WO2015000258A1 - 液晶像素单元驱动方法、驱动装置及液晶显示装置 - Google Patents

液晶像素单元驱动方法、驱动装置及液晶显示装置 Download PDF

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Publication number
WO2015000258A1
WO2015000258A1 PCT/CN2013/088439 CN2013088439W WO2015000258A1 WO 2015000258 A1 WO2015000258 A1 WO 2015000258A1 CN 2013088439 W CN2013088439 W CN 2013088439W WO 2015000258 A1 WO2015000258 A1 WO 2015000258A1
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Prior art keywords
liquid crystal
shared
pixel unit
pixel electrode
crystal pixel
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English (en)
French (fr)
Inventor
严允晟
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to US14/382,172 priority Critical patent/US9666153B2/en
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Anticipated expiration legal-status Critical
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    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136213—Storage capacitors associated with the pixel 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0469—Details of the physics of pixel operation
    • G09G2300/0478—Details of the physics of pixel operation related to liquid crystal pixels
    • G09G2300/0491—Use of a bi-refringent liquid crystal, optically controlled bi-refringence [OCB] with bend and splay states, or electrically controlled bi-refringence [ECB] for controlling the color
    • 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
    • G09G2300/0823—Several active elements per pixel in active matrix panels used to establish symmetry in driving, e.g. with polarity inversion
    • 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
    • G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than 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
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G3/3614—Control of polarity reversal in general

Definitions

  • the invention belongs to the technical field of liquid crystal display, and in particular relates to a liquid crystal pixel unit driving method and device. Background technique
  • each liquid crystal pixel unit corresponds to a minimum independently controllable display point on the display screen (ie, each liquid crystal pixel The unit corresponds to one sub-pixel), and in each liquid crystal pixel unit, the liquid crystal molecules are tilted in a specific direction (ie, orientation) by vertical alignment (ie, perpendicular to the surface of the display panel) under the driving voltage;
  • the light power is determined by the angle between the liquid crystal molecules and the light.
  • the liquid crystal molecules in a liquid crystal pixel unit have the same direction (the orientation and the tilt angle are the same), the brightness of the liquid crystal pixel unit is different at different positions (liquid crystal pixel unit shot).
  • the direction of light to different positions is different, and the angle with the liquid crystal molecules is also different), which affects the display effect.
  • each liquid crystal pixel unit is actually divided into a plurality of domains, the direction of the liquid crystal molecules in each domain is the same, the directions of the liquid crystal molecules in different domains are different (the orientation and/or the tilt angle are different), and the average of the domains is The effect can reduce the difference in brightness of the liquid crystal pixel unit at different positions.
  • Another method is to set a plurality of pixel electrodes with different voltages in each liquid crystal pixel unit (that is, a plurality of pixel electrodes are used together to display the contents of one sub-pixel), so that liquid crystal molecules corresponding to different pixel electrodes have different tilt angles.
  • these two methods can be combined, for example, in the SPVA mode (Super Patterned Vertical Alignment) liquid crystal display device, each liquid crystal pixel unit has a plurality of pixel electrodes, and each pixel electrode Corresponding to a plurality of orientation domains.
  • CS-SPVA mode liquid crystal display device using a charge sharing (CS) technology has been proposed. As shown in FIG.
  • a low-voltage pixel electrode 11 and a high-voltage pixel electrode 12 are disposed in each liquid crystal pixel unit of a CS-SPVA mode, and the two pixel electrodes 11, 12 pass through two charging film transistors TCI and TC2, respectively. (all controlled by the charge gate line GC) is connected to a data line Data, and the low voltage pixel electrode 11 is also connected to the source of the first shared thin film transistor TS (controlled by the shared gate line GS), the drain of the first shared thin film transistor TS The first shared capacitor CS1 is connected to the other end, and the other end of the first shared capacitor CS1 is connected to the common electrode line Com. As shown in FIG.
  • the charging gate line GC provides a charging on signal, so that the two pixel electrodes 11, 12 are charged to the same voltage by the data line Data;
  • the first time At very few microseconds to tens of microseconds, equivalent to one hundredth of the display period
  • the shared gate line GS is provided to provide a shared turn-on signal, so that the low voltage is low.
  • the pixel electrode 11 is charge-shared with the first shared capacitor CS1, and the voltage of the low-voltage pixel electrode 11 is lowered (the polarity of the charge is reversed due to the polarity inversion).
  • An example of the CS-SPVA mode liquid crystal pixel unit may vary in circuit structure, number of pixel electrodes, number of orientation domains per pixel electrode, and the like.
  • the voltage referred to in the liquid crystal display refers to the voltage used to drive the liquid crystal pixel unit, so the "high voltage” and “low voltage” of the pixel electrode do not refer to absolute voltage values (or are not compared with the ground voltage). Rather, it refers to the absolute value of the difference between the pixel electrode voltage and the common electrode voltage, that is, the larger the absolute value of the difference between the voltage of the pixel electrode and the common electrode voltage (which may be higher or lower), the more the pixel electrode voltage High, otherwise the pixel electrode voltage is smaller; and the "polarity" of the voltage is not compared with the ground voltage, but relative to the common electrode voltage.
  • the pixel electrode voltage is opposite to the shared capacitor voltage. It means that the pixel electrode voltage and the shared capacitor voltage are one greater than the common electrode voltage and the other is smaller than the common electrode voltage.
  • the technical problem to be solved by the present invention includes providing a liquid crystal pixel unit driving method and apparatus with good display effect, in view of the problem that the display effect of the existing liquid crystal pixel unit is still not satisfactory.
  • the technical solution for solving the technical problem of the present invention is a liquid crystal pixel unit driving method, the liquid crystal pixel unit includes a first pixel electrode, a second pixel electrode, and a first shared capacitor; and the liquid crystal pixel unit driving method includes:
  • the shared conduction signal is provided at a first interval, the first shared capacitor is electrically connected to the first pixel electrode, and the voltage of the first pixel electrode is changed; the first time is greater than or equal to 1/10 of the display period. And less than or equal to 3/4 display period.
  • the "display period” refers to the time between two refreshing (ie, the driving voltage change) of one liquid crystal pixel unit, that is, the time between the start ends of the two charging on signals, for the same liquid crystal display device, different
  • the display period of the liquid crystal pixel unit of the row (or column) is not synchronized, but the display period of each liquid crystal pixel unit is equal in length, and usually the time of one display period is the duration of the "one frame" image, about the number From milliseconds to tens of milliseconds.
  • the interval between the shared conduction signal and the charging conduction signal is short, that is, the time at which the low voltage pixel electrode is at the data signal voltage is very long. Short, so the low-voltage pixel electrode "equal to" the voltage that has been changing (because its time under the data signal voltage is too short to affect the display effect).
  • the interval between the sharing of the on signal and the charging on signal (ie, the first time) is between 1/10 and 3/4 of the display period, that is, the present invention is no longer Try to shorten the first time as soon as possible to divide the domain, but creatively deliberately extend the first time, and thus achieve a better display.
  • the first pixel electrode ie, the low voltage pixel electrode
  • the first pixel electrode voltage Change after change
  • the voltage can also be maintained for a long time (at least 1/4 display period); that is, in one display period, the first pixel electrode will remain at two different voltages for a longer period of time, and the corresponding liquid crystal molecules will also
  • the two pixel electrodes are respectively held at two different tilt angles for a long time, so that the display effect of the first pixel electrode is an average of the display effects in two periods, or that the first pixel electrode doubles the number of domains by "time division", thereby
  • the display effect is improved; in the prior art, people only think of changing the direction of liquid crystal molecules in different domains, but it is never thought that the liquid crystal molecules in one domain also exhibit two different states in one display period.
  • the error of the capacitance value of the storage capacitor, the shared capacitor, etc. also affects the display quality; and according to the method of the present invention, the first time can be adjusted (thereby setting the first electrode at two different voltages) Time ratio) changes the display effect to compensate for the above error and achieve a better display effect.
