WO2017211007A1 - 液晶显示器以及改善液晶显示器的色偏的方法 - Google Patents

液晶显示器以及改善液晶显示器的色偏的方法 Download PDF

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Publication number
WO2017211007A1
WO2017211007A1 PCT/CN2016/095203 CN2016095203W WO2017211007A1 WO 2017211007 A1 WO2017211007 A1 WO 2017211007A1 CN 2016095203 W CN2016095203 W CN 2016095203W WO 2017211007 A1 WO2017211007 A1 WO 2017211007A1
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Prior art keywords
sub
pixel
liquid crystal
crystal display
voltage
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PCT/CN2016/095203
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English (en)
French (fr)
Inventor
邢振周
谭小平
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Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US15/304,487 priority Critical patent/US20180182318A1/en
Publication of WO2017211007A1 publication Critical patent/WO2017211007A1/zh
Anticipated expiration legal-status Critical
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    • 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
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan 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
    • G09G3/3611—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
    • 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
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
    • 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 field of liquid crystal displays, and more particularly to a liquid crystal display and a method for improving the color shift of a liquid crystal display.
  • Liquid crystal displays such as thin film transistor liquid crystal displays (TFT-LCDs) are popular because of their small size, light weight, low power consumption, and high display quality.
  • the driving principle of the liquid crystal display is to control the rotation angle of the liquid crystal molecules by changing the voltage of the electrodes applied to the both ends of the liquid crystal layer, thereby controlling the amount of light transmitted through the liquid crystal panel.
  • the thin film transistor liquid crystal display will have different gamma curves at right angles of view (ie, positive viewing angle) and oblique viewing angles, causing color shift when oblique viewing angles; color shifts will cause the screen to appear white, in order to improve the film
  • the optical quality of transistor liquid crystal displays so this phenomenon needs to be eliminated.
  • the existing method is to divide the sub-pixel into a first portion and a second portion having the same area, charge the two portions with an equal amount of voltage through one gate line, and then discharge the voltage of the second portion through another gate line.
  • a voltage difference is generated between the first portion and the second portion, that is, a high gray level and a low gray level are formed, and the two colors are combined to produce a medium gray level.
  • the above process makes the gamma curve at oblique viewing angle close to the gamma curve at the positive viewing angle, thereby improving the color shift phenomenon.
  • this prior art has an unsatisfactory effect of improving color shift.
  • due to the discharge process of the second portion a longer charge and discharge time is required.
  • the present invention proposes a liquid crystal display and a method capable of improving the color shift of the liquid crystal display caused by the oblique viewing angle.
  • An aspect of the present invention provides a method of improving color shift of a liquid crystal display caused by a oblique viewing angle, the method comprising: dividing a sub-pixel of a liquid crystal display panel pixel into a first portion and a second portion, the area of the first portion being larger than the first portion The area of the two portions; the gate drive signal application state by controlling the gate lines connected to the first and second portions of the sub-pixel, and by controlling the output voltage of the data lines connected to the first and second portions of the sub-pixel , such that the gray level of the first portion of the sub-pixel is higher than the gray level of the second portion of the sub-pixel; mixing the gray level of the first portion of the sub-pixel with the gray level of the second portion, so that The oblique viewing angle gamma curve of the liquid crystal display approaches the direct viewing angle gamma curve of the liquid crystal display, thereby improving the color shift of the liquid crystal display.
  • the gate lines connected to the first portion and the second portion of the sub-pixel are applied with a gate driving signal to the first portion and the second portion of the sub-pixel, and the first data line connected to the first portion of the sub-pixel is to be A voltage is applied to the first portion of the sub-pixel, and the second data line connected to the second portion of the sub-pixel applies a second voltage to the second portion of the sub-pixel, the first voltage being higher than the second voltage, thereby causing the sub-pixel
  • the gray level of the first part of the sub-pixel is higher than the gray level of the second part of the sub-pixel.
  • the source driver of the liquid crystal display generates the first voltage and the second voltage, and supplies the first voltage and the second voltage to the first data line and the second data line, respectively.
