WO2016061944A1 - 白光oled显示装置及其显示控制方法、显示控制装置 - Google Patents

白光oled显示装置及其显示控制方法、显示控制装置 Download PDF

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WO2016061944A1
WO2016061944A1 PCT/CN2015/072302 CN2015072302W WO2016061944A1 WO 2016061944 A1 WO2016061944 A1 WO 2016061944A1 CN 2015072302 W CN2015072302 W CN 2015072302W WO 2016061944 A1 WO2016061944 A1 WO 2016061944A1
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white
sub
value
data
red
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PCT/CN2015/072302
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English (en)
French (fr)
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曾思衡
宋丹娜
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京东方科技集团股份有限公司
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Priority to EP15748155.7A priority Critical patent/EP3211631B1/en
Priority to US14/769,415 priority patent/US9870728B2/en
Publication of WO2016061944A1 publication Critical patent/WO2016061944A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003—Display of colours
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/00—2D [Two Dimensional] image generation
    • G06T11/001—Texturing; Colouring; Generation of texture or colour
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • 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
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present disclosure relates to the field of organic light emitting diode (OLED) display technologies, and in particular, to a white light OLED display device, a display control method thereof, and a display device.
  • OLED organic light emitting diode
  • AMOLED Active Matrix Organic Light Emitting Diode
  • the traditional white light AMOLED panel is realized by white light OLED (WOLED) plus RGB three color filter (CF).
  • WOLED white light OLED
  • RGB three color filter CF
  • the transmittance of the RGB three color color filters is relatively low, and most of the energy of the white light emitted by the WOLED is absorbed by the color filter.
  • the current causes the power consumption of the display panel to increase, and the lifetime of the WOLED is also shortened.
  • the white light AMOLED panel of the RGBW display mode is composed of four colors of WOLED plus RGBW. Since the transmittance of the W sub-pixel is much higher than the transmittance of the RGB sub-pixel, the same brightness requirement is required. The display power consumption can be greatly reduced.
  • the white light AMOLED display of the RGBW display mode requires conversion of RGB source data input from the outside into RGBW data.
  • white light is used to replace a certain amount of light emitted by RGB, thereby achieving the purpose of low power consumption and high brightness.
  • the WOLED displays white light by a combination of emission layers of a plurality of colors the color thereof changes depending on the driving voltage of the material used, which causes the white light emitted by the WOLED to be not a standard pure white light, and the color of the WOLED is also It will change with the brightness.
  • the RGB data is converted to RGBW data, the image will be affected by the color cast of the WOLED and the image quality will be degraded.
  • the present disclosure provides an OLED display device, a display control method thereof, and a display control device, such that after the RGB data is converted into RGBW data, the image displayed by the white light OLED display device is not affected by the color cast of the WOLED.
  • the present disclosure provides a display control method for a white light OLED display device, including:
  • the red, green, blue, and white color data output values are determined according to the brightness value of the white organic light emitting diode, the gain value of the sub-pixel participating in the color cast compensation, and the white data.
  • the determining, according to the white data, the chromaticity coordinates of the white organic light emitting diode comprises:
  • chromaticity coordinate table acquiring chromaticity coordinates of the white organic light emitting diode corresponding to the white data, wherein the chromaticity coordinate table records different white data and a white organic light emitting diode corresponding thereto Chromaticity coordinates and chromaticity coordinates of red, green, and blue sub-pixels.
  • the step of acquiring the luminance value of the white organic light emitting diode and the gain value of the subpixel participating in the color cast compensation required to obtain the chromaticity coordinate of the white organic light emitting diode to compensate the target value comprises:
  • the predetermined color mixing formula is:
  • L_WOLED (Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox
  • O(Ox, Oy, Oz) is the chromaticity coordinate of the white organic light-emitting diode corresponding to the white data
  • A(Ax, Ay, Az) and C(Cx, Cy, Cz) are two sub-pixels participating in the compensation.
  • the chromaticity coordinates, (Wx, Wy, Wz) are the chromaticity coordinates of the target value
  • the brightness values of the white organic light-emitting diodes of L_WOLED, LA, LC are the gain values of the two sub-pixels participating in the compensation.
  • the step of determining the red, green, blue, and white color data output values according to the brightness value of the white light organic light emitting diode, the gain value of the sub-pixel participating in the color cast compensation, and the white data includes:
  • the product of the gain value of the sub-pixel participating in the color cast compensation and the white data is obtained, and the difference between the initial luminance value of the sub-pixel participating in the compensation and the corresponding product is calculated, and the compensation is obtained.
  • a final luminance value of the sub-pixel for a sub-pixel that is not involved in the compensation, calculating a difference between the initial luminance value and the white data to obtain a final luminance value of the sub-pixel that is not involved in the compensation, wherein the initial luminance value of the sub-pixel Obtained according to the red, green, and blue color data;
  • the red, green, blue, and white color data output values are determined according to the final brightness value of the sub-pixels participating in the compensation, the final brightness value of the sub-pixels not participating in the compensation, and the brightness values of the white organic light-emitting diodes.
  • the final brightness value of the sub-pixel is calculated using the following formula:
  • R', G', B', and W' are the final luminance values of the red, green, blue, and white sub-pixels, respectively
  • R, G, and B are the initial luminance values obtained from the red, green, and blue source data, respectively.
  • R_gain, G_gain, and B_gain are respectively red, green, and blue color gain values, wherein the gain value of the sub-pixel that is not involved in the compensation is 1, W is the white data, and L_WOLED is the brightness value of the white organic light-emitting diode. .
  • the determining the white number according to the minimum value of the red, green, and blue color data includes:
  • the white light mixing ratio being a ratio of a minimum value of the red, green, and blue color data to be replaced by the white data and the white data;
  • the step of determining white data according to the minimum value of the red, green, and blue color data includes:
  • the sub-pixel corresponding to the minimum value among the red, green, and blue three-color source data is a sub-pixel participating in the color cast compensation, increasing the value of the currently stored white light mixing ratio
  • the sub-pixel corresponding to the minimum value among the red, green, and blue three-color source data is not a sub-pixel participating in the color cast compensation, the value of the currently stored white light mixing ratio is reduced.
  • the step of increasing the value of the currently stored white light mixing rate includes:
  • the sub-pixel corresponding to the minimum value of the red, green, and blue color data is a sub-pixel participating in the color cast compensation, determining the currently stored according to the statistical gain value of the sub-pixel participating in the color shift compensation The added value of the white light mixing ratio.
  • the display control method further includes:
  • the value of the currently stored white light mixing ratio is adjusted according to the statistical red, green, blue, and white color data output values.
  • the step of adjusting the value of the currently stored white light mixing rate according to the statistical red, green, blue, and white color data output values includes:
  • the target value is a chromaticity coordinate of a pure white light color required by the white light organic light emitting diode display device.
  • the present disclosure also provides a display control device for a white light organic light emitting diode display device, including:
  • a receiving module configured to receive three-color source data of red, green, and blue
  • a minimum value determining module configured to determine a minimum value of the red, green, and blue color data
  • a white data determining module configured to determine white data according to a minimum value of the red, green, and blue color data
  • a chromaticity coordinate determining module configured to determine a chromaticity coordinate of the white light organic light emitting diode according to the white data
  • a gain value determining module configured to acquire a brightness value of the white organic light emitting diode and a gain value of a sub-pixel participating in the color cast compensation required to compensate the chromaticity coordinate of the white light organic light emitting diode to a target value;
  • the algorithm conversion module is configured to determine, according to the brightness value of the white organic light emitting diode, the gain value of the sub-pixel participating in the color cast compensation, and the white data, the data output values of the four colors of red, green, blue, and white.
  • the chromaticity coordinate determining module is configured to query a chromaticity coordinate table according to the white data, and acquire chromaticity coordinates of the white organic light emitting diode corresponding to the white data, where the chromaticity coordinate table records There are different white data and the chromaticity coordinates of the white organic light-emitting diodes corresponding thereto and the chromaticity coordinates of the red, green and blue sub-pixels.
