CN105278192B - Pixel-driving circuit, array substrate and liquid crystal display panel - Google Patents

Pixel-driving circuit, array substrate and liquid crystal display panel Download PDF

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Publication number
CN105278192B
CN105278192B CN201510781034.3A CN201510781034A CN105278192B CN 105278192 B CN105278192 B CN 105278192B CN 201510781034 A CN201510781034 A CN 201510781034A CN 105278192 B CN105278192 B CN 105278192B
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film transistor
pixel
pixel unit
tft
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CN105278192A (en
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徐向阳
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • G02F1/13624Active matrix addressed cells having more than one switching element per pixel
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1343Electrodes
    • G02F1/134309Electrodes characterised by their geometrical arrangement
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • G02F1/136286Wiring, e.g. gate line, drain line
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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

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

Abstract

A kind of pixel-driving circuit of present invention offer, array substrate and liquid crystal display panel.Row control separated time (40) is respectively set with the second controlling bus (20), corresponding each row pixel unit (5) in pixel-driving circuit first controlling bus of setting (10), corresponding each row pixel unit (5) is respectively set forward direction and controls thin film transistor (TFT) (T5) and Reverse Turning Control thin film transistor (TFT) (T6);When forward scan, first controlling bus (10) provides high potential, and the second controlling bus (20) provides low potential;For line n m row pixel unit (5), the grid of third thin film transistor (TFT) (T3) is electrically connected the row control separated time (40) for corresponding to line n pixel unit (5) setting, source electrode is electrically connected time area's pixel electrode (52), drain electrode is electrically connected one end that charge shares capacitance (C1);It can realize and carry out colour cast compensation in forward scan driving and reverse scan driving, promote the display quality of liquid crystal display panel.

Description

Pixel-driving circuit, array substrate and liquid crystal display panel
Technical field
The present invention relates to a kind of technical field of liquid crystal display more particularly to pixel-driving circuit, array substrate and liquid crystal surfaces Plate.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) be most widely used flat-panel monitor it One, liquid crystal display panel is the core component of liquid crystal display.Liquid crystal display panel is typically by a colored filter substrate (Color Filter, CF), a thin-film transistor array base-plate (Thin Film Transistor Array Substrate, TFT Array Substrate) and the liquid crystal layer (Liquid Crystal Layer) that is configured between two substrates constituted.Generally Pixel electrode, public electrode are respectively set in array substrate, colored filter substrate.When voltage is applied to pixel electrode and public affairs Common electrode will generate electric field in the liquid crystal layer, which determines the orientation of liquid crystal molecule, so as to adjust liquid crystal layer is incident on Light polarization, make liquid crystal display panel show image.
Industry develops a kind of referred to as macromolecule stabilization vertical orientation (Polymer Stabilized at present Vertical Alignment, PSVA) technology, accordingly there are PSVA type liquid crystal display panels.PSVA technologies are in liquid crystal material It the monomeric compound (Monomer) of middle incorporation debita spissitudo and shakes uniform;Then, mixed liquid crystal material is placed in and is added Tropisms (Isotropy) state such as it is heated up on hot device, when temperature is down to room temperature, liquid crystal compound can return to nematic (Nematic) state;Then, liquid crystal compound is injected between array substrate and colored filter substrate and applies voltage; When application voltage makes Liquid Crystal Molecules Alignment stablize, then allow monomeric compound that polymerization occurs using the mode of ultraviolet light or heating anti- Polymeric layer should be formed, thus achievees the purpose that carry out stable alignment to liquid crystal molecule.
As shown in Figure 1, in order to increase visual angle, pixel electrode is usually designed as " rice " font structure by the prior art.Pixel Electrode includes the horizontal trunk 200 of the vertical trunk 100 and strip of strip, and vertical trunk 100 and 200 center of horizontal trunk are hung down Straight intersection, so-called center, which intersects vertically, refers to that vertical trunk 100 and horizontal trunk 200 are mutually perpendicular to, and the two is by entire pixel Electrode area is divided into 4 regions (domain).Each pixel electrode area by with vertical trunk 100 or horizontal trunk 200 in ± 45 °, ± 135 ° angles the tiling composition of strip branch (Slit) 300, each strip branch 300 and vertical trunk 100 and Horizontal trunk 200 is in the same plane, is formed above and below shown in FIG. 1 and the pixel of " rice " font of the equal mirror symmetry in left and right is electric Pole structure.
The pixel electrode structure of this " rice " font, because the strip branch 300 in each pixel electrode area leads with vertical Dry 100 is identical with the angle of horizontal trunk 200, can there is certain visual color or vision colour cast, the penetrance of liquid crystal display panel Also can decline.
In order to improve visual color or vision colour cast, a pixel unit can be divided into primary area and time area by the prior art, One independent primary area pixel electrode is set in primary area, independent secondary area's pixel electrode, primary area pixel are set in secondary area Electrode is all made of above-mentioned " rice " font structure as shown in Figure 1 with time area's pixel electrode and designs.As shown in Fig. 2, existing setting Include the multiple pixel units 500 arranged in array, correspond to line n from bottom to top in the pixel-driving circuit in array substrate The horizontally extending nth bar controlling grid scan line G (n) of pixel unit setting, corresponding m row pixel units are set from left to right The m data line D (m), n and the m that vertically extend set is positive integer.Each pixel unit includes the first film Transistor T1, the second thin film transistor (TFT) T2, third thin film transistor (TFT) T3, primary area pixel electrode 501, secondary area's pixel electrode 502 and One charge shares capacitance C1.For line n m row pixel unit 500, the grid of the first film transistor T1 is electrically connected Nth bar controlling grid scan line G (n), source electrode are electrically connected m data line D (m), drain electrode is electrically connected primary area pixel electrode 501, The grid of the second thin film transistor (TFT) T2 is electrically connected nth bar controlling grid scan line G (n), source electrode is electrically connected m data lines D (m), drain electrode are electrically connected time area's pixel electrode 502, and the grid of the third thin film transistor (TFT) T3 is electrically connected corresponding to next (n+1)th controlling grid scan line G (n+1) of row pixel unit 500, source electrode are electrically connected time area's pixel electrode 502, drain electrode electrically connects One end that charge shares capacitance C1 is connect, the other end that charge shares capacitance C1 accesses common voltage.