  • the first gate line connected to the first portion of the sub-pixel to apply a gate drive signal to the first portion of the sub-pixel for a first period of time such that the second gate line connected to the second portion of the sub-pixel Applying a gate driving signal to the second portion of the sub-pixel for a second period of time, the first period of time being greater than the second period of time, the data lines connected to the first portion and the second portion of the sub-pixel applying the same voltage to the sub-pixel
  • the first portion and the second portion thereby cause the gray level of the first portion of the sub-pixel to be higher than the gray level of the second portion of the sub-pixel.
  • a source driver of the liquid crystal display generates the same voltage and provides the same voltage to the data line.
  • the first gate line and the second gate line simultaneously apply a gate driving signal to the first portion and the second portion of the sub-pixel, respectively, and the second gate line stops applying the gate driving to the second portion of the sub-pixel
  • the point in time of the signal is before the point in time at which the first gate line stops applying the gate drive signal to the first portion of the sub-pixel.
  • a liquid crystal display including: a liquid crystal display panel for performing display; and a controller.
  • the controller is configured to: divide the sub-pixels of the liquid crystal display panel pixels into a first portion and a second portion, the area of the first portion being larger than the area of the second portion; controlling the gates connected to the first portion and the second portion of the sub-pixel by controlling a gate driving signal application state of the line, and controlling an output voltage of the data line connected to the first portion and the second portion of the sub-pixel such that a gray level of the first portion of the sub-pixel is higher than a gray level of the second portion of the sub-pixel Mixing the gray level of the first portion of the sub-pixel with the gray level of the second portion to make the oblique viewing angle gamma curve of the liquid crystal display Approaching the direct viewing angle gamma curve of the liquid crystal display, thereby improving the color shift of the liquid crystal display.
  • the controller causes a gate line connected to the first portion and the second portion of the sub-pixel to apply a gate driving signal to the first portion and the second portion of the sub-pixel such that the first data connected to the first portion of the sub-pixel
  • the line applies a first voltage to the first portion of the sub-pixel such that the second data line connected to the second portion of the sub-pixel applies a second voltage to the second portion of the sub-pixel, the first voltage being higher than the second voltage, This causes the gray level of the first portion of the sub-pixel to be higher than the gray level of the second portion of the sub-pixel.
  • the controller controls the gate driver of the liquid crystal display to generate a gate driving signal and controls the gate driver to provide a gate driving signal to the gate line.
  • the controller controls the source driver of the liquid crystal display to generate the first voltage and the second voltage, and controls the source driver to provide the first voltage and the second voltage to the first data line and the second data line, respectively.
  • the controller causes the first gate line connected to the first portion of the sub-pixel to apply a gate drive signal to the first portion of the sub-pixel for a first period of time such that the second gate connected to the second portion of the sub-pixel
  • the polar line applies a gate drive signal to the second portion of the sub-pixel for a second period of time, wherein the first period of time is greater than the second period of time
  • the controller causes the data line to be connected to the first portion and the second portion of the sub-pixel The same voltage is applied to the first portion and the second portion of the sub-pixel, thereby causing the gray level of the first portion of the sub-pixel to be higher than the gray level of the second portion of the sub-pixel.
  • the controller controls the source driver of the liquid crystal display to generate the same voltage and controls the source driver to provide the same voltage to the data line.
  • the controller causes the first gate line and the second gate line to simultaneously apply a gate driving signal to the first portion and the second portion of the sub-pixel, respectively, and causes the second gate line to stop toward the second of the sub-pixel
  • the point in time at which the gate drive signal is partially applied is before the point in time when the first gate line stops applying the gate drive signal to the first portion of the sub-pixel.
  • FIG. 1 is a schematic diagram showing a driving structure of a source driver of a liquid crystal display
  • FIG. 2 is a general flow chart showing a method of improving color shift of a liquid crystal display
  • FIG. 3 is a schematic view showing a method of improving color shift of a liquid crystal display according to a first embodiment of the present invention
  • FIG. 4 is a schematic view showing a method of improving color shift of a liquid crystal display according to a second embodiment of the present invention.
  • FIG. 1 shows a schematic diagram of a driving architecture of a source driver 100 of a liquid crystal display.
  • the source driver 100 includes a programmable gamma voltage output module 102, a line buffer 104, a level shifter 106, a D/A converter 108, and a buffer 110.