  • the liquid crystal pixel unit is a VA mode liquid crystal pixel unit.
  • the first pixel electrode is connected to the drain of the first charging thin film transistor
  • the second pixel electrode is connected to the drain of the second charging thin film transistor
  • the first charging thin film transistor and the second charging thin film transistor are The source is connected to the same data line
  • the gate is connected to the same charging gate line
  • the data line is used to provide a data signal
  • the charging gate line is used to provide a charging on signal.
  • the first pixel electrode is connected to one end of the first shared capacitor through a shared thin film transistor, and the other end of the first shared capacitor is connected to the common electrode line, and the gate of the shared thin film transistor is connected to the shared gate line, and the shared gate is The pole line is used to provide a shared turn-on signal.
  • the liquid crystal pixel unit further includes: a second shared capacitor, wherein the second shared capacitor can be turned on with the first pixel electrode when the sharing conduction signal arrives, and the voltage of the second pixel electrode is changed.
  • the first pixel electrode is connected to one end of the first shared capacitor through a shared thin film transistor, the other end of the first shared capacitor is connected to the common electrode line, and the gate of the shared thin film transistor is connected to the shared gate line, and the sharing The gate line is configured to provide a shared turn-on signal; the second shared capacitor is connected to the second pixel electrode at one end, and the other end is connected to an end of the first shared capacitor away from the common electrode line.
  • the liquid crystal pixel unit performs polarity inversion in two adjacent display periods.
  • each pixel electrode corresponds to at least two orientation domains.
  • the first time is greater than or equal to 1/10 display period and less than or equal to 1/4 display period.
  • the first time is greater than or equal to 1/4 of the display period and less than or equal to 3/4 of the display period.
  • the solution to solve the technical problem of the present invention is a liquid crystal pixel unit driving device, wherein the liquid crystal pixel unit includes a first pixel electrode, a second pixel electrode, and a first shared capacitor; and the liquid crystal pixel unit driving device includes a data driving module, configured to provide a data signal to the liquid crystal pixel unit; a charging driving module, configured to provide a charging conduction signal to the liquid crystal pixel unit, so that the data signal charges the first pixel electrode and the second pixel electrode to an equal voltage;
  • a shared driving module configured to provide a shared conduction signal to the liquid crystal pixel unit, to make the first shared capacitor and the first pixel electrode conduct and change a voltage of the first pixel electrode; and a time control module for controlling the shared driving module in the charging guide
  • the shared ON signal is provided to the liquid crystal pixel unit at a first time interval after the end of the pass signal, wherein the first time is greater than or equal to 1/10 display period and less than or equal to 3/4 display period.
  • the liquid crystal pixel unit driving device of the present invention has a time control module, the liquid crystal pixel unit driving method described above is adopted, so that the number of domains is larger, the capacitance value error can be compensated, and the display effect is better.
  • the present invention also provides a liquid crystal display device comprising the above liquid crystal pixel unit driving device.
  • the liquid crystal pixel unit is a liquid crystal pixel unit of a VA mode.
  • the liquid crystal pixel unit further includes: a second shared capacitor, wherein the second shared capacitor can be turned on with the first pixel electrode when the shared turn-on signal arrives, and the voltage of the second pixel electrode is changed.
  • the data driving module is liquid
  • the data signals provided by the crystal pixel unit are all reversed in polarity.
  • the liquid crystal pixel unit driving method of the present invention is suitable for a VA mode liquid crystal display device, and is particularly suitable for a CS-SPVA mode liquid crystal display device.
  • FIG. 1 is an equivalent circuit diagram of a liquid crystal pixel unit of a CS-SPVA mode
  • FIG. 2 is a schematic timing diagram of a conventional liquid crystal pixel unit driving method
  • FIG. 3 is a liquid crystal pixel unit driving method according to Embodiment 2 of the present invention; Schematic timing diagram;
  • FIG. 4 is an equivalent circuit diagram of another liquid crystal pixel unit of the CS-SPVA mode according to Embodiment 3 of the present invention.
  • Figure 5 is a schematic timing chart of a liquid crystal pixel cell driving method of Embodiment 3 of the present invention.
  • reference numerals are: 11, low voltage pixel electrode; 12, high voltage pixel electrode; GC:, charging gate line; GS, shared gate line; Com, common electrode line; Data, data line; TC1, first charging film Transistor; TC2, second charge thin film transistor; TS, shared thin film transistor; CS1, first shared capacitor; CS2, second shared capacitor; Cl1, first storage capacitor; C12, second storage capacitor; .
  • the present embodiment provides a liquid crystal pixel unit driving method, the liquid crystal pixel unit includes a first pixel electrode, a second pixel electrode, and a first shared capacitor; and the liquid crystal pixel unit driving method includes:
  • the shared conduction signal is provided at a first interval, the first shared capacitor is electrically connected to the first pixel electrode, and the voltage of the first pixel electrode is changed; the first time is greater than or equal to 1/10 of the display period. And less than or equal to 3/4 display period.
  • the interval between the shared conduction signal and the charging conduction signal is short, that is, the time at which the low voltage pixel electrode is at the data signal voltage is very long. Short, so the low-voltage pixel electrode "equal to" the voltage that has been changing (because its time under the data signal voltage is too short to affect the display effect).
  • the interval between the sharing of the on signal and the charging on signal ie, the first time is between 1/10 and 3/4 of the display period, that is, the embodiment does not.
  • the first pixel electrode ie, the low voltage pixel electrode
  • the first pixel electrode voltage Change the changed voltage can also be kept for a long time (at least 1/4 display period); that is, in one display period, the first pixel electrode will be kept at two different voltages for a longer time, corresponding to The liquid crystal molecules are also kept at two different tilt angles for a long time, so the display effect of the first pixel electrode is the average of the display effects in two periods, or the first pixel electrode increases the number of domains by "time division".
  • each liquid crystal pixel unit includes a low voltage pixel electrode 11 (i.e., a first pixel electrode) and a high voltage pixel electrode 12 (i.e., a second pixel electrode).
  • the two pixel electrodes 11, 12 are respectively connected to the same data line Data through two charging thin film transistors (the first charging thin film transistor TC1 and the second charging thin film transistor TC2), and the two charging thin film transistors TC1, TC2
  • the gates are each connected to a charge gate line GC (for providing a charge on signal). That is to say, the charging of the two pixel electrodes 11, 12 is controlled by the two charging thin film transistors TC1, TC2, but the two charging thin film transistors TC1, TC2 are controlled by a charging gate line GC.
  • the low-voltage pixel electrode 11 is further connected to the source of the shared thin film transistor TS, the drain of the shared thin film transistor TS is connected to the first shared capacitor CS1-end, and the other end of the first shared capacitor CS1 is connected to the common electrode line Com, and the shared film is shared.
  • the gate of the transistor TS is connected to the shared gate line GS (for providing a shared turn-on signal); wherein, the source and the drain of the shared thin film transistor TS refer to two electrodes connected by the active region of the thin film transistor, There is no difference in the role of the person, so when the direction of the current in the shared thin film transistor TS changes, the source and the drain do not change.
  • Charge sharing between the low voltage pixel electrode 11 and the first shared capacitor CS 1 can be achieved by simply adding a shared capacitor and a shared thin film transistor TS.
  • the liquid crystal pixel unit is a VA mode liquid crystal pixel unit; that is, the two pixel electrodes 11 and 12 are located on the array substrate, and the common electrode is located on the color filter substrate, and when there is no driving voltage, The liquid crystal molecules are distributed in a direction perpendicular to the surface of the display panel, and under the action of the driving voltage, the liquid crystal molecules are gradually inclined.
  • the liquid crystal pixel unit driving method of the embodiment can increase the number of domains of the liquid crystal pixel unit by "time division", and the increase of the number of domains is most effective for improving the display effect of the VA mode liquid crystal pixel unit, so the liquid crystal pixel unit of the mode is preferred. of.