Pixel-driving circuit shown in Fig. 2 is only applicable to simple scanning, i.e. gated sweep signal provides line by line from bottom to top, When scanning is to line n pixel unit 500, nth bar controlling grid scan line G (n) transmits high potential signal, line n pixel unit 500 All first film transistor T1 and the second thin film transistor (TFT) T2 is opened, third thin film transistor (TFT) T3 is closed, line n m row Primary area pixel electrode 501 in pixel unit 500 is charged to identical voltage with time area's pixel electrode 502;And then, it scans When to the (n+1)th row pixel unit 500, (n+1)th controlling grid scan line G (n+1) transmits high potential signal, line n pixel unit 500 All first film transistor T1 and the second thin film transistor (TFT) T2 is closed, third thin film transistor (TFT) T3 is opened, line n m row Charge in pixel unit 500 shares capacitance C1 and drags down time voltage of area's pixel electrode 502 so that primary area pixel electrode 501 with The voltage of secondary area's pixel electrode 502 is different, and then eliminates the color offset phenomenon that liquid crystal display panel is generated by visual angle difference.
And work as reverse scanning, i.e., when gated sweep signal provides line by line from top to bottom, in line n m row pixel unit 500 Primary area pixel electrode 501 it is identical as time area's 502 charged voltage holding of pixel electrode, can not achieve colour cast and compensate.
Invention content
The purpose of the present invention is to provide a kind of pixel-driving circuits, equal when forward scan driving and reverse scan drive It can realize the function of colour cast compensation.
The present invention also aims to provide a kind of array substrate, the equal energy when forward scan driving and reverse scan drive The function of enough realizing colour cast compensation, to promote the display quality of liquid crystal display panel.
The purpose of the present invention is to provide a kind of liquid crystal display panel again, the equal energy when forward scan driving and reverse scan drive The function of enough realizing colour cast compensation, has good display quality.
To achieve the above object, present invention firstly provides a kind of pixel-driving circuit, include arrange in array it is multiple Pixel unit, the horizontally extending nth bar controlling grid scan line for corresponding to the setting of line n pixel unit from top to bottom, certainly a left side To the setting of right correspondence m row pixel units the m data lines vertically extended, one article vertically extend the One controlling bus, second controlling bus vertically extended, corresponding each row pixel unit be respectively set along level The forward direction that control separated time, corresponding each row pixel unit are respectively set of going of direction extension controls thin film transistor (TFT) and corresponds to each The Reverse Turning Control thin film transistor (TFT) that row pixel unit is respectively set, n and m is positive integer;
Each pixel unit includes first film transistor, the second thin film transistor (TFT), third thin film transistor (TFT), primary area picture Plain electrode, secondary area's pixel electrode and charge share capacitance;For line n m row pixel units, the first film transistor Grid be electrically connected nth bar controlling grid scan line, source electrode is electrically connected m data lines, drain electrode is electrically connected primary area pixel electricity Pole, the grid of second thin film transistor (TFT) is electrically connected nth bar controlling grid scan line, source electrode is electrically connected m data lines, leakage Pole is electrically connected time area's pixel electrode, and the grid electric connection of the third thin film transistor (TFT) is set corresponding to line n pixel unit Row control separated time, the source electrode set are electrically connected time area's pixel electrode, drain electrode is electrically connected one end that charge shares capacitance, and charge is total Enjoy the other end access common voltage of capacitance;
For line n pixel unit, the grid of the positive control thin film transistor (TFT) is electrically connected the first controlling bus, source Pole is electrically connected (n+1)th controlling grid scan line corresponding to next line pixel unit, and drain electrode, which is electrically connected, corresponds to line n pixel The grid of the row control separated time of unit setting, the Reverse Turning Control thin film transistor (TFT) is electrically connected the second controlling bus, source electrode electricity Property connection corresponding to lastrow pixel unit (n-1)th controlling grid scan line, drain electrode be electrically connected correspond to line n pixel unit The row control separated time of setting;
When forward scan, first controlling bus provides high potential, and the second controlling bus provides low potential;Reverse scan When, first controlling bus provides low potential, and the second controlling bus provides high potential.
When forward scan, the positive control thin film transistor (TFT) is opened;When forward scan is to line n pixel unit, n-th Controlling grid scan line transmits high potential signal, all first film transistors and the second thin film transistor (TFT) of line n pixel unit It opens, third thin film transistor (TFT) is closed, the primary area pixel electrode in line n m row pixel units and time area's pixel electrode quilt Charge to identical voltage;When forward scan is to the (n+1)th row pixel unit, (n+1)th controlling grid scan line transmits high potential letter Number, all first film transistors of the (n+1)th row pixel unit and the second thin film transistor (TFT) open to primary area pixel electrode with While secondary area's pixel electrode charging, the positive control thin film transistor (TFT) for corresponding to the setting of line n pixel unit is connected to (n+1)th Controlling grid scan line controls separated time with the row corresponding to the setting of line n pixel unit so that corresponds to the setting of line n pixel unit Row control separated time transmits high potential signal, and all third thin film transistor (TFT)s of line n pixel unit are opened, line n m row pixels Charge in unit shares capacitance and drags down time voltage of area's pixel electrode so that the voltage of secondary area's pixel electrode is less than primary area pixel The voltage of electrode.
