WO2019033640A1 - 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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WO2019033640A1
WO2019033640A1 PCT/CN2017/115908 CN2017115908W WO2019033640A1 WO 2019033640 A1 WO2019033640 A1 WO 2019033640A1 CN 2017115908 W CN2017115908 W CN 2017115908W WO 2019033640 A1 WO2019033640 A1 WO 2019033640A1
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Prior art keywords
pixel
value
gray scale
white
coordinate system
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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 US16/639,476 priority Critical patent/US11082676B2/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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • 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
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
    • G09G3/3637—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals with intermediate tones displayed by domain size control
    • 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
    • G09G2320/06—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

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 Under 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, under the driving of different voltages, the white chromaticity will be drifted. How to properly adjust the white color The red, green and blue voltages corresponding to the gray scales are used to correct the white chromaticity, which is a very important work for the display. How to better perform the white balance adjustment work is an urgent problem to be solved by those skilled in the art.
  • the technical problem to be solved by the present application is to provide a white display device which improves the transmittance of the entire panel and which does not have the problem of gray scale inversion or lookup table discontinuity. Balance adjustment method and display device.
  • 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; respectively defining a maximum voltage of each pixel The maximum value of the stimulus value; according to the highest voltage of each pixel, the white maximum voltage is redefined by the first white balance pixel lookup table; the target value of the white balance color pixel adjustment is defined by the white maximum voltage and the corresponding white chromaticity And obtaining the adjusted second white balance pixel lookup table to complete the display device white balance adjustment.
  • the pixel includes a red pixel, a green pixel, and a blue pixel.
  • the pixel may include a red pixel, a green pixel, and a blue pixel.
  • the blue pixel has a shorter wavelength, and thus the pixel is inverted first, but the maximum voltage is limited by the stimulus value.
  • the white maximum gamma voltage (the voltage of 255 gray scale at 8 bits) can be increased, which is effective. Increase the penetration rate of the panel.
  • the stimulus values of the gray scales of the respective pixels include a three-coordinate system stimulus value corresponding to each gray scale of the red pixel in the standard colorimetric system, and a three-coordinate corresponding to each gray scale of the green pixel in the standard colorimetric system.
  • the stimulus value and the blue pixel correspond to the three-coordinate system stimulus values of each gray scale in the standard colorimetric system.
  • the three-coordinate system three-color system in the standard colorimetric system corresponds to the three-coordinate system stimulation value of each gray level, and the highest voltage of the three types of red, green and blue pixels can be defined as the highest value of the stimulation value, thereby improving
  • the white maximum gamma voltage increases the overall transmittance of the panel.
  • the method further comprises the steps of: finding the inverse grayscale value of each coordinate system of the red pixel, the green pixel and the blue pixel in the standard colorimetric system. .
  • the blue wavelength is short, it is usually reversed earlier than red and green. Therefore, the voltage before the blue inversion point is selected to limit the gamma maximum voltage, specifically about the gray level 240.
  • the maximum voltage of each pixel is defined as the maximum value of the stimulus value, limiting the maximum voltage of the blue lookup table, and increasing the maximum voltage of the green lookup table and the red lookup table,
  • the white maximum gamma voltage at 8 bits, that is, the voltage of 255 gray scale
  • the method further comprises the step of: calculating the adjusted white correspondence by using a root mean square minimum error method
  • the red, green, and blue pixel lookup tables for each grayscale are used as the adjusted second white balance pixel lookup table to maintain the white luminance gamma value equal to 2.2.
  • the white maximum voltage obtained by using the second white balance pixel lookup table can reach the level of 255 gray scale voltage under 8 bits, and the lookup table of the first white balance pixel falls to about 240 gray scales.
  • the brightness is improved by about 5%, which effectively improves the transmittance and color performance of the panel.