  • the gain value determining module is specifically configured to acquire chromaticity coordinates of the white organic light emitting diode corresponding to the white data stored in the chromaticity coordinate table and chromaticity coordinates of the sub-pixels participating in the color cast compensation; Calculating, according to the chromaticity coordinates of the white organic light emitting diode corresponding to the white data and the chromaticity coordinates of the sub-pixels participating in the color cast compensation, using a predetermined color mixing formula to calculate the chromaticity coordinates of the white organic light emitting diode to be compensated to the target value
  • the brightness value of the white organic light emitting diode and the gain value of the sub-pixel participating in the color cast compensation are required.
  • the predetermined color mixing formula is:
  • L_WOLED (Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox
  • O(Ox, Oy, Oz) is the chromaticity coordinate of the white organic light-emitting diode corresponding to the white data
  • A(Ax, Ay, Az) and C(Cx, Cy, Cz) are two sub-pixels participating in the compensation.
  • the chromaticity coordinates, (Wx, Wy, Wz) are the chromaticity coordinates of the target value
  • the brightness values of the white organic light-emitting diodes of L_WOLED, LA, LC are the gain values of the two sub-pixels participating in the compensation.
  • the algorithm conversion module is specifically configured to acquire a product of a gain value of the sub-pixel participating in the color cast compensation and the white data for the sub-pixel participating in the compensation, and calculate an initial brightness value of the sub-pixel participating in the compensation.
  • the final brightness value of the sub-pixel participating in the compensation is obtained; for the sub-pixel not participating in the compensation, the difference between the initial brightness value and the white data is calculated, and the sub-pixel not participating in the compensation is obtained.
  • the initial brightness value of the sub-pixel is obtained according to the red, green, and blue color data; the final brightness value of the sub-pixel participating in the compensation, the final brightness value of the sub-pixel not participating in the compensation, and the white light organic
  • the brightness value of the LED determines the data output values of the four colors of red, green, blue and white.
  • the algorithm conversion module calculates a final brightness value of the sub-pixel by using the following formula:
  • R', G', B', and W' are the final luminance values of the red, green, blue, and white sub-pixels, respectively
  • R, G, and B are the initial luminance values obtained from the red, green, and blue source data, respectively.
  • R_gain, G_gain, and B_gain are respectively red, green, and blue color gain values, wherein the gain value of the sub-pixel that is not involved in the compensation is 1, W is the white data, and L_WOLED is the brightness value of the white organic light-emitting diode. .
  • the display control device further includes:
  • a storage module configured to store a white light mixing ratio, the white light mixing ratio being a ratio of a minimum value of the red, green, and blue color data to be replaced by the white data and the white data;
  • the white data determining module is specifically configured to obtain a white light mixing ratio stored by the storage module, and calculate a product of a minimum value of the red, green, and blue color data and the white light mixing rate to obtain the white color. data.
  • the display control device further includes:
  • a determining module configured to determine whether a sub-pixel corresponding to a minimum value among the red, green, and blue color data is a sub-pixel participating in color cast compensation
  • a first adjustment module configured to increase a value of the white light mixing ratio when a sub-pixel corresponding to a minimum value of the red, green, and blue color data is a sub-pixel participating in color cast compensation
  • a second adjusting module configured to reduce a value of the currently stored white light mixing ratio when the sub-pixel corresponding to the minimum value among the red, green, and blue three-color source data is not a sub-pixel participating in the color cast compensation.
  • the display control device further includes:
  • a first statistic module configured to perform statistics on the gain values of the sub-pixels participating in the color-shift compensation
  • the first adjustment module is further configured to: when the sub-pixel corresponding to the minimum value of the red, green, and blue color data is a sub-pixel participating in the color cast compensation, according to the statistical participation of the color shift compensation The gain value of the sub-pixel determines the added value of the currently stored white light mixing ratio.
  • the display control device further includes:
  • a second statistical module configured to count data output values of red, green, blue, and white colors
  • the third adjustment module is configured to adjust the value of the currently stored white light mixing rate according to the statistical red, green, blue, and white color data output values.
  • the third adjustment module is specifically configured to compare an average value of the red, green, and blue color data output values with an average value of the white data output values; and output the red, green, and blue color data.
  • the average value of the value is greater than the average value of the output values of the white data, increasing the white light mixing ratio; when the average value of the red, green, and blue color data output values is smaller than the output value of the white data At the average value, the white light mixing ratio is decreased.
  • the target value is a chromaticity coordinate of a pure white light color required by the white light organic light emitting diode display device.
  • the present disclosure also provides a white light organic light emitting diode display device including the above display control device.
  • FIG. 1 is a schematic structural diagram of a white light OLED display device according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flow chart of a display control method of a white light OLED display device according to an embodiment of the present disclosure
  • FIG. 3 is a diagram showing an example of an algorithm for converting RGB to RGBW when the chromaticity of the WOLED is not compensated in the prior art
  • FIG. 4 is a diagram showing an example of an algorithm for converting RGB to RGBW when the chromaticity of the WOLED is compensated in the embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a display control device of a white light OLED display device according to an embodiment of the present disclosure.
  • a white light OLED display device of an embodiment of the present disclosure includes a plurality of pixels, each pixel including an R sub-pixel for generating red light, a G sub-pixel for generating green light, a B sub-pixel for generating blue light, and A white sub-pixel that produces white light.
  • Each of the sub-pixels includes a white organic light emitting diode (WOLED) that displays white by a combination of emission layers of a plurality of colors. As shown in FIG.
  • WOLED white organic light emitting diode
  • the R sub-pixel includes a red color filter RCF for transmitting red light in white light incident from the WOLED
  • the G sub-pixel includes a green color filter GCF, the green color filter
  • the GCF is for transmitting green light in white light incident from the WOLED
  • the B sub-pixel includes a blue color filter BCF for transmitting blue light in white light incident from the WOLED.
  • the W sub-pixel does not have a color filter, and transmits all white light incident from the WOLED to compensate for the color filter. Reduction in image brightness caused by RCF, GCF, and BCF.
  • WOLED displays white light through a combination of emission layers of multiple colors, its color changes depending on the driving voltage of the material used, which causes the white light emitted by the WOLED to be not a standard pure white light, at this time, in R, G.
  • a standard pure white light is used instead of a certain degree of light emitted by R, G, and B sub-pixels, a color cast image is generated.
  • an embodiment of the present disclosure provides a display control method for a white light OLED display device, where the method includes the following steps:
  • Step S11 receiving red, green, and blue (R, G, B) three-color source data, and determining a minimum value among the red, green, and blue three-color source data;
  • Step S12 determining white data according to a minimum value among the red, green, and blue color data
  • the white data is the brightness value.
  • Step S13 determining chromaticity coordinates of the white organic light emitting diode (WOLED) according to the white data;
  • Step S14 acquiring a luminance value of the white organic light emitting diode and a gain value of a sub-pixel participating in the color cast compensation required to compensate the chromaticity coordinates of the white light organic light emitting diode to a target value;
  • Step S15 determining four colors of red, green, blue, and white (R, G, B, W) according to the brightness value of the white organic light emitting diode, the gain value of the sub-pixel participating in the color cast compensation, and the white data. output value.
  • the light color of the WOLED is compensated, and the light color of the WOLED is returned to the pure white light.
  • the image is not affected by the WOLED color cast color, and the display quality of the white light OLED display device is improved.
  • the received red, green, and blue color data may be a luminance value or a grayscale value.
  • the received red, green, and blue source data are grayscale values
  • the The minimum value in the red, green, and blue source data is converted into a luminance value.
  • the gray scale-luminance conversion can be performed by the following formula:
  • Gray is a grayscale value
  • L is a luminance value
  • ⁇ is a gamma value, generally 2.2
  • GL is a grayscale total.