When reverse scan, the Reverse Turning Control thin film transistor (TFT) is opened;When reverse scan is to line n pixel unit, n-th Controlling grid scan line transmits high potential signal, all first film transistors and the second thin film transistor (TFT) of line n pixel unit It opens, third thin film transistor (TFT) is closed, the primary area pixel electrode in line n m row pixel units and time area's pixel electrode quilt Charge to identical voltage;When reverse scan is to the (n-1)th row pixel unit, (n-1)th controlling grid scan line transmits high potential letter Number, all first film transistors of the (n-1)th row pixel unit and the second thin film transistor (TFT) open to primary area pixel electrode with While secondary area's pixel electrode charging, the Reverse Turning Control thin film transistor (TFT) for corresponding to the setting of line n pixel unit is connected to (n-1)th Controlling grid scan line controls separated time with the row corresponding to the setting of line n pixel unit so that corresponds to the setting of line n pixel unit Row control separated time transmits high potential signal, and all third thin film transistor (TFT)s of line n pixel unit are opened, line n m row pixels Charge in unit shares capacitance and drags down time voltage of area's pixel electrode so that the voltage of secondary area's pixel electrode is less than primary area pixel The voltage of electrode.
The primary area pixel electrode is " rice " font structure with time area's pixel electrode, and material is ITO.
The present invention also provides a kind of array substrates, and it includes in array to have pixel-driving circuit, the pixel-driving circuit Multiple pixel units of formula arrangement, the horizontally extending nth bar grid for corresponding to the setting of line n pixel unit from top to bottom Scan line, the m data lines vertically extended for corresponding to the setting of m row pixel units from left to right, one article along vertical First controlling bus of direction extension, second controlling bus vertically extended, corresponding each row pixel unit difference The positive control film crystal that horizontally extending row control separated time, the corresponding each row pixel unit being arranged are respectively set The Reverse Turning Control thin film transistor (TFT) that pipe and corresponding each row pixel unit are respectively set, n and m is positive integer;
Each pixel unit includes first film transistor, the second thin film transistor (TFT), third thin film transistor (TFT), primary area picture Plain electrode, secondary area's pixel electrode and charge share capacitance;For line n m row pixel units, the first film transistor Grid be electrically connected nth bar controlling grid scan line, source electrode is electrically connected m data lines, drain electrode is electrically connected primary area pixel electricity Pole, the grid of second thin film transistor (TFT) is electrically connected nth bar controlling grid scan line, source electrode is electrically connected m data lines, leakage Pole is electrically connected time area's pixel electrode, and the grid electric connection of the third thin film transistor (TFT) is set corresponding to line n pixel unit Row control separated time, the source electrode set are electrically connected time area's pixel electrode, drain electrode is electrically connected one end that charge shares capacitance, and charge is total Enjoy the other end access common voltage of capacitance;
For line n pixel unit, the grid of the positive control thin film transistor (TFT) is electrically connected the first controlling bus, source Pole is electrically connected (n+1)th controlling grid scan line corresponding to next line pixel unit, and drain electrode, which is electrically connected, corresponds to line n pixel The grid of the row control separated time of unit setting, the Reverse Turning Control thin film transistor (TFT) is electrically connected the second controlling bus, source electrode electricity Property connection corresponding to lastrow pixel unit (n-1)th controlling grid scan line, drain electrode be electrically connected correspond to line n pixel unit The row control separated time of setting;
When forward scan, first controlling bus provides high potential, and the second controlling bus provides low potential;Reverse scan When, first controlling bus provides low potential, and the second controlling bus provides high potential.
When forward scan, the positive control thin film transistor (TFT) is opened;When forward scan is to line n pixel unit, n-th Controlling grid scan line transmits high potential signal, all first film transistors and the second thin film transistor (TFT) of line n pixel unit It opens, third thin film transistor (TFT) is closed, the primary area pixel electrode in line n m row pixel units and time area's pixel electrode quilt Charge to identical voltage;When forward scan is to the (n+1)th row pixel unit, (n+1)th controlling grid scan line transmits high potential letter Number, all first film transistors of the (n+1)th row pixel unit and the second thin film transistor (TFT) open to primary area pixel electrode with While secondary area's pixel electrode charging, the positive control thin film transistor (TFT) for corresponding to the setting of line n pixel unit is connected to (n+1)th Controlling grid scan line controls separated time with the row corresponding to the setting of line n pixel unit so that corresponds to the setting of line n pixel unit Row control separated time transmits high potential signal, and all third thin film transistor (TFT)s of line n pixel unit are opened, line n m row pixels Charge in unit shares capacitance and drags down time voltage of area's pixel electrode so that the voltage of secondary area's pixel electrode is less than primary area pixel The voltage of electrode.
