WO2019033638A1 - 显示装置的白平衡调整方法和显示装置 - Google Patents

显示装置的白平衡调整方法和显示装置 Download PDF

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Publication number
WO2019033638A1
WO2019033638A1 PCT/CN2017/115903 CN2017115903W WO2019033638A1 WO 2019033638 A1 WO2019033638 A1 WO 2019033638A1 CN 2017115903 W CN2017115903 W CN 2017115903W WO 2019033638 A1 WO2019033638 A1 WO 2019033638A1
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Prior art keywords
white
chromaticity
gray scale
value
pixel
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English (en)
French (fr)
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李嘉航
施景仁
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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Priority to US16/639,488 priority Critical patent/US11050986B2/en
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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
    • 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
    • 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
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • 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
    • 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
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation

Definitions

  • the present application relates to the field of display technologies, and in particular, to a white balance adjustment method and a display device for a display device.
  • liquid crystal displays have become mainstream products of displays due to their thin body, low power consumption and low radiation.
  • Various displays are widely used in all aspects of life.
  • the white balance characteristic of the display is an important indicator of the color of the display. Generally speaking, the liquid crystal display must be adjusted by white balance to maintain the white color of each gray level constant, otherwise the color performance of the display will be A distortion occurs.
  • the white chromaticity of the display is related to the corresponding driving voltage of the red, green and blue pixels.
  • the red, green and blue pixels are driven by the same voltage, however, the photoelectric characteristics of the liquid crystal At different voltages, the rotation angle of the liquid crystal molecules is different, and the photoelectric effect caused by the liquid crystal molecules will be different. Therefore, the white chromaticity caused by the driving of different voltages may drift.
  • VA type Very Alignment
  • the technical problem to be solved by the present application is to provide a white balance adjustment method and a display device for a display device which makes the display have better coordination continuity at a lower gray level and a better white balance effect. .
  • the present application provides a white balance adjustment method for a display device, comprising the steps of: measuring a stimulus value of each gray scale of each pixel of the panel; defining a white point voltage and a white chromaticity; calculating a bright white point voltage and dark The white chromaticity difference of the white point voltage; the target white balance curve is defined according to the white point voltage, the white chromaticity and the white chromaticity difference; and the white balance lookup table is obtained according to the white balance curve, and the white balance adjustment of the display device is completed.
  • the pixel includes a red pixel, a green pixel, and a blue pixel.
  • the three-dimensional system stimulus values corresponding to the gray scales of the red, green, and blue pixels of the panel in the standard colorimetric system are measured. .
  • the step of defining the white point voltage and the white chromaticity further comprises the step of: interpolating and calculating the stimulation value to 10 to 12 bits.
  • the white point voltage is the highest voltage corresponding to the highest value of the display device transmittance; the white chromaticity is the red pixel white chromaticity point and the green pixel white corresponding to the display device at the highest voltage. Chroma point and blue pixel white chroma point.
  • the definition of the white balance curve requires at least a white point voltage, a white chromaticity, and a white chromaticity difference, and wherein the white chromaticity refers to the corresponding display device at the highest voltage. Red pixel white chromaticity point, green pixel white chromaticity point and blue pixel white chromaticity point; calculating the above white chromaticity point will help to calculate the subsequent white point voltage, white chromaticity and white chromaticity difference.
  • the step of defining a target white balance curve according to a white point voltage, a white chromaticity, and a white chromaticity difference includes: respectively setting a chromaticity coordinate turning point according to a white point voltage, a white chromaticity, and a white chromaticity difference, Define the target white balance curve.
  • the white point voltage, white chromaticity and white chromaticity difference will be the calculation basis of the target white balance curve, so when drawing, the chromaticity coordinate turning point will be set to help obtain a more suitable target white balance.
  • the adjustment of the chromaticity coordinate turning point is a dynamic adjustment process.
  • the chromaticity coordinate turning point can be reduced to improve the white balance of the display device, and the white chromaticity difference is large.
  • the chromaticity coordinate turning point is raised, the problem of excessive brightness and chromaticity error is prevented, so that the chromaticity of the white balance and the drawing requirement of the brightness can be better satisfied; in addition, when adjusting the white balance of the display device, we According to the chromatic minimum error method, the white balance curve starts to turn to the dark white chromaticity at the minimum gray level of the bright white chromaticity error, which is the chromaticity coordinate turning point.
  • the method further comprises the step of: calculating the gray scale corresponding to the adjusted white by the root mean square minimum error method Red, green, and blue pixel lookup tables as adjusted
  • the white balance pixel lookup table maintains the white luminance gamma value equal to 2.2.
  • the white balance adjustment of the panel takes into account the problems of the dark white chromaticity and the bright white chromaticity, and in order to solve the problem, the white point voltage, the white chromaticity, and the white chromaticity difference are calculated and The relevant data, in this way, the white balance pixel lookup table obtained by the root mean square minimum error method will be able to solve the problem of poor coordination continuity at lower gray levels, and at the same time reduce the problem of chromaticity error.
  • Y refers to the Y coordinate system of the standard white colorimetric system
  • R refers to the gray scale value of the red pixel at different gray scale voltages
  • G refers to the gray scale value of the green pixel at different gray scale voltages
  • B refers to the gray scale value of the blue pixel under different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color under different gray scale voltages before adjustment
  • Wx refers to the white chroma X coordinate system coordinates Value
  • Wy is the white luminance Y coordinate system coordinate value
  • Wxtar is the target white chromaticity X coordinate system coordinate value
  • Wytar is the target white chromaticity Y coordinate system coordinate value.