  • each pixel electrode corresponds to at least two orientation domains. That is, in Under the driving voltage, the liquid crystal molecules corresponding to the same pixel electrode are inclined at least in two different directions, wherein liquid crystal molecules inclined in the same direction correspond to one orientation domain.
  • the method of dividing the liquid crystal pixel unit into a plurality of orientation domains is known and diverse. For example, a specific protrusion, an alignment layer, and the like can be disposed in the liquid crystal pixel unit, and will not be described in detail herein.
  • the liquid crystal pixel unit driving method of the present embodiment can increase the number of domains of the liquid crystal pixel unit, but if each pixel electrode itself already corresponds to a plurality of orientation domains, the effect of increasing the number of domains is more remarkable. For example, if each of the pixel electrodes corresponds to four orientation domains, the liquid crystal pixel unit itself is eight domains, and when the driving method of the embodiment is used, the number of domains of the low-voltage pixel electrode 11 is doubled to become eight domains, and the liquid crystal pixel is The unit as a whole will achieve the effect of 12 domains.
  • liquid crystal pixel unit should also include other known structures, such as a structure for forming the first storage capacitor C11 and the second storage capacitor C12 with the low voltage pixel electrode 11 and the high voltage pixel electrode 12, respectively, and will not be described in detail herein.
  • each liquid crystal pixel unit actually corresponds to a minimum point (pixel or sub-pixel) on the liquid crystal display device that can be independently displayed. Therefore, each liquid crystal display device actually includes a plurality of liquid crystal pixel units arranged in an array.
  • Each of the charging gate lines GC and the shared gate lines GS should be connected to a plurality of liquid crystal pixel units in one row at the same time, and one data line Data should be connected to a plurality of liquid crystal pixel units in one column. That is to say, when the liquid crystal pixel unit is driven, the actual driving process is performed simultaneously for a plurality of liquid crystal pixel units, but in the present embodiment, only the driving of one liquid crystal pixel unit will be described as an example.
  • the driving method of the liquid crystal pixel unit of this embodiment includes the following steps:
  • a charging conduction signal is provided through the charging gate line GC, so that the data line Data charges the high voltage pixel electrode 12 and the low voltage pixel electrode 11 to achieve the data signal voltage.
  • a high level signal ie, a charge on signal
  • the first charge thin film transistor TC1 and the second charge thin film transistor TC2 are turned on, thereby data Data signal in line Data (pair
  • the data signal of the liquid crystal pixel unit should be passed to the high voltage pixel electrode 12 and the low voltage pixel electrode 11, and the two pixel electrodes 11, 12 are simultaneously charged to the data signal voltage.
  • the duration of the charging on signal is very short, usually in the order of several microseconds to several tens of microseconds.
  • the liquid crystal pixel unit performs polarity inversion in two adjacent display periods.
  • the driving mode of the liquid crystal pixel unit is preferably such that the polarity is reversed with respect to the previous display period for each display period, that is, the pole of the driving voltage loaded in the liquid crystal pixel unit in two adjacent display periods.
  • the opposite is true; that is, if the difference between the pixel electrode voltage and the common electrode voltage in a display period is greater than 0V, the difference between the pixel electrode voltage and the common electrode voltage is less than 0V in the display period before and after it. , vice versa.
  • each liquid crystal pixel unit is subjected to polarity inversion, but for the entire liquid crystal display device, the polarity is reversed in various ways, such as frame inversion, column inversion, and line inversion. And so on are feasible.
  • the high voltage pixel electrode 12 and the low voltage pixel electrode 11 respectively maintain the voltage at the last moment of the previous display period, the polarity of the voltage of the first shared capacitor CS1 and the polarity of the voltage of the low voltage pixel electrode 11 The same (for example, both lower than the common electrode voltage); and after the charging is completed, the high voltage pixel electrode 12 and the low voltage pixel electrode 11 both reach the data signal voltage of the present display period whose polarity is opposite to the previous period data signal voltage (eg, higher than The common electrode voltage), at this time, the voltage of the first shared capacitor CS1 does not change, so the polarity of the voltage of the low-voltage pixel electrode 11 is opposite to the polarity of the voltage of the first shared capacitor CS1.
  • the shared conduction signal is provided through the shared charging gate line GC at a first interval A t, so that the first shared capacitor CS1 and the low voltage pixel electrode 11 are electrically connected (ie, electrically connected) and changed.
  • the voltage of the low voltage pixel electrode 11; wherein the first time At is greater than or equal to 1/10 of the display period and less than or equal to 3/4 of the display period.
  • a high level signal ie, a shared turn-on signal
  • a high level signal is supplied to the shared gate line GS for a long period of time (about zero milliseconds to several milliseconds), thereby making the shared thin film transistor TS Conduction, first shared capacitor CS1 and low voltage
  • the pixel electrode 11 is electrically connected, charge sharing occurs therebetween, and the voltage of the low voltage pixel electrode 11 is pulled low (here, "pull down” means that the voltage of the low voltage pixel electrode 11 becomes closer to the common electrode voltage), thereby high voltage
  • the voltage of the pixel electrode 12 produces a difference.
  • the time interval between the charging on signal and the shared on signal is only several tens of microseconds, that is, the low voltage pixel electrode 11 is only kept at the data signal voltage for a short time, after The voltage is pulled low; and since the rotation of the liquid crystal molecules takes a certain time, the liquid crystal molecules corresponding to the low-voltage pixel electrode 11 cannot be rotated in such a short time (even if it is rotated, the visual effect is not sufficient); From the display effect, the low-voltage pixel electrode 11 is equivalent to being at the same voltage (ie, the voltage after being pulled down) for one display period.
  • the low voltage pixel electrode 11 is kept at a voltage of the data signal and the voltage after being pulled down for a long time in one display period, which corresponds to
  • the liquid crystal molecules are also kept at two different tilt angles for a long time, that is, the liquid crystal molecules corresponding to the low-voltage pixel electrode 11 respectively exhibit two different states in one display period, thereby causing the domains to be "time-divided".
  • the number is doubled to achieve a better display effect; that is, the inventive method changes the conventional practice in the prior art that the direction of the liquid crystal molecules of each domain remains unchanged in one display period, but makes one domain in one
  • the display period has two different orientations in succession, thereby functioning as two domains to further increase the number of domains.
  • the visual effect is the average of the visual effects in the two periods, that is, in the data.
  • the display content obtained by the method according to the embodiment and the method of the prior art ie, the visible brightness of the liquid crystal pixel unit
  • Adjusting the data signal voltage, the capacitance value of the first shared capacitor CS1, etc. for example, reducing the data signal voltage and/or increasing the first shared capacitor
  • the first time A t is greater than or equal to 1/4 of the display period and less than or equal to 3/4 Display cycle. It has been found that when the first time A t is greater than or equal to 1/4 of the display period and less than or equal to 3/4 of the display period, the holding time of the low-voltage pixel electrode 11 at the two voltages is relatively close, so that the best is achieved. Improve the number of domains and improve the display effect.
  • the first time A t is greater than or equal to 1/10 of the display period and less than or equal to 1/4 of the display period. It has been found that when the first time A t is greater than or equal to 1/10 of the display period and less than or equal to 1/4 of the display period, the effect of increasing the number of domains is relatively small (because its time under the data signal voltage is short), However, the display content can be adjusted to compensate for display errors caused by inaccurate capacitance values such as storage capacitors and shared capacitors.
  • this embodiment provides a driving method of a liquid crystal pixel unit.
  • the liquid crystal pixel unit of the present embodiment has a structure similar to that of the liquid crystal pixel unit of the second embodiment, except that the liquid crystal pixel unit of the embodiment further includes a second shared capacitor CS2, the second The shared capacitor CS2 can be turned on with the low voltage pixel electrode 11 when the shared turn-on signal comes, and the voltage of the high voltage pixel electrode 12 is changed.