When reverse scan, the Reverse Turning Control thin film transistor (TFT) is opened;When reverse scan is to line n pixel unit, n-th Controlling grid scan line transmits high potential signal, all first film transistors and the second thin film transistor (TFT) of line n pixel unit It opens, third thin film transistor (TFT) is closed, the primary area pixel electrode in line n m row pixel units and time area's pixel electrode quilt Charge to identical voltage;When reverse scan is to the (n-1)th row pixel unit, (n-1)th controlling grid scan line transmits high potential letter Number, all first film transistors of the (n-1)th row pixel unit and the second thin film transistor (TFT) open to primary area pixel electrode with While secondary area's pixel electrode charging, the Reverse Turning Control thin film transistor (TFT) for corresponding to the setting of line n pixel unit is connected to (n-1)th Controlling grid scan line controls separated time with the row corresponding to the setting of line n pixel unit so that corresponds to the setting of line n pixel unit Row control separated time transmits high potential signal, and all third thin film transistor (TFT)s of line n pixel unit are opened, line n m row pixels Charge in unit shares capacitance and drags down time voltage of area's pixel electrode so that the voltage of secondary area's pixel electrode is less than primary area pixel The voltage of electrode.
The primary area pixel electrode is " rice " font structure with time area's pixel electrode, and material is ITO.
The present invention provides a kind of liquid crystal display panel again, including array substrate, colored filter substrate and the configuration being oppositely arranged PSVA liquid crystal layers between array substrate and colored filter substrate;The PSVA liquid crystal layers include polymeric layer and are scattered in Liquid crystal in the polymeric layer;The array substrate is the array substrate that aforementioned present invention provides.
Beneficial effects of the present invention:A kind of pixel-driving circuit, array substrate and liquid crystal display panel provided by the invention, setting Row control separated time, corresponding each row pixel list is respectively set with the second controlling bus, corresponding each row pixel unit in first controlling bus Positive control thin film transistor (TFT) and Reverse Turning Control thin film transistor (TFT) is respectively set in member, for line n m row pixel units, setting The grid of third thin film transistor (TFT) is electrically connected corresponding to going for line n pixel unit setting controls separated time, source electrode is electrically connected Secondary area's pixel electrode, drain electrode are electrically connected one end that charge shares capacitance;When forward scan, first controlling bus provides High potential, the second controlling bus provide low potential, and forward direction control thin film transistor (TFT) is opened, the master in line n m row pixel units After area's pixel electrode is first charged to identical voltage with time area's pixel electrode, the scanning of the (n+1)th row pixel unit is then carried out, It is connected to (n+1)th controlling grid scan line corresponding to the positive control thin film transistor (TFT) of line n pixel unit setting and corresponds to line n The row control separated time of pixel unit setting so that the row control separated time for corresponding to the setting of line n pixel unit transmits high potential letter Number, all third thin film transistor (TFT)s of line n pixel unit are opened, and the charge in line n m row pixel units is shared capacitance and drawn The voltage of low order area pixel electrode so that the voltage of secondary area's pixel electrode is less than the voltage of primary area pixel electrode;Work as reverse scan When, first controlling bus provides low potential, and the second controlling bus provides high potential, and Reverse Turning Control thin film transistor (TFT) is opened, After primary area pixel electrode in line n m row pixel units is first charged to identical voltage with time area's pixel electrode, then into The scanning of row the (n-1)th row pixel unit corresponds to the Reverse Turning Control thin film transistor (TFT) connection (n-1)th of line n pixel unit setting Controlling grid scan line with corresponding to the row control separated time of line n pixel unit setting so that correspond to line n pixel unit and be arranged Row control separated time transmit high potential signal, all third thin film transistor (TFT)s of line n pixel unit are opened, line n m row pictures Charge in plain unit shares capacitance and drags down time voltage of area's pixel electrode so that the voltage of secondary area's pixel electrode is less than primary area picture The voltage of plain electrode;Colour cast compensation can be carried out in forward scan driving and reverse scan driving by realizing, and promote liquid crystal The display quality of panel.
Description of the drawings
For further understanding of the features and technical contents of the present invention, it please refers to below in connection with the detailed of the present invention Illustrate and attached drawing, however, the drawings only provide reference and explanation, is not intended to limit the present invention.
In attached drawing,
Fig. 1 is the structural schematic diagram of existing " rice " font pixel electrode;
Fig. 2 is the circuit diagram of existing pixel-driving circuit;
Fig. 3 is the circuit diagram of the pixel-driving circuit of the present invention;
Fig. 4 is the cross-sectional view of the liquid crystal display panel of the present invention.
Specific implementation mode
Further to illustrate the technological means and its effect of the invention taken, below in conjunction with the preferred implementation of the present invention Example and its attached drawing are described in detail.
Include the multiple pixel lists arranged in array referring to Fig. 3, present invention firstly provides a kind of pixel-driving circuit Member 5, the horizontally extending nth bar controlling grid scan line G (n) for corresponding to the setting of line n pixel unit 5 from top to bottom, certainly a left side To right correspondence m row pixel unit 5 setting the m data line D (m) vertically extended, one article vertically prolong The second controlling bus 20 that the first controlling bus 10, one stretched vertically extends, corresponding each row pixel unit 5 are set respectively The positive control film crystal that horizontally extending row control separated time 40, the corresponding each row pixel unit 5 set are respectively set Reverse Turning Control the thin film transistor (TFT) T6, n and m that pipe T5 and corresponding each row pixel unit 5 are respectively set are positive integer.