  • the RGB data is input to the line buffer 104 through the line buffer 104, which transmits the RGB data to the level shifter 106, and the level shifter 106 can shift the input RGB data, the D/A converter 108 Digital-to-analog conversion of the shifted RGB data.
  • the programmable gamma voltage output module 102 outputs gamma compensation voltages (Vr1-Vr5 and Vr6-Vr10) to gamma-compensate the RGB data, and the data after gamma compensation and digital-to-analog conversion is buffered. 110 is buffered, and then the corresponding voltage is output to the data line connected to the sub-pixel of the liquid crystal display to drive the sub-pixel for display.
  • Vr1-Vr5 and Vr6-Vr10 gamma compensation voltages
  • FIG. 2 shows a general flow chart of a method of improving color shift of a liquid crystal display.
  • step S201 the sub-pixels of the liquid crystal display panel pixels are divided (or divided) into a first portion (a first sub-pixel unit) and a second portion (a second sub-pixel unit), wherein the first The area of the portion is larger than the area of the second portion.
  • step S202 by controlling a gate driving signal application state of the gate lines connected to the first and second portions of the sub-pixel, and by controlling output voltages of the data lines connected to the first and second portions of the sub-pixel,
  • the first portion and the second portion of the sub-pixel have different energy (ie, gray scale), and the gray portion of the first portion of the sub-pixel is higher than the gray portion of the second portion of the sub-pixel, that is, the first portion of the sub-pixel
  • the gray scale is a high gray scale
  • the gray scale of the second part of the sub-pixel is a low gray scale.
  • step S203 the grayscale of the first portion of the sub-pixel and the grayscale of the second portion are mixed (ie, the high grayscale and the low grayscale are mixed to form a medium grayscale), so that the oblique viewing angle gamma curve of the liquid crystal display is approximated.
  • the direct viewing angle gamma curve of the liquid crystal display improves the color shift of the liquid crystal display.
  • FIG 3 is a schematic view showing a method of improving color shift of a liquid crystal display according to a first embodiment of the present invention.
  • the sub-pixel 301 is divided into a first sub-pixel unit 302 and a second sub-pixel unit 303, wherein the area of the first sub-pixel unit 302 is larger than the area of the second sub-pixel unit 303.
  • the first sub-pixel unit 301 includes a first transistor 307 whose gate is connected to the gate line 306, the source of the first transistor 307 is connected to the first data line 304, and the drain of the first transistor 307 is grounded.
  • the second sub-pixel unit 303 includes a second transistor 308 having a gate connected to the gate line 306, a source of the second transistor 308 connected to the second data line 305, and a drain of the second transistor 308 being grounded.
  • a gate drive signal may be applied to the gates of the first and second transistors 307 and 308 of the sub-pixels through gate lines 306 connected to the first and second sub-pixel units 302 and 302.
  • a first voltage may be applied to the source of the first transistor 307 through the first data line 304, the first voltage being generated by the source driver 100.
  • a second voltage may be applied to the source of the second transistor 308 through the second data line 305, the second voltage being generated by the source driver 100, and the second voltage being lower than the first voltage.
  • the energy stored in the first sub-pixel unit 302 is higher than the energy stored in the second sub-pixel unit 303, that is, the first sub- The gray scale of the pixel unit 302 is higher than the gray scale of the second sub-pixel unit 303.
  • a medium gray scale is formed, thereby correcting the gamma curve in the case of the oblique viewing angle, so that the overall gamma at the oblique viewing angle is obtained.
  • Gamma when the curve approximates a straight angle of view The Ma curve which in turn improves the color shift of the liquid crystal display.
  • FIG. 4 is a schematic view showing a method of improving color shift of a liquid crystal display according to a second embodiment of the present invention.
  • the sub-pixel 401 is divided into a first sub-pixel unit 402 and a second sub-pixel unit 403, wherein the area of the first sub-pixel unit 402 is larger than the area of the second sub-pixel unit 403.
  • the first sub-pixel unit 401 includes a first transistor 407 having a gate connected to the first gate line 404, a source of the first transistor 407 connected to the data line 406, and a drain of the first transistor 407 being grounded.
  • the second sub-pixel unit 403 includes a second transistor 408 having a gate connected to the second gate line 405, a source of the second transistor 408 connected to the data line 406, and a drain of the second transistor 408 being grounded.