  • the minimum value of the red, green, and blue color data may be directly used as white data, that is, the white light completely replaces the light emitted by the sub-pixel corresponding to the minimum value, of course,
  • the step of using the white light portion to replace the light emitted by the sub-pixel corresponding to the minimum value, that is, the step of determining the white data according to the minimum value of the red, green, and blue color data may include:
  • Step S121 Acquire a currently stored white light mixing ratio, where the white light mixing ratio is a ratio of a minimum value among the red, green, and blue three-color source data to be replaced by the white data and the white data;
  • Step S122 Calculate a product of a minimum value of the red, green, and blue three-color source data and the white light mixing ratio to obtain the white data.
  • the calculation formula of the white light data output value may be:
  • W white data
  • WMR white-mixing ratio
  • min(R, G, B) is the minimum value among red, green, and blue source data.
  • the chromaticity coordinates of the WOLED may be determined by querying a chromaticity coordinate table, and the chromaticity coordinate table records different white data obtained from a plurality of experimental measurements and chromaticity coordinates of the WOLED corresponding thereto.
  • the chromaticity coordinates of the red, green, and blue sub-pixels, and the contents of the chromaticity coordinate table can be referred to the following table.
  • the chromaticity coordinate table may also record the pure white chromaticity coordinates required for the display device, that is, the target value.
  • the chromaticity coordinate table is queried to obtain the chromaticity coordinates (O2x, O2y, O2z) of the corresponding WOLED.
  • step S14 for a display device, when the chromaticity coordinates of the white organic light emitting diode are known, the chromaticity coordinates of the white organic light emitting diode can be obtained according to the chromaticity coordinate to be compensated to the target value.
  • the sub-pixels participating in the color cast compensation are two sub-pixels of three sub-pixels of red, green and blue, which are determined according to the characteristics of the white organic light-emitting diode.
  • the target value is the chromaticity coordinate of the pure white color required by the white OLED display device, for example, (0.33, 0.33, 0.34).
  • the step of acquiring the luminance value of the white organic light emitting diode and the gain value of the subpixel participating in the color cast compensation required to obtain the chromaticity coordinates of the white organic light emitting diode to compensate the target value may include:
  • the predetermined color mixing formula may be:
  • L_WOLED (Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox
  • O(Ox, Oy, Oz) is the chromaticity coordinate of the white organic light-emitting diode corresponding to the white data
  • A(Ax, Ay, Az) and C(Cx, Cy, Cz) are two sub-pixels participating in the compensation.
  • the chromaticity coordinates, (Wx, Wy, Wz) are the chromaticity coordinates of the target value
  • the brightness values of the white organic light-emitting diodes of L_WOLED, LA, LC are the gain values of the two sub-pixels participating in the compensation.
  • step S15 the steps of determining the red, green, blue, and white color data output values by the following method include:
  • the product of the gain value of the sub-pixel participating in the color cast compensation and the white data is obtained, and the difference between the initial luminance value of the sub-pixel participating in the compensation and the corresponding product is calculated, and the compensation is obtained.
  • a difference between the initial luminance value and the white data is calculated to obtain a final luminance value of the sub-pixel that is not involved in the compensation, wherein the initial luminance value of the sub-pixel is according to the red, green, and blue Three-color source data is obtained;
  • the red, green, blue, and white color data output values are determined according to the final brightness value of the sub-pixels participating in the compensation, the final brightness value of the sub-pixels not participating in the compensation, and the brightness values of the white organic light-emitting diodes.
  • the initial luminance values of the red, green, and blue sub-pixels are directly source data, if the received red, green, and blue colors If the source data is gray scale data, the gray scale data needs to be converted into luminance data to obtain initial luminance values of the red, green, and blue sub-pixels.
  • the final brightness value of the sub-pixel can be calculated by the following formula:
  • R', G', B', and W' are the final luminance values of the red, green, blue, and white sub-pixels, respectively
  • R, G, and B are the initial luminance values obtained from the red, green, and blue source data, respectively.
  • R_gain, G_gain, and B_gain are respectively red, green, and blue color gain values, wherein the gain value of the sub-pixel that is not involved in the compensation is 1, W is the white data, and L_WOLED is the brightness value of the white organic light-emitting diode. .
  • FIG. 3 is an exemplary diagram of an algorithm for converting RGB to RGBW when the chromaticity of the WOLED is not compensated in the prior art
  • FIG. 4 is performed on the chromaticity of the WOLED in the embodiment of the present disclosure.
  • the R, G, and B data shown in FIG. 4 is taken as an example.
  • the R, G, and B three color sources are first obtained.
  • the minimum brightness value of the data that is, the B color data
  • the minimum value is taken as white data (W)
  • the chromaticity coordinate table is queried according to the white data to determine the chromaticity coordinates of the WOLED, and then according to the WOLED
  • the chromaticity coordinates determine the luminance value of the WOLED and the luminance gain value of the sub-pixels participating in the color cast compensation (for example, the sub-pixels participating in the color cast compensation in this embodiment are R and G sub-pixels), and finally according to the brightness of the WOLED
  • the value, the white data, and the luminance gain value of the sub-pixels participating in the color cast compensation obtain the R, G, B, and W color data output values.
  • the obtained luminance output values of R, G, B, and W need to be converted into gray scale values.
  • the sub-pixels participating in the color cast compensation are frequently illuminated due to the color cast compensation, which may result in a decrease in the lifetime of the sub-pixels participating in the color cast compensation.
  • WMR white light mixing ratio
  • the step of determining white data according to the minimum value of the red, green, and blue color data includes:
  • the sub-pixel corresponding to the minimum value among the red, green, and blue three-color source data is a sub-pixel participating in the color cast compensation, the value of the currently stored white light mixing ratio is increased.
  • the sub-pixel corresponding to the minimum value among the red, green, and blue three-color source data is not a sub-pixel participating in the color cast compensation, the value of the currently stored white light mixing ratio is reduced.
  • the red sub-pixel and the blue sub-pixel are sub-pixels participating in color cast compensation
  • the minimum value min(R, G, B) in the red, green, and blue three-color source data is red or blue data.
  • the luminance of the red sub-pixel or the blue sub-pixel can be reduced by increasing the value of the white light mixing ratio (WMR).
  • WMR white light mixing ratio
  • the gain value of the sub-pixels participating in the color-shift compensation may also be counted.
  • the gain value determines the value of the currently stored white light mixing rate that needs to be increased.
  • the red sub-pixel and the blue sub-pixel are sub-pixels participating in the color cast compensation, and the gain value of the obtained red sub-pixel (the average value of the plurality of gain values can be calculated) is large, and the blue sub-pixel is When the gain value is small, when the sub-pixel corresponding to the minimum value among the red, green and blue source data is a red sub-pixel, the value of the white light mixing ratio is increased by a first value when the red and green colors are When the sub-pixel corresponding to the minimum value of the blue tri-color source data is a blue sub-pixel, the value of the white light mixing ratio is increased by a second value, wherein the first value is greater than the second value.
  • the white light mixing ratio is adjusted according to the output value of the statistical four color data.
  • the average value of the data output values of the red, green, and blue colors and the average value of the white data output values may be compared, when the average value of the red, green, and blue color data output values is greater than the white color.
  • the white light mixing ratio is increased; when the average value of the red, green, and blue color data output values is smaller than the average value of the output values of the white data, the reduction is performed.
  • the white light mixing ratio is described.
  • the received gamma curve may be used to receive the red color.
  • the green and blue three-color data are subjected to gamma conversion, that is, the red, green, and blue color data participating in the operation in the above embodiment are gamma-transformed data.
  • an embodiment of the present disclosure further provides a display control apparatus for a white light OLED display device, including:
  • a receiving module configured to receive three-color source data of red, green, and blue
  • a minimum value determining module configured to determine a minimum value of the red, green, and blue color data
  • a white data determining module configured to determine white data according to a minimum value of the red, green, and blue color data
  • a chromaticity coordinate determining module configured to determine a chromaticity coordinate of the white light organic light emitting diode according to the white data
  • a gain value determining module configured to acquire a brightness value of the white organic light emitting diode and a gain value of a sub-pixel participating in the color cast compensation required to compensate the chromaticity coordinate of the white light organic light emitting diode to a target value;
  • An algorithm conversion module configured to participate in color cast according to a brightness value of the white organic light emitting diode
  • the gain values of the compensated sub-pixels and the white data determine the four-color data output values of red, green, blue, and white.