Each pixel unit 5 includes first film transistor T1, the second thin film transistor (TFT) T2, third thin film transistor (TFT) T3, primary area pixel electrode 51, secondary area's pixel electrode 52 and charge share capacitance C1.For line n m row pixel unit 5, institute The grid for stating first film transistor T1 is electrically connected nth bar controlling grid scan line G (n), source electrode is electrically connected m data lines D (m), drain electrode is electrically connected primary area pixel electrode 51, and the grid of the second thin film transistor (TFT) T2 is electrically connected nth bar grid and sweeps Retouch line G (n), source electrode is electrically connected m data line D (m), drain electrode is electrically connected time area's pixel electrode 52, the third film The grid of transistor T3 is electrically connected row control separated time 40, the source electrode being arranged corresponding to line n pixel unit 5 and is electrically connected secondary area Pixel electrode 52, drain electrode are electrically connected one end that charge shares capacitance C1, and the other end that charge shares capacitance C1 accesses common electrical Pressure.
For line n pixel unit 5, the grid of the positive control thin film transistor (TFT) T5 is electrically connected the first controlling bus 10, source electrode is electrically connected (n+1)th controlling grid scan line G (n+1) corresponding to next line pixel unit 5, drain electrode electric connection pair It should be electrically connected the in the row control separated time 40 that line n pixel unit 5 is arranged, the grid of the Reverse Turning Control thin film transistor (TFT) T6 Two controlling bus 20, source electrode are electrically connected (n-1)th controlling grid scan line G (n-1) corresponding to lastrow pixel unit 5, drain electrode It is electrically connected and corresponds to the row control separated time 40 that line n pixel unit 5 is arranged.
The pixel-driving circuit of the present invention can realize that colour cast compensates when forward scan driving and reverse scan drive Function.
Specifically, when gated sweep signal provides line by line from top to bottom, forward scan driving, first control are carried out Bus 10 provides high potential, and the second controlling bus 20 provides low potential, and the positive control thin film transistor (TFT) T5 is opened.Work as forward direction When scanning line n pixel unit 5, nth bar controlling grid scan line G (n) transmits high potential signal, and line n pixel unit 5 owns First film transistor T1 is opened with the second thin film transistor (TFT) T2, and third thin film transistor (TFT) T3 is closed, line n m row pixels Primary area pixel electrode 51 in unit 5 is charged to identical voltage with time area's pixel electrode 52;When forward scan to the (n+1)th row When pixel unit 5, (n+1)th controlling grid scan line G (n+1) transmission high potential signal, all the first of the (n+1)th row pixel unit 5 Thin film transistor (TFT) T1 and the second thin film transistor (TFT) T2 is opened to the same of primary area pixel electrode 51 and 52 charging of time area pixel electrode When, correspond to the positive control thin film transistor (TFT) T5 that line n pixel unit 5 is arranged and is connected to (n+1)th controlling grid scan line G (n+1) With the row control separated time 40 being arranged corresponding to line n pixel unit 5 so that correspond to the row control that line n pixel unit 5 is arranged Separated time 40 transmits high potential signal, and all third thin film transistor (TFT) T3 of line n pixel unit 5 are opened, line n m row pixels Charge in unit 5 shares capacitance C1 and drags down time voltage of area's pixel electrode 52 so that the voltage of secondary area's pixel electrode 52 is less than The voltage of primary area pixel electrode 51, the colour cast generated by panel visual angle difference to compensation.
When gated sweep signal provides line by line from bottom to top, reverse scan driving, first controlling bus 10 are carried out Low potential is provided, the second controlling bus 20 provides high potential, and the Reverse Turning Control thin film transistor (TFT) T6 is opened.When reverse scan is arrived When line n pixel unit 5, nth bar controlling grid scan line G (n) transmits high potential signal, and all the first of line n pixel unit 5 are thin Film transistor T1 is opened with the second thin film transistor (TFT) T2, and third thin film transistor (TFT) T3 is closed, in line n m row pixel unit 5 Primary area pixel electrode 51 be charged to identical voltage with time area pixel electrode 52;When reverse scan to the (n-1)th row pixel list When member 5, (n-1)th controlling grid scan line G (n-1) transmits high potential signal, and all the first films of the (n-1)th row pixel unit 5 are brilliant It is corresponding while body pipe T1 and the second thin film transistor (TFT) T2 is opened to primary area pixel electrode 51 with 52 charging of pixel electrode of secondary area It is connected to (n-1)th controlling grid scan line G (n-1) in the Reverse Turning Control thin film transistor (TFT) T6 that line n pixel unit 5 is arranged and corresponds to The row control separated time 40 that line n pixel unit 5 is arranged so that correspond to the row control separated time 40 that line n pixel unit 5 is arranged and pass High potential signal is passed, all third thin film transistor (TFT) T3 of line n pixel unit 5 are opened, in line n m row pixel unit 5 Charge shares capacitance C1 and drags down time voltage of area's pixel electrode 52 so that the voltage of secondary area's pixel electrode 52 is less than primary area pixel electricity The voltage of pole 51, the colour cast generated by panel visual angle difference to compensation.
Further, the primary area pixel electrode 51 and time area's pixel electrode 52 are " rice " font structure.Please refer to figure 1, the primary area pixel electrode 51 of " rice " font structure includes the vertical trunk 100 and strip of strip with time area pixel electrode 52 Horizontal trunk 200, and vertical trunk 100 and 200 center of horizontal trunk intersect vertically, it refers to vertical master that so-called center, which intersects vertically, Dry 100 and horizontal trunk 200 be mutually perpendicular to, and entire pixel electrode area is divided into 4 regions by the two.Each pixel electricity Polar region domain is all formed by tiling in the strip branch 300 of ± 45 °, ± 135 ° angles with vertical trunk 100 or horizontal trunk 200, Each strip branch 300 and vertical trunk 100 and horizontal trunk 200 are in the same plane, form shown in FIG. 1 upper and lower and left and right The pixel electrode structure of " rice " font of equal mirror symmetry.