  • a gate driving signal may be applied to the first transistor 407 of the sub-pixel through the first gate line 404 connected to the first sub-pixel unit 402, and may be connected to the second gate line 405 connected to the second sub-pixel unit 403
  • a gate drive signal is applied to the gate of the second transistor 408 of the sub-pixel.
  • the same voltage can be applied to the sources of the first transistor 407 and the second transistor 408 through the data line 406, which voltage is generated by the source driver 100.
  • the connection of the second gate line 405 is broken, and then the connection of the first gate line 404 is broken, so that the connection is made.
  • the duration of the gate drive signal to the first gate line 404 of the first sub-pixel unit 402 is greater than the duration of the gate drive signal of the second gate line 405 connected to the second sub-pixel unit 403.
  • the energy stored in the first sub-pixel unit 402 is higher than the energy stored in the second sub-pixel unit 403, that is, the gray level of the first sub-pixel unit 402 is higher than that of the second sub-pixel unit 403.
  • a medium gray scale is formed, thereby correcting the gamma curve in the case of the oblique viewing angle, so that the overall gamma at the oblique viewing angle is obtained.
  • the curve approximates the overall gamma curve at the positive viewing angle, which in turn improves the color shift of the liquid crystal display.
  • a liquid crystal display according to the present invention which includes a liquid crystal display panel for display (not shown), and a controller (not shown) will be described below.
  • the controller can be configured to: divide the sub-pixels of the liquid crystal display panel pixels into the first part and the first a second portion, the area of the first portion is larger than the area of the second portion; the gate driving signal application state is controlled by controlling the gate lines connected to the first portion and the second portion of the sub-pixel, and is controlled to be connected to the first portion of the sub-pixel and The output voltage of the second portion of the data line is such that the gray level of the first portion of the sub-pixel is higher than the gray