  • the formula for calculating the optimization limit condition based on the target white balance curve can obtain a white balance lookup table that meets the requirements of the present application, so as to solve the problem that the low gray scale white chromaticity cannot be maintained and the chromaticity error becomes large. .
  • the pixel includes a red pixel, a green pixel, and a blue pixel; and the step of defining the white point voltage and the white chromaticity further includes the steps of: interpolating the stimulus value to 10 to 12 bits; the white point voltage That is, the highest voltage corresponding to the highest device transmittance is displayed; the white chromaticity is the red pixel white chromaticity point, the green pixel white chromaticity point, and the blue pixel white corresponding to the display device at the highest voltage. Chroma point.
  • the pixel includes a red pixel, a green pixel, and a blue pixel; and the step of defining a target white balance curve according to a white point voltage, a white chromaticity, and a white chromaticity difference includes: according to a white point voltage, a white chromaticity, and White chromaticity difference, after setting the chromaticity coordinate turning point, define the target white balance curve;
  • the method further includes the step of: calculating, by the root mean square minimum error method, the red pixel of each gray scale corresponding to the adjusted white color a green pixel and blue pixel lookup table as an adjusted white balance pixel lookup table to maintain a white luminance gamma value equal to 2.2;
  • Maintaining a white gamma gamma equal to 2.2 is subject to the following formula:
  • Y refers to the Y coordinate system of the standard white colorimetric system
  • R refers to the gray scale value of the red pixel at different gray scale voltages
  • G refers to the gray scale value of the green pixel at different gray scale voltages
  • B refers to the gray scale value of the blue pixel under different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color under different gray scale voltages before adjustment
  • Wx refers to the white chroma X coordinate system coordinates Value
  • Wy is the white luminance Y coordinate system coordinate value
  • Wxtar is the target white chromaticity X coordinate system coordinate value
  • Wytar is the target white chromaticity Y coordinate system coordinate value.
  • the present application also discloses a white balance adjustment method for a display device, comprising the steps of: measuring a stimulus value of each gray scale of each pixel of the panel, the pixel comprising a red pixel, a green pixel and a blue pixel; and interpolating and calculating the stimulus value Up to 10 to 12 bits; define white point voltage and white chromaticity; calculate white chromaticity difference between bright white point voltage and dark white point voltage; respectively set according to white point voltage, white chromaticity and white chromaticity difference After the chromaticity coordinate turning point, the target white balance curve is defined; the red pixel, green pixel and blue pixel lookup table of each gray scale corresponding to the adjusted white is calculated as the adjusted white balance pixel by the root mean square minimum error method. Looking up the table to maintain the white luminance gamma value equal to 2.2; and obtaining the adjusted white balance pixel lookup table according to the target white balance curve to complete the display device white balance adjustment.
  • the present application also discloses a display device, including: a white balance adjustment module; the white balance adjustment module includes: a stimulus value measurement unit, a white point voltage calculation unit, and a white balance adjustment unit.
  • the stimulation value measuring unit is configured to measure the stimulation value of each gray scale of each pixel of the panel;
  • the white point voltage calculation unit is used to define the white point voltage and the white chromaticity, and calculate the white color of the bright white point voltage and the dark white point voltage.
  • the difference the white balance adjustment unit is configured to define a target white balance curve according to the white point voltage, white chromaticity, and white chromaticity difference; and obtain a white balance lookup table according to the white balance curve to complete the display device white balance adjustment.
  • the white balance adjustment method of the present application not only considers the minimum error calculation with the white chromaticity and the coordinate system of the high gray scale, but also considers that the dark state white chromaticity cannot be adjusted due to the relationship between the liquid crystal rotation angle and the material property.
  • the white chromaticity of a gray-scale variation interval that exists when approaching the dark gray level cannot be maintained, and the chromaticity error becomes large; specifically, by measuring the gray scale of each pixel of the panel to define White point voltage and white chromaticity, and calculate the white chromaticity difference between the bright white point voltage and the dark white point voltage, and then define the target white balance curve according to the above white point voltage, white chromaticity and white chromaticity difference,
  • the obtained adjusted white balance lookup table is used to complete the white balance adjustment of the display device, can effectively improve the coordination characteristic of the white balance of the liquid crystal display, and has better performance such as color, and satisfies the image quality requirement of the best chroma and brightness. Special The coordination continuity at the lower gray level is better, and the white balance effect of the display device is better.
  • FIG. 1 is a schematic diagram of a white balance chromaticity curve before the original white balance adjustment of the present application
  • FIG. 2 is a schematic diagram of a white balance chromaticity curve after adjusting the original white balance of the present application
  • Figure 5 is a white chromaticity diagram of a second curve of white balance of the present application.
  • FIG. 6 is a target white balance curve diagram of a first curve of white balance of the present application.
  • Figure 8 is a schematic illustration of a display device of the present application.
  • FIG. 1 is a schematic diagram of a white balance chromaticity curve before the original white balance adjustment of the present application
  • FIG. 2 is a schematic diagram of a white balance chromaticity curve after the original white balance adjustment of the present application; wherein 1 is before the white balance adjustment
  • the first curve of white balance 2 is the second curve of white balance before white balance adjustment
  • 3 is the first curve of white balance after white balance adjustment
  • 4 is the second curve of white balance after white balance adjustment.
  • the white balance of the display is an important indicator of the quality of the display.
  • the liquid crystal display must be adjusted by white balance to maintain the white color of each gray level constant, otherwise the color performance of the display will be distorted. Case. Referring to FIG. 1 and FIG. 2, it can be seen that after the white balance adjustment, the color performance is better than before the white balance adjustment, but the adjustment method still has the problem that the panel penetration rate is not high enough.