  • the light color of the WOLED is compensated, and the light color of the WOLED is returned to the pure white light.
  • the image is not affected by the WOLED color cast color, and the display quality of the white light OLED display device is improved.
  • the red, green, and blue color data received by the receiving module may be a brightness value or a gray level value.
  • the received red, green, and blue color data are grayscale values
  • the The minimum value in the red, green, and blue source data is converted to a luminance value.
  • the gray scale-luminance conversion can be performed by the following formula:
  • Gray is a grayscale value
  • L is a luminance value
  • ⁇ is a gamma value, generally 2.2
  • GL is a grayscale total.
  • the white data determining module may directly use the minimum value of the red, green, and blue color data as white data, that is, completely replace the light emitted by the sub-pixel corresponding to the minimum value by using white light, of course, The light emitted by the sub-pixel corresponding to the minimum value is replaced by the white light portion as needed, that is, the organic light emitting diode display device may further include:
  • a storage module configured to store a white light mixing ratio, the white light mixing ratio being a ratio of a minimum value of the red, green, and blue color data to be replaced by the white data and the white data;
  • the white data determining module is specifically configured to obtain a white light mixing ratio stored by the storage module, and calculate a product of a minimum value of the red, green, and blue color data and the white light mixing rate to obtain the white color. data.
  • the calculation formula of the white light data output value may be:
  • W white data
  • WMR white-mixing ratio
  • min(R, G, B) is the minimum value among red, green, and blue source data.
  • the chromaticity coordinate determining module may determine a chromaticity coordinate of the WOLED by querying a chromaticity coordinate table, where the chromaticity coordinate table records different white data obtained from multiple experimental measurements and chromaticity coordinates of the corresponding WOLED And the chromaticity coordinates of the red, green, and blue sub-pixels.
  • the white organic light emitting diode required for the chromaticity coordinate of the white organic light emitting diode to be compensated to the target value can be obtained according to the chromaticity coordinate.
  • the sub-pixels participating in the color cast compensation are two sub-pixels of three sub-pixels of red, green and blue, which are determined according to the characteristics of the white organic light-emitting diode.
  • the target value is the chromaticity coordinate of the pure white color required by the white OLED display device, for example, (0.33, 0.33, 0.33).
  • the gain value determining module is specifically configured to acquire chromaticity coordinates of the white organic light emitting diode corresponding to the white data stored in the chromaticity coordinate table and chromaticity coordinates of the sub-pixels participating in the color cast compensation; Calculating, according to the chromaticity coordinates of the white organic light emitting diode corresponding to the white data and the chromaticity coordinates of the sub-pixels participating in the color cast compensation, using a predetermined color mixing formula to calculate the chromaticity coordinates of the white organic light emitting diode to be compensated to the target value
  • the brightness value of the white organic light emitting diode and the gain value of the sub-pixel participating in the color cast compensation are required.
  • the predetermined color mixing formula may be:
  • L_WOLED (Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox
  • O(Ox, Oy, Oz) is the chromaticity coordinate of the white organic light-emitting diode corresponding to the white data
  • A(Ax, Ay, Az) and C(Cx, Cy, Cz) are two sub-pixels participating in the compensation.
  • the chromaticity coordinates, (Wx, Wy, Wz) are the chromaticity coordinates of the target value
  • the brightness values of the white organic light-emitting diodes of L_WOLED, LA, LC are the gain values of the two sub-pixels participating in the compensation.
  • the algorithm conversion module is specifically configured to acquire a product of a gain value of the sub-pixel participating in the color cast compensation and the white data for the sub-pixel participating in the compensation, and calculate an initial brightness value of the sub-pixel participating in the compensation.
  • the final brightness value of the sub-pixel participating in the compensation is obtained; for the sub-pixel not participating in the compensation, the difference between the initial brightness value and the white data is calculated, and the sub-pixel not participating in the compensation is obtained.
  • the initial brightness value of the sub-pixel is obtained according to the red, green, and blue color data; the final brightness value of the sub-pixel participating in the compensation, the final brightness value of the sub-pixel not participating in the compensation, and the white light organic
  • the brightness value of the LED determine red, Green, blue, white four color data output value.
  • the algorithm conversion module calculates the final brightness value of the sub-pixel by using the following formula:
  • R', G', B', and W' are the final luminance values of the red, green, blue, and white sub-pixels, respectively
  • R, G, and B are the initial luminance values obtained from the red, green, and blue source data, respectively.
  • R_gain, G_gain, and B_gain are respectively red, green, and blue color gain values, wherein the gain value of the sub-pixel that is not involved in the compensation is 1, W is the white data, and L_WOLED is the brightness value of the white organic light-emitting diode. .
  • the obtained luminance output values of R, G, B, and W need to be converted into gray scale values.
  • the sub-pixels participating in the color cast compensation are frequently illuminated due to the color cast compensation, which may result in a decrease in the lifetime of the sub-pixels participating in the color cast compensation.
  • WMR white light mixing ratio
  • the white light organic light emitting diode display device may further include:
  • a determining module configured to determine whether a sub-pixel corresponding to a minimum value among the red, green, and blue color data is a sub-pixel participating in color cast compensation
  • a first adjustment module configured to increase a value of the white light mixing ratio when a sub-pixel corresponding to a minimum value of the red, green, and blue color data is a sub-pixel participating in color cast compensation
  • a second adjusting module configured to reduce a value of the currently stored white light mixing ratio when the sub-pixel corresponding to the minimum value among the red, green, and blue three-color source data is not a sub-pixel participating in the color cast compensation.
  • the gain value of the sub-pixels participating in the color-shift compensation may also be counted.
  • the gain value determines the value of the currently stored white light mixing rate that needs to be increased.
  • the white light organic light emitting diode display device may further include:
  • a first statistic module configured to perform statistics on the gain values of the sub-pixels participating in the color-shift compensation
  • the first adjustment module is further configured to: when the sub-pixel corresponding to the minimum value of the red, green, and blue color data is a sub-pixel participating in the color cast compensation, according to the statistical participation compensation
  • the gain value of the sub-pixel determines the added value of the currently stored white light mixing ratio.
  • the white light mixing ratio is adjusted according to the output value of the statistical four color data.
  • the average value of the data output values of the red, green, and blue colors and the average value of the white data output values may be compared, when the average value of the red, green, and blue color data output values is greater than the white color.
  • the white light mixing ratio is increased; when the average value of the red, green, and blue color data output values is smaller than the average value of the output values of the white data, the reduction is performed.
  • the white light mixing ratio is described.
  • the white light organic light emitting diode display device may further include:
  • a second statistical module configured to count data output values of red, green, blue, and white colors
  • the third adjustment module is configured to adjust the value of the currently stored white light mixing rate according to the statistical red, green, blue, and white color data output values.
  • the third adjustment module is specifically configured to compare an average value of the red, green, and blue color data output values with an average value of the white data output values; and an average value of the red, green, and blue color data output values. When the average value of the output values of the white data is greater than, the white light mixing ratio is increased; when the average value of the red, green, and blue color data output values is smaller than the average value of the output values of the white data, The white light mixing ratio is reduced.