level of the second portion of the sub-pixel; the gray level of the first portion of the sub-pixel is mixed with the gray level of the second portion to The oblique viewing angle gamma curve of the liquid crystal display is approximated to the direct viewing angle gamma curve of the liquid crystal display, thereby improving the color shift of the liquid crystal display.
  • the controller can control a gate driver (not shown) of the liquid crystal display to generate a gate driving signal and control the gate driver to supply a gate driving signal to the gate line.
  • the controller may control the source driver 100 of the liquid crystal display to generate the first voltage and the second voltage, and control the source driver 100 to supply the first voltage and the second voltage to the first data line and the second data line, respectively.
  • controller causes the gray level of the first portion of the sub-pixel to be higher than the gray level of the second portion of the sub-pixel is similar to the first embodiment and the second embodiment described above, and details are not described herein again.
  • the color shift phenomenon of the liquid crystal display can be effectively improved, thereby improving the optical quality of the liquid crystal display and facilitating high-quality image display.

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

Abstract

一种液晶显示器以及改善液晶显示器的色偏的方法包括：将液晶显示器面板像素的子像素分割为第一部分和第二部分，第一部分的面积大于第二部分的面积；通过控制连接到子像素的第一部分和第二部分的栅极线的栅极驱动信号施加状态，并通过控制连接到子像素的第一部分和第二部分的数据线的输出电压，使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶；将子像素的第一部分的灰阶和第二部分的灰阶混合，以使得液晶显示器的斜视角伽玛曲线逼近液晶显示器的直视角伽玛曲线，从而改善液晶显示器的色偏。

Description

液晶显示器以及改善液晶显示器的色偏的方法 技术领域
本发明属于液晶显示器领域，更具体地说，涉及一种液晶显示器以及改善液晶显示器的色偏的方法。
背景技术
液晶显示器(例如薄膜晶体管液晶显示器(TFT-LCD))因其体积小、重量轻、功耗低、显示质量高而深受欢迎。液晶显示器的驱动原理是通过改变施加在液晶层两端的电极的电压来控制液晶分子的转动角度，从而控制透过液晶面板的光量。薄膜晶体管液晶显示器在直视角(即，正视角)和斜视角时的伽玛(gamma)曲线会不同，斜视角时会引起色偏；色偏的产生会使屏幕看起来泛白，为了提高薄膜晶体管液晶显示器的光学品质，所以需要消除这一现象。
现有的方法是将子像素分为面积相等的第一部分和第二部分，通过一条栅极线对两部分充等量的电压，随后通过另外一条栅极线将第二部分的电压放掉一部分，从而第一部分与第二部分之间产生电压差，即，形成一个高灰阶和一个低灰阶，二者混色以后产生中灰阶。上述过程使得斜视角时的伽玛曲线可以逼近正视角时的伽玛曲线，从而改善色偏现象。但是这种现有技术改善色偏的效果并不理想。另外，由于第二部分的放电过程，从而需要更长的充放电时间。
发明内容
为了解决上述问题，本发明提出一种液晶显示器以及能够改善由斜视角导致的液晶显示器的色偏的方法。