  • the white luminance gamma value is equal to 2.2 and conforms to the following formula:
  • Y refers to the Y coordinate system of the standard 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 under different gray scale voltages
  • B refers to the gray scale value of the blue pixel at different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color of the second white balance pixel lookup table under different gray scale voltages
  • Wx refers to the white color Degree X coordinate system coordinate value
  • Wy is white luminance Y coordinate system coordinate value
  • Wx0 dark state white chromaticity X coordinate system coordinate value
  • Wy0 is dark state white chromaticity Y coordinate system coordinate value
  • a white balance constraint similar to the first white balance pixel lookup table, but adjusted.
  • the pixel includes a red pixel, a green pixel, and a blue pixel; the stimulus values of each grayscale of each pixel include a three-coordinate system stimulus value corresponding to each grayscale of the red pixel in the standard colorimetric system, and a green pixel
  • the step of white chromaticity defining the target value of the white balance color pixel adjustment further includes the steps of: calculating the red pixel, the green pixel, and the blue pixel of each gray scale corresponding to the adjusted white by the root mean square minimum error method.
  • the table serves as an adjusted second white balance pixel lookup table to maintain a white luminance gamma value equal to 2.2; the white luminance gamma value equals 2.2 to conform to the following formula:
  • Y refers to the Y coordinate system of the standard 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 under different gray scale voltages
  • B refers to the gray scale value of the blue pixel at different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color of the second white balance pixel lookup table under different gray scale voltages
  • Wx refers to the white color Degree X coordinate system coordinate value
  • Wy is the white brightness Y coordinate system coordinate value
  • Wx0 is the dark state white chromaticity X coordinate system coordinate value
  • Wy0 is the dark state white chromaticity Y coordinate system coordinate value.
  • the pixel includes a red pixel, a green pixel, and a blue pixel;
  • the stimulus values of each grayscale of each pixel include a three-coordinate system stimulus value corresponding to each grayscale of the red pixel in the standard colorimetric system, and a green pixel a three-coordinate system stimulus value corresponding to each gray scale in a standard colorimetric system and a three-coordinate system stimulus value corresponding to each gray scale in a standard colorimetric system;
  • the step of stimulating values of each gray scale of each pixel further includes the steps of: finding the inverted gray scale values of the red, green, and blue pixels in the coordinate system of the standard colorimetric system.
  • the method further comprises the step of: calculating the gray scale corresponding to the adjusted white by the root mean square minimum error method
  • the red pixel, green pixel and blue pixel lookup table are used as the adjusted second white balance pixel lookup table to maintain the white luminance gamma value equal to 2.2; the white luminance gamma value equals 2.2 according to the following formula:
  • Y refers to the Y coordinate system of the standard 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 under different gray scale voltages
  • B refers to the gray scale value of the blue pixel at different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color of the second white balance pixel lookup table under different gray scale voltages
  • Wx refers to the white color Degree X coordinate system coordinate value
  • Wy is the white brightness Y coordinate system coordinate value
  • Wx0 is the dark state white chromaticity X coordinate system coordinate value
  • Wy0 is the dark state 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 includes a red pixel, a green pixel, and a blue pixel; and finding a red pixel and a green pixel And the inverted grayscale value of each pixel of the blue pixel in the standard colorimetric system; respectively, the highest voltage of each pixel is defined as the maximum value of the stimulus value; according to the highest voltage of each pixel, the first white balance pixel is used to search
  • the table redefines the white maximum voltage; defines the target value of the white balance color pixel degree adjustment by using the white maximum voltage and the corresponding white chromaticity; and calculates the gray scale corresponding to the adjusted white by the root mean square minimum error method a red pixel, a green pixel, and a blue pixel lookup table as an adjusted second white balance pixel lookup table to maintain a white luminance gamma value equal to 2.2; and obtain the adjusted
  • 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 highest voltage definition 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 highest voltage defining unit is configured to respectively define the highest voltage of each pixel to the maximum value of the stimulation value, and utilize the first according to the highest voltage of each pixel.