  • the second shared capacitor CS2 is connected to the high voltage pixel electrode 12, and the other end is connected to the end of the first shared capacitor CS1 away from the common electrode line Com (ie, the end of the shared thin film transistor TS).
  • the process of providing a signal in the driving method of the liquid crystal pixel unit of the present embodiment is the same as that of the above-described second embodiment, except that the voltage sharing process is different due to the addition of the second shared capacitor CS2.
  • the high voltage pixel electrode 12 has a high voltage
  • the low voltage pixel electrode 11 has a low voltage
  • the voltage polarities of the pixel electrodes 11, 12 and the shared capacitors CS1, CS2 are the same (eg, both are lower than the common Electrode voltage); when the charging on signal arrives, both pixel electrodes 11, 12 reach the data signal voltage (polarity and last week)
  • both pixel electrodes 11, 12 reach the data signal voltage (polarity and last week)
  • both polarity of the voltage in the first shared capacitor CS1 is constant
  • the polarity of the voltage in the second shared capacitor CS2 is changed.
  • the two shared capacitors CS1 and CS2 are connected in series.
  • the voltage distribution between the common electrode voltage and the data signal voltage is determined by the capacity ratio of the two; when the shared conduction signal comes, the first shared capacitor CS1 is turned on with the low voltage pixel electrode 11 (while the second shared capacitor) CS2 is also turned on with the low voltage pixel electrode 11), so that the first shared capacitor CS1 pulls down the voltage of the low voltage pixel electrode 11, and the second shared capacitor CS2 raises the voltage of the high voltage pixel electrode 12 to realize the two pixel electrodes 11, 12 The voltage is different.
  • the second shared capacitor CS2 by setting the second shared capacitor CS2, not only the voltage of the low-voltage pixel electrode 11 is pulled down, but also the voltage of the high-voltage pixel electrode 12 is raised in one display period, that is, The two pixel electrodes 11, 12 are each held at two different voltages for a certain period of time, so that the effect of increasing the number of domains is more remarkable (because the number of domains of the high-voltage pixel electrode 12 is also doubled), and the display effect can be more effectively improved.
  • the liquid crystal pixel unit driving method wherein the liquid crystal pixel unit may also be other different structures; for example, a third pixel electrode (such as a medium voltage pixel electrode) may be further included, or in addition, more shared capacitors and the like may be included; however, as long as the liquid crystal pixel unit includes at least two pixel electrodes, and each pixel electrode can realize different voltages by charge sharing under the action of the shared conduction signal, and the charging is turned on.
  • the time interval between the signal and the shared on signal is greater than or equal to 1/10 of the display period and less than or equal to 3/4 of the display period, which is within the scope of protection of the present invention.
  • Example 4 Example 4:
  • the embodiment of the present invention provides a liquid crystal pixel unit driving device, wherein the liquid crystal pixel unit includes a first pixel electrode, a second pixel electrode, and a first shared capacitor;
  • a data driving module configured to provide a data signal to the liquid crystal pixel unit; and a charging driving module, configured to provide a charging conduction signal to the liquid crystal pixel unit, so that The data signal charges the first pixel electrode and the second pixel electrode to an equal voltage;