本发明的一方面提供一种改善由斜视角导致的液晶显示器的色偏的方法，所述方法包括：将液晶显示器面板像素的子像素分割为第一部分和第二部分，第一部分的面积大于第二部分的面积；通过控制连接到子像素的第一部分和第二部分的栅极线的栅极驱动信号施加状态，并通过控制连接到子像素的第一部分和第二部分的数据线的输出电压，使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶；将子像素的第一部分的灰阶和第二部分的灰阶混合，以使 得液晶显示器的斜视角伽玛曲线逼近液晶显示器的直视角伽玛曲线，从而改善液晶显示器的色偏。
可选地，使得连接到子像素的第一部分和第二部分的栅极线向子像素的第一部分和第二部分施加栅极驱动信号，连接到子像素的第一部分的第一数据线将第一电压施加到子像素的第一部分，连接到子像素的第二部分的第二数据线将第二电压施加到子像素的第二部分，第一电压高于第二电压，由此使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶。
可选地，液晶显示器的源极驱动器产生第一电压和第二电压，并将第一电压和第二电压分别提供给第一数据线和第二数据线。
可选地，使得连接到子像素的第一部分的第一栅极线向子像素的第一部分施加栅极驱动信号持续第一时间段，使得连接到子像素的第二部分的第二栅极线向子像素的第二部分施加栅极驱动信号持续第二时间段，第一时间段大于第二时间段，连接到子像素的第一部分和第二部分的数据线将相同电压施加到子像素的第一部分和第二部分，由此使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶。
可选地，液晶显示器的源极驱动器产生所述相同电压，并将所述相同电压提供给数据线。
可选地，第一栅极线和第二栅极线同时分别向子像素的第一部分和第二部分施加栅极驱动信号，第二栅极线停止向子像素的第二部分施加栅极驱动信号的时间点在第一栅极线停止向子像素的第一部分施加栅极驱动信号的时间点之前。
本发明的另一方面提供一种液晶显示器，所述液晶显示器包括：液晶显示器面板，用于进行显示；以及控制器。控制器被配置为：将液晶显示器面板像素的子像素分割为第一部分和第二部分，第一部分的面积大于第二部分的面积；通过控制连接到子像素的第一部分和第二部分的栅极线的栅极驱动信号施加状态，并通过控制连接到子像素的第一部分和第二部分的数据线的输出电压，使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶；将子像素的第一部分的灰阶和第二部分的灰阶混合，以使得液晶显示器的斜视角伽玛曲线 逼近液晶显示器的直视角伽玛曲线，从而改善液晶显示器的色偏。
可选地，控制器使得连接到子像素的第一部分和第二部分的栅极线向子像素的第一部分和第二部分施加栅极驱动信号，使得连接到子像素的第一部分的第一数据线将第一电压施加到子像素的第一部分，使得连接到子像素的第二部分的第二数据线将第二电压施加到子像素的第二部分，第一电压高于第二电压，由此使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶。
可选地，控制器控制液晶显示器的栅极驱动器产生栅极驱动信号，并控制栅极驱动器将栅极驱动信号提供给栅极线。
可选地，控制器控制液晶显示器的源极驱动器产生第一电压和第二电压，并控制源极驱动器将第一电压和第二电压分别提供给第一数据线和第二数据线。
可选地，控制器使得连接到子像素的第一部分的第一栅极线向子像素的第一部分施加栅极驱动信号持续第一时间段，使得连接到子像素的第二部分的第二栅极线向子像素的第二部分施加栅极驱动信号持续第二时间段，其中，第一时间段大于第二时间段，并且控制器使得连接到子像素的第一部分和第二部分的数据线将相同电压施加到子像素的第一部分和第二部分，由此使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶。
可选地，控制器控制液晶显示器的源极驱动器产生所述相同电压，并控制源极驱动器将所述相同电压提供给数据线。
可选地，控制器使得第一栅极线和第二栅极线同时分别向子像素的第一部分和第二部分施加栅极驱动信号，并且使得第二栅极线停止向子像素的第二部分施加栅极驱动信号的时间点在第一栅极线停止向子像素的第一部分施加栅极驱动信号的时间点之前。
在下文中，将部分地详细阐述本发明。然而，本发明的其他特征和/或优点将通过描述而变得清楚，或者可以经过本发明的实施而得知。
附图说明
通过下面结合附图描述实施例，本发明的上述和/或其他目的和优点将变得 更加清楚，其中：
图1示液晶显示器的源极驱动器的驱动架构示意图；
图2示出改善液晶显示器的色偏的方法的总体流程图；
图3示出根据本发明的第一实施例的改善液晶显示器色偏的方法的示意图；
图4示出根据本发明的第二实施例的改善液晶显示器色偏的方法的示意图。
具体实施方式
在下文中，将结合附图详细描述本发明的实施例。在附图中，清楚而简明地示出了与发明构思有关的主要元件，可夸大层或区域的形状，并且可省略次要的元件以避免表述不清楚。在整个说明书附图中，相同的附图标记始终指示相同的元件。然而，本发明不局限于下述实施例。在各个实施例或相应的方法描述中涉及的特征、元件或结构，均可单独或组合应用于其他实施例。
图1示出液晶显示器的源极驱动器100的驱动架构示意图。