  • the white balance pixel lookup table redefines the white maximum voltage; the white balance adjustment unit is configured to define the white balance color pixel by using the white maximum voltage and the corresponding white chromaticity Adjust the target value of the degree, and obtain the adjusted second white balance pixel lookup table to complete the white balance adjustment of the display device.
  • the first white balance pixel lookup table used previously generally sets the white maximum voltage (or the gamma maximum voltage) to a voltage value that is not inverted in the three coordinate system, and because some of the constituent pixels are formed. (For example, if the red, green and blue pixels are shorter, the blue wavelength is shorter), the wavelength is shorter than the remaining constituent pixels, which limits the maximum gamma voltage.
  • the maximum value of the stimulus value is used in the present application. Defining the highest voltage of each pixel to the maximum value of the stimulus value increases the maximum voltage of each component pixel, thereby increasing the transmittance of the entire panel, and there is no problem of gray scale inversion or lookup table discontinuity.
  • 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 4 is a first schematic diagram of the red, green and blue stimulation values of the present application.
  • Figure 5 is a second schematic diagram of the red, green and blue stimulation values of the present application.
  • Figure 6 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 first schematic diagram of red, green and blue stimulation values of the present application
  • FIG. 5 is a second schematic diagram of red, green and blue stimulation values of the present application, wherein 11 refers to red
  • the first curve, 12 refers to the red second curve
  • 13 refers to the red third curve
  • 14 refers to the green first curve
  • 15 refers to the green second curve
  • 16 refers to the green third curve
  • 16 refers to the green third curve
  • 17 refers to the blue first curve
  • 18 refers to the blue second curve
  • 19 refers to the blue third curve
  • 20 refers to the blue highest voltage line
  • 21 refers to the red first curve
  • 22 refers to the red curve
  • the second curve, 23 refers to the red third curve
  • 24 refers to the green first curve
  • 25 refers to the green second curve
  • 26 refers to the green third curve
  • 27 refers to the blue first 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 respectively defining the highest voltage of each pixel as the maximum value of the stimulation value
  • Step S13 Re-determining the first white balance pixel lookup table according to the highest voltage of each pixel Right white maximum voltage
  • Step S14 Defining a target value of the white balance color pixel degree adjustment by using the white maximum voltage and the corresponding white chromaticity;
  • Step S15 Acquire an adjusted second white balance pixel lookup table to complete display device white balance adjustment.
  • the first white balance pixel lookup table used previously generally sets the white maximum voltage (or the gamma maximum voltage) to a voltage value that is not inverted in the three coordinate system, and because some of the constituent pixels are formed. (For example, if the red, green and blue pixels are shorter, the blue wavelength is shorter), the wavelength is shorter than the remaining constituent pixels, which limits the maximum gamma voltage.
  • the maximum value of the stimulus value is used in the present application. Defining the highest voltage of each pixel to the maximum value of the stimulus value increases the maximum voltage of each component pixel, thereby increasing the transmittance of the entire panel, and there is no problem of gray scale inversion or lookup table discontinuity.
  • the pixel includes a red pixel, a green pixel, and a blue pixel.
  • the pixel may include a red pixel, a green pixel, and a blue pixel.
  • the blue pixel has a shorter wavelength, and thus the pixel is inverted first, but the maximum voltage is limited by the stimulus value.
  • the white maximum gamma voltage (the voltage of 255 gray scale at 8 bits) can be increased, which is effective. Increase the penetration rate of the panel.
  • the stimulus values of the gray scales of the respective pixels in the step S11 include the three-coordinate system stimulation values corresponding to the gray scales of the red pixels in the standard colorimetric system, and the green pixels in the standard colorimetry.
  • the three-coordinate system three-color system in the standard colorimetric system corresponds to the three-coordinate system stimulation value of each gray level, and the highest voltage of the three types of red, green and blue pixels can be defined as the highest value of the stimulation value, thereby improving The white maximum gamma voltage increases the overall transmittance of the panel.
  • the method further includes the following steps:
  • the voltage before the blue inversion point is selected to limit the gamma maximum voltage, specifically about the gray level 240.