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Abstract

一种白光有机发光二极管（OLED）显示装置及其显示控制方法、显示控制装置，该方法包括：接收红、绿、蓝三色源数据，并确定红、绿、蓝三色源数据中的最小值（S11）；根据最小值，确定白色数据（S12）；根据白色数据，确定白光有机发光二极管（WOLED）的色度坐标（S13）；获取WOLED的色度坐标要补偿至目标值时所需的WOLED亮度值及参与偏色补偿的子像素的增益值（S14）；根据WOLED亮度值、参与偏色补偿的子像素的增益值和白色数据，确定红、绿、蓝、白四色数据输出值（S15）。

Description

白光OLED显示装置及其显示控制方法、显示控制装置
相关申请的交叉引用
本申请主张在2014年10月24日在中国提交的中国专利申请号No.201410575290.2的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及有机发光二极管(Organic Light Emitting Diode，OLED)显示技术领域，尤其涉及一种白光OLED显示装置及其显示控制方法、显示装置。
背景技术
有源矩阵有机发光二极管面板(Active Matrix Organic Light Emitting Diode，AMOLED)相比传统的液晶面板，具有反应速度较快、对比度更高以及视角更广等特点。传统的白光AMOLED面板是由白光OLED(WOLED)加上RGB三种颜色的彩色滤色器(color filter，CF)实现的。然而这种面板结构中，RGB三种颜色的彩色滤色器的透过率比较低，WOLED发射的白光的大部分能量都被彩色滤色器吸收，为保证显示亮度，需增大通过WOLED的电流，导致显示面板功耗增加，WOLED的寿命也变短。RGBW显示模式的白光AMOLED面板是由WOLED加上RGBW四种颜色的滤色器组成的，由于W子像素的透过率远远高于RGB子像素的透过率，因此，在相同的亮度要求下，可大幅度的降低显示功耗。
RGBW显示模式的白光AMOLED显示器需要将从外部输入的RGB源数据转换成RGBW数据。传统的转换方法中，是利用白光取代一定程度的RGB所发的光，从而达成低功耗高亮度的目的。然而，由于WOLED是通过多种颜色的发射层的组合来显示白光的，其颜色根据所使用的材料的驱动电压而改变，这导致WOLED发射的白光不是标准的纯白光，且WOLED的光色也会随其亮度的不同而改变，此时，在RGB数据转换为RGBW数据后，图像会受WOLED的偏色影响而降低画质。
发明内容
有鉴于此，本公开提供一种OLED显示装置及其显示控制方法、显示控制装置，使得在RGB数据转换为RGBW数据之后，白光OLED显示装置显示的图像不受WOLED的偏色影响。
为解决上述技术问题，本公开提供一种白光OLED显示装置的显示控制方法，包括：
接收红、绿、蓝三色源数据，并确定所述红、绿、蓝三色源数据中的最小值；
根据所述红、绿、蓝三色源数据中的最小值，确定白色数据；
根据所述白色数据，确定白光有机发光二极管的色度坐标；
获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值；
根据所述白光有机发光二极管的亮度值、参与偏色补偿的子像素的增益值和所述白色数据，确定红、绿、蓝、白四色数据输出值。
可选地，所述根据所述白色数据，确定白光有机发光二极管的色度坐标的步骤包括：
根据所述白色数据，查询色度坐标表，获取所述白色数据对应的白光有机发光二极管的色度坐标，所述色度坐标表中记录有不同的白色数据和与其对应的白光有机发光二极管的色度坐标及红、绿、蓝色子像素的色度坐标。
可选地，所述获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值的步骤包括：
获取所述色度坐标表中存储的所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标；
根据所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标，采用预定混色公式计算所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值。
可选地，所述预定混色公式为：
L_WOLED＝(Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox
-Ax)/(Cx-Ax)-(Oz-Az)]LC
＝(Cy/Wy)(Wx-Ax)/(Cx-Ax)-(L_WOLED/Oy)(Ox
-Ax)/(Cx-Ax)
LA＝1-L_WOLED-LC
其中，O(Ox，Oy，Oz)为所述白色数据对应的白光有机发光二极管的色度坐标，A(Ax，Ay，Az)和C(Cx，Cy，Cz)为参与补偿的两个子像素的色度坐标，(Wx，Wy，Wz)为所述目标值的色度坐标，L_WOLED所述白光有机发光二极管的亮度值，LA、LC为参与补偿的两个子像素的增益值。
可选地，所述根据所述白光有机发光二极管的亮度值、参与偏色补偿的子像素的增益值和所述白色数据，确定红、绿、蓝、白四色数据输出值的步骤包括：
对于参与补偿的子像素，获取参与偏色补偿的子像素的增益值与所述白色数据的乘积，并计算参与补偿的子像素的初始亮度值与对应的所述乘积的差值，得到参与补偿的子像素的最终亮度值；对于未参与补偿的子像素，计算其初始亮度值与所述白色数据的差值，得到未参与补偿的子像素的最终亮度值，其中，子像素的初始亮度值根据所述红、绿、蓝三色源数据得到；
根据参与补偿的子像素的最终亮度值、未参与补偿的子像素的最终亮度值以及白光有机发光二极管的亮度值，确定红、绿、蓝、白四色数据输出值。
可选地，采用下述公式计算子像素的最终亮度值：
R’＝R-R_gain×W
G’＝G-G_gain×W
B’＝B-B_gain×W
W’＝L_WOLED
其中，R’、G’、B’、W’分别为红、绿、蓝、白子像素的最终亮度值，R、G、B分别为根据红、绿、蓝三色源数据得到的初始亮度值，R_gain、G_gain、B_gain分别为红、绿、蓝三色增益值，其中，未参与补偿的子像素的增益值为1，W为所述白色数据，L_WOLED为所述白光有机发光二极管的亮度值。
可选地，所述根据所述红、绿、蓝三色源数据中的最小值，确定白色数 据的步骤包括：
获取当前存储的白光混合率，所述白光混合率为白色数据与白色数据所要取代的所述红、绿、蓝三色源数据中的最小值的比率；
计算所述红、绿、蓝三色源数据中的最小值与所述白光混合率的乘积，得到所述白色数据。
可选地，所述根据所述红、绿、蓝三色源数据中的最小值，确定白色数据的步骤之前还包括：
判断所述红、绿、蓝三色源数据中的最小值对应的子像素是否为参与偏色补偿的子像素；
当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，增大当前存储的白光混合率的值；
当所述红、绿、蓝三色源数据中的最小值对应的子像素不是参与偏色补偿的子像素时，减小当前存储的白光混合率的值。
可选地，所述增大当前存储的白光混合率的值的步骤包括：
对所述参与色偏补偿的子像素的增益值进行统计；
当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，根据统计的所述参与色偏补偿的子像素的增益值，确定当前存储的白光混合率的增加值。
可选地，所述显示控制方法还包括：
统计红、绿、蓝、白四色数据输出值；
根据统计的红、绿、蓝、白四色数据输出值，调整当前存储的白光混合率的值。
可选地，所述根据统计的红、绿、蓝、白四色数据输出值，调整当前存储的白光混合率的值的步骤包括：
比较所述红、绿、蓝三色数据输出值的平均值与白色数据输出值的平均值；
当所述红、绿、蓝三色数据输出值的平均值大于所述白色数据的输出值的平均值时，增大所述白光混合率；
当所述红、绿、蓝三色数据输出值的平均值小于所述白色数据的输出值 的平均值时，减小所述白光混合率。
可选地，所述目标值是所述白光有机发光二极管显示装置所需的纯白光色的色度坐标。
本公开还提供一种白光有机发光二极管显示装置的显示控制装置，包括：
接收模块，用于接收红、绿、蓝三色源数据；
最小值确定模块，用于确定所述红、绿、蓝三色源数据中的最小值；
