WO2018000592A1 - 液晶显示器及其数据驱动器 - Google Patents

液晶显示器及其数据驱动器 Download PDF

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Publication number
WO2018000592A1
WO2018000592A1 PCT/CN2016/099509 CN2016099509W WO2018000592A1 WO 2018000592 A1 WO2018000592 A1 WO 2018000592A1 CN 2016099509 W CN2016099509 W CN 2016099509W WO 2018000592 A1 WO2018000592 A1 WO 2018000592A1
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Prior art keywords
pixel
sub
pixels
gray scale
gamma voltages
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PCT/CN2016/099509
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English (en)
French (fr)
Inventor
扶伟
吴宇
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深圳市华星光电技术有限公司
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Priority to US15/304,518 priority Critical patent/US10311821B2/en
Publication of WO2018000592A1 publication Critical patent/WO2018000592A1/zh

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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
    • G09G3/3685—Details of drivers for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • 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
    • 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
    • G09G2300/0434—Flat panel display in which a field is applied parallel to the display plane
    • 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
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • 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
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • G09G2320/0219—Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
    • 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
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

Definitions

  • the invention belongs to the technical field of liquid crystal display, and in particular to a liquid crystal display and a data driver thereof.
  • LCDs liquid crystal displays
  • an LCD using a VA (Vertical Alignment) display mode has a problem of large-view character drift.
  • the LCD of the VA display mode is designed with a low color shift (LCS), but the LCD transmittance is lowered.
  • the monochrome LCS design is further performed for the LCD, that is, for the R sub-pixel, the G sub-pixel, and the B sub-pixel in the LCD, only one color sub-pixel is LCS-designed.
  • the LC of the LCS design for only one color sub-pixel has a higher transmittance than the LCD for the LCS design of the three color sub-pixels, and also has an LCS effect.
  • Such LCDs may exhibit color shift under low gray levels.
  • the design of the B sub-pixel is different from the design of the R sub-pixel and the G sub-pixel, and the capacitive coupling effect is also different.
  • the B sub-pixels may be brighter or darker, thereby causing a problem of color shift when the LCD performs display.
  • an object of the present invention is to provide a data driver for a liquid crystal display, comprising: a digital to analog conversion module; the digital to analog conversion module receiving a pixel for generating pixels from a timing controller of the liquid crystal display Gray scale reference voltage data, and converting the data generating the pixel gray scale reference voltage into a pixel gray scale reference voltage; the digital to analog conversion module from the liquid crystal display
  • the horse circuit receives two sets of gamma voltages, and generates pixel gray scale voltages of the data lines supplied to the liquid crystal display according to the pixel gray scale reference voltage and the two sets of gamma voltages; wherein the voltage values of the two sets of gamma voltages can be independent Adjustment.
  • the liquid crystal display comprises: m rows ⁇ n columns of color sub-pixels arranged in an array; the color sub-pixels are red sub-pixels or green sub-pixels or blue sub-pixels, in the row direction, red sub-pixels, green The sub-pixels and the blue sub-pixels are sequentially arranged in a row, and are all the same color sub-pixels in the column direction, and any two of the red sub-pixels, the green sub-pixels, and the blue sub-pixels
  • the pixel is a four-domain sub-pixel, and the remaining one color sub-pixel of the red sub-pixel, the green sub-pixel, and the blue sub-pixel is an eight-domain sub-pixel; n data lines extending in a column direction; each column The color sub-pixels are all connected to a corresponding one of the data lines; wherein the data lines connecting the four-domain sub-pixels receive the gray-scale voltage of the pixels generated by the digital-to-analog conversion module according to the pixel gray-scale reference voltage and
  • the liquid crystal display comprises: m rows ⁇ n columns of color sub-pixels arranged in an array; the color sub-pixels are red sub-pixels or green sub-pixels or blue sub-pixels, in the row direction, red sub-pixels, green The sub-pixels and the blue sub-pixels are sequentially arranged in a row, and are all the same color sub-pixels in the column direction, and any two of the red sub-pixels, the green sub-pixels, and the blue sub-pixels
  • the pixel is a four-domain sub-pixel, and the remaining one color sub-pixel of the red sub-pixel, the green sub-pixel, and the blue sub-pixel is an eight-domain sub-pixel; n data lines extending in a column direction; each column The color sub-pixels are interleaved to the corresponding two data lines adjacent to each other; wherein only the data lines connecting the four-domain sub-pixels are the first type of data lines, and the data lines of the four-domain sub-pixels and the eight-domain sub
  • the second type of data line supplies the pixel gray scale voltage to the four domain sub-pixels connected thereto
  • the second type of data line is received by the digital-to-analog conversion module according to the pixel gray scale reference voltage and the first group of gamma voltages a pixel gray scale voltage generated
  • the second type of data line supplies a pixel gray scale voltage to the eight-domain sub-pixel to which it is connected
  • the second type of data line is received by the digital-to-analog conversion module according to the pixel gray scale reference voltage and the second The gray scale voltage of the pixel generated by the group gamma voltage.