  • the present application thus proposes the following improvements.
  • FIG. 3 is a flow chart of a white balance adjustment method of the present application
  • FIG. 4 is a white chromaticity diagram of the first curve of the white balance of the present application
  • FIG. 5 is a white chromaticity diagram of the second curve of the white balance of the present application
  • FIG. 6 is a schematic diagram of The target white balance curve of the first curve of the white balance of the present application
  • FIG. 7 is the target white balance curve of the second curve of the white balance of the present application; wherein 11 is the white chromaticity curve when the first curve coordinate turning point of the white balance is 16.
  • the second curve coordinate turning point is the white chromaticity curve at 80; 31 is the white balance first curve first coordinate turning point target curve, 32 is the white balance first curve second coordinate turning point target curve, 41 is the white balance second curve A coordinate turning point target curve, 42 is a white balance second curve second coordinate turning point target curve.
  • the present application provides a white balance adjustment method for a display device, including the steps of:
  • Step S11 measuring the stimulation value of each gray scale of each pixel of the panel
  • Step S12 defining a white point voltage and a white chromaticity
  • Step S13 calculating a white chromaticity difference between the bright white point voltage and the dark state white point voltage
  • Step S14 defining a target white balance curve according to a white point voltage, a white chromaticity, and a white chromaticity difference;
  • Step S15 Obtain a white balance lookup table according to the white balance curve, and complete the white balance adjustment of the display device.
  • the white balance adjustment method of the display device of the present application not only considers the minimum error calculation with the white chromaticity and the coordinate system of the high gray scale, but also considers that the dark white chromaticity cannot be caused due to the relationship between the liquid crystal rotation angle and the material characteristics. Adjusted to the white chromaticity of the bright state, so that the white chromaticity of a gray-scale change interval existing near the dark gray level cannot be maintained, and the chromaticity error becomes large; specifically, the gray scale of each pixel of the measurement panel is measured.
  • the obtained adjusted white balance lookup table is used to complete the white balance adjustment of the display device, can effectively improve the coordination characteristics of the white balance of the liquid crystal display, and has better performance such as color, and satisfies the best chroma and brightness.
  • the quality requirement in particular, the better coordination continuity at lower gray levels, appears to show better white balance of the display device.
  • the pixel includes a red pixel, a green pixel, and a blue pixel.
  • the three-dimensional system stimulus values corresponding to the gray scales of the red, green, and blue pixels of the panel in the standard colorimetric system are measured. .
  • the method before the step S12 of defining the white point voltage and the white chromaticity, the method further comprises the steps of:
  • Interpolation calculates the stimulus value to 10 to 12 bits.
  • the white point voltage is the highest voltage corresponding to the highest transmittance of the display device
  • the white chromaticity is the red pixel white chromaticity point, the green pixel white chromaticity point, and the blue pixel white chromaticity point corresponding to the display device at the highest voltage.
  • the definition of the white balance curve requires at least a white point voltage, a white chromaticity, and a white chromaticity difference, and wherein the white chromaticity refers to the corresponding display device at the highest voltage.
  • Red pixel white chromaticity point, green pixel white chromaticity point and blue pixel white chromaticity point; calculating the above white chromaticity point will help to calculate the subsequent white point voltage, white chromaticity and white chromaticity difference.
  • the step S14 of defining the target white balance curve according to the difference between the white point voltage, the white chromaticity and the white chromaticity includes:
  • the target white balance curve is defined after setting the chromaticity coordinate turning point according to the white point voltage, the white chromaticity, and the white chromaticity difference.
  • the white point voltage, white chromaticity and white chromaticity difference will be the calculation basis of the target white balance curve, so when drawing, the chromaticity coordinate turning point will be set to help obtain a more suitable target white balance.
  • the white balance curve will be The bright white chromaticity error begins at the minimum gray level and begins to turn to the dark white chromaticity, which is the chromaticity coordinate turning point.
  • the method further includes the following steps:
  • the red pixel, green pixel and blue pixel lookup table of each gray scale corresponding to the adjusted white is calculated by the root mean square minimum error method as an adjusted white balance pixel lookup table to maintain the white luminance gamma value equal to 2.2.
  • the white balance adjustment of the panel takes into account the problems of the dark white chromaticity and the bright white chromaticity, and in order to solve the problem, the white point voltage, the white chromaticity, and the white chromaticity difference are calculated and The relevant data, in this way, the white balance pixel lookup table obtained by the root mean square minimum error method will be able to solve the problem of poor coordination continuity at lower gray levels, and at the same time reduce the problem of chromaticity error.
  • Y refers to the Y coordinate system of the standard white colorimetric system
  • R refers to the gray scale value of the red pixel at different gray scale voltages
  • G refers to the gray scale value of the green pixel at different gray scale voltages
  • B refers to the gray scale value of the blue pixel under different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color under different gray scale voltages before adjustment
  • Wx refers to the white chroma X coordinate system coordinates Value
  • Wy is the white luminance Y coordinate system coordinate value
  • Wxtar is the target white chromaticity X coordinate system coordinate value
  • Wytar is the target white chromaticity Y coordinate system coordinate value.
  • the formula for calculating the optimization limit condition based on the target white balance curve can obtain a white balance lookup table that meets the requirements of the present application, so as to solve the problem that the low gray scale white chromaticity cannot be maintained and the chromaticity error becomes large. .