  • this application uses the maximum value of the stimulus value to maximize the maximum of each pixel
  • the voltage is defined as the maximum value of the stimulus value, limits the maximum voltage of the blue lookup table, and increases the maximum voltage of the green lookup table and the red lookup table, thereby increasing the white maximum gamma voltage (at 8 bits, ie 255 grayscale) Voltage) to improve the transmittance of the overall panel, and there is no grayscale inversion or a problem of misalignment of the lookup table.
  • 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 using the root mean square minimum error method as the adjusted second white balance pixel lookup table to maintain the white luminance gamma value equal to 2.2.
  • the white maximum voltage obtained by using the second white balance pixel lookup table can reach a level of 255 gray scale voltage at 8 bits, and the brightness of the first white balance pixel lookup table is about 240 gray scales. Increased by about 5%, effectively improving the panel's penetration and color performance.
  • the white luminance gamma value is equal to 2.2 and conforms to the following formula:
  • Y refers to the Y coordinate system of the standard 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 under different gray scale voltages
  • B refers to the gray scale value of the blue pixel at different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color of the second white balance pixel lookup table under different gray scale voltages
  • Wx refers to the white color Degree X coordinate system coordinate value
  • Wy is white luminance Y coordinate system coordinate value
  • Wx0 dark state white chromaticity X coordinate system coordinate value
  • Wy0 is dark state white chromaticity Y coordinate system coordinate value
  • a white balance constraint similar to the first white balance pixel lookup table, but adjusted.
  • the pixel includes a red pixel, a green pixel, and a blue pixel;
  • the stimulus values of each gray scale of each pixel include a three-coordinate system stimulus value corresponding to each gray scale of a red pixel in a standard colorimetric system, and a three-coordinate system stimulus value corresponding to each gray scale in a standard colorimetric system. And blue pixels correspond to the three-coordinate system stimulus values of each gray level in the standard colorimetric system;
  • the step S11 is further included after the step S11 of measuring the stimulation value of each gray scale of each pixel of the panel:
  • the pixel includes a red pixel, a green pixel, and a blue pixel;
  • the stimulus values of each gray scale of each pixel include red pixels corresponding to each in a standard colorimetric system
  • the step of defining the target value of the white balance color pixel degree adjustment by the white maximum voltage and the corresponding white chromaticity further includes the steps of:
  • the red pixel, green pixel and blue pixel lookup table of each gray scale corresponding to the adjusted white is calculated by using the root mean square minimum error method as the adjusted second white balance pixel lookup table to maintain the white luminance gamma value equal to 2.2;
  • the white luminance gamma value is equal to 2.2 and conforms to the following formula:
  • Y refers to the Y coordinate system of the standard 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 under different gray scale voltages
  • B refers to the gray scale value of the blue pixel at different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color of the second white balance pixel lookup table under different gray scale voltages
  • Wx refers to the white color Degree X coordinate system coordinate value
  • Wy is the white brightness Y coordinate system coordinate value
  • Wx0 is the dark state white chromaticity X coordinate system coordinate value
  • Wy0 is the dark state white chromaticity Y coordinate system coordinate value.
  • the pixel includes a red pixel, a green pixel, and a blue pixel;
  • the stimulus values of each gray scale of each pixel include a three-coordinate system stimulus value corresponding to each gray scale of a red pixel in a standard colorimetric system, and a three-coordinate system stimulus value corresponding to each gray scale in a standard colorimetric system. And blue pixels correspond to the three-coordinate system stimulus values of each gray level in the standard colorimetric system;
  • the step of measuring the stimulus value of each gray scale of each pixel of the panel further includes the following steps:
  • the step of defining the target value of the white balance color pixel degree adjustment by the white maximum voltage and the corresponding white chromaticity further includes the steps of:
  • the red pixel, green pixel and blue pixel lookup table of each gray scale corresponding to the adjusted white is calculated by using the root mean square minimum error method as the adjusted second white balance pixel lookup table to maintain the white luminance gamma value equal to 2.2;
  • the white luminance gamma value is equal to 2.2 and conforms to the following formula:
  • Y refers to the Y coordinate system of the standard 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 under different gray scale voltages
  • B refers to the gray scale value of the blue pixel at different gray scale voltages
  • LUT refers to the gray scale value corresponding to each color of the second white balance pixel lookup table under different gray scale voltages
  • Wx refers to the white color Degree X coordinate system coordinate value
  • Wy is the white brightness Y coordinate system coordinate value
  • Wx0 is the dark state white chromaticity X coordinate system coordinate value
  • Wy0 is the dark state white chromaticity Y coordinate system coordinate value.
