16 2021-07-02 深圳市华星光电半导体显示技术有限公司 一种液晶显示面板及其制备方法、液晶显示装置
CN113189807B (zh) * 2021-05-14 2022-06-03 长沙惠科光电有限公司 阵列基板、显示设备以及阵列基板的驱动方法
CN113406831B (zh) * 2021-06-21 2022-11-01 深圳市华星光电半导体显示技术有限公司 阵列基板及显示面板
CN115755472B (zh) * 2022-11-29 2023-11-14 惠科股份有限公司 阵列基板、液晶显示面板及驱动方法、液晶显示装置
CN115808818B (zh) * 2022-11-29 2024-01-26 惠科股份有限公司 液晶显示面板、液晶显示面板驱动方法和液晶显示装置

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