  • the pixel includes a red pixel, a green pixel, and a blue pixel;
  • the step of defining the white point voltage and the white chromaticity further includes the steps of: interpolating and calculating the stimulation value to 10 to 12 bits; the white point voltage is a highest voltage corresponding to the highest value of the display device transmittance; the white The chromaticity is the red pixel white chromaticity point, the green pixel white chromaticity point, and the blue pixel white chromaticity point corresponding to the display device at the highest voltage.
  • the pixel includes a red pixel, a green pixel, and a blue pixel;
  • the step of defining a target white balance curve according to a white point voltage, a white chromaticity, and a white chromaticity difference includes: defining a target white after setting a chromaticity coordinate turning point according to a white point voltage, a white chromaticity, and a white chromaticity difference respectively Balance curve
  • the method further includes the step of: calculating, by the root mean square minimum error method, the red pixel of each gray scale corresponding to the adjusted white color a green pixel and blue pixel lookup table as an adjusted white balance pixel lookup table to maintain a white luminance gamma value equal to 2.2;
  • Maintaining a white gamma gamma equal to 2.2 is subject to the following formula:
  • Y refers to the Y coordinate system of the standard white colorimetric system
  • R refers to the gray scale value of the red pixel at different gray scale voltages
  • G refers to the gray scale value of the green pixel at different gray scale voltages
  • B refers to the gray scale value of the blue pixel under different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color under different gray scale voltages before adjustment
  • Wx refers to the white chroma X coordinate system coordinates Value
  • Wy is the white luminance Y coordinate system coordinate value
  • Wxtar is the target white chromaticity X coordinate system coordinate value
  • Wytar is the target white chromaticity Y coordinate system coordinate value.
  • FIG. 8 is a schematic diagram of a display device according to the present application. Referring to FIG. 8 and FIG. 1 to FIG. 7 , the present application further discloses a display device 100 including:
  • the white balance adjustment module 50 includes:
  • the stimulation value measuring unit 51 is configured to measure the stimulation value of each gray scale of each pixel of the panel;
  • a white point voltage calculation unit 52 for defining a white point voltage and a white chromaticity, and calculating a white chromaticity difference between the bright white point voltage and the dark white point voltage;
  • the white balance adjusting unit 53 is configured to define a target white balance curve according to the white point voltage, the white chromaticity, and the white chromaticity difference; and obtain a white balance lookup table according to the white balance curve to complete the display device white balance adjustment.