The primary area pixel electrode 51 and 52 material of time area pixel electrode be tin indium oxide (Indium Tin Oxide, ITO) film.
The present invention also provides a kind of array substrates, with above-mentioned pixel-driving circuit as shown in Figure 3, in forward direction Turntable driving and reverse scan can realize the function of colour cast compensation when driving, promote the display quality of liquid crystal display panel, herein Repeated description no longer is carried out to pixel-driving circuit.
Referring to Fig. 4, the present invention provides a kind of liquid crystal display panel again, including be oppositely arranged array substrate 1, colored filter Substrate 2 and the PSVA liquid crystal layers 3 being configured between array substrate 1 and colored filter substrate 2.The PSVA liquid crystal layers 3 include Polymeric layer 31 and the liquid crystal 32 being scattered in the polymeric layer 31 carry out stabilization to liquid crystal 32 by the polymeric layer 31 and match To without traditional alignment film is arranged on the opposed inside surface of array substrate 1 and colored filter substrate 2.It is described Array substrate 1 has above-mentioned pixel-driving circuit as shown in Figure 3, to equal when forward scan driving and reverse scan drive It can realize the function of colour cast compensation so that liquid crystal display panel has good display quality, herein no longer to pixel-driving circuit Carry out repeated description.
In conclusion pixel-driving circuit, array substrate and the liquid crystal display panel of the present invention, the first controlling bus of setting and the Row control separated time is respectively set in two controlling bus, corresponding each row pixel unit, positive control is respectively set in corresponding each row pixel unit Third thin film transistor (TFT) is arranged for line n m row pixel units in made membrane transistor and Reverse Turning Control thin film transistor (TFT) Grid is electrically connected and controls separated time corresponding to going for line n pixel unit setting, source electrode is electrically connected secondary area pixel electrode, drain electrode It is electrically connected one end that charge shares capacitance;When forward scan, first controlling bus provides high potential, and the second control is total Line provides low potential, and forward direction control thin film transistor (TFT) is opened, the primary area pixel electrode in line n m row pixel units and time area After pixel electrode is first charged to identical voltage, the scanning of the (n+1)th row pixel unit is then carried out, corresponds to line n pixel The positive control thin film transistor (TFT) of unit setting is connected to (n+1)th controlling grid scan line and corresponding to the setting of line n pixel unit Row control separated time so that the row control separated time for corresponding to the setting of line n pixel unit transmits high potential signal, line n pixel list All third thin film transistor (TFT)s of member are opened, and the charge in line n m row pixel units shares capacitance and drags down time area's pixel electrode Voltage so that the voltage of secondary area's pixel electrode be less than primary area pixel electrode voltage;When reverse scan, first control Bus provides low potential, and the second controlling bus provides high potential, and Reverse Turning Control thin film transistor (TFT) is opened, line n m row pixel lists After primary area pixel electrode in member is first charged to identical voltage with time area's pixel electrode, the (n-1)th row pixel list is then carried out Member scanning, correspond to line n pixel unit setting Reverse Turning Control thin film transistor (TFT) be connected to (n-1)th controlling grid scan line with it is right It should be in the row control separated time that line n pixel unit is arranged so that the row control separated time for corresponding to the setting of line n pixel unit transmits All third thin film transistor (TFT)s of high potential signal, line n pixel unit are opened, and the charge in line n m row pixel units is total It enjoys capacitance and drags down time voltage of area's pixel electrode so that the voltage of secondary area's pixel electrode is less than the voltage of primary area pixel electrode;It is real Colour cast compensation can be carried out in forward scan driving and reverse scan driving by having showed, and promote the display quality of liquid crystal display panel.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology Other various corresponding change and deformations are made in design, and all these change and distortions should all belong to the appended right of the present invention It is required that protection domain.

Claims (5)

1. a kind of pixel-driving circuit, which is characterized in that include multiple pixel units (5) arranged in array, from top to bottom The horizontally extending nth bar controlling grid scan line (G (n)) of corresponding line n pixel unit (5) setting corresponds to from left to right The m data lines (D (m)) that vertically extend of m row pixel unit (5) setting, one article vertically extend First controlling bus (10), second controlling bus (20) vertically extended, corresponding each row pixel unit (5) are respectively The forward direction control that the horizontally extending row being arranged controls separated time (40), corresponding each row pixel unit (5) is respectively set is thin The Reverse Turning Control thin film transistor (TFT) (T6) that film transistor (T5) and corresponding each row pixel unit (5) are respectively set, n are with m Positive integer;