  • FIG. 6 is a schematic diagram of a display device according to the present application. Referring to FIG. 6 and FIG. 1 to FIG. 5, the present application further discloses a display device 100.
  • the display device 100 includes:
  • the white balance adjustment module 40; the white balance adjustment module 40 includes:
  • the stimulation value measuring unit 41 is configured to measure the stimulation value of each gray scale of each pixel of the panel;
  • a white highest voltage defining unit 42 for respectively defining a highest voltage of each pixel at a maximum value of the stimulation value, and redefining a white maximum voltage using the first white balance pixel lookup table according to the highest voltage of each pixel;
  • the white balance adjustment unit 43 is configured to define a target value of the white balance color pixel degree adjustment by using the white maximum voltage and the corresponding white chromaticity, and obtain the adjusted second white balance pixel lookup table 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).
  • TN panel Transmission Nematic
  • IPS panel In-Plane Switching
  • VA panel Very Alignment
  • MVA panel Multi-domain Vertical Alignment
  • multi-quadrant vertical alignment technology 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，该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；分别将各个像素的最高电压定义在刺激值的最大值；根据各个像素的最高电压，利用第一白平衡像素查找表重新定义白色最高电压；利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值；以及获取调整后的第二白平衡像素查找表，完成显示装置白平衡调整。

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，如何适当的调整白色各灰阶所相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，如何更好地完成白平衡的调整工作是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提升了整体面板的穿透率，而且，不会出现灰阶反转或者查找表不连续的问题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；分别将各个像素的最高电压定义 在刺激值的最大值；根据各个像素的最高电压，利用第一白平衡像素查找表重新定义白色最高电压；利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值；以及获取调整后的第二白平衡像素查找表，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，该像素可以包括红色像素、绿色像素和蓝色像素，此时，该蓝色像素的波长较短，因而会先行反转，但借由该刺激值可以限制其最高电压在刺激值的最大值处，同时借由该刺激值的最大值调高绿色像素和蓝色像素的最高电压，便可以提高白色最高伽玛电压(在8bit下，即为255灰阶的电压)，有效增加面板的穿透率。
进一步的，所述各个像素各灰阶的刺激值包括红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、绿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。本实施方案中，测量出三基色在标准色度学系统中对应各灰阶的三坐标系刺激值，可以对后续将红绿蓝三种像素的最高电压定义在刺激值的最高值，从而提高白色最高伽玛电压而提高面板的整体穿透率。
进一步的，在所述测量面板各个像素各灰阶的刺激值的步骤之后还包括步骤：找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值。本实施方案中，由于蓝色波长较短的缘故，通常会比红色和绿色先反转，故而选择蓝色反转点之前的电压则限制了伽玛最高电压，具体大约在灰阶240左右的位置；本申请借由该刺激值的最大值，将各个像素的最高电压定义在刺激值的最大值，限制蓝色查找表的最高电压，同时调高绿色查找表和红色查找表的最高电压，从而提高白色最高伽玛电压(在8bit下，即为255灰阶的电压)来提升了整体面板的穿透率，且不会有灰阶反转或者是查找表不连续的问题。
进一步的，在所述利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值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第二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，使用该第二白平衡像素查找表得到的白色最高电压可以达到在8bit下，255灰阶电压的程度，相对于第一白平衡像素查找表落在240灰阶左右的 亮度，提升了约5％左右，有效提升了面板的穿透率和颜色表现性能。
进一步的，所述白色亮度伽玛值等于2.2符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
其中，Y指的是标准色度学系统的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指的是第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度Y坐标系坐标值；本实施方案中，使用了与类似于第一白平衡像素查找表类似的白平衡限制条件，但进行了调整。