  • the panel of the present application may be a TN panel (Twisted Nematic), an IPS panel (In-Plane Switching), a VA panel (Vertical Alignment), and an MVA panel (Multi-domain Vertical Alignment). , multi-quadrant vertical alignment technology), of course, can also be other types of panels, can be applied.

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Abstract

一种显示装置的白平衡调整方法和显示装置，白平衡调整方法包括步骤：测量面板各个像素各灰阶的刺激值（S11）；定义白点电压及白色色度（S12）；计算亮态白点电压以及暗态白点电压的白色色度差异（S13）；根据白点电压、白色色度和白色色度差异定义目标白平衡曲线（S14）；以及根据白平衡曲线获得白平衡查找表，完成显示装置白平衡调整（S15）。

Description

显示装置的白平衡调整方法和显示装置 技术领域
本申请涉及一种显示器技术领域，特别是涉及一种显示装置的白平衡调整方法和显示装置。
背景技术
随着科技的发展和进步，液晶显示器由于具备机身薄、省电和辐射低等热点而成为显示器的主流产品，各式各样的显示器广泛应用在生活中的方方面面。
而显示器的白平衡特性是显示器颜色优劣的一项重要指标，一般而言，液晶显示器必须透过白平衡的调整，才能将各灰阶的白色色度维持恒定，否则显示器的颜色表现将会出现失真的情况。
从液晶显示器驱动原理来看，显示器的白色色度会跟其相对应的红绿蓝像素的驱动电压相关，对于白色画面而言，其红绿蓝像素由相同电压驱动，然而，液晶的光电特性在不同电压下，液晶分子的旋转角度不同，所造成的光电效应会不一样，因而，在不同的电压的驱动下，所造成的白色色度会有漂移的情况发生。尤其在VA型(Vertical Alignment，垂直配向技术)液晶显示器的设计下，白色的亮态以及暗态色度差异极大，如何适当的调整白色各灰阶所对应的红绿蓝电压来校正白色色度，对于显示器而言，是相当重要的工作，因此，如何改良白平衡调整方法以防止画面色偏不良，改善画质成为本领域技术人员亟待解决的问题。
应该注意，上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
有鉴于现有技术的上述缺陷，本申请所要解决的技术问题是提供一种使得显示器在较低灰阶的协调连续性更佳，白平衡效果更好的显示装置的白平衡调整方法和显示装置。
为实现上述目的，本申请提供了一种显示装置的白平衡调整方法，包括步骤：测量面板各个像素各灰阶的刺激值；定义白点电压及白色色度；计算亮态白点电压以及暗态白点电压的白色色度差异；根据白点电压、白色色度和白色色度差异定义目标白平衡曲线；以及根据白平衡曲线获得白平衡查找表，完成显示装置白平衡调整。
进一步的，所述像素包括红色像素、绿色像素和蓝色像素。本实施方案中，具体的，在定义白点电压及白色色度之前，会测量该面板的红色像素、绿色像素和蓝色像素在标准色度学系统中对应各灰阶的三坐标系刺激值。
进一步的，所述定义白点电压及白色色度之前还包括步骤：内插计算所述刺激值至10到12比特。
进一步的，所述白点电压即显示装置穿透率最高值所对应的最高电压；所述白色色度即在所述最高电压下，显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点。本实施方案中，定义该白平衡曲线至少需要用到白点电压、白色色度和白色色度差异，而其中，该白色色度指的便是在所述最高电压下，显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点；计算得到上述的白色色度点将有助于后续白点电压、白色色度和白色色度差异的计算。
进一步的，所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤包括：根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线。本实施方案中，该白点电压、白色色度和白色色度差异将是该目标白平衡曲线的计算根据，因而在绘制时，将设定色度坐标转折点以帮助得到更适合的目标白平衡曲线；具体的，该色度坐标转折点的调整是一个动态调整的过程，在白色色度差异较小时，可以缩小色度坐标转折点以提高显示装置白平衡的效果，而在白色色度差异偏大时，则提高色度坐标转折点，防止亮度以及色度误差过大的问题，如此，便能够更好地满足白平衡的色度以及亮度的绘制需求；另外，在调整显示装置白平衡时，我们根据色度最小误差法，白平衡曲线会在亮态白色色度误差最小灰阶处开始转折至暗态白色色度，该点即色度坐标转折点。
进一步的，在所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤之后还包括步骤：通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的 白平衡像素查找表以維持白色亮度伽玛值等于2.2。本实施方案中，由于该面板的白平衡调整考虑到了暗态白色色度和亮态白色色度的问题，并为了解决该问题，计算得到了白点电压、白色色度和白色色度差异以及相关数据，如此，再去通过均方根最小误差法获得的白平衡像素查找表将能够解决在较低灰阶时，协调连续性不佳的问题，同时，减少了色度误差的问题。
进一步的，维持白色色度伽玛值等于2.2需符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wxtar)^2+(Wy-Wytar)^2)；
其中，Y指的是标准白色色度学系统的Y坐标系，R指的是红色像素在不同灰阶电压下的灰阶值，G指的是绿色像素在不同灰阶电压下的灰阶值，B指的是蓝色像素在不同灰阶电压下的灰阶值，LUT指的是调整前不同灰阶电压下的各颜色对应的灰阶值；Wx指的是白色色度X坐标系坐标值，Wy是白色亮度Y坐标系坐标值，Wxtar是目标白色色度X坐标系坐标值，Wytar是目标白色色度Y坐标系坐标值。本实施方案中，基于目标白平衡曲线进行了最佳化限制条件的公式计算可以得到符合本申请要求的白平衡查找表，以解决低灰阶白色色度无法维持，色度误差变大的问题。
进一步的，所述像素包括红色像素、绿色像素和蓝色像素；所述定义白点电压及白色色度之前还包括步骤：内插计算所述刺激值至10到12比特；所述白点电压即显示装置穿透率最高值所对应的最高电压；所述白色色度即在所述最高电压下，显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点。
进一步的，所述像素包括红色像素、绿色像素和蓝色像素；所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤包括：根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线；