白色数据确定模块，用于根据所述红、绿、蓝三色源数据中的最小值，确定白色数据；
色度坐标确定模块，用于根据所述白色数据，确定白光有机发光二极管的色度坐标；
增益值确定模块，用于获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值及参与偏色补偿的子像素的增益值；
算法转换模块，用于根据所述白光有机发光二极管的亮度值、参与偏色补偿的子像素的增益值和所述白色数据，确定红、绿、蓝、白四色数据输出值。
可选地，所述色度坐标确定模块具体用于根据所述白色数据，查询色度坐标表，获取所述白色数据对应的白光有机发光二极管的色度坐标，所述色度坐标表中记录有不同的白色数据和与其对应的白光有机发光二极管的色度坐标及红、绿、蓝色子像素的色度坐标。
可选地，所述增益值确定模块具体用于获取所述色度坐标表中存储的所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标；根据所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标，采用预定混色公式计算所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值。
可选地，所述预定混色公式为：
L_WOLED＝(Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox
-Ax)/(Cx-Ax)-(Oz-Az)]LC
＝(Cy/Wy)(Wx-Ax)/(Cx-Ax)-(L_WOLED/Oy)(Ox
-Ax)/(Cx-Ax)
LA＝1-L_WOLED-LC
其中，O(Ox，Oy，Oz)为所述白色数据对应的白光有机发光二极管的色度坐标，A(Ax，Ay，Az)和C(Cx，Cy，Cz)为参与补偿的两个子像素的色度坐标，(Wx，Wy，Wz)为所述目标值的色度坐标，L_WOLED所述白光有机发光二极管的亮度值，LA、LC为参与补偿的两个子像素的增益值。
可选地，所述算法转换模块具体用于对于参与补偿的子像素，获取参与偏色补偿的子像素的增益值与所述白色数据的乘积，并计算参与补偿的子像素的初始亮度值与对应的所述乘积的差值，得到参与补偿的子像素的最终亮度值；对于未参与补偿的子像素，计算其初始亮度值与所述白色数据的差值，得到未参与补偿的子像素的最终亮度值，其中，子像素的初始亮度值根据所述红、绿、蓝三色源数据得到；根据参与补偿的子像素的最终亮度值、未参与补偿的子像素的最终亮度值以及白光有机发光二极管的亮度值，确定红、绿、蓝、白四色数据输出值。
可选地，所述算法转换模块采用下述公式计算子像素的最终亮度值：
R’＝R-R_gain×W
G’＝G-G_gain×W
B’＝B-B_gain×W
W’＝L_WOLED
其中，R’、G’、B’、W’分别为红、绿、蓝、白子像素的最终亮度值，R、G、B分别为根据红、绿、蓝三色源数据得到的初始亮度值，R_gain、G_gain、B_gain分别为红、绿、蓝三色增益值，其中，未参与补偿的子像素的增益值为1，W为所述白色数据，L_WOLED为所述白光有机发光二极管的亮度值。
可选地，所述显示控制装置还包括：
存储模块，用于存储白光混合率，所述白光混合率为白色数据与白色数据所要取代的所述红、绿、蓝三色源数据中的最小值的比率；
所述白色数据确定模块具体用于获取所述存储模块存储的白光混合率，并计算所述红、绿、蓝三色源数据中的最小值与所述白光混合率的乘积，得到所述白色数据。
可选地，所述显示控制装置还包括：
判断模块，用于判断所述红、绿、蓝三色源数据中的最小值对应的子像素是否为参与偏色补偿的子像素；
第一调整模块，用于当所述红、绿、蓝三色源数据中的最小值对应的子像素为参与偏色补偿的子像素时，增大所述白光混合率的值；
第二调整模块，用于当所述红、绿、蓝三色源数据中的最小值对应的子像素不是参与偏色补偿的子像素时，减小当前存储的白光混合率的值。
可选地，所述显示控制装置还包括：
第一统计模块，用于对所述参与色偏补偿的子像素的增益值进行统计；
所述第一调整模块，进一步用于当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，根据统计的所述参与色偏补偿的子像素的增益值，确定当前存储的白光混合率的增加值。
可选地，所述显示控制装置还包括：
第二统计模块，用于统计红、绿、蓝、白四色数据输出值；
第三调整模块，用于根据统计的红、绿、蓝、白四色数据输出值，调整当前存储的白光混合率的值。
可选地，所述第三调整模块具体用于比较所述红、绿、蓝三色数据输出值的平均值与白色数据输出值的平均值；当所述红、绿、蓝三色数据输出值的平均值大于所述白色数据的输出值的平均值时，增大所述白光混合率；当所述红、绿、蓝三色数据输出值的平均值小于所述白色数据的输出值的平均值时，减小所述白光混合率。
可选地，所述目标值是所述白光有机发光二极管显示装置所需的纯白光色的色度坐标。
本公开还提供一种白光有机发光二极管显示装置，包括上述显示控制装置。
本公开的上述技术方案的有益效果如下：
在将R、G、B三色源数据转换为R、G、B、W四色数据时，对WOLED的光色进行补偿，将WOLED的光色补回纯白光，使得在R、G、B三色源数据转换为R、G、B、W四色数据之后，图像不受WOLED光色偏色的影响，提高了白光OLED显示装置的显示画质。
附图说明
图1为本公开实施例中白光OLED显示装置的结构示意图；
图2为本公开实施例中白光OLED显示装置的显示控制方法的流程示意图；
图3为现有技术中未对WOLED的色度进行补偿时，RGB转换为RGBW的算法的示例图；
图4为本公开实施例中对WOLED的色度进行补偿时，RGB转换为RGBW的算法的示例图；
图5为本公开实施例中白光OLED显示装置的显示控制装置的结构示意图。
具体实施方式
为使本公开要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
首先，对本公开实施例的白光OLED显示装置的结构进行简单描述。
本公开实施例的白光OLED显示装置包括多个像素，每一像素包括用于产生红色光的R子像素、用于产生绿色光的G子像素、用于产生蓝色光的B子像素以及用于产生白光的W子像素。每一子像素均包括一白光有机发光二极管(WOLED)，该WOLED通过多种颜色的发射层的组合来显示白色。如图1所示，R子像素包括红色滤色器RCF，该红色滤色器RCF用于透射从WOLED入射的白光中的红色光，G子像素包括绿色滤色器GCF，该绿色滤色器GCF用于透射从WOLED入射的白光中的绿色光，B子像素包括蓝色滤色器BCF，该蓝色滤色器BCF用于透射从WOLED入射的白光中的蓝色光。W子像素不具有滤色器，透射从WOLED入射的全部白光，以补偿由于滤色 器RCF、GCF和BCF引起的图像亮度的降低。
由于WOLED是通过多种颜色的发射层的组合来显示白光的，其颜色根据所使用的材料的驱动电压而改变，这导致WOLED发射的白光不是标准的纯白光，此时，在R、G、B数据转换为R、G、B、W数据的方法中，如果用标准的纯白光取代一定程度的R、G、B子像素所发的光会造成偏色的图像。
为解决上述问题，请参考图2，本公开实施例提供了一种白光OLED显示装置的显示控制方法，所述方法包括以下步骤：
步骤S11：接收红、绿、蓝(R、G、B)三色源数据，并确定所述红、绿、蓝三色源数据中的最小值；
步骤S12：根据所述红、绿、蓝三色源数据中的最小值，确定白色数据；
其中，白色数据为亮度值。
步骤S13：根据所述白色数据，确定白光有机发光二极管(WOLED)的色度坐标；
步骤S14：获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值；
步骤S15：根据所述白光有机发光二极管的亮度值、参与偏色补偿的子像素的增益值和所述白色数据，确定红、绿、蓝、白(R、G、B、W)四色数据输出值。
通过上述实施例提供的方法，在将R、G、B三色源数据转换为R、G、B、W四色数据时，对WOLED的光色进行补偿，将WOLED的光色补回纯白光，使得在R、G、B三色源数据转换为R、G、B、W四色数据之后，图像不受WOLED光色偏色的影响，提高了白光OLED显示装置的显示画质。
在步骤S11中，接收的红、绿、蓝三色源数据可以是亮度值，也可以为灰阶值，当接收到的红、绿、蓝三色源数据为灰阶值时，需要将所述红、绿、蓝三色源数据中的最小值转换为亮度值。