进一步的，所述像素包括红色像素、绿色像素和蓝色像素；所述各个像素各灰阶的刺激值包括红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、绿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；在所述将白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值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第二白平衡像素查找表以維持白色亮度伽玛值等于2.2；所述白色亮度伽玛值等于2.2符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
其中，Y指的是标准色度学系统的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指的是第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度Y坐标系坐标值。
进一步的，所述像素包括红色像素、绿色像素和蓝色像素；所述各个像素各灰阶的刺激值包括红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、绿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；在所述测量面板各 个像素各灰阶的刺激值的步骤之后还包括步骤：找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值。
在所述将白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值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第二白平衡像素查找表以維持白色亮度伽玛值等于2.2；所述白色亮度伽玛值等于2.2符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
其中，Y指的是标准色度学系统的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指的是第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度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；找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值；分别将各个像素的最高电压定义在刺激值的最大值；根据各个像素的最高电压，利用第一白平衡像素查找表重新定义白色最高电压；利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值；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第二白平衡像素查找表以維持白色亮度伽玛值等于2.2；以及获取调整后的所述第二白平衡像素查找表，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、白色最高电压定义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；白色最高电压定义单元用于分别将各个像素的最高电压定义在刺激值的最大值，并根据各个像素的最高电压，利用第一白平衡像素查找表重新定义白色最高电压；白平衡调整单元用于利用该白色最高电压以及所对应的白色色度定义白平衡色像素 度调节的目标值，并获取调整后的第二白平衡像素查找表，完成显示装置白平衡调整。
本申请的白平衡调整方法中，之前使用的第一白平衡像素查找表一般将白色最高电压(或者说伽玛最高电压)定在三坐标系没有反转的电压值，而由于其中部分组成像素(例如，若为红绿蓝像素，则其中蓝色波长较短)的波长较短，比其余组成像素先行反转，限制了伽玛最高电压，本申请则借由该刺激值的最大值，将各个像素的最高电压定义在刺激值的最大值，提高了各组成像素的最高电压，因而提升了整体面板的穿透率，而且，不会出现灰阶反转或者查找表不连续的问题。
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是本申请红绿蓝刺激值第一示意图；
图5是本申请红绿蓝刺激值第二示意图；以及
图6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是本申请红绿蓝刺激值第一示意图，图5是本申请红绿蓝刺激值第二示意图，其中，11指的是红第一曲线，12指的是红第二曲线，13指的是红第三曲线，14指的是绿第一曲线，15指的是绿第二曲线，16指的是绿第三曲线，17指的是蓝第一曲线，18指的是蓝第二曲线，19指的是蓝第三曲线；20指的是蓝色最高电压线；21指的是红色第一曲线，22指的是红色第二曲线，23指的是红色第三曲线，24指的是绿色第一曲线，25指的是绿色第二曲线，26指的是绿色第三曲线，27指的是蓝色第一曲线，28指的是蓝色第二曲线，29指的是蓝色第三曲线，30指的是绿蓝最高电压线。
参考图3-图5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：分别将各个像素的最高电压定义在刺激值的最大值；
步骤S13：根据各个像素的最高电压，利用第一白平衡像素查找表重新定 义白色最高电压；
步骤S14：利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值；
步骤S15：获取调整后的第二白平衡像素查找表，完成显示装置白平衡调整。
本申请的白平衡调整方法中，之前使用的第一白平衡像素查找表一般将白色最高电压(或者说伽玛最高电压)定在三坐标系没有反转的电压值，而由于其中部分组成像素(例如，若为红绿蓝像素，则其中蓝色波长较短)的波长较短，比其余组成像素先行反转，限制了伽玛最高电压，本申请则借由该刺激值的最大值，将各个像素的最高电压定义在刺激值的最大值，提高了各组成像素的最高电压，因而提升了整体面板的穿透率，而且，不会出现灰阶反转或者查找表不连续的问题。
本实施例可选的，像素包括红色像素、绿色像素和蓝色像素。本实施方案中，该像素可以包括红色像素、绿色像素和蓝色像素，此时，该蓝色像素的波长较短，因而会先行反转，但借由该刺激值可以限制其最高电压在刺激值的最大值处，同时借由该刺激值的最大值调高绿色像素和蓝色像素的最高电压，便可以提高白色最高伽玛电压(在8bit下，即为255灰阶的电压)，有效增加面板的穿透率。
本实施例可选的，其中，该步骤S11中的各个像素各灰阶的刺激值包括红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、绿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。本实施方案中，测量出三基色在标准色度学系统中对应各灰阶的三坐标系刺激值，可以对后续将红绿蓝三种像素的最高电压定义在刺激值的最高值，从而提高白色最高伽玛电压而提高面板的整体穿透率。
本实施例可选的，在所述测量面板各个像素各灰阶的刺激值的步骤S11之后还包括步骤：