如图1所示，源极驱动器100包括可编程伽玛电压输出模块102、行缓冲器(line buffer)104、电平移位器(level shifter)106、D/A转换器108以及缓冲器110。RGB数据通过行缓冲器104输入到行缓冲器104，行缓冲器104将RGB数据发送到电平移位器106，电平移位器106可对输入的RGB数据进行移位，D/A转换器108对移位以后的RGB数据进行数模转换。在数模转换期间，可编程伽玛电压输出模块102输出伽玛补偿电压(Vr1-Vr5以及Vr6-Vr10)对RGB数据进行伽玛补偿，经过伽玛补偿以及数模转换之后的数据由缓冲器110进行缓冲，随后将相应的电压输出到连接至液晶显示器的子像素的数据线上，以驱动子像素进行显示。
图2示出改善液晶显示器的色偏的方法的总体流程图。
如图2所示，在步骤S201，将液晶显示器面板像素的子像素分割(或划分)为第一部分(第一子像素单元)和第二部分(第二子像素单元)，其中，第一 部分的面积大于第二部分的面积。在步骤S202，通过控制连接到子像素的第一部分和第二部分的栅极线的栅极驱动信号施加状态，并通过控制连接到子像素的第一部分和第二部分的数据线的输出电压，使得子像素的第一部分和第二部分所具有的能量(即灰阶)不同，子像素的第一部分的灰阶高于子像素的第二部分的灰阶，也就是说，子像素的第一部分的灰阶为高灰阶，子像素的第二部分的灰阶为低灰阶。在步骤S203，将子像素的第一部分的灰阶和第二部分的灰阶混合(即，将高灰阶和低灰阶混合形成中灰阶)，以使得液晶显示器的斜视角伽玛曲线逼近液晶显示器的直视角伽玛曲线，从而改善液晶显示器的色偏。
下面参照图3和图4描述根据本发明的具体实施例的改善液晶显示器色偏的方法。
图3示出根据本发明的第一实施例的改善液晶显示器色偏的方法的示意图。
如图3所示，将子像素301分割成第一子像素单元302和第二子像素单元303，其中，第一子像素单元302的面积大于第二子像素单元303的面积。第一子像素单元301包括第一晶体管307，第一晶体管307的栅极连接到栅极线306，第一晶体管307的源极连接到第一数据线304，第一晶体管307的漏极接地。第二子像素单元303包括第二晶体管308，第二晶体管308的栅极连接到栅极线306，第二晶体管308的源极连接到第二数据线305，第二晶体管308的漏极接地。
可通过连接到第一子像素单元302和第二子像素单元303的栅极线306向子像素的第一晶体管307和第二晶体管308的栅极施加栅极驱动信号。可通过第一数据线304向第一晶体管307的源极施加第一电压，第一电压由源极驱动器100产生。可通过第二数据线305向第二晶体管308的源极施加第二电压，第二电压由源极驱动器100产生，并且第二电压低于第一电压。
在栅极驱动信号不变的情况下，由于第一电压高于第二电压，所以第一子像素单元302内存储的能量高于第二子像素单元303内存储的能量，即，第一子像素单元302的灰阶高于第二子像素单元303的灰阶。第一子像素单元302的高灰阶与第二子像素单元303的低灰阶混合以后，形成了中灰阶，从而修正了斜视角情况下的伽玛曲线，使得斜视角时的整体伽玛曲线逼近直视角时的伽 玛曲线，进而改善了液晶显示器的色偏。
图4示出根据本发明的第二实施例的改善液晶显示器色偏的方法的示意图。
如图4所示，将子像素401分割成第一子像素单元402和第二子像素单元403，其中，第一子像素单元402的面积大于第二子像素单元403的面积。第一子像素单元401包括第一晶体管407，第一晶体管407的栅极连接到第一栅极线404，第一晶体管407的源极连接到数据线406，第一晶体管407的漏极接地。第二子像素单元403包括第二晶体管408，第二晶体管408的栅极连接到第二栅极线405，第二晶体管408的源极连接到数据线406，第二晶体管408的漏极接地。
可通过连接到第一子像素单元402的第一栅极线404向子像素的第一晶体管407施加栅极驱动信号，并且可通过连接到第二子像素单元403的第二栅极线405向子像素的第二晶体管408的栅极施加栅极驱动信号。可通过数据线406向第一晶体管407和第二晶体管408的源极施加相同的电压，所述电压由源极驱动器100产生。
在第一晶体管407和第二晶体管408的源极施加的电压不变的情况下，首先，断开第二栅极线405的连接，随后再断开第一栅极线404的连接，使得连接到第一子像素单元402的第一栅极线404的栅极驱动信号的持续时间段大于连接到第二子像素单元403的第二栅极线405的栅极驱动信号的持续时间段。
在这种情况下，第一子像素单元402内存储的能量高于第二子像素单元403内存储的能量，即，第一子像素单元402的灰阶高于第二子像素单元403的灰阶。第一子像素单元402的高灰阶与第二子像素单元403的低灰阶混合以后，形成了中灰阶，从而修正了斜视角情况下的伽玛曲线，使得斜视角时的整体伽玛曲线逼近正视角时的整体伽玛曲线，进而改善了液晶显示器的色偏。
下面描述根据本发明的液晶显示器，所述液晶显示器包括：液晶显示器面板，用于进行显示(未示出)；以及控制器(未示出)。
控制器可被配置为：将液晶显示器面板像素的子像素分割为第一部分和第 二部分，第一部分的面积大于第二部分的面积；通过控制连接到子像素的第一部分和第二部分的栅极线的栅极驱动信号施加状态，并通过控制连接到子像素的第一部分和第二部分的数据线的输出电压，使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶；将子像素的第一部分的灰阶和第二部分的灰阶混合，以使得液晶显示器的斜视角伽玛曲线逼近液晶显示器的直视角伽玛曲线，从而改善液晶显示器的色偏。