  • the data driver further includes: a switching signal generating module, configured to generate a first group of gamma voltages when the second type of data lines provide pixel gray scale voltages to the four domain sub-pixels or eight-domain sub-pixels to which they are connected a switching signal that switches between a second set of gamma voltages; wherein the switching signal generating module generates a second set of gamma voltage directions when the second type of data lines provide pixel gray scale voltages to the four domain sub-pixels to which they are connected a first set of gamma voltages for switching switching signals, the digital to analog conversion module receiving a first set of gamma voltages, and generating pixel grayscale voltages according to a pixel grayscale reference voltage and a first set of gamma voltages; When the data line supplies the pixel gray scale voltage to the eight-domain sub-pixel to which it is connected, the switching signal generation module generates a switching signal for switching the first group of gamma voltages to the second group of gamm
  • Another object of the present invention is to provide a liquid crystal display comprising: n data lines extending in a column direction; m rows x n columns of color sub-pixels arranged in an array; each color sub-pixel is connected to a corresponding one a data driver; the data driver comprising a digital to analog conversion module, the digital to analog conversion module receiving data for generating a pixel gray scale reference voltage from a timing controller of the liquid crystal display, and generating the data of the pixel gray scale reference voltage Converting into a pixel gray scale reference voltage; the digital to analog conversion module receives two sets of gamma voltages from a gamma circuit of the liquid crystal display, and generates a data line provided to the liquid crystal display according to the pixel gray scale reference voltage and the two sets of gamma voltages Pixel gray scale voltage; wherein the voltage values of the two sets of gamma voltages can be independently adjusted.
  • the present invention can provide independent adjustment of gamma voltages that can be independently adjusted with each other, so that pixel gray scale voltages for providing four-domain sub-pixels and eight-domain sub-pixels can be independently adjusted, thereby solving the problem of LCD display Color shift problem.
  • FIG. 1 shows a block diagram of a liquid crystal display according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a color sub-pixel connected to a data line according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a color sub-pixel connected to a data line and a block diagram of a data driver according to another embodiment of the present invention.
  • FIG. 1 shows a block diagram of a liquid crystal display according to an embodiment of the present invention.
  • a liquid crystal display includes: a liquid crystal panel assembly 300; a gate driver 400 and a data driver 500, both of which are connected to the liquid crystal panel assembly 300; and a timing controller 600 for controlling the liquid crystal panel assembly 300, a gate driver 400 and a data driver 500; a gamma circuit 200 for generating two sets of gamma voltages for supply to the data driver 500.
  • the voltage values of the two sets of gamma voltages can be independently adjusted.
  • the liquid crystal panel assembly 300 includes a plurality of display signal lines and m rows ⁇ n columns of color sub-pixels connected to the display signal lines and arranged in an array, that is, m ⁇ n color sub-pixels.
  • the liquid crystal panel assembly 300 may include a lower display panel (not shown) and an upper display panel (not shown) facing each other, and a liquid crystal layer (not shown) interposed between the lower display panel and the upper display panel.
  • the color sub-pixel may be a red sub-pixel R or a blue sub-pixel B or a green sub-pixel G, but the invention is not limited thereto.
  • a display signal line can be arranged on the lower display panel.
  • the display signal lines may include a plurality of gate lines transmitting gate signals G m to as G 1 in transmitting data signals and a plurality of data lines D 1 to D n.
  • Gate lines G 1 to G m extending in the row direction and substantially parallel to each other, and the data line D 1 to D n in the column direction and extending substantially parallel to each other.
  • Each color sub-pixel includes: a switching device connected to a corresponding gate line and a corresponding data line; and a liquid crystal capacitor connected to the switching device. If necessary, each color sub-pixel may also include a storage capacitor connected in parallel with the liquid crystal capacitor.
  • the switching device of each color sub-pixel is a three-terminal device, thus having a control terminal connected to the corresponding gate line, an input terminal connected to the corresponding data line, and an output terminal connected to the corresponding liquid crystal capacitor.
  • the gate driver 400 is connected to the gate lines G 1 to G m and applies a gate signal to the gate lines G 1 to G m , which is a gate-on voltage supplied from the external source to the gate driver 400 A combination of V0 and a gate-off voltage Voff.
  • a gate driver 400 is provided at one side of the liquid crystal panel assembly 300, a gate driver 400, and the gate lines G 1 to G m is connected to the gate driver 400.
  • the invention is not limited thereto. That is, a gate driver are disposed on opposite sides of the liquid crystal panel assembly 300, and the gate lines G 1 to G m are connected to each of the two gate drivers.
  • the data driver 500 is connected to the data lines D 1 to D n of the liquid crystal panel assembly 300 and applies a pixel gray scale voltage to the color sub-pixels.
  • the timing controller 600 controls the operations of the gate driver 400 and the data driver 500.
  • the timing controller 600 receives an input image signal and a plurality of input control signals for controlling display of the input image signal from an external graphics controller (not shown).
  • the timing controller 600 appropriately processes the input image signal in accordance with the input control signal, thereby generating data DAT that generates the pixel gray scale reference voltage in accordance with the operating conditions of the liquid crystal panel assembly 300.
  • the timing controller 600 generates a gate control signal and a data control signal, transmits the gate control signal to each of the gate drivers 400, and transmits the data control signal and the data DAT that generates the pixel gray scale reference voltage to the data driver 500.
  • the gate control signal CONT1 may include a scan start signal for starting an operation of the gate driver 400, that is, a scan operation, and at least one pixel clock signal for controlling when the gate-on voltage V0 is output.
  • the gate control signal CONT1 may also include an output enable signal for limiting the duration of the gate-on voltage V0.
  • the data control signal CONT2 may include a horizontal synchronization start signal indicating transmission of data DAT generating a pixel gray scale reference voltage, and a load signal requesting application of data DAT to the data lines D 1 to D n and generating a pixel gray scale reference voltage Corresponding pixel grayscale voltage; and data clock signal.
  • the data control signal CONT2 may also include an inversion signal for inverting the polarity of the pixel gray scale voltage with respect to the common voltage Vcom.
  • the data driver 500 includes a digital to analog conversion module 510.