找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值。本实施方案中，由于蓝色波长较短的缘故，通常会比红色和绿色先反转，故而选择蓝色反转点之前的电压则限制了伽玛最高电压，具体大约在灰阶240左右的位置；本申请借由该刺激值的最大值，将各个像素的最高 电压定义在刺激值的最大值，限制蓝色查找表的最高电压，同时调高绿色查找表和红色查找表的最高电压，从而提高白色最高伽玛电压(在8bit下，即为255灰阶的电压)来提升了整体面板的穿透率，且不会有灰阶反转或者是查找表不连续的问题。
本实施例可选的，在所述利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值的步骤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第二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，使用该第二白平衡像素查找表得到的白色最高电压可以达到在8bit下，255灰阶电压的程度，相对于第一白平衡像素查找表落在240灰阶左右的亮度，提升了约5％左右，有效提升了面板的穿透率和颜色表现性能。
本实施例可选的，所述白色亮度伽玛值等于2.2符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
其中，Y指的是标准色度学系统的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指的是第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度Y坐标系坐标值；本实施方案中，使用了与类似于第一白平衡像素查找表类似的白平衡限制条件，但进行了调整。
本实施例可选的，所述像素包括红色像素、绿色像素和蓝色像素；
所述各个像素各灰阶的刺激值包括红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、绿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；
在所述测量面板各个像素各灰阶的刺激值的步骤S11之后还包括步骤：
找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值。
本实施例可选的，所述像素包括红色像素、绿色像素和蓝色像素；
所述各个像素各灰阶的刺激值包括红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、绿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；
在所述将白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值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第二白平衡像素查找表以維持白色亮度伽玛值等于2.2；
所述白色亮度伽玛值等于2.2符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
其中，Y指的是标准色度学系统的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指的是第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度Y坐标系坐标值。
本实施例可选的，像素包括红色像素、绿色像素和蓝色像素；
所述各个像素各灰阶的刺激值包括红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、绿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；
在所述测量面板各个像素各灰阶的刺激值的步骤之后还包括步骤：
找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值。
在所述将白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值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第二白平衡像素查找表以維持白色亮度伽玛值等于2.2；
所述白色亮度伽玛值等于2.2符合如下公式：
1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
其中，Y指的是标准色度学系统的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指的是第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度Y坐标系坐标值。
图6是本申请一种显示装置的示意图，参考图6，结合图1-图5可知：本申请还公开了一种显示装置100，该显示装置100包括：
白平衡调整模块40；所述白平衡调整模块40包括：
刺激值测量单元41，用于测量面板各个像素各灰阶的刺激值；
白色最高电压定义单元42，用于分别将各个像素的最高电压定义在刺激值的最大值，并根据各个像素的最高电压，利用第一白平衡像素查找表重新定义白色最高电压；以及
白平衡调整单元43，用于利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值，并获取调整后的第二白平衡像素查找表，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 (17)

  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；
    分别将各个像素的最高电压定义在刺激值的最大值；
    根据各个像素的最高电压，利用第一白平衡像素查找表重新定义白色最高电压；
    利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值；以及
    获取调整后的第二白平衡像素查找表，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，其中所述各个像素各灰阶的刺激值包括红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、绿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。
  4. 如权利要求2所述的显示装置的白平衡调整方法，其中在所述测量面板各个像素各灰阶的刺激值的步骤之后还包括步骤：
    找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值。
  5. 如权利要求2所述的显示装置的白平衡调整方法，其中在所述利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值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所述第二白平衡像素查找表以維持白色亮度伽玛值等于2.2。
  6. 如权利要求5所述的显示装置的白平衡调整方法，其中所述白色亮度伽玛值等于2.2符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