Each pixel unit (5) includes first film transistor (T1), the second thin film transistor (TFT) (T2), third thin film transistor (TFT) (T3), primary area pixel electrode (51), secondary area's pixel electrode (52) and charge share capacitance (C1);For line n m row pixels Unit (5), the grid of the first film transistor (T1) is electrically connected nth bar controlling grid scan line (G (n)), source electrode electrically connects Connect m data lines (D (m)), drain electrode is electrically connected primary area pixel electrode (51), the grid of second thin film transistor (TFT) (T2) It is electrically connected nth bar controlling grid scan line (G (n)), source electrode is electrically connected m data lines (D (m)), drain electrode is electrically connected time area Pixel electrode (52), the grid of the third thin film transistor (TFT) (T3), which is electrically connected, corresponds to line n pixel unit (5) setting Row control separated time (40), source electrode are electrically connected time area's pixel electrode (52), drain electrode is electrically connected charge shares capacitance (C1) one End, charge share the other end access common voltage of capacitance (C1);
For line n pixel unit (5), the grid of the positive control thin film transistor (TFT) (T5) is electrically connected the first controlling bus (10), source electrode is electrically connected (n+1)th controlling grid scan line (G (n+1)) corresponding to next line pixel unit (5), and drain electrode is electrical Connection corresponds to the row control separated time (40) of line n pixel unit (5) setting, the grid of the Reverse Turning Control thin film transistor (TFT) (T6) Pole is electrically connected the second controlling bus (20), source electrode electric connection is swept corresponding to (n-1)th grid of lastrow pixel unit (5) Line (G (n-1)) is retouched, drain electrode is electrically connected the row control separated time (40) for corresponding to line n pixel unit (5) setting;
When forward scan, first controlling bus (10) provides high potential, and the second controlling bus (20) provides low potential;Reversely When scanning, first controlling bus (10) provides low potential, and the second controlling bus (20) provides high potential;
When forward scan, the positive control thin film transistor (TFT) (T5) is opened;When forward scan is to line n pixel unit (5), Nth bar controlling grid scan line (G (n)) transmits high potential signal, all first film transistors (T1) of line n pixel unit (5) It is opened with the second thin film transistor (TFT) (T2), third thin film transistor (TFT) (T3) is closed, the master in line n m row pixel unit (5) Area's pixel electrode (51) is charged to identical voltage with time area's pixel electrode (52);When forward scan to the (n+1)th row pixel list When first (5), (n+1)th controlling grid scan line (G (n+1)) transmission high potential signal, all the first of the (n+1)th row pixel unit (5) Thin film transistor (TFT) (T1) is opened with the second thin film transistor (TFT) (T2) to primary area pixel electrode (51) and time area's pixel electrode (52) While charging, the positive control thin film transistor (TFT) (T5) for corresponding to line n pixel unit (5) setting is connected to (n+1)th grid Scan line (G (n+1)) and the row control separated time (40) corresponding to line n pixel unit (5) setting so that correspond to line n picture The row control separated time (40) of plain unit (5) setting transmits high potential signal, and all third films of line n pixel unit (5) are brilliant Body pipe (T3) is opened, and the charge in line n m row pixel unit (5) shares capacitance (C1) and drags down time area's pixel electrode (52) Voltage so that the voltage of secondary area's pixel electrode (52) is less than the voltage of primary area pixel electrode (51);
When reverse scan, the Reverse Turning Control thin film transistor (TFT) (T6) is opened;When reverse scan is to line n pixel unit (5), Nth bar controlling grid scan line (G (n)) transmits high potential signal, all first film transistors (T1) of line n pixel unit (5) It is opened with the second thin film transistor (TFT) (T2), third thin film transistor (TFT) (T3) is closed, the master in line n m row pixel unit (5) Area's pixel electrode (51) is charged to identical voltage with time area's pixel electrode (52);When reverse scan to the (n-1)th row pixel list When first (5), (n-1)th controlling grid scan line (G (n-1)) transmission high potential signal, all the first of the (n-1)th row pixel unit (5) Thin film transistor (TFT) (T1) is opened with the second thin film transistor (TFT) (T2) to primary area pixel electrode (51) and time area's pixel electrode (52) While charging, the Reverse Turning Control thin film transistor (TFT) (T6) for corresponding to line n pixel unit (5) setting is connected to (n-1)th grid Scan line (G (n-1)) and the row control separated time (40) corresponding to line n pixel unit (5) setting so that correspond to line n picture The row control separated time (40) of plain unit (5) setting transmits high potential signal, and all third films of line n pixel unit (5) are brilliant Body pipe (T3) is opened, and the charge in line n m row pixel unit (5) shares capacitance (C1) and drags down time area's pixel electrode (52) Voltage so that the voltage of secondary area's pixel electrode (52) is less than the voltage of primary area pixel electrode (51).
2. pixel-driving circuit as described in claim 1, which is characterized in that the primary area pixel electrode (51) and time area's pixel Electrode (52) is " rice " font structure, and material is ITO.