  • the digital-to-analog conversion module 510 receives the data DAT that generates the pixel gray-scale reference voltage from the timing controller 600 in response to the data control signal CONT2, and converts the data DAT that generates the pixel gray-scale reference voltage into a pixel gray-scale reference voltage.
  • the data driver 500 receives two sets of gamma voltages from the gamma circuit 200 in response to the data control signal CONT2, and generates pixel gray scale voltages according to the pixel gray scale reference voltage and the two sets of gamma voltages. Then, the data driver 500 supplies the pixel gray scale voltages to the data lines D 1 to D n .
  • the arrangement of the liquid crystal molecules in the liquid crystal layer varies depending on the amplitude of the gray scale voltage of the pixel, and thus the polarity of the light transmitted through the liquid crystal layer can also be changed, resulting in a change in the transmittance of the liquid crystal layer.
  • connection structure of different color sub-pixels to data lines will be described below for how the data driver 500 according to an embodiment of the present invention provides pixel gray scale voltages to data lines.
  • FIG. 2 is a block diagram showing the connection of color sub-pixels to data lines in accordance with an embodiment of the present invention.
  • the liquid crystal panel assembly 300 includes m rows x n columns of color sub-pixels arranged in an array, that is, m x n color sub-pixels.
  • the color sub-pixel may be a red sub-pixel R or a blue sub-pixel B or a green sub-pixel G, but the invention is not limited thereto.
  • the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B are sequentially arranged in sequence; in the column direction, all of the same color sub-pixels, for example, may be red sub-pixels R or blue Sub-pixel B or green sub-pixel G.
  • any two color sub-pixels of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B are four-domain sub-pixels, and one color sub-pixel of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B It is an eight-domain sub-pixel.
  • the red sub-pixel R and the green sub-pixel G are four-domain sub-pixels
  • the blue sub-pixel B is an eight-domain sub-pixel.
  • the m rows ⁇ n columns of color sub-pixels and the data lines D 1 to D n are connected by a normal pixel architecture, that is, each column of the same color sub-pixel is connected to a corresponding one of the data lines D j , wherein, 1 ⁇ j ⁇ n.
  • the data lines D 1 , D 2 , D 4 , D 5 , ..., D n-2 , D n-1 connecting the four-domain sub-pixels (ie, the red sub-pixel R and the green sub-pixel G) are received by the digital-to-analog conversion module. 510 according to the pixel gray scale reference voltage and the pixel gray scale voltage generated by the first group of gamma voltages; and the data lines D 3 , D 6 , ..., D n connected to the eight domain sub-pixels (ie, the blue sub-pixel B) are received
  • the pixel gray scale voltage generated by the digital to analog conversion module 510 according to the pixel gray scale reference voltage and the second group of gamma voltages.
  • FIG. 3 is a schematic structural diagram of a color sub-pixel connected to a data line and a block diagram of a data driver according to another embodiment of the present invention.
  • the liquid crystal panel assembly 300 includes m rows x n columns of color sub-pixels arranged in an array. That is, m ⁇ n color sub-pixels.
  • the color sub-pixel may be a red sub-pixel R or a blue sub-pixel B or a green sub-pixel G, but the invention is not limited thereto.
  • the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B are sequentially arranged in sequence; in the column direction, all of the same color sub-pixels, for example, may be red sub-pixels R or blue Sub-pixel B or green sub-pixel G.
  • any two color sub-pixels of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B are four-domain sub-pixels, and one color sub-pixel of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B It is an eight-domain sub-pixel.
  • the red sub-pixel R and the green sub-pixel G are four-domain sub-pixels
  • the blue sub-pixel B is an eight-domain sub-pixel.
  • the data lines connecting only the four-domain sub-pixels are the data lines D 1 , D 4 , D 7 . . . , D n-2 , and the data lines D 1 , D 4 , D 7 ..., D n-2 receives the pixel gray scale voltage generated by the digital-to-analog conversion module 510 according to the pixel gray scale reference voltage and the first group of gamma voltages.
  • Data lines connecting four-domain sub-pixels and eight-domain sub-pixels simultaneously are data lines D 2 , D 3 , D 5 , D 6 , ..., D n-1 , D n , data lines D 2 , D 3 , D 5 , D 6 , ..., D n-1 , D n according to which pixel gray voltage is supplied to the four domains
  • the sub-pixel or eight-domain sub-pixel receives the pixel gray scale voltage generated by the digital-to-analog conversion module 510 according to the pixel gray scale reference voltage and the first group of gamma voltages or the second group of gamma voltages.
  • D n when the data lines D 2 , D 3 , D 5 , D 6 , . . . , D n-1 , D n provide pixel gray scale voltages to the four domain sub-pixels to which they are connected, the data lines D 2 , D 3 , D 5 , D 6 , ..., D n-1 , D n receive the pixel gray scale voltage generated by the digital-to-analog conversion module 510 according to the pixel gray scale reference voltage and the first group of gamma voltages; when the data line D 2 , When D 3 , D 5 , D 6 , ..., D n-1 , D n provide pixel gray scale voltages to the eight-domain sub-pixels to which they are connected, data lines D 2 , D 3 , D 5 , D 6 , ... D n-1 , D n receive the pixel gray scale voltage generated by the digital-to-analog conversion module 510 according to the pixel gray scale reference voltage and the second group of
  • the data driver 500 further includes: a switching signal generating module 520 for using the data lines D 2 , D 3 , D 5 , D 6 , ..., D n when -1, D n pixel gray scale voltage thereto to provide the four-domain sub-pixel or sub-pixel connected to the eight domains of generating a switching signal for switching between a first set and a second set of gamma voltages gamma voltage.