控制器可控制液晶显示器的栅极驱动器(未示出)产生栅极驱动信号，并控制栅极驱动器将栅极驱动信号提供给栅极线。
控制器可控制液晶显示器的源极驱动器100产生第一电压和第二电压，并控制源极驱动器100将第一电压和第二电压分别提供给第一数据线和第二数据线。
控制器使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶的具体方式与前面描述的第一实施例和第二实施例类似，这里不再赘述。
通过采用本发明，可有效地改善液晶显示器的色偏现象，从而提高液晶显示器的光学品质，有利于高品质图像显示。
虽然已经示出和描述了以上实施例，但本领域技术人员将理解，本发明的创造性构思不限于这些实施例。在不脱离本发明的精神和原则的情况下，可以对上述实施例进行各种修改和变化。

Claims (10)

  1. 一种改善由斜视角导致的液晶显示器的色偏的方法，包括：
    将液晶显示器面板像素的子像素分割为第一部分和第二部分，第一部分的面积大于第二部分的面积；
    通过控制连接到子像素的第一部分和第二部分的栅极线的栅极驱动信号施加状态，并通过控制连接到子像素的第一部分和第二部分的数据线的输出电压，使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶；
    将子像素的第一部分的灰阶和第二部分的灰阶混合，以使得液晶显示器的斜视角伽玛曲线逼近液晶显示器的直视角伽玛曲线，从而改善液晶显示器的色偏。
  2. 根据权利要求1所述的方法，其中，使得连接到子像素的第一部分和第二部分的栅极线向子像素的第一部分和第二部分施加栅极驱动信号，连接到子像素的第一部分的第一数据线将第一电压施加到子像素的第一部分，连接到子像素的第二部分的第二数据线将第二电压施加到子像素的第二部分，第一电压高于第二电压，由此使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶。
  3. 根据权利要求2所述的方法，其中，液晶显示器的源极驱动器产生第一电压和第二电压，并将第一电压和第二电压分别提供给第一数据线和第二数据线。
  4. 根据权利要求1所述的方法，其中，使得连接到子像素的第一部分的第一栅极线向子像素的第一部分施加栅极驱动信号持续第一时间段，使得连接到子像素的第二部分的第二栅极线向子像素的第二部分施加栅极驱动信号持续第二时间段，第一时间段大于第二时间段，连接到子像素的第一部分和第二部分的数据线将相同电压施加到子像素的第一部分和第二部分，由此使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶。
  5. 根据权利要求4所述的方法，其中，液晶显示器的源极驱动器产生所述相同电压，并将所述相同电压提供给数据线。
  6. 根据权利要求4所述的方法，其中，第一栅极线和第二栅极线同时分别向子像素的第一部分和第二部分施加栅极驱动信号，第二栅极线停止向子像素的第二部分施加栅极驱动信号的时间点在第一栅极线停止向子像素的第一部分施加栅极驱动信号的时间点之前。
  7. 一种液晶显示器，包括：
    液晶显示器面板，用于进行显示；
    控制器，被配置为：
    将液晶显示器面板像素的子像素分割为第一部分和第二部分，第一部分的面积大于第二部分的面积；
    通过控制连接到子像素的第一部分和第二部分的栅极线的栅极驱动信号施加状态，并通过控制连接到子像素的第一部分和第二部分的数据线的输出电压，使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶；
    将子像素的第一部分的灰阶和第二部分的灰阶混合，以使得液晶显示器的斜视角伽玛曲线逼近液晶显示器的直视角伽玛曲线，从而改善液晶显示器的色偏。
  8. 根据权利要求7所述的液晶显示器，其中，控制器使得连接到子像素的第一部分和第二部分的栅极线向子像素的第一部分和第二部分施加栅极驱动信号，使得连接到子像素的第一部分的第一数据线将第一电压施加到子像素的第一部分，使得连接到子像素的第二部分的第二数据线将第二电压施加到子像素的第二部分，第一电压高于第二电压，由此使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶。
  9. 根据权利要求7所述的液晶显示器，其中，控制器使得连接到子像素的第一部分的第一栅极线向子像素的第一部分施加栅极驱动信号持续第一时间段，使得连接到子像素的第二部分的第二栅极线向子像素的第二部分施加栅极驱动信号持续第二时间段，其中，第一时间段大于第二时间段，并且控制器使得连接到子像素的第一部分和第二部分的数据线将相同电压施加到子像素的第一部分和第二部分，由此使得子像素的第一部分的灰阶高于子像素的第二部分的灰阶。
  10. 根据权利要求9所述的液晶显示器，其中，控制器使得第一栅极线和 第二栅极线同时分别向子像素的第一部分和第二部分施加栅极驱动信号，并且使得第二栅极线停止向子像素的第二部分施加栅极驱动信号的时间点在第一栅极线停止向子像素的第一部分施加栅极驱动信号的时间点之前。
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