在所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤之后还包括步骤：通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的白平衡像素查找表以維持白色亮度伽玛值等于2.2；
维持白色色度伽玛值等于2.2需符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wxtar)^2+(Wy-Wytar)^2)；
其中，Y指的是标准白色色度学系统的Y坐标系，R指的是红色像素在不同灰阶电压下的灰阶值，G指的是绿色像素在不同灰阶电压下的灰阶值，B指的是蓝色像素在不同灰阶电压下的灰阶值，LUT指的是调整前不同灰阶电压下的各颜色对应的灰阶值；Wx指的是白色色度X坐标系坐标值，Wy是白色亮度Y坐标系坐标值，Wxtar是目标白色色度X坐标系坐标值，Wytar是目标白色色度Y坐标系坐标值。
本申请还公开了一种显示装置的白平衡调整方法，包括步骤：测量面板各个像素各灰阶的刺激值，所述像素包括红色像素、绿色像素和蓝色像素；内插计算所述刺激值至10到12比特；定义白点电压及白色色度；计算亮态白点电压以及暗态白点电压的白色色度差异；根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线；通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的白平衡像素查找表以維持白色亮度伽玛值等于2.2；以及根据所述目标白平衡曲线获得调整后的所述白平衡像素查找表，完成显示装置白平衡调整。
本申请还公开了一种显示装置，包括：白平衡调整模块；所述白平衡调整模块包括：刺激值测量单元、白点电压计算单元以及白平衡调整单元。刺激值测量单元用于测量面板各个像素各灰阶的刺激值；白点电压计算单元用于定义白点电压及白色色度，并计算亮态白点电压以及暗态白点电压的白色色度差异；白平衡调整单元用于根据白点电压、白色色度和白色色度差异定义目标白平衡曲线；并根据白平衡曲线获得白平衡查找表，完成显示装置白平衡调整。本申请的白平衡调整方法，不仅考虑与高灰阶的白色色度及坐标系进行最小误差计算，而且，考虑到由于液晶旋转角度以及材料特性的关系而导致的暗态白色色度无法调整到与亮态白色色度一致，而使得在接近暗灰阶时存在的一灰阶变化区间白色色度无法维持，色度误差变大的问题；具体的，通过测量面板各个像素各灰阶以定义白点电压及白色色度，并计算亮态白点电压以及暗态白点电压的白色色度差异，再根据上述的白点电压、白色色度和白色色度差异定义目标白平衡曲线，如此，得到的调整后的白平衡查找表用于完成显示装置的白平衡调整，可以有效提高液晶显示器白平衡的协调特性，颜色等性能表现更佳，满足了最佳色度以及亮度的画质需求，特别 的，在较低灰阶的协调连续性更佳，显得显示装置的白平衡效果更好。
参照后文的说明和附图，详细公开了本申请的特定实施方式，指明了本申请的原理可以被采用的方式。应该理解，本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
所包括的附图用来提供对本申请实施例的进一步的理解，其构成了说明书的一部分，用于例示本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是本申请一种原有白平衡调整前的白平衡色度曲线示意图；
图2是本申请一种原有白平衡调整后的白平衡色度曲线示意图；
图3是本申请一种白平衡调整方法的流程图；
图4是本申请白平衡第一曲线的白色色度示意图；
图5是本申请白平衡第二曲线的白色色度示意图；
图6是本申请白平衡第一曲线的目标白平衡曲线图；
图7是本申请白平衡第二曲线的目标白平衡曲线图；以及
图8是本申请一种显示装置的示意图。
具体实施方式
为了使本技术领域的人员更好地理解本申请中的技术方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前 提下所获得的所有其它实施例，都应当属于本申请保护的范围。
图1是本申请一种原有白平衡调整前的白平衡色度曲线示意图；图2是本申请一种原有白平衡调整后的白平衡色度曲线示意图；其中，1是白平衡调整前白平衡第一曲线，2是白平衡调整前白平衡第二曲线，3是白平衡调整后白平衡第一曲线，4是白平衡调整后白平衡第二曲线。
显示器的白平衡特性是显示器优劣的一项重要指标，一般而言，液晶显示器必须透过白平衡的调整，才能将各灰阶的白色色度维持恒定，否则显示器的颜色表现将会出现失真的情况。参考图1和图2可知，白平衡调整之后将比白平衡调整之前，其颜色表现更佳，但是该调整方法仍然存在面板穿透率不够高的问题。
因而本申请提出了如下的改进方案。
图3是本申请一种白平衡调整方法的流程图，图4是本申请白平衡第一曲线的白色色度示意图，图5是本申请白平衡第二曲线的白色色度示意图，图6是本申请白平衡第一曲线的目标白平衡曲线图，图7是本申请白平衡第二曲线的目标白平衡曲线图；其中，11是白平衡第一曲线坐标转折点为16时的白色色度曲线，12是白平衡第一曲线坐标转折点为32时的白色色度曲线，13是白平衡第一曲线坐标转折点为48时的白色色度曲线，14是白平衡第一曲线坐标转折点为64时的白色色度曲线，15是白平衡第一曲线坐标转折点为80时的白色色度曲线；21是白平衡第二曲线坐标转折点为16时的白色色度曲线，22是白平衡第二曲线坐标转折点为32时的白色色度曲线，23是白平衡第二曲线坐标转折点为48时的白色色度曲线，24是白平衡第二曲线坐标转折点为64时的白色色度曲线，25是白平衡第二曲线坐标转折点为80时的白色色度曲线；31是白平衡第一曲线第一坐标转折点目标曲线，32是白平衡第一曲线第二坐标转折点目标曲线，41是白平衡第二曲线第一坐标转折点目标曲线，42是白平衡第二曲线第二坐标转折点目标曲线。
参考图3-图7可知，本申请提供了一种显示装置的白平衡调整方法包括步骤：
步骤S11：测量面板各个像素各灰阶的刺激值；
步骤S12：定义白点电压及白色色度；
步骤S13：计算亮态白点电压以及暗态白点电压的白色色度差异；
步骤S14：根据白点电压、白色色度和白色色度差异定义目标白平衡曲线；
步骤S15：根据白平衡曲线获得白平衡查找表，完成显示装置白平衡调整。
本申请的显示装置的白平衡调整方法不仅考虑与高灰阶的白色色度及坐标系进行最小误差计算，而且，考虑到由于液晶旋转角度以及材料特性的关系而导致的暗态白色色度无法调整到与亮态白色色度一致，而使得在接近暗灰阶时存在的一灰阶变化区间白色色度无法维持，色度误差变大的问题；具体的，通过测量面板各个像素各灰阶以定义白点电压及白色色度，并计算亮态白点电压以及暗态白点电压的白色色度差异，再根据上述的白点电压、白色色度和白色色度差异定义目标白平衡曲线，如此，得到的调整后的白平衡查找表用于完成显示装置的白平衡调整，可以有效提高液晶显示器白平衡的协调特性，颜色等性能表现更佳，满足了最佳色度以及亮度的画质需求，特别的，在较低灰阶的协调连续性更佳，显得显示装置的白平衡效果更好。
本实施例可选的，像素包括红色像素、绿色像素和蓝色像素。本实施方案中，具体的，在定义白点电压及白色色度之前，会测量该面板的红色像素、绿色像素和蓝色像素在标准色度学系统中对应各灰阶的三坐标系刺激值。
本实施例可选的，在定义白点电压及白色色度的步骤S12之前还包括步骤：