  • a switching signal generating module 520 for using the data lines D 2 , D 3 , D 5 , D 6 , ..., D n when -1, D n pixel gray scale voltage thereto to provide the four-domain sub-pixel or sub-pixel connected to the eight domains of generating a switching signal for switching between a first set and a second set of gamma voltages gamma voltage.
  • the data lines D 1, D 4, D 7 ??, D n-2 when the pixel gray scale reference voltage to provide odd-numbered lines or even-numbered rows color sub-pixel, the data lines D 1, D 4, D 7 . . . , D n ⁇ 2 receives the pixel gray scale voltage generated by the digital-to-analog conversion module 510 according to the pixel gray scale reference voltage and the first group of gamma voltages, and supplies the generated pixel gray scale voltage to the red sub-pixel R.
  • the switching signal generation module 520 When the pixel gray scale reference voltage is supplied to the odd line color sub-pixels, the switching signal generation module 520 generates the second group of gamma voltages to the first The switching signals of the group gamma voltages are switched, and the data lines D 2 , D 5 , D 8 , ..., D n-1 are received by the digital-to-analog conversion module 510 according to the pixel gray-scale reference voltage and the first group of gamma voltages.
  • the generated pixel gray scale voltage is supplied to the green sub-pixel G;
  • the switching signal generation module 520 generates the first group of gamma voltages to the second a switching signal in which the group gamma voltage is switched, and the data lines D 2 , D 5 , D 8 , ..., D n-1 are received by the digital-to-analog conversion module 510 according to the pixel gray-scale reference voltage and the second group of gamma voltages.
  • the pixel gray scale voltage is supplied to the blue sub-pixel B.
  • the switching signal generation module 520 For the data lines D 3 , D 6 , D 9 , . . . , D n , when the pixel gray scale reference voltage is supplied to the odd line color sub-pixels, the switching signal generation module 520 generates the first group of gamma voltages to the second group of gamma The switching signal of the horse voltage switching, the data lines D 3 , D 6 , D 9 , . . .
  • D n receive the pixel gray scale voltage generated by the digital-to-analog conversion module 510 according to the pixel gray scale reference voltage and the second group of gamma voltages And generating the generated pixel gray scale voltage to the blue sub-pixel B; when the pixel gray scale reference voltage is supplied to the even-line color sub-pixel, the switching signal generation module 520 generates the second group of gamma voltages to the first group of gamma The switching signal for switching the voltage, the data lines D 3 , D 6 , D 9 , . . .
  • D n receive the gray scale voltage of the pixel generated by the digital-to-analog conversion module 510 according to the pixel gray reference voltage and the first group of gamma voltages, The generated pixel gray scale voltage is supplied to the red sub-pixel R.