3. a kind of array substrate, which is characterized in that it includes being arranged in array to have pixel-driving circuit, the pixel-driving circuit Multiple pixel units (5) of cloth, the horizontally extending nth bar grid for corresponding to line n pixel unit (5) setting from top to bottom Pole scan line (G (n)), the m data lines vertically extended for corresponding to m row pixel unit (5) setting from left to right (D (m)), first controlling bus (10) vertically extended, second controlling bus vertically extended (20), the horizontally extending row that corresponding each row pixel unit (5) is respectively set controls separated time (40), corresponding each row pixel The positive control thin film transistor (TFT) (T5) and corresponding each row pixel unit (5) that unit (5) is respectively set are respectively set reversed Thin film transistor (TFT) (T6) is controlled, n and m is positive integer;
Each pixel unit (5) includes first film transistor (T1), the second thin film transistor (TFT) (T2), third thin film transistor (TFT) (T3), primary area pixel electrode (51), secondary area's pixel electrode (52) and charge share capacitance (C1);For line n m row pixels Unit (5), the grid of the first film transistor (T1) is electrically connected nth bar controlling grid scan line (G (n)), source electrode electrically connects Connect m data lines (D (m)), drain electrode is electrically connected primary area pixel electrode (51), the grid of second thin film transistor (TFT) (T2) It is electrically connected nth bar controlling grid scan line (G (n)), source electrode is electrically connected m data lines (D (m)), drain electrode is electrically connected time area Pixel electrode (52), the grid of the third thin film transistor (TFT) (T3), which is electrically connected, corresponds to line n pixel unit (5) setting Row control separated time (40), source electrode are electrically connected time area's pixel electrode (52), drain electrode is electrically connected charge shares capacitance (C1) one End, charge share the other end access common voltage of capacitance (C1);
For line n pixel unit (5), the grid of the positive control thin film transistor (TFT) (T5) is electrically connected the first controlling bus (10), source electrode is electrically connected (n+1)th controlling grid scan line (G (n+1)) corresponding to next line pixel unit (5), and drain electrode is electrical Connection corresponds to the row control separated time (40) of line n pixel unit (5) setting, the grid of the Reverse Turning Control thin film transistor (TFT) (T6) Pole is electrically connected the second controlling bus (20), source electrode electric connection is swept corresponding to (n-1)th grid of lastrow pixel unit (5) Line (G (n-1)) is retouched, drain electrode is electrically connected the row control separated time (40) for corresponding to line n pixel unit (5) setting;
When forward scan, first controlling bus (10) provides high potential, and the second controlling bus (20) provides low potential;Reversely When scanning, first controlling bus (10) provides low potential, and the second controlling bus (20) provides high potential;
When forward scan, the positive control thin film transistor (TFT) (T5) is opened;When forward scan is to line n pixel unit (5), Nth bar controlling grid scan line (G (n)) transmits high potential signal, all first film transistors (T1) of line n pixel unit (5) It is opened with the second thin film transistor (TFT) (T2), third thin film transistor (TFT) (T3) is closed, the master in line n m row pixel unit (5) Area's pixel electrode (51) is charged to identical voltage with time area's pixel electrode (52);When forward scan to the (n+1)th row pixel list When first (5), (n+1)th controlling grid scan line (G (n+1)) transmission high potential signal, all the first of the (n+1)th row pixel unit (5) Thin film transistor (TFT) (T1) is opened with the second thin film transistor (TFT) (T2) to primary area pixel electrode (51) and time area's pixel electrode (52) While charging, the positive control thin film transistor (TFT) (T5) for corresponding to line n pixel unit (5) setting is connected to (n+1)th grid Scan line (G (n+1)) and the row control separated time (40) corresponding to line n pixel unit (5) setting so that correspond to line n picture The row control separated time (40) of plain unit (5) setting transmits high potential signal, and all third films of line n pixel unit (5) are brilliant Body pipe (T3) is opened, and the charge in line n m row pixel unit (5) shares capacitance (C1) and drags down time area's pixel electrode (52) Voltage so that the voltage of secondary area's pixel electrode (52) is less than the voltage of primary area pixel electrode (51);
When reverse scan, the Reverse Turning Control thin film transistor (TFT) (T6) is opened;When reverse scan is to line n pixel unit (5), Nth bar controlling grid scan line (G (n)) transmits high potential signal, all first film transistors (T1) of line n pixel unit (5) It is opened with the second thin film transistor (TFT) (T2), third thin film transistor (TFT) (T3) is closed, the master in line n m row pixel unit (5) Area's pixel electrode (51) is charged to identical voltage with time area's pixel electrode (52);When reverse scan to the (n-1)th row pixel list When first (5), (n-1)th controlling grid scan line (G (n-1)) transmission high potential signal, all the first of the (n-1)th row pixel unit (5) Thin film transistor (TFT) (T1) is opened with the second thin film transistor (TFT) (T2) to primary area pixel electrode (51) and time area's pixel electrode (52) While charging, the Reverse Turning Control thin film transistor (TFT) (T6) for corresponding to line n pixel unit (5) setting is connected to (n-1)th grid Scan line (G (n-1)) and the row control separated time (40) corresponding to line n pixel unit (5) setting so that correspond to line n picture The row control separated time (40) of plain unit (5) setting transmits high potential signal, and all third films of line n pixel unit (5) are brilliant Body pipe (T3) is opened, and the charge in line n m row pixel unit (5) shares capacitance (C1) and drags down time area's pixel electrode (52) Voltage so that the voltage of secondary area's pixel electrode (52) is less than the voltage of primary area pixel electrode (51).
4. array substrate as claimed in claim 3, which is characterized in that the primary area pixel electrode (51) and time area's pixel electrode (52) it is " rice " font structure, material is ITO.
5. a kind of liquid crystal display panel, which is characterized in that including be oppositely arranged array substrate (1), colored filter substrate (2) and The PSVA liquid crystal layers (3) being configured between array substrate (1) and colored filter substrate (2);The PSVA liquid crystal layers (3) include Polymeric layer (31) and the liquid crystal (32) being scattered in the polymeric layer (31);The array substrate (1) be claim 3 to 4 any one of them array substrates.
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CN105527737B (en) * 2016-02-01 2019-01-22 深圳市华星光电技术有限公司 Liquid crystal display panel and its driving method
CN107068690B (en) * 2017-03-10 2020-02-21 京东方科技集团股份有限公司 Array substrate, pixel electrode charging method of array substrate and display device
CN107121862B (en) * 2017-06-23 2020-04-10 深圳市华星光电技术有限公司 Liquid crystal panel and driving display method thereof
CN107300815B (en) * 2017-08-14 2020-06-05 深圳市华星光电技术有限公司 Array substrate, liquid crystal display panel and dot inversion driving method thereof
CN107703690B (en) 2017-09-26 2020-07-31 武汉华星光电技术有限公司 Array substrate and display panel
CN107818770A (en) * 2017-10-25 2018-03-20 惠科股份有限公司 The drive device and method of display panel
CN108169969B (en) * 2017-12-26 2020-09-18 深圳市华星光电技术有限公司 Array substrate and liquid crystal display panel

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