具体的，可以采用以下公式进行灰阶-亮度转换：
Gray＝L(1/Γ)×GL
其中，Gray为灰阶值，L为亮度值，г表示伽马值，一般为2.2，GL为灰阶总数。
在步骤S12中，可以将所述红、绿、蓝三色源数据中的最小值直接作为白色数据，即利用白光完全取代所述最小值对应的子像素所发的光，当然，也可以根据需要仅利用白光部分取代所述最小值对应的子像素所发的光，即，所述根据所述红、绿、蓝三色源数据中的最小值，确定白色数据的步骤可以包括：
步骤S121：获取当前存储的白光混合率，所述白光混合率为白色数据与白色数据所要取代的所述红、绿、蓝三色源数据中的最小值的比率；
步骤S122：计算所述红、绿、蓝三色源数据中的最小值与所述白光混合率的乘积，得到所述白色数据。
具体地，所述白光数据输出值的计算公式可以为：
W＝WMR×min(R，G，B)
其中，W为白色数据，WMR为白光混合率(white-mixing ratio)，min(R，G，B)为红、绿、蓝三色源数据中的最小值。
举例来说，接收到的红、绿、蓝三色源数据(此实施例中均为亮度值)为R＝1，G＝0.8，B＝0.4，其中，蓝色源数据为最小值，假设白光混合率WMR为0.5，即采用白光取代的所述最小值对应的子像素的亮度值的50％，则此时白色数据的计算结果为：W＝WMR×min(R，G，B)＝0.5×0.4＝0.2。
在步骤S13中，可以通过查询一色度坐标表的方法确定WOLED的色度坐标，该色度坐标表记录有从多次实验测量中获得的不同的白色数据及与其对应的WOLED的色度坐标和红、绿、蓝色子像素的色度坐标，色度坐标表的内容可参考下表。
Figure PCTCN2015072302-appb-000001
有些情况下，上述色度坐标表中还可以记载有显示装置所需的纯白色的色度坐标，即所述目标值。
假设之前步骤中确定的白色数据为0.2，此时，查询该色度坐标表，得到对应的WOLED的色度坐标(O2x，O2y，O2z)。
在步骤S14中，针对一显示装置，当白光有机发光二极管的色度坐标已知时，可以根据该色度坐标，获得所述白光有机发光二极管的色度坐标要补偿至目标值时所需的白光有机发光二极管的亮度值以及参与偏色补偿的子像素的增益值。其中，参与偏色补偿的子像素是红、绿、蓝三个子像素中的两个子像素，是根据白光有机发光二极管的特性决定的。其中，目标值是该白光OLED显示装置所需的纯白光色的色度坐标，例如为(0.33，0.33，0.34)。
所述获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值的步骤可以包括：
获取所述色度坐标表中存储的所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标；
根据所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标，采用预定混色公式，计算所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值。
所述预定混色公式可以为：
L_WOLED＝(Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox
-Ax)/(Cx-Ax)-(Oz-Az)]LC
＝(Cy/Wy)(Wx-Ax)/(Cx-Ax)-(L_WOLED/Oy)(Ox
-Ax)/(Cx-Ax)
LA＝1-L_WOLED-LC
其中，O(Ox，Oy，Oz)为所述白色数据对应的白光有机发光二极管的色度坐标，A(Ax，Ay，Az)和C(Cx，Cy，Cz)为参与补偿的两个子像素的色度坐标，(Wx，Wy，Wz)为所述目标值的色度坐标，L_WOLED所述白光有机发光二极管的亮度值，LA、LC为参与补偿的两个子像素的增益值。
在步骤S15中，可以通过以下方法确定红、绿、蓝、白四色数据输出值的步骤包括：
对于参与补偿的子像素，获取参与偏色补偿的子像素的增益值与所述白色数据的乘积，并计算参与补偿的子像素的初始亮度值与对应的所述乘积的差值，得到参与补偿的子像素的最终亮度值；
对于未参与补偿的子像素，计算其初始亮度值与所述白色数据的差值，得到未参与补偿的子像素的最终亮度值，其中，子像素的初始亮度值根据所述红、绿、蓝三色源数据得到；
根据参与补偿的子像素的最终亮度值、未参与补偿的子像素的最终亮度值以及白光有机发光二极管的亮度值，确定红、绿、蓝、白四色数据输出值。
上述方法中，如果接收到的红、绿、蓝三色源数据为亮度数据，则红、绿、蓝子像素的初始亮度值即直接为源数据，如果接收到的红、绿、蓝三色源数据为灰阶数据，则需要将灰阶数据转换为亮度数据，得到红、绿、蓝子像素的初始亮度值。
具体的，可以采用下述公式计算子像素的最终亮度值：
R’＝R-R_gain×W
G’＝G-G_gain×W
B’＝B-B_gain×W
W’＝L_WOLED
其中，R’、G’、B’、W’分别为红、绿、蓝、白子像素的最终亮度值，R、G、B分别为根据红、绿、蓝三色源数据得到的初始亮度值，R_gain、G_gain、B_gain分别为红、绿、蓝三色增益值，其中，未参与补偿的子像素的增益值为1，W为所述白色数据，L_WOLED为所述白光有机发光二极管的亮度值。
请参考图3和图4，图3为现有技术中的未对WOLED的色度进行补偿时，RGB转换为RGBW的算法的示例图，图4为本公开实施例中对WOLED的色度进行补偿时，RGB转换为RGBW的算法的示例图，以图4所示R、G、B数据为例，从图4中可以看出，本公开实施中，首先获取R、G、B三色源数据的最小亮度值，即B色数据，将所述最小值作为白色数据(W)，然后根据白色数据查询色度坐标表，确定WOLED的色度坐标，然后根据WOLED 的色度坐标确定WOLED的亮度值和参与偏色补偿的子像素的亮度增益值(例如，本实施例中参与偏色补偿的子像素为R和G子像素)，最终根据所述WOLED的亮度值、白色数据和参与偏色补偿的子像素的亮度增益值，得到R、G、B、W四色数据输出值。
上述实施例中，如果后续所需的R、G、B、W四色数据输出值需要为灰阶值，还需要将得到的R、G、B、W的亮度输出值转换为灰阶值。
上述实施例中，由于参与偏色补偿的子像素会因偏色补偿而频繁被点亮，从而可能导致参与偏色补偿的子像素的寿命降低，为解决该问题，本公开实施例中，可以通过调整白光混合率(WMR)的值，来降低参与偏色补偿的子像素的使用情况，具体的：
所述根据所述红、绿、蓝三色源数据中的最小值，确定白色数据的步骤之前还包括：
判断所述红、绿、蓝三色源数据中的最小值对应的子像素是否为参与偏色补偿的子像素；
当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，增大当前存储的白光混合率的值。
此外，由于不参与偏色补偿的子像素总体使用情况较少，因而，还可以通过调整白光混合率(WMR)的值，增加未参与偏色补偿的子像素的使用情况，使得红、绿、蓝子像素的使用情况趋于平衡。
即，当所述红、绿、蓝三色源数据中的最小值对应的子像素不是参与偏色补偿的子像素时，减小当前存储的白光混合率的值。
举例来说，假设红色子像素和蓝色子像素是参与偏色补偿的子像素，当红、绿、蓝三色源数据中的最小值min(R，G，B)为红色或蓝色数据时，可以通过增大白光混合率(WMR)的值，以减少红色子像素或蓝色子像素的发光亮度。当红、绿、蓝三色源数据中的最小值min(R，G，B)为绿色数据时，可以减小白光混合率(WMR)的值，以增加绿色子像素的发光亮度。
此外，还可以对参与色偏补偿的子像素的增益值进行统计，当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，根据统计的增益值，确定当前存储的白光混合率需要增加的值。
举例来说，假设红色子像素和蓝色子像素是参与偏色补偿的子像素，当统计得到的红色子像素的增益值(可计算多个增益值的平均值)较大，蓝色子像素的增益值较小时，则当所述红、绿、蓝三色源数据中的最小值对应的子像素是红色子像素时，将白光混合率的值增加第一数值，当所述红、绿、蓝三色源数据中的最小值对应的子像素是蓝色子像素时，将白光混合率的值增加第二数值，其中，第一数值大于第二数值。