  • the pixel gray scale voltages of the four domain sub-pixels and the eight-domain sub-pixels can be independently adjusted, thereby solving the color shift appearing when the LCD performs display. problem.

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Abstract

公开了一种液晶显示器的数据驱动器，其包括：数模转换模块（510）；所述数模转换模块（510）从液晶显示器的时序控制器（600）接收用于产生像素灰阶参考电压的数据（DAT），并将所述产生像素灰阶参考电压的数据转（DAT）换成像素灰阶参考电压；所述数模转换模块（510）从液晶显示器的伽马电路（200）接收两组伽马电压，并根据像素灰阶参考电压与两组伽马电压产生提供给液晶显示器的数据线（D1-Dn）的像素灰阶电压；其中，两组伽马电压的电压值能够被分别独立调节。还公开了一种液晶显示器。通过设置两组彼此能够独立调节的伽马电压，使得提供个四畴子像素和八畴子像素的像素灰阶电压能够被独立调节，从而解决LCD进行显示时出现的色偏问题。

Description

液晶显示器及其数据驱动器 技术领域
本发明属于液晶显示技术领域，具体地讲，涉及一种液晶显示器及其数据驱动器。
背景技术
随着光电与半导体技术的演进，也带动了平板显示器(Flat Panel Display)的蓬勃发展，而在诸多平板显示器中，液晶显示器(Liquid Crystal Display，LCD)因具有高空间利用效率、低消耗功率、无辐射以及低电磁干扰等诸多优越特性，已被应用于生产生活的各个方面。
目前，采用VA(Vertical Alignment，垂直配向)显示模式的LCD具有大视角色漂的问题。为了解决这个问题，对VA显示模式的LCD进行低色偏(Low Color Shift，LCS)设计，但是会使LCD穿透率下降。为了解决穿透率下降的问题，进一步地针对LCD进行单色LCS设计，即针对LCD中的R子像素、G子像素、B子像素，只对其中一种颜色子像素进行LCS设计。这样，仅对一种颜色子像素进行LCS设计的LCD的穿透率就会比对三种颜色子像素都进行LCS设计的LCD的穿透率高，而且也具有LCS效果。
然而，这样的LCD在低灰阶下会出现色偏的现象。以仅对B子像素进行LCS设计的LCD为例，B子像素的设计与R子像素、G子像素的设计不同，进而电容耦合效应也会不一样。这样，在同样灰阶下，B子像素会偏亮或偏暗，从而使LCD进行显示时出现色偏的问题。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种液晶显示器的数据驱动器，其包括：数模转换模块；所述数模转换模块从液晶显示器的时序控制器接收用于产生像素灰阶参考电压的数据，并将所述产生像素灰阶参考电压的数据转换成像素灰阶参考电压；所述数模转换模块从液晶显示器的伽 马电路接收两组伽马电压，并根据像素灰阶参考电压与两组伽马电压产生提供给液晶显示器的数据线的像素灰阶电压；其中，两组伽马电压的电压值能够被分别独立调节。
进一步地，所述液晶显示器包括：阵列排布的m行×n列颜色子像素；所述颜色子像素为红色子像素或绿色子像素或蓝色子像素，在行方向上，红色子像素、绿色子像素、蓝色子像素依序重复排布，在列方向上，均为同一种颜色子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中任意两种颜色子像素为四畴子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中剩余一种颜色子像素为八畴子像素；沿列方向延伸的n条数据线；每列颜色子像素都连接到对应的一条数据线；其中，连接四畴子像素的数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压，连接八畴子像素的数据线接收由所述数模转换模块根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压。
进一步地，所述液晶显示器包括：阵列排布的m行×n列颜色子像素；所述颜色子像素为红色子像素或绿色子像素或蓝色子像素，在行方向上，红色子像素、绿色子像素、蓝色子像素依序重复排布，在列方向上，均为同一种颜色子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中任意两种颜色子像素为四畴子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中剩余一种颜色子像素为八畴子像素；沿列方向延伸的n条数据线；每列颜色子像素交错连接到对应的彼此相邻的两条数据线上；其中，仅连接四畴子像素的数据线为第一类数据线，同时连接四畴子像素和八畴子像素的数据线为第二类数据线；第一类数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压；第二类数据线根据其连接的颜色子像素为四畴子像素或八畴子像素接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压或第二组伽马电压产生的像素灰阶电压。
进一步地，当第二类数据线向其连接的四畴子像素提供像素灰阶电压时，第二类数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压；当第二类数据线向其连接的八畴子像素提供像素灰阶电压时，第二类数据线接收由所述数模转换模块根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压。
进一步地，所述数据驱动器还包括：切换信号产生模块，用于当第二类数据线向其连接的四畴子像素或八畴子像素提供像素灰阶电压时，产生第一组伽马电压与第二组伽马电压之间进行切换的切换信号；其中，当第二类数据线向其连接的四畴子像素提供像素灰阶电压时，切换信号产生模块产生第二组伽马电压向第一组伽马电压进行切换的切换信号，所述数模转换模块接收第一组伽马电压，并根据像素灰阶参考电压与第一组伽马电压产生像素灰阶电压；当第二类数据线向其连接的八畴子像素提供像素灰阶电压时，切换信号产生模块产生第一组伽马电压向第二组伽马电压进行切换的切换信号，所述数模转换模块接收第二组伽马电压，并根据像素灰阶参考电压与第二组伽马电压产生像素灰阶电压。