  • a shared driving module configured to provide a shared conduction signal to the liquid crystal pixel unit, to make the first shared capacitor and the first pixel electrode conduct and change the first pixel a voltage of the electrode;
  • a time control module configured to control the shared driving module to provide a shared conduction signal to the liquid crystal pixel unit at a first time interval after the end of the charging on signal, wherein the first time is greater than or equal to 1/10 of the display period and Less than or equal to 3/4 display period.
  • the liquid crystal pixel unit driving device of the present embodiment has a time control module, the liquid crystal pixel unit driving method described above is employed, so that the number of domains is larger, the capacitance error can be compensated, and the display effect is better.
  • the data driving module may be a data driver chip (Data Driver IC), and the charging driving module, the shared driving module, and the time control module may be integrated into a gate.
  • Driver chip Data Driver IC
  • liquid crystal pixel unit driving device of the present embodiment is driven by driving one liquid crystal pixel unit as an example, in practice, it can simultaneously drive a plurality of liquid crystal pixel units; for example, each liquid crystal pixel unit driving device A plurality of data driving chips and a plurality of gate driving chips may be included, and each driving chip may be connected to a plurality of leads.
  • the liquid crystal pixel unit is a liquid crystal pixel unit of a VA mode.
  • the liquid crystal pixel unit further includes: a second shared capacitor, wherein the second shared capacitor can be turned on with the first pixel electrode when the shared turn-on signal arrives, and the voltage of the second pixel electrode is changed.
  • the data signals provided by the data driving module to the liquid crystal pixel unit are all reversed in polarity.

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Abstract

一种液晶像素单元驱动方法、驱动装置以及液晶显示装置，属于液晶显示技术领域，其可解决现有的液晶像素单元显示效果不理想的问题。其中液晶像素单元包括第一像素电极（11）、第二像素电极（12）、第一共享电容（CS1）；所述液晶像素单元驱动方法包括：提供充电导通信号，使数据信号将第一像素电极（11）和第二像素电极（12）充电至相等电压；充电导通信号结束号后，间隔第一时间（Δt）提供共享导通信号，使第一共享电容（CS1）与第一像素电极（11）导通并改变第一像素电极（11）的电压；所述第一时间（Δt）大于等于1/10显示周期且小于等于3/4显示周期。所述液晶像素单元驱动方法适用于VA模式的液晶显示装置，尤其适用于CS-SPVA模式的液晶显示装置。

Description

液晶像素单元驱动方法、 驱动装置及液晶显示装置 技术领域
本发明属于液晶显示技术领域， 具体涉及一种液晶像素单元 驱动方法和装置。 背景技术
在 VA模式 (Vertical Alignment,竖直排列）的液晶显示装置中， 包括多个液晶像素单元， 其中每个液晶像素单元对应显示屏上的 一个最小的可独立控制的显示点（即每个液晶像素单元对应一个 亚像素）， 而在各液晶像素单元中， 在驱动电压作用下液晶分子会 由竖直排列（即垂直于显示面板表面）而向特定方向（即取向）倾斜； 由于液晶层的滤光能力由液晶分子与光的夹角决定， 故若某液晶 像素单元中的液晶分子方向相同（取向和倾斜角度相同），则在不同 位置上看该液晶像素单元的亮度不同（液晶像素单元射向不同位 置的光方向不同， 与液晶分子的夹角也不同）， 影响显示效果。
因此， 实际每个液晶像素单元均会被分成多个畴 (Domain), 每个畴中液晶分子方向相同， 不同畴中液晶分子方向不同（取向和 /或倾斜角度不同），通过各畴的平均作用可降低液晶像素单元在不 同位置的亮度差。 将液晶像素单元分畴的方法有两类， 一是改变 液晶分子取向（既设置多个 "取向畴" ), 其可通过设置凸起或不同 配向层实现， 也可通过改变像素电极的形状等实现； 另一类方法 是在每个液晶像素单元中设置多个电压不同的像素电极 (即多个 像素电极共同用于显示一个亚像素的内容)， 使对应不同像素电极 的液晶分子倾斜角度不同。 当然， 这两类方法可结合运用， 如在 SPVA模式 (Super Patterned Vertical Alignment,超级构型竖直排列 模式)液晶显示装置中， 每个液晶像素单元中有多个像素电极， 而 每个像素电极再对应多个取向畴。 为控制液晶像素单元中的各像素电极的电压， 人们提出利用 电荷共享 (CS, Charge Share)技术的 CS-SPVA模式液晶显示装置。 如图 1所示，一种 CS-SPVA模式的每个液晶像素单元中设有低压 像素电极 11和高压像素电极 12, 两像素电极 11、 12分别通过两 个充电（Charging)薄膜晶体管 TCI、 TC2(均由充电栅极线 GC控制） 连接一数据线 Data,低压像素电极 11还连接第一共享薄膜晶体管 TS (由共享栅极线 GS控制）的源极， 第一共享薄膜晶体管 TS的漏 极连接第一共享电容 CS1—端， 第一共享电容 CS1另一端连接公 共电极线 Com。 如图 2所示， 液晶像素单元的每个显示周期 (帧， Frame)开始时， 充电栅极线 GC提供充电导通信号，使两像素电极 11、 12被数据线 Data充电至相同电压； 充电导通信号结束后， 间 隔很短的第一时间 At (约数微秒至数十微秒，相当于显示周期的数 百分之一)共享栅极线 GS即提供共享导通信号， 使低压像素电极 11与第一共享电容 CS1发生电荷共享， 低压像素电极 11的电压 降低 (因存在极性反转， 故二者中电荷极性相反)。 当然， 以上只是
CS-SPVA模式液晶像素单元的一个例子， 其电路结构、 像素电极 数、 每个像素电极的取向畴数等均可变化。
应当理解， 在液晶显示中所称的电压是指用于驱动液晶像素 单元的电压， 故像素电极的 "高压" 和 "低压" 并不是指绝对的 电压值 (或者说不是与接地电压比较)，而是指像素电极电压与公共 电极电压间的差值的绝对值， 即像素电极的电压与公共电极电压 的差的绝对值越大 (可以是高于也可以是低于）则像素电极电压越 高， 反之则像素电极电压越小； 而电压的 "极性" 也并不是与接 地电压比较， 而是相对公共电极电压而言的， 例如， 像素电极电 压与共享电容电压 "极性相反" ， 是指像素电极电压与共享电容 电压一个大于公共电极电压， 另一个小于公共电极电压。