内插计算所述刺激值至10到12比特。
本实施例可选的，所述白点电压即显示装置穿透率最高值所对应的最高电压；
所述白色色度即在所述最高电压下，显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点。本实施方案中，定义该白平衡曲线至少需要用到白点电压、白色色度和白色色度差异，而其中，该白色色度指的便是在所述最高电压下，显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点；计算得到上述的白色色度点将有助于后续白点电压、白色色度和白色色度差异的计算。
本实施例可选的，在根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤S14包括：
根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线。本实施方案中，该白点电压、白色色度和白色色度差异将是该目标白平衡曲线的计算根据，因而在绘制时，将设定色度坐标转折点以帮助得到更适合的目标白平衡曲线；具体的，该色度坐标转折点的调整 是一个动态调整的过程，在白色色度差异较小时，可以缩小色度坐标转折点以提高显示装置白平衡的效果，而在白色色度差异偏大时，则提高色度坐标转折点，防止亮度以及色度误差过大的问题，如此，便能够更好地满足白平衡的色度以及亮度的绘制需求；另外，在调整显示装置白平衡时，我们根据色度最小误差法，白平衡曲线会在亮态白色色度误差最小灰阶处开始转折至暗态白色色度，该点即色度坐标转折点。
本实施例可选的，在所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤S14之后还包括步骤：
通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的白平衡像素查找表以維持白色亮度伽玛值等于2.2。本实施方案中，由于该面板的白平衡调整考虑到了暗态白色色度和亮态白色色度的问题，并为了解决该问题，计算得到了白点电压、白色色度和白色色度差异以及相关数据，如此，再去通过均方根最小误差法获得的白平衡像素查找表将能够解决在较低灰阶时，协调连续性不佳的问题，同时，减少了色度误差的问题。
本实施例可选的，维持白色色度伽玛值等于2.2需符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wxtar)^2+(Wy-Wytar)^2)；
其中，Y指的是标准白色色度学系统的Y坐标系，R指的是红色像素在不同灰阶电压下的灰阶值，G指的是绿色像素在不同灰阶电压下的灰阶值，B指的是蓝色像素在不同灰阶电压下的灰阶值，LUT指的是调整前不同灰阶电压下的各颜色对应的灰阶值；Wx指的是白色色度X坐标系坐标值，Wy是白色亮度Y坐标系坐标值，Wxtar是目标白色色度X坐标系坐标值，Wytar是目标白色色度Y坐标系坐标值。本实施方案中，基于目标白平衡曲线进行了最佳化限制条件的公式计算可以得到符合本申请要求的白平衡查找表，以解决低灰阶白色色度无法维持，色度误差变大的问题。
本实施例可选的，像素包括红色像素、绿色像素和蓝色像素；
所述定义白点电压及白色色度之前还包括步骤：内插计算所述刺激值至10到12比特；所述白点电压即显示装置穿透率最高值所对应的最高电压；所述白色色度即在所述最高电压下，显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点。
本实施例可选的，像素包括红色像素、绿色像素和蓝色像素；
所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤包括：根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线；
在所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤之后还包括步骤：通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的白平衡像素查找表以維持白色亮度伽玛值等于2.2；
维持白色色度伽玛值等于2.2需符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wxtar)^2+(Wy-Wytar)^2)；
其中，Y指的是标准白色色度学系统的Y坐标系，R指的是红色像素在不同灰阶电压下的灰阶值，G指的是绿色像素在不同灰阶电压下的灰阶值，B指的是蓝色像素在不同灰阶电压下的灰阶值，LUT指的是调整前不同灰阶电压下的各颜色对应的灰阶值；Wx指的是白色色度X坐标系坐标值，Wy是白色亮度Y坐标系坐标值，Wxtar是目标白色色度X坐标系坐标值，Wytar是目标白色色度Y坐标系坐标值。
图8是本申请一种显示装置的示意图，参考图8，结合图1-图7可知：本申请还公开了一种显示装置100，包括：
白平衡调整模块50；
所述白平衡调整模块50包括：
刺激值测量单元51，用于测量面板各个像素各灰阶的刺激值；
白点电压计算单元52，用于定义白点电压及白色色度，并计算亮态白点电压以及暗态白点电压的白色色度差异；以及
白平衡调整单元53，用于根据白点电压、白色色度和白色色度差异定义目标白平衡曲线；并根据白平衡曲线获得白平衡查找表，完成显示装置白平衡调整。本申请的面板可以是TN面板(Twisted Nematic，扭曲向列型面板)、IPS面板(In-Plane Switching，平面转换)、VA面板(Vertical Alignment，垂直配向技术)、MVA面板(Multi-domain Vertical Alignment，多象限垂直配向技术)，当然，也可以是其他类型的面板，适用即可。
以上详细描述了本申请的较佳具体实施例。应当理解，本领域的普通技 术人员无需创造性劳动就可以根据本申请的构思作出诸多修改和变化。因此，凡本技术领域中技术人员依本申请的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案，皆应在由权利要求书所确定的保护范围内。

Claims (19)

  1. 一种显示装置的白平衡调整方法，包括步骤：
    测量面板各个像素各灰阶的刺激值；
    定义白点电压及白色色度；
    计算亮态白点电压以及暗态白点电压的白色色度差异；
    根据白点电压、白色色度和白色色度差异定义目标白平衡曲线；以及
    根据白平衡曲线获得白平衡查找表，完成显示装置白平衡调整。
  2. 如权利要求1所述的显示装置的白平衡调整方法，其中所述像素包括红色像素、绿色像素和蓝色像素。
  3. 如权利要求2所述的显示装置的白平衡调整方法，其中所述定义白点电压及白色色度之前还包括步骤：
    内插计算所述刺激值至10到12比特。
  4. 如权利要求3所述的显示装置的白平衡调整方法，其中所述白点电压即显示装置穿透率最高值所对应的最高电压；
    所述白色色度即在所述最高电压下，所述显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点。