本发明的另一目的还在于提供一种液晶显示器，其包括：沿列方向延伸的n条数据线；阵列排布的m行×n列颜色子像素；每个颜色子像素连接到对应的一条数据线；数据驱动器，其包括数模转换模块，所述数模转换模块从液晶显示器的时序控制器接收用于产生像素灰阶参考电压的数据，并将所述产生像素灰阶参考电压的数据转换成像素灰阶参考电压；所述数模转换模块从液晶显示器的伽马电路接收两组伽马电压，并根据像素灰阶参考电压与两组伽马电压产生提供给液晶显示器的数据线的像素灰阶电压；其中，两组伽马电压的电压值能够被分别独立调节。
本发明的有益效果：本发明通过设置两组彼此能够独立调节的伽马电压，使得提供个四畴子像素和八畴子像素的像素灰阶电压能够被独立调节，从而解决LCD进行显示时出现的色偏问题。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1示出了根据本发明的实施例的液晶显示器的框图；
图2是根据本发明的实施例的颜色子像素与数据线连接的结构示意图；
图3是根据本发明的另一实施例的颜色子像素与数据线连接的结构示意图以及数据驱动器的模块图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
图1示出了根据本发明的实施例的液晶显示器的框图。
参照图1，根据本发明的实施例的液晶显示器包括：液晶面板组件300；栅极驱动器400和数据驱动器500，二者都连接到液晶面板组件300；时序控制器600，用于控制液晶面板组件300、栅极驱动器400和数据驱动器500；伽马电路200，用于产生两组伽马电压，以提供给数据驱动器500。其中，这两组伽马电压的电压值可以被分别独立调节。
液晶面板组件300包括多条显示信号线和连接到显示信号线并按阵列排列的m行×n列颜色子像素，即m×n个颜色子像素。液晶面板组件300可以包括：彼此面对的下显示面板(未示出)和上显示面板(未示出)，以及被插入在下显示面板和上显示面板之间的液晶层(未示出)。这里，颜色子像素可以为红色子像素R或者蓝色子像素B或者绿色子像素G，但本发明并不限制于此。
可以在下显示面板上布置显示信号线。显示信号线可以包括传送栅极信号的多条栅极线G1至Gm和传送数据信号的多条数据线D1至Dn。栅极线G1至Gm按行方向延伸并且彼此大致平行，并且数据线D1至Dn按列方向延伸并且彼此大致平行。
每个颜色子像素包括：开关器件，连接到相应的栅极线和相应的数据线；以及液晶电容器，连接到该开关器件。如果必要，每个颜色子像素也可以包括存储电容器，其与液晶电容器并联连接。
每个颜色子像素的开关器件是三端器件，因此具有连接到相应栅极线的控制端、连接到相应数据线的输入端和连接到相应液晶电容器的输出端。
栅极驱动器400连接到栅极线G1至Gm，并向栅极线G1至Gm施加栅极信 号，该栅极信号是由外部源提供给栅极驱动器400的栅极导通电压V0和栅极截止电压Voff的组合。参照图1，在液晶面板组件300的一侧设置一个栅极驱动器400，并且栅极线G1至Gm连接到栅极驱动器400。然而，本发明不限于此。也就是说，可以在液晶面板组件300的相对两侧分别布置一个栅极驱动器，并且栅极线G1至Gm都连接到这两个栅极驱动器的每一个。
数据驱动器500连接到液晶面板组件300的数据线D1至Dn，并向颜色子像素施加像素灰阶电压。时序控制器600控制栅极驱动器400和数据驱动器500的操作。
时序控制器600从外部图形控制器(未示出)接收输入图像信号以及用于控制输入图像信号的显示的多个输入控制信号。时序控制器600根据输入控制信号适当处理输入图像信号，从而产生符合液晶面板组件300的操作条件的产生像素灰阶参考电压的数据DAT。然后，时序控制器600产生栅极控制信号和数据控制信号，将栅极控制信号传送到各栅极驱动器400，并将数据控制信号和产生像素灰阶参考电压的数据DAT传送到数据驱动器500。
栅极控制信号CONT1可以包括：扫描开始信号，用于启动栅极驱动器400的操作、即扫描操作；以及至少一个像素时钟信号，用于控制何时输出栅极导通电压V0。栅极控制信号CONT1也可以包括输出使能信号，用于限制栅极导通电压V0的持续时间。
数据控制信号CONT2可以包括：水平同步开始信号，其指示产生像素灰阶参考电压的数据DAT的传输；加载信号，其请求向数据线D1至Dn施加与产生像素灰阶参考电压的数据DAT对应的像素灰阶电压；以及数据时钟信号。数据控制信号CONT2也可以包括反转信号，用于反转像素灰阶电压相对于公共电压Vcom的极性。
数据驱动器500包括：数模转换模块510。数模转换模块510响应于数据控制信号CONT2从时序控制器600接收产生像素灰阶参考电压的数据DAT，并将产生像素灰阶参考电压的数据DAT转换成像素灰阶参考电压。数据驱动器500响应于数据控制信号CONT2从伽马电路200接收两组伽马电压，并根据像素灰阶参考电压与两组伽马电压产生像素灰阶电压。然后，数据驱动器500将像素灰阶电压提供给数据线D1至Dn。
液晶层内的液晶分子的排列根据像素灰阶电压的幅度而变化，因而通过液晶层传送的光的极性也可以变化，从而导致液晶层的透射率的变化。
以下将针对不同的颜色子像素与数据线的连接结构对根据本发明的实施例的数据驱动器500如何向数据线提供像素灰阶电压进行描述说明。
图2是根据本发明的实施例的颜色子像素与数据线连接的结构示意图。
参照图2，液晶面板组件300包括按阵列排列的m行×n列颜色子像素，即m×n个颜色子像素。这里，颜色子像素可以为红色子像素R或者蓝色子像素B或者绿色子像素G，但本发明并不限制于此。
在行方向上，红色子像素R、绿色子像素G、蓝色子像素B依序重复排布；在列方向上，均为同一种颜色子像素，例如，可均为红色子像素R或者蓝色子像素B或者绿色子像素G。
红色子像素R、绿色子像素G、蓝色子像素B中任意两种颜色子像素为四畴子像素，红色子像素R、绿色子像素G、蓝色子像素B中剩余一种颜色子像素为八畴子像素。在本实施例中，红色子像素R和绿色子像素G为四畴子像素，蓝色子像素B为八畴子像素。
m行×n列颜色子像素与数据线D1至Dn采用常规像素(normal pixel)架构进行连接，即，每列相同的颜色子像素都连接到对应的一条数据线Dj，其中，1≤j≤n。
连接四畴子像素(即红色子像素R和绿色子像素G)的数据线D1、D2、D4、D5、……、Dn-2、Dn-1接收由数模转换模块510根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压；而连接八畴子像素(即蓝色子像素B)的数据线D3、D6、……、Dn接收由数模转换模块510根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压。
图3是根据本发明的另一实施例的颜色子像素与数据线连接的结构示意图以及数据驱动器的模块图。
参照图3，液晶面板组件300包括按阵列排列的m行×n列颜色子像素， 即m×n个颜色子像素。这里，颜色子像素可以为红色子像素R或者蓝色子像素B或者绿色子像素G，但本发明并不限制于此。
在行方向上，红色子像素R、绿色子像素G、蓝色子像素B依序重复排布；在列方向上，均为同一种颜色子像素，例如，可均为红色子像素R或者蓝色子像素B或者绿色子像素G。