虽然现有的 CS-SPVA模式液晶显示装置可实现多畴效果，但 其畴数仍不够多； 同时， 由于制造工艺等的限制， 液晶显示装置 的存储电容、 共享电容等的电容值也可能存在误差， 而这会造成 像素电极上的电压不准确， 影响显示效果。 发明内容
本发明所要解决的技术问题包括， 针对现有的液晶像素单元 显示效果仍不理想的问题， 提供一种显示效果好的液晶像素单元 驱动方法和装置。
解决本发明技术问题所采用的技术方案是一种液晶像素单元 驱动方法， 所述液晶像素单元包括第一像素电极、 第二像素电极、 第一共享电容； 所述液晶像素单元驱动方法包括：
提供充电导通信号， 使数据信号将第一像素电极和第二像素 电极充电至相等电压；
充电导通信号结束后， 间隔第一时间提供共享导通信号， 使 第一共享电容与第一像素电极导通并改变第一像素电极的电压； 所述第一时间大于等于 1/10显示周期且小于等于 3/4显示周期。
其中， "显示周期" 是指一个液晶像素单元的两次刷新（即驱 动电压变更)之间的时间， 也就是两次充电导通信号开始端之间的 时间， 对同一个液晶显示装置， 不同行 (或列）的液晶像素单元的显 示周期是不同步的， 但各液晶像素单元的显示周期的时间长度相 等， 通常一个显示周期的时间即为 "一帧" 图像持续的时间， 约 在数毫秒至数十毫秒。
根据现有液晶像素单元驱动方法， 为尽快使两像素电极的电 压不同以实现分畴， 其共享导通信号与充电导通信号的间隔很短， 即低压像素电极处在数据信号电压的时间很短， 故低压像素电极 "相当于" 一直处于变化后的电压（因其在数据信号电压下的时间 过短而不能影响显示效果）。 而本发明的液晶像素单元驱动方法 中， 共享导通信号与充电导通信号的间隔时间（即第一时间）在 1/10-3/4 显示周期间， 也就是说， 本发明不再是尽量缩短第一时 间以尽快分畴， 而是创造性的故意延长第一时间， 并由此实现了 更好的显示效果。 首先， 由于第一时间延长， 故第一像素电极 (即 低压像素电极)保持数据信号电压的时间较长 (至少 1/10 显示周 期）， 而当充电导通信号到来时， 第一像素电极电压变化， 变化后 的电压也可保持较长时间（至少 1/4显示周期）； 也就是说， 在一个 显示周期中， 第一像素电极会分别在两个不同电压保持较长时间， 其对应的液晶分子也会分别在两个不同倾斜角度保持较长时间， 故第一像素电极的显示效果是两段时间内显示效果的平均， 或者 说第一像素电极通过 "时分" 作用使畴数增加了一倍， 从而改善 了显示效果； 而在现有技术中， 人们只想到改变不同畴中液晶分 子的方向， 却从未想到在一个显示周期中使一个畴中的液晶分子 也呈现两种不同状态。 另外， 如前所述， 存储电容、 共享电容等 的电容值的误差也会影响显示质量； 而根据本发明的方法， 可通 过调整第一时间（由此设置第一电极在两不同电压下的时间比）改 变显示效果， 从而补偿上述误差， 实现更好的显示效果。 优选的是， 所述液晶像素单元为 VA模式的液晶像素单元。 优选的是， 所述第一像素电极连接第一充电薄膜晶体管的漏 极， 所述第二像素电极连接第二充电薄膜晶体管的漏极； 所述第 一充电薄膜晶体管和第二充电薄膜晶体管的源极连接同一条数据 线， 栅极连接同一条充电栅极线， 所述数据线用于提供数据信号， 所述充电栅极线用于提供充电导通信号。
优选的是， 所述第一像素电极通过共享薄膜晶体管连接第一 共享电容一端， 第一共享电容另一端连接公共电极线， 所述共享 薄膜晶体管的栅极连接共享栅极线， 所述共享栅极线用于提供共 享导通信号。
优选的是， 所述液晶像素单元还包括： 第二共享电容， 在共 享导通信号到来时所述第二共享电容能与第一像素电极导通， 并 改变第二像素电极的电压。
进一步优选的是， 所述第一像素电极通过共享薄膜晶体管连 接第一共享电容一端， 第一共享电容另一端连接公共电极线， 所 述共享薄膜晶体管的栅极连接共享栅极线， 所述共享栅极线用于 提供共享导通信号； 所述第二共享电容一端连接第二像素电极， 另一端连接第一共享电容远离公共电极线的一端。 优选的是， 所述液晶像素单元在相邻的两个显示周期中均进 行极性反转。
优选的是， 每个像素电极对应至少两个取向畴。
优选的是， 所述第一时间大于等于 1/10显示周期且小于等于 1/4显示周期。
优选的是， 所述第一时间大于等于 1/4显示周期且小于等于 3/4显示周期。 解决本发明技术问题所采用的技术方案是一种液晶像素单 元驱动装置， 其中， 所述液晶像素单元包括第一像素电极、 第二 像素电极、 第一共享电容； 所述液晶像素单元驱动装置包括： 数据驱动模块， 用于向液晶像素单元提供数据信号； 充电驱动模块， 用于向液晶像素单元提供充电导通信号，使 数据信号将第一像素电极和第二像素电极充电至相等电压；
共享驱动模块， 用于向液晶像素单元提供共享导通信号，使 第一共享电容与第一像素电极导通并改变第一像素电极的电压； 时间控制模块，用于控制共享驱动模块在充电导通信号结束 后间隔第一时间向液晶像素单元提供共享导通信号， 其中， 所述 第一时间大于等于 1/10显示周期且小于等于 3/4显示周期。
由于本发明的液晶像素单元驱动装置中具有时间控制模块， 故其采用的是上述的液晶像素单元驱动方法， 因此其畴数更多、 可弥补电容值误差， 显示效果更好。
本发明还提供一种液晶显示装置， 其包括上述的液晶像素单 元驱动装置。 优选的， 所述液晶像素单元为 VA模式的液晶像素单元。 优选的， 所述液晶像素单元还包括： 第二共享电容， 在共享 导通信号到来时所述第二共享电容能与第一像素电极导通，并改 变第二像素电极的电压。
优选的，在相邻的两个显示周期中， 所述数据驱动模块向液 晶像素单元提供的数据信号均进行极性反转。
本发明的液晶像素单元驱动方法适用于 VA模式的液晶显示 装置， 尤其适用于 CS-SPVA模式的液晶显示装置。 附图说明
图 1为一种 CS-SPVA模式的液晶像素单元的等效电路图； 图 2为现有的液晶像素单元驱动方法的示意性时序图； 图 3为本发明的实施例 2的液晶像素单元驱动方法的示意性 时序图；
图 4为本发明的实施例 3的另一种 CS-SPVA模式的液晶像素 单元的等效电路图；
图 5为本发明的实施例 3的液晶像素单元驱动方法的示意性 时序图；
其中附图标记为： 11、 低压像素电极； 12、 高压像素电极； GC：、 充电栅极线； GS、 共享栅极线； Com、 公共电极线； Data、 数据线； TC1、 第一充电薄膜晶体管； TC2、 第二充电薄膜晶体管； TS、 共享薄膜晶体管； CS1、 第一共享电容； CS2、 第二共享电容; Cl l、 第一存储电容； C12、 第二存储电容； At: 第一时间。 具体实施方式
为使本领域技术人员更好地理解本发明的技术方案， 下面结 合附图和具体实施方式对本发明作进一步详细描述。 实施例 1 :
本实施例提供一种液晶像素单元驱动方法， 所述液晶像素单 元包括第一像素电极、 第二像素电极、 第一共享电容； 所述液晶 像素单元驱动方法包括：
提供充电导通信号， 使数据信号将第一像素电极和第二像素 电极充电至相等电压；
充电导通信号结束后， 间隔第一时间提供共享导通信号， 使 第一共享电容与第一像素电极导通并改变第一像素电极的电压； 所述第一时间大于等于 1/10显示周期且小于等于 3/4显示周期。
根据现有液晶像素单元驱动方法， 为尽快使两像素电极的电 压不同以实现分畴， 其共享导通信号与充电导通信号的间隔很短， 即低压像素电极处在数据信号电压的时间很短， 故低压像素电极 "相当于" 一直处于变化后的电压（因其在数据信号电压下的时间 过短而不能影响显示效果)。 而本实施例的液晶像素单元驱动方法 中， 共享导通信号与充电导通信号的间隔时间（即第一时间）在 1/10-3/4 显示周期间， 也就是说， 本实施例不再是尽量缩短第一 时间以尽快分畴， 而是创造性的故意延长第一时间， 并由此实现 了更好的显示效果。首先，由于第一时间延长，故第一像素电极 (即 低压像素电极)保持数据信号电压的时间较长 (至少 1/10 显示周 期）， 而当充电导通信号到来时， 第一像素电极电压变化， 变化后 的电压也可保持较长时间（至少 1/4显示周期）； 也就是说， 在一个 显示周期中， 第一像素电极会分别在两个不同电压保持较长时间， 其对应的液晶分子也会分别在两个不同倾斜角度保持较长时间， 故第一像素电极的显示效果是两段时间内显示效果的平均， 或者 说第一像素电极通过 "时分" 作用使畴数增加了一倍， 从而改善 了显示效果； 而在现有技术中， 人们只想到改变不同畴中液晶分 子的方向， 却从未想到在一个显示周期中使一个畴中的液晶分子 也呈现两周不同状态。 另外， 如前所述， 存储电容、 共享电容等 的电容值的误差也会影响显示质量； 而根据本实施例的方法， 可 通过调整第一时间（即第一电极在两不同电压下的时间比）改变显 示效果， 从而补偿上述误差， 实现更好的显示效果。 实施例 2:
如图 1、 图 3所示， 本实施例提供一种液晶像素单元的驱动 方法。 如图 1所示，每个液晶像素单元包括低压像素电极 11(即第一 像素电极)和高压像素电极 12(即第二像素电极)。
优选的， 两个像素电极 11、 12分别通过两个充电薄膜晶体管 (第一充电薄膜晶体管 TC1和第二充电薄膜晶体管 TC2)与同一条 数据线 Data相连， 而两个充电薄膜晶体管 TC1、 TC2的栅极均连 接一条充电栅极线 GC (用于提供充电导通信号）。 也就是说， 两个 像素电极 11、 12的充电是由两个充电薄膜晶体管 TC1、 TC2分另' J 控制的， 但这两个充电薄膜晶体管 TC1、 TC2是由一条充电栅极 线 GC控制的。
优选的，低压像素电极 11还连接共享薄膜晶体管 TS的源极， 共享薄膜晶体管 TS的漏极则连接第一共享电容 CS1—端， 第一 共享电容 CS1另一端连接公共电极线 Com,且共享薄膜晶体管 TS 的栅极连接共享栅极线 GS (用于提供共享导通信号)； 其中， 共享 薄膜晶体管 TS 的源极和漏极是指由该薄膜晶体管的有源区连接 的两个电极， 二者的作用并无差别， 故当共享薄膜晶体管 TS中的 电流方向发生变化时， 其源极和漏极并不改变。
只需增设一个共享电容和一个共享薄膜晶体管 TS 即可实现 低压像素电极 11与第一共享电容 CS 1间的电荷共享。
当然， 应当理解， 如果使用其他形式的共享电容也是可行的， 只要其能在共享导通信号的控制下改变低压像素电极 11的电压即 可。
优选的， 上述液晶像素单元为 VA模式的液晶像素单元； 也 就是说， 其两个像素电极 11、 12均位于阵列基板上， 而公共电极 则位于彩膜基板上， 且当没有驱动电压时其中的液晶分子是沿垂 直于显示面板表面的方向分布的， 而在驱动电压作用下， 液晶分 子逐渐倾斜。
本实施例的液晶像素单元驱动方法可通过 "时分" 作用增加 液晶像素单元的畴数， 而畴数的增加对 VA模式液晶像素单元的 显示效果改善最明显， 因此该模式的液晶像素单元是优选的。
优选的， 每个像素电极对应至少两个取向畴。 也就是说， 在 驱动电压作用下， 与同一个像素电极对应的液晶分子至少向两个 不同的方向倾斜， 其中向同一方向倾斜的液晶分子对应一个取向 畴。 其中， 将液晶像素单元分为多个取向畴的方法是已知且多样 的， 如可在液晶像素单元中设置特定的凸起、 配向层等， 在此不 再详细描述。
本实施例的液晶像素单元驱动方法可增加液晶像素单元的畴 数， 但若本身每个像素电极已经对应多个取向畴， 则其增加畴数 的效果会更加明显。 例如， 若每个像素电极均对应 4个取向畴， 则液晶像素单元本身为 8畴， 而当使用本实施例的驱动方法后， 低压像素电极 11畴数加倍， 变成 8畴， 则液晶像素单元整体将实 现 12畴的效果。
当然， 液晶像素单元中还应包括其他的已知结构， 例如与低 压像素电极 11和高压像素电极 12分别形成第一存储电容 C11和 第二存储电容 C12的结构等， 在此不再详细描述。
显然， 每个液晶像素单元实际对应液晶显示装置上的一个可 独立进行显示的最小点 (像素点或亚像素点）， 因此， 每个液晶显示 装置实际包括多个排成阵列的液晶像素单元，每条充电栅极线 GC 和共享栅极线 GS应同时连接一行中的多个液晶像素单元，而一条 数据线 Data则应连接一列中的多个液晶像素单元。 也就是说， 在 驱动液晶像素单元时， 实际的驱动过程是对多个液晶像素单元同 时进行的， 但本实施例中只以对一个液晶像素单元的驱动为例进 行说明。
具体的， 如图 3所示， 本实施例的液晶像素单元的驱动方法 包括以下步骤：
S01、通过充电栅极线 GC提供充电导通信号， 使数据线 Data 对高压像素电极 12和低压像素电极 11充电， 使二者均达到数据 信号电压。
也就是说， 在一个像素周期开始时， 为充电栅极线 GC提供 高电平的信号（即充电导通信号）， 使第一充电薄膜晶体管 TC1 和 第二充电薄膜晶体管 TC2导通，从而数据线 Data中的数据信号 (对 应该液晶像素单元的数据信号)传入高压像素电极 12 和低压像素 电极 11 , 并将两个像素电极 11、 12同时充电至数据信号电压。 其 中， 由于对像素电极的充电可在很短时间内完成， 因此， 充电导 通信号的持续时间很短， 通常在数微秒至数十微秒。
优选的， 液晶像素单元在相邻的两个显示周期中均进行极性 反转。
也就是说， 液晶像素单元的驱动方式优选为每个显示周期均 相对上个显示周期进行极性反转， 即在相邻的两个显示周期中， 加载在液晶像素单元中的驱动电压的极性相反； 也就是说， 若某 个显示周期中像素电极电压与公共电极电压的差值大于 0V, 则在 其之前和之后的显示周期中， 像素电极电压与公共电极电压的差 值均小于 0V, 反之亦然。
当然， 以上所述的是指每个液晶像素单元要进行极性反转， 但对于整个液晶显示装置， 其极性反转的方式是多样的， 如帧反 转、 列反转、 行反转等均是可行的。
如图 3所示， 在本步骤开始前， 高压像素电极 12和低压像素 电极 11分别保持上一个显示周期最后时刻的电压， 第一共享电容 CS1 电压的极性与低压像素电极 11 电压的极性相同（例如均低于 公共电极电压）； 而在充电完成后， 高压像素电极 12 和低压像素 电极 11均达到极性与上一周期数据信号电压相反的本显示周期的 数据信号电压 (如高于公共电极电压）， 此时第一共享电容 CS1 的 电压不变， 故低压像素电极 11 电压的极性与第一共享电容 CS1 电压的极性相反。
S02、 充电导通信号结束后， 间隔第一时间 A t, 通过共享充 电栅极线 GC提供共享导通信号， 使第一共享电容 CS1与低压像 素电极 11导通 (即实现电连接)并改变低压像素电极 11的电压；其 中，第一时间 A t大于等于 1/10显示周期且小于等于 3/4显示周期。
也就是说， 在充电完成后， 间隔一段较长的时间（约零点几毫 秒至数毫秒)再向共享栅极线 GS 提供高电平信号（即共享导通信 号）, 从而使共享薄膜晶体管 TS导通， 第一共享电容 CS1与低压 像素电极 11 电连接， 二者间发生电荷共享， 低压像素电极 11的 电压被拉低 (此处的 "拉低" 是指低压像素电极 11 的电压变得更 接近公共电极电压）， 从而与高压像素电极 12的电压产生区别。
其中， 根据现有技术的方式， 为了尽快实现分畴， 充电导通 信号与共享导通信号间的时间间隔只有数十微秒， 即低压像素电 极 11只在数据信号电压保持很短时间， 之后电压就被拉低； 而由 于液晶分子的旋转需要一定的时间， 故在如此短的时间内， 对应 低压像素电极 11 的液晶分子来不及旋转 (即使其发生旋转也不足 以视觉效果产生影响）； 这样， 从显示效果上说， 低压像素电极 11 相当于在一个显示周期中一直处于同一个电压（即被拉低后的电 压)。
而根据本实施例的驱动方法， 由于第一时间 A t较长， 故在一 个显示周期中， 低压像素电极 11会分别在数据信号电压和被拉低 后的电压保持较长时间， 其所对应的液晶分子也会在两个不同的 倾斜角度分别保持较长时间， 即低压像素电极 11对应的液晶分子 在一个显示周期中会分别呈现两种不同的状态， 从而通过 "时分" 作用使其畴数加倍， 达到更好的显示效果； 也就是说， 本发明创 造性的改变了现有技术中在一个显示周期中每个畴的液晶分子方 向保持不变的习惯作法， 而是使一个畴在一个显示周期中先后具 有两种不同的取向， 从而起到两个畴的作用， 以进一步提高畴数。
显然， 由于在一个显示周期中低压像素电极 11对应的液晶分 子会分别在两个不同倾斜角度保持较长时间， 因此其视觉效果是 这两段时间内视觉效果的平均， 也就是说， 在数据信号电压相等 的情况下， 根据本实施例的方法与现有技术的方法得到的显示内 容 (即液晶像素单元的可见亮度)是不一样的，为了保持显示内容的 统一， 本实施例中还要对数据信号电压、 第一共享电容 CS1的电 容值等进行调整 (例如降低数据信号电压和 /或提高第一共享电容
CS1的电容值)， 由于这些变化可由本领域技术人员根据具体需求 计算得到， 故在此不再详细描述。
优选的， 第一时间 A t大于等于 1/4显示周期且小于等于 3/4 显示周期。 经研究发现， 当第一时间 A t大于等于 1/4显示周期且 小于等于 3/4显示周期时， 其低压像素电极 11在两个电压下的保 持时间比较接近， 故可起到最好的提高畴数、 改善显示效果的作 用。
优选的， 第一时间 A t大于等于 1/10显示周期且小于等于 1/4 显示周期。经研究发现， 当第一时间 A t大于等于 1/10显示周期且 小于等于 1/4显示周期时， 其提高畴数的效果相对较小（因为其在 数据信号电压下的时间较短）， 但却可调整显示内容， 从而补偿因 存储电容、 共享电容等的电容值不准而引起的显示误差。
S03、 一个显示周期结束， 再次返回 S01步骤， 开始一个新的 显示周期， 如此循环直至显示结束。 实施例 3:
如图 4、 图 5所示， 本实施例提供一种液晶像素单元的驱动 方法。