  5. 如权利要求2所述的显示装置的白平衡调整方法，其中所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤包括：
    根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线。
  6. 如权利要求5所述的显示装置的白平衡调整方法，其中在所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤之后还包括步骤：
    通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的白平衡像素查找表以維持白色亮度伽玛值等于2.2。
  7. 如权利要求6所述的显示装置的白平衡调整方法，其中维持白色色度伽玛值等于2.2需符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wxtar)^2+(Wy-Wytar)^2)；
    其中，Y指的是标准白色色度学系统的Y坐标系，R指的是红色像素在不同灰阶电压下的灰阶值，G指的是绿色像素在不同灰阶电压下的灰阶值，B指的是蓝色像素在不同灰阶电压下的灰阶值，LUT指的是调整前不同灰阶电压下的各颜色对应的灰阶值；Wx指的是白色色度X坐标系坐标值，Wy是白色亮度Y坐标系坐标值，Wxtar是暗态的白色色度X坐标系坐标值，Wytar是目标白色色度Y坐标系坐标值。
  8. 如权利要求1所述的显示装置的白平衡调整方法，其中所述像素包括红色像素、绿色像素和蓝色像素；
    所述定义白点电压及白色色度之前还包括步骤：内插计算所述刺激值至10到12比特；所述白点电压即显示装置穿透率最高值所对应的最高电压；所述白色色度即在所述最高电压下，显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点。
  9. 如权利要求1所述的显示装置的白平衡调整方法，其中所述像素包括红色像素、绿色像素和蓝色像素；
    所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤包括：根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线；
    在所述根据白点电压、白色色度和白色色度差异定义目标白平衡曲线的步骤之后还包括步骤：通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的白平衡像素查找表以維持白色亮度伽玛值等于2.2；
    维持白色色度伽玛值等于2.2需符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wxtar)^2+(Wy-Wytar)^2)；
    其中，Y指的是标准白色色度学系统的Y坐标系，R指的是红色像素在不同灰阶电压下的灰阶值，G指的是绿色像素在不同灰阶电压下的灰阶值，B指的是蓝色像素在不同灰阶电压下的灰阶值，LUT指的是调整前不同灰阶电压下的各颜色对应的灰阶值；Wx指的是白色色度X坐标系坐标值，Wy是白色亮度Y坐标系坐标值，Wxtar是目标白色色度X坐标系坐标值，Wytar是目标白色色度Y坐标系坐标值。
  10. 一种显示装置的白平衡调整方法，包括步骤：
    测量面板各个像素各灰阶的刺激值，所述像素包括红色像素、绿色像素和蓝色像素；
    内插计算所述刺激值至10到12比特；
    定义白点电压及白色色度；
    计算亮态白点电压以及暗态白点电压的白色色度差异；
    根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线；
    通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的白平衡像素查找表以維持白色亮度伽玛值等于2.2；以及
    根据所述目标白平衡曲线获得调整后的所述白平衡像素查找表，完成显示装置白平衡调整。
  11. 如权利要求10所述的显示装置的白平衡调整方法，其中所述白点电压即显示装置穿透率最高值所对应的最高电压；
    所述白色色度即在所述最高电压下，所述显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点。
  12. 如权利要求10所述的显示装置的白平衡调整方法，其中维持白色色度伽玛值等于2.2需符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wxtar)^2+(Wy-Wytar)^2)；
    其中，Y指的是标准白色色度学系统的Y坐标系，R指的是红色像素在不同灰阶电压下的灰阶值，G指的是绿色像素在不同灰阶电压下的灰阶值，B指的是蓝色像素在不同灰阶电压下的灰阶值，LUT指的是调整前不同灰阶电压下的各颜色对应的灰阶值；Wx指的是白色色度X坐标系坐标值，Wy是白色亮度Y坐标系坐标值，Wxtar是暗态的白色色度X坐标系坐标值，Wytar是目标白色色度Y坐标系坐标值。
  13. 一种显示装置，包括：
    白平衡调整模块；
    所述白平衡调整模块包括：
    刺激值测量单元，用于测量面板各个像素各灰阶的刺激值；
    白点电压计算单元，用于定义白点电压及白色色度，并计算亮态白点电 压以及暗态白点电压的白色色度差异；以及
    白平衡调整单元，用于根据白点电压、白色色度和白色色度差异定义目标白平衡曲线；并根据白平衡曲线获得白平衡查找表，完成显示装置白平衡调整。
  14. 如权利要求13所述的显示装置，其中所述像素包括红色像素、绿色像素和蓝色像素。
  15. 如权利要求13所述的显示装置，其中所述白平衡调整模块内插计算所述刺激值至10到12比特。
  16. 如权利要求15所述的显示装置，其中所述白点电压即显示装置穿透率最高值所对应的最高电压；
    所述白色色度即在所述最高电压下，所述显示装置所对应的红色像素白色色度点、绿色像素白色色度点和蓝色像素白色色度点。
  17. 如权利要求14所述的显示装置，其中所述白平衡调整单元根据白点电压、白色色度和白色色度差异，分别设定色度坐标转折点后，定义目标白平衡曲线。
  18. 如权利要求14所述的显示装置，其中所述白平衡调整单元通过均方根最小誤差法，计算得到调整后的白色对应的各灰阶的红色像素、绿色像素和蓝色像素查找表作为调整后的白平衡像素查找表以維持白色亮度伽玛值等于2.2。
  19. 如权利要求18所述的显示装置，其中维持白色色度伽玛值等于2.2需符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wxtar)^2+(Wy-Wytar)^2)；
    其中，Y指的是标准白色色度学系统的Y坐标系，R指的是红色像素在不同灰阶电压下的灰阶值，G指的是绿色像素在不同灰阶电压下的灰阶值，B指的是蓝色像素在不同灰阶电压下的灰阶值，LUT指的是调整前不同灰阶电压下的各颜色对应的灰阶值；Wx指的是白色色度X坐标系坐标值，Wy是白色亮度Y坐标系坐标值，Wxtar是暗态的白色色度X坐标系坐标值，Wytar是目标白色色度Y坐标系坐标值。
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