红色子像素R、绿色子像素G、蓝色子像素B中任意两种颜色子像素为四畴子像素，红色子像素R、绿色子像素G、蓝色子像素B中剩余一种颜色子像素为八畴子像素。在本实施例中，红色子像素R和绿色子像素G为四畴子像素，蓝色子像素B为八畴子像素。
m行×n列颜色子像素与数据线D1至Dn采用交错像素(flip pixel)架构进行连接，即，每列相同的颜色子像素交错连接到对应的彼此相邻的两条数据线数据线Dj-1和Dj，其中，1≤j≤n。
仅连接四畴子像素(即仅连接红色子像素R和/或绿色子像素G)的数据线为数据线D1、D4、D7……、Dn-2，数据线D1、D4、D7……、Dn-2接收由数模转换模块510根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压。
同时连接四畴子像素和八畴子像素(即同时连接红色子像素R和蓝色子像素B、绿色子像素G和蓝色子像素B)的数据线为数据线D2、D3、D5、D6、……、Dn-1、Dn，数据线D2、D3、D5、D6、……、Dn-1、Dn根据其提供像素灰阶电压给四畴子像素或八畴子像素接收由数模转换模块510根据像素灰阶参考电压与第一组伽马电压或第二组伽马电压产生的像素灰阶电压。
具体地，当数据线D2、D3、D5、D6、……、Dn-1、Dn向其连接的四畴子像素提供像素灰阶电压时，数据线D2、D3、D5、D6、……、Dn-1、Dn接收由数模转换模块510根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压；当数据线D2、D3、D5、D6、……、Dn-1、Dn向其连接的八畴子像素提供像素灰阶电压时，数据线D2、D3、D5、D6、……、Dn-1、Dn接收由数模转换模块510根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压。
为了实现两组伽马电压之间的切换，参照图3，数据驱动器500还包括： 切换信号产生模块520，用于当数据线D2、D3、D5、D6、……、Dn-1、Dn向其连接的四畴子像素或八畴子像素提供像素灰阶电压时，产生第一组伽马电压与第二组伽马电压之间进行切换的切换信号。
参照图3，针对数据线D1、D4、D7……、Dn-2，当向奇数行或偶数行颜色子像素提供像素灰阶参考电压时，数据线D1、D4、D7……、Dn-2接收由数模转换模块510根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压，并将产生的像素灰阶电压提供给红色子像素R。
针对数据线D2、D5、D8、……、Dn-1，当向奇数行颜色子像素提供像素灰阶参考电压时，切换信号产生模块520产生第二组伽马电压向第一组伽马电压进行切换的切换信号，数据线D2、D5、D8、……、Dn-1接收由数模转换模块510根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压，并将产生的像素灰阶电压提供给绿色子像素G；当向偶数行颜色子像素提供像素灰阶参考电压时，切换信号产生模块520产生第一组伽马电压向第二组伽马电压进行切换的切换信号，数据线D2、D5、D8、……、Dn-1接收由数模转换模块510根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压，并将产生的像素灰阶电压提供给蓝色子像素B。
针对数据线D3、D6、D9、……、Dn，当向奇数行颜色子像素提供像素灰阶参考电压时，切换信号产生模块520产生第一组伽马电压向第二组伽马电压进行切换的切换信号，数据线D3、D6、D9、……、Dn接收由数模转换模块510根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压，并将产生的像素灰阶电压提供给蓝色子像素B；当向偶数行颜色子像素提供像素灰阶参考电压时，切换信号产生模块520产生第二组伽马电压向第一组伽马电压进行切换的切换信号，数据线D3、D6、D9、……、Dn接收由数模转换模块510根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压，并将产生的像素灰阶电压提供给红色子像素R。
综上所述，通过设置两组彼此能够独立调节的伽马电压，使得提供个四畴子像素和八畴子像素的像素灰阶电压能够被独立调节，从而解决LCD进行显示时出现的色偏问题。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将 理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (12)

  1. 一种液晶显示器的数据驱动器，其中，包括：数模转换模块；
    所述数模转换模块从液晶显示器的时序控制器接收用于产生像素灰阶参考电压的数据，并将所述产生像素灰阶参考电压的数据转换成像素灰阶参考电压；
    所述数模转换模块从液晶显示器的伽马电路接收两组伽马电压，并根据像素灰阶参考电压与两组伽马电压产生提供给液晶显示器的数据线的像素灰阶电压；其中，两组伽马电压的电压值能够被分别独立调节。
  2. 根据权利要求1所述的数据驱动器，其中，所述液晶显示器包括：
    阵列排布的m行×n列颜色子像素；所述颜色子像素为红色子像素或绿色子像素或蓝色子像素，在行方向上，红色子像素、绿色子像素、蓝色子像素依序重复排布，在列方向上，均为同一种颜色子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中任意两种颜色子像素为四畴子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中剩余一种颜色子像素为八畴子像素；
    沿列方向延伸的n条数据线；每列颜色子像素都连接到对应的一条数据线；
    其中，连接四畴子像素的数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压，连接八畴子像素的数据线接收由所述数模转换模块根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压。
  3. 根据权利要求1所述的数据驱动器，其中，所述液晶显示器包括：
    阵列排布的m行×n列颜色子像素；所述颜色子像素为红色子像素或绿色子像素或蓝色子像素，在行方向上，红色子像素、绿色子像素、蓝色子像素依序重复排布，在列方向上，均为同一种颜色子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中任意两种颜色子像素为四畴子像素，所述红色子 像素、所述绿色子像素及所述蓝色子像素中剩余一种颜色子像素为八畴子像素；
    沿列方向延伸的n条数据线；每列颜色子像素交错连接到对应的彼此相邻的两条数据线上；其中，仅连接四畴子像素的数据线为第一类数据线，同时连接四畴子像素和八畴子像素的数据线为第二类数据线；
    第一类数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压；