    其中，Y指的是标准色度学系统的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指的是所述第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度Y坐标系坐标值。
  7. 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；
    所述各个像素各灰阶的刺激值包括红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、绿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；
    在所述测量面板各个像素各灰阶的刺激值的步骤之后还包括步骤：
    找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值。
  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；
    所述各个像素各灰阶的刺激值包括红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、绿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；
    在所述将白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值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第二白平衡像素查找表以維持白色亮度伽玛值等于2.2；
    所述白色亮度伽玛值等于2.2符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
    其中，Y指的是标准色度学系统的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指的是第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标 值，Wy0是暗态白色色度Y坐标系坐标值。
  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；
    所述各个像素各灰阶的刺激值包括红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、绿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；
    在所述测量面板各个像素各灰阶的刺激值的步骤之后还包括步骤：
    找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值；
    在所述将白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值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所述第二白平衡像素查找表以維持白色亮度伽玛值等于2.2；
    所述白色亮度伽玛值等于2.2符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
    其中，Y指的是标准色度学系统的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指的是所述第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度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；
    找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值；
    分别将各个像素的最高电压定义在刺激值的最大值；
    根据各个像素的最高电压，利用第一白平衡像素查找表重新定义白色最高电压；
    利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值；
    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第二白平衡像素查找表以維持白色亮度伽玛值等于2.2；以及
    获取调整后的所述第二白平衡像素查找表，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，其中所述白色亮度伽玛值等于2.2符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
    其中，Y指的是标准色度学系统的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指的是所述第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度Y坐标系坐标值。
  12. 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；
    白色最高电压定义单元，用于分别将各个像素的最高电压定义在刺激值的最大值，并根据各个像素的最高电压，利用第一白平衡像素查找表重新定义白色最高电压；以及
    白平衡调整单元，用于利用该白色最高电压以及所对应的白色色度定义白平衡色像素度调节的目标值，并获取调整后的第二白平衡像素查找表，完成显示装置白平衡调整。
  13. 如权利要求12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。
  14. 如权利要求13所述的显示装置，其中所述各个像素各灰阶的刺激值包括红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、绿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。
  15. 如权利要求13所述的显示装置，其中所述刺激值测量单元找出红色像素、绿色像素和蓝色像素在标准色度学系统中各坐标系的反转灰阶值。
  16. 如权利要求13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所述第二白平衡像素查找表以維持白色亮度伽玛值等于2.2。
  17. 如权利要求16所述的显示装置，其中所述白色亮度伽玛值等于2.2符合如下公式：
    1)：Y(R-LUT)+Y(G-LUT)+Y(B-LUT)＝gamma2.2；
    2)：Min((Wx-Wx0)^2+(Wy-Wy0)^2)；
    其中，Y指的是标准色度学系统的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指的是所述第二白平衡像素查找表在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，Wx0是暗态白色色度X坐标系坐标值，Wy0是暗态白色色度Y坐标系坐标值。
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