如图 4所示， 本实施例的液晶像素单元具有与上述本实施例 2的液晶像素单元类似的结构， 区别在于， 本实施例的液晶像素单 元中还包括第二共享电容 CS2, 该第二共享电容 CS2能在共享导 通信号到来时与低压像素电极 11 导通， 并改变高压像素电极 12 的电压。
优选的， 该第二共享电容 CS2—端连接高压像素电极 12, 另 一端连接第一共享电容 CS1远离公共电极线 Com的一端（即连接 共享薄膜晶体管 TS的一端）。
如图 5所示， 本实施例的液晶像素单元的驱动方法中提供信 号的过程与上述实施例 2 相同， 只是由于增加了第二共享电容 CS2, 故其电压改变过程不同。
具体的，在一个显示周期结束时，高压像素电极 12带高电压， 低压像素电极 11带低电压，且各像素电极 11、12和共享电容 CS1、 CS2的电压极性相同（如均低于公共电极电压)； 当充电导通信号到 来后， 两个像素电极 11、 12 均达到数据信号电压 (极性与上个周 期相反， 如均高于公共电极电压）， 而第一共享电容 CS1中的电压 极性不变， 第二共享电容 CS2中的电压则极性改变， 此时， 两共 享电容 CS1、 CS2是串联在公共电极电压和数据信号电压间的， 其上的电压分配由二者的容量比决定； 当共享导通信号到来时， 第一共享电容 CS1 与低压像素电极 11 导通（同时第二共享电容 CS2也与低压像素电极 11导通）， 从而第一共享电容 CS1将低压 像素电极 11 的电压拉低， 而第二共享电容 CS2将高压像素电极 12的电压升高， 实现两像素电极 11、 12的电压不同。
根据本实施例的方式， 通过设置第二共享电容 CS2, 在一个 显示周期中， 不仅低压像素电极 11的电压会被拉低， 且高压像素 电极 12的电压还会被升高， 也就是说， 两个像素电极 11、 12均 分别在两个不同电压保持一定时间， 故其提高畴数的效果更明显 (因为高压像素电极 12的畴数也加倍了）， 能更有效的改善显示效 果。 当然， 以上各实施例所述的只是液晶像素单元驱动方法的部 分例子， 其中的液晶像素单元也可为其他的不同结构； 例如其中 还可包括第三像素电极 (如中压像素电极)，或其中还可包括更多的 共享电容等； 但只要液晶像素单元中包括至少两个像素电极， 且 各像素电极能在共享导通信号的作用下通过电荷共享方式实现不 同电压， 同时该充电导通信号和共享导通信号间的时间间隔大于 等于 1/10显示周期且小于等于 3/4显示周期， 其即属于本发明的 保护范围。 实施例 4:
本实施例提供一种液晶像素单元驱动装置，其中， 所述液晶 像素单元包括第一像素电极、 第二像素电极、 第一共享电容； 所 述液晶像素单元驱动装置包括：
数据驱动模块， 用于向液晶像素单元提供数据信号； 充电驱动模块， 用于向液晶像素单元提供充电导通信号，使 数据信号将第一像素电极和第二像素电极充电至相等电压； 共享驱动模块， 用于向液晶像素单元提供共享导通信号，使 第一共享电容与第一像素电极导通并改变第一像素电极的电压； 时间控制模块，用于控制共享驱动模块在充电导通信号结束 后间隔第一时间向液晶像素单元提供共享导通信号， 其中， 所述 第一时间大于等于 1/10显示周期且小于等于 3/4显示周期。
由于本实施例的液晶像素单元驱动装置中具有时间控制模 块， 故其采用的是上述的液晶像素单元驱动方法， 因此其畴数更 多、 可弥补电容误差， 显示效果更好。
其中， 以上各模块可以是独立的元件， 但也可结合为一体， 例如数据驱动模块可为数据驱动芯片（Data Driver IC), 而充电驱 动模块、 共享驱动模块、 时间控制模块可集成为栅极驱动芯片
(Gate Driver IC)。
同时，应当理解， 虽然本实施例的液晶像素单元驱动装置是 以对一个液晶像素单元进行驱动作为例子，但实际上， 其可同时 驱动多个液晶像素单元； 例如，每个液晶像素单元驱动装置可包 括多个数据驱动芯片和多个栅极驱动芯片，而每个驱动芯片又可 连接多条引线。
优选的， 所述液晶像素单元为 VA模式的液晶像素单元。 优选的， 所述液晶像素单元还包括： 第二共享电容， 在共享 导通信号到来时所述第二共享电容能与第一像素电极导通，并改 变第二像素电极的电压。
优选的，在相邻的两个显示周期中， 所述数据驱动模块向液 晶像素单元提供的数据信号均进行极性反转。 可以理解的是， 以上实施方式仅仅是为了说明本发明的原理 而采用的示例性实施方式， 然而本发明并不局限于此。 对于本领 域内的普通技术人员而言， 在不脱离本发明的精神和实质的情况 下， 可以做出各种变型和改进， 这些变型和改进也视为本发明的 保护范围。

Claims

权 利 要 求 书
1. 一种液晶像素单元驱动装置， 其中， 所述液晶像素单元包 括第一像素电极、 第二像素电极、 第一共享电容； 其特征在于， 所述液晶像素单元驱动装置包括：
数据驱动模块， 用于向液晶像素单元提供数据信号； 充电驱动模块， 用于向液晶像素单元提供充电导通信号， 使 数据信号将第一像素电极和第二像素电极充电至相等电压；
共享驱动模块， 用于向液晶像素单元提供共享导通信号， 所 述共享导通信号使第一共享电容与第一像素电极导通并改变第一 像素电极的电压；
时间控制模块， 用于控制共享驱动模块在充电导通信号结束 后间隔第一时间向液晶像素单元提供共享导通信号， 其中， 所述 第一时间大于等于 1/10显示周期且小于等于 3/4显示周期。
2. 根据权利要求 1所述的液晶像素单元驱动装置， 其特征在 于，
所述液晶像素单元为 VA模式的液晶像素单元。
3. 根据权利要求 1所述的液晶像素单元驱动装置， 其特征在 于，
所述第一像素电极连接第一充电薄膜晶体管的漏极， 所述第 二像素电极连接第二充电薄膜晶体管的漏极；
所述第一充电薄膜晶体管和第二充电薄膜晶体管的源极连接 同一条数据线， 栅极连接同一条充电栅极线， 所述数据线用于提 供数据信号， 所述充电栅极线用于提供充电导通信号。
4. 根据权利要求 1所述的液晶像素单元驱动装置， 其特征在 于，
所述第一像素电极通过共享薄膜晶体管连接第一共享电容一 端， 第一共享电容另一端连接公共电极线， 所述共享薄膜晶体管 的栅极连接共享栅极线， 所述共享栅极线用于提供共享导通信号。
5. 根据权利要求 1所述的液晶像素单元驱动装置， 其特征在 于， 所述液晶像素单元还包括：
第二共享电容， 所述共享导通信号使所述第二共享电容与第 一像素电极导通， 并改变第二像素电极的电压。
6. 根据权利要求 5所述的液晶像素单元驱动装置， 其特征在 于，
所述第一像素电极通过共享薄膜晶体管连接第一共享电容一 端， 第一共享电容另一端连接公共电极线， 所述共享薄膜晶体管 的栅极连接共享栅极线， 所述共享栅极线用于提供共享导通信号； 所述第二共享电容一端连接第二像素电极， 另一端连接第一 共享电容远离公共电极线的一端。
7. 根据权利要求 1所述的液晶像素单元驱动装置， 其特征在 于，
每个像素电极对应至少两个取向畴。
8. 根据权利要求 1所述的液晶像素单元驱动装置， 其特征在 于，
所述时间控制模块将所述第一时间控制为大于等于 1/10显示 周期且小于等于 1/4显示周期。
9. 根据权利要求 1所述的液晶像素单元驱动装置， 其特征在 于，
所述时间控制模块将所述第一时间控制为大于等于 1/4显示 周期且小于等于 3/4显示周期。
10. —种液晶像素单元驱动方法， 所述液晶像素单元包括第 一像素电极、 第二像素电极、 第一共享电容； 其特征在于，
所述液晶像素单元驱动方法包括：
提供充电导通信号， 使数据信号将第一像素电极和第二像素 电极充电至相等电压；
充电导通信号结束后， 间隔第一时间提供共享导通信号， 所 述共享导通信号使第一共享电容与第一像素电极导通并改变第一 像素电极的电压；
其中， 所述第一时间大于等于 1/10显示周期且小于等于 3/4 显示周期。
11. 根据权利要求 10所述的液晶像素单元驱动方法， 其特征 在于， 所述液晶像素单元还包括第二共享电容， 并且提供所述共 享导通信号的步骤使所述第二共享电容与第一像素电极导通， 并 改变第二像素电极的电压。
12. 根据权利要求 10所述的液晶像素单元驱动方法， 其特征 在于，
所述第一时间大于等于 1/10显示周期且小于等于 1/4显示周 期。
13. 根据权利要求 10所述的液晶像素单元驱动方法， 其特征 在于，
所述第一时间大于等于 1/4显示周期且小于等于 3/4显示周 期。
14. 根据权利要求 10所述的液晶像素单元驱动方法， 其特征 在于，
所述液晶像素单元在相邻的两个显示周期中均进行极性反 转。
15. 根据权利要求 10所述的液晶像素单元驱动方法， 其用于 驱动 VA模式的液晶像素单元。
16. 一种液晶显示装置， 其包括根据权利要求 1 所述的液晶 像素单元驱动装置。
PCT/CN2013/088439 2013-07-05 2013-12-03 液晶像素单元驱动方法、驱动装置及液晶显示装置 Ceased WO2015000258A1 (zh)

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