    第二类数据线根据其连接的颜色子像素为四畴子像素或八畴子像素接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压或第二组伽马电压产生的像素灰阶电压。
  4. 根据权利要求3所述的数据驱动器，其中，当第二类数据线向其连接的四畴子像素提供像素灰阶电压时，第二类数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压；
    当第二类数据线向其连接的八畴子像素提供像素灰阶电压时，第二类数据线接收由所述数模转换模块根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压。
  5. 根据权利要求3所述的数据驱动器，其中，所述数据驱动器还包括：
    切换信号产生模块，用于当第二类数据线向其连接的四畴子像素或八畴子像素提供像素灰阶电压时，产生第一组伽马电压与第二组伽马电压之间进行切换的切换信号；
    其中，当第二类数据线向其连接的四畴子像素提供像素灰阶电压时，切换信号产生模块产生第二组伽马电压向第一组伽马电压进行切换的切换信号，所述数模转换模块接收第一组伽马电压，并根据像素灰阶参考电压与第一组伽马电压产生像素灰阶电压；当第二类数据线向其连接的八畴子像素提供像素灰阶电压时，切换信号产生模块产生第一组伽马电压向第二组伽马电压进行切换的切换信号，所述数模转换模块接收第二组伽马电压，并根据像素灰阶参考电压与第二组伽马电压产生像素灰阶电压。
  6. 根据权利要求4所述的数据驱动器，其中，所述数据驱动器还包括：
    切换信号产生模块，用于当第二类数据线向其连接的四畴子像素或八畴子像素提供像素灰阶电压时，产生第一组伽马电压与第二组伽马电压之间进行切换的切换信号；
    其中，当第二类数据线向其连接的四畴子像素提供像素灰阶电压时，切换信号产生模块产生第二组伽马电压向第一组伽马电压进行切换的切换信号，所述数模转换模块接收第一组伽马电压，并根据像素灰阶参考电压与第一组伽马电压产生像素灰阶电压；当第二类数据线向其连接的八畴子像素提供像素灰阶电压时，切换信号产生模块产生第一组伽马电压向第二组伽马电压进行切换的切换信号，所述数模转换模块接收第二组伽马电压，并根据像素灰阶参考电压与第二组伽马电压产生像素灰阶电压。
  7. 一种液晶显示器，其中，包括：
    沿列方向延伸的n条数据线；
    阵列排布的m行×n列颜色子像素；每个颜色子像素连接到对应的一条数据线；
    数据驱动器，其包括数模转换模块，所述数模转换模块从液晶显示器的时序控制器接收用于产生像素灰阶参考电压的数据，并将所述产生像素灰阶参考电压的数据转换成像素灰阶参考电压；所述数模转换模块从液晶显示器的伽马电路接收两组伽马电压，并根据像素灰阶参考电压与两组伽马电压产生提供给液晶显示器的数据线的像素灰阶电压；其中，两组伽马电压的电压值能够被分别独立调节。
  8. 根据权利要求7所述的液晶显示器，其中，
    所述颜色子像素为红色子像素或绿色子像素或蓝色子像素；所述红色子像素、所述绿色子像素及所述蓝色子像素中任意两种颜色子像素为四畴子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中剩余一种颜色子像素为八畴子像素；
    在行方向上，红色子像素、绿色子像素、蓝色子像素依序重复排布；在列方向上，均为同一种颜色子像素；每列颜色子像素都连接到对应的一条数据线；
    其中，连接四畴子像素的数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压，连接八畴子像素的数据线接收由所述数模转换模块根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压。
  9. 根据权利要求7所述的液晶显示器，其中，
    所述颜色子像素为红色子像素或绿色子像素或蓝色子像素；所述红色子像素、所述绿色子像素及所述蓝色子像素中任意两种颜色子像素为四畴子像素，所述红色子像素、所述绿色子像素及所述蓝色子像素中剩余一种颜色子像素为八畴子像素；
    在行方向上，红色子像素、绿色子像素、蓝色子像素依序重复排布；在列方向上，均为同一种颜色子像素，每列颜色子像素交错连接到对应的彼此相邻的两条数据线上；其中，仅连接四畴子像素的数据线为第一类数据线，同时连接四畴子像素和八畴子像素的数据线为第二类数据线；
    第一类数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压；
    第二类数据线根据其连接的颜色子像素为四畴子像素或八畴子像素接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压或第二组伽马电压产生的像素灰阶电压。
  10. 根据权利要求8所述的液晶显示器，其中，当第二类数据线向其连接的四畴子像素提供像素灰阶电压时，第二类数据线接收由所述数模转换模块根据像素灰阶参考电压与第一组伽马电压产生的像素灰阶电压；
    当第二类数据线向其连接的八畴子像素提供像素灰阶电压时，第二类数据线接收由所述数模转换模块根据像素灰阶参考电压与第二组伽马电压产生的像素灰阶电压。
  11. 根据权利要求9所述的液晶显示器，其中，所述数据驱动器还包括：切换信号产生模块，用于当第二类数据线向其连接的四畴子像素或八畴子像素提供像素灰阶电压时，产生第一组伽马电压与第二组伽马电压之间进行切换的切换信号；
    其中，当第二类数据线向其连接的四畴子像素提供像素灰阶电压时，切换信号产生模块产生第二组伽马电压向第一组伽马电压进行切换的切换信号，所述数模转换模块接收第一组伽马电压，并根据像素灰阶参考电压与第一组伽马电压产生像素灰阶电压；当第二类数据线向其连接的八畴子像素提供像素灰阶电压时，切换信号产生模块产生第一组伽马电压向第二组伽马电压进行切换的切换信号，所述数模转换模块接收第二组伽马电压，并根据像素灰阶参考电压与第二组伽马电压产生像素灰阶电压。
  12. 根据权利要求10所述的液晶显示器，其中，所述数据驱动器还包括：切换信号产生模块，用于当第二类数据线向其连接的四畴子像素或八畴子像素提供像素灰阶电压时，产生第一组伽马电压与第二组伽马电压之间进行切换的切换信号；
    其中，当第二类数据线向其连接的四畴子像素提供像素灰阶电压时，切换信号产生模块产生第二组伽马电压向第一组伽马电压进行切换的切换信号，所述数模转换模块接收第一组伽马电压，并根据像素灰阶参考电压与第一组伽马电压产生像素灰阶电压；当第二类数据线向其连接的八畴子像素提供像素灰阶电压时，切换信号产生模块产生第一组伽马电压向第二组伽马电压进行切换的切换信号，所述数模转换模块接收第二组伽马电压，并根据像素灰阶参考电压与第二组伽马电压产生像素灰阶电压。
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