上述实施例中，如果要做到R、G、B、W四色数据的使用平衡，则需要统计四色数据的输出值，根据统计的四色数据的输出值，调整所述白光混合率。具体的：可以通过比较所述红、绿、蓝三色数据输出值的平均值与白色数据输出值的平均值，当所述红、绿、蓝三色数据输出值的平均值大于所述白色数据的输出值的平均值时，则增大所述白光混合率；当所述红、绿、蓝三色数据输出值的平均值小于所述白色数据的输出值的平均值时，减小所述白光混合率。
上述实施例中，需要有适当的伽玛(gamma)配合才能使用，本公开实施例中，可以在接收到红、绿、蓝三色数据之后，使用预设伽玛曲线对接收到的红、绿、蓝三色数据进行伽玛变换，即上述实施例中的参与运算的红、绿、蓝三色数据是经伽玛变换后的数据。
请参考图5，本公开实施例还提供一种白光OLED显示装置的显示控制装置，包括：
接收模块，用于接收红、绿、蓝三色源数据；
最小值确定模块，用于确定所述红、绿、蓝三色源数据中的最小值；
白色数据确定模块，用于根据所述红、绿、蓝三色源数据中的最小值，确定白色数据；
色度坐标确定模块，用于根据所述白色数据，确定白光有机发光二极管的色度坐标；
增益值确定模块，用于获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值；
算法转换模块，用于根据所述白光有机发光二极管的亮度值、参与偏色 补偿的子像素的增益值和所述白色数据，确定红、绿、蓝、白四色数据输出值。
通过上述实施例提供的装置，在将R、G、B三色源数据转换为R、G、B、W四色数据时，对WOLED的光色进行补偿，将WOLED的光色补回纯白光，使得在R、G、B三色源数据转换为R、G、B、W四色数据之后，图像不受WOLED光色偏色的影响，提高了白光OLED显示装置的显示画质。
所述接收模块接收的红、绿、蓝三色源数据可以是亮度值，也可以为灰阶值，当接收到的红、绿、蓝三色源数据为灰阶值时，需要将所述红、绿、蓝三色源数据中的最小值转换为亮度值。
具体的，可以采用以下公式进行灰阶-亮度转换：
Gray＝L(1/Γ)×GL
其中，Gray为灰阶值，L为亮度值，г表示伽马值，一般为2.2，GL为灰阶总数。
所述白色数据确定模块可以将所述红、绿、蓝三色源数据中的最小值直接作为白色数据，即利用白光完全取代所述最小值对应的子像素所发的光，当然，也可以根据需要仅利用白光部分取代所述最小值对应的子像素所发的光，即，所述有机发光二极管显示装置还可以包括：
存储模块，用于存储白光混合率，所述白光混合率为白色数据与白色数据所要取代的所述红、绿、蓝三色源数据中的最小值的比率；
所述白色数据确定模块具体用于获取所述存储模块存储的白光混合率，并计算所述红、绿、蓝三色源数据中的最小值与所述白光混合率的乘积，得到所述白色数据。
具体地，所述白光数据输出值的计算公式可以为：
W＝WMR×min(R，G，B)
其中，W为白色数据，WMR为白光混合率(white-mixing ratio)，min(R，G，B)为红、绿、蓝三色源数据中的最小值。
所述色度坐标确定模块可以通过查询色度坐标表的方法确定WOLED的色度坐标，该色度坐标表记录有从多次实验测量中获得的不同白色数据及与其对应的WOLED的色度坐标和红、绿、蓝色子像素的色度坐标。
针对一显示装置，当白光有机发光二极管的色度坐标已知时，可以根据该色度坐标，获得所述白光有机发光二极管的色度坐标要补偿至目标值时，所需的白光有机发光二极管的亮度值以及参与偏色补偿的子像素的增益值。其中，参与偏色补偿的子像素是红、绿、蓝三个子像素中的两个子像素，是根据白光有机发光二极管的特性决定的。其中，目标值是该白光OLED显示装置所需的纯白光色的色度坐标，例如为(0.33，0.33，0.33)。
可选地，所述增益值确定模块具体用于获取所述色度坐标表中存储的所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标；根据所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标，采用预定混色公式计算所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值。
所述预定混色公式可以为：
L_WOLED＝(Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox
-Ax)/(Cx-Ax)-(Oz-Az)]LC
＝(Cy/Wy)(Wx-Ax)/(Cx-Ax)-(L_WOLED/Oy)(Ox
-Ax)/(Cx-Ax)
LA＝1-L_WOLED-LC
其中，O(Ox，Oy，Oz)为所述白色数据对应的白光有机发光二极管的色度坐标，A(Ax，Ay，Az)和C(Cx，Cy，Cz)为参与补偿的两个子像素的色度坐标，(Wx，Wy，Wz)为所述目标值的色度坐标，L_WOLED所述白光有机发光二极管的亮度值，LA、LC为参与补偿的两个子像素的增益值。
可选地，所述算法转换模块具体用于对于参与补偿的子像素，获取参与偏色补偿的子像素的增益值与所述白色数据的乘积，并计算参与补偿的子像素的初始亮度值与对应的所述乘积的差值，得到参与补偿的子像素的最终亮度值；对于未参与补偿的子像素，计算其初始亮度值与所述白色数据的差值，得到未参与补偿的子像素的最终亮度值，其中，子像素的初始亮度值根据所述红、绿、蓝三色源数据得到；根据参与补偿的子像素的最终亮度值、未参与补偿的子像素的最终亮度值以及白光有机发光二极管的亮度值，确定红、 绿、蓝、白四色数据输出值。
所述算法转换模块采用下述公式计算子像素的最终亮度值：
R’＝R-R_gain×W
G’＝G-G_gain×W
B’＝B-B_gain×W
W’＝L_WOLED
其中，R’、G’、B’、W’分别为红、绿、蓝、白子像素的最终亮度值，R、G、B分别为根据红、绿、蓝三色源数据得到的初始亮度值，R_gain、G_gain、B_gain分别为红、绿、蓝三色增益值，其中，未参与补偿的子像素的增益值为1，W为所述白色数据，L_WOLED为所述白光有机发光二极管的亮度值。
上述实施例中，如果后续所需的R、G、B、W四色数据输出值需要为灰阶值，还需要将得到的R、G、B、W的亮度输出值转换为灰阶值。
上述实施例中，由于参与偏色补偿的子像素会因偏色补偿而频繁被点亮，从而可能导致参与偏色补偿的子像素的寿命降低，为解决该问题，本公开实施例中，可以通过调整白光混合率(WMR)的值，来降低参与偏色补偿的子像素的使用情况，具体的，所述白光有机发光二极管显示装置还可以包括：
判断模块，用于判断所述红、绿、蓝三色源数据中的最小值对应的子像素是否为参与偏色补偿的子像素；
第一调整模块，用于当所述红、绿、蓝三色源数据中的最小值对应的子像素为参与偏色补偿的子像素时，增大所述白光混合率的值；
第二调整模块，用于当所述红、绿、蓝三色源数据中的最小值对应的子像素不是参与偏色补偿的子像素时，减小当前存储的白光混合率的值。
此外，还可以对参与色偏补偿的子像素的增益值进行统计，当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，根据统计的增益值，确定当前存储的白光混合率需要增加的值。
具体的，白光有机发光二极管显示装置还可以包括：
第一统计模块，用于对所述参与色偏补偿的子像素的增益值进行统计；
所述第一调整模块，进一步用于当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，根据统计的所述参与色偏补偿 的子像素的增益值，确定当前存储的白光混合率的增加值。
上述实施例中，如果要做到R、G、B、W四色数据的使用平衡，则需要统计四色数据的输出值，根据统计的四色数据的输出值，调整所述白光混合率。具体的：可以通过比较所述红、绿、蓝三色数据输出值的平均值与白色数据输出值的平均值，当所述红、绿、蓝三色数据输出值的平均值大于所述白色数据的输出值的平均值时，则增大所述白光混合率；当所述红、绿、蓝三色数据输出值的平均值小于所述白色数据的输出值的平均值时，减小所述白光混合率。
具体的，白光有机发光二极管显示装置还可以包括：
第二统计模块，用于统计红、绿、蓝、白四色数据输出值；
第三调整模块，用于根据统计的红、绿、蓝、白四色数据输出值，调整当前存储的白光混合率的值。
所述第三调整模块具体用于比较所述红、绿、蓝三色数据输出值的平均值与白色数据输出值的平均值；当所述红、绿、蓝三色数据输出值的平均值大于所述白色数据的输出值的平均值时，增大所述白光混合率；当所述红、绿、蓝三色数据输出值的平均值小于所述白色数据的输出值的平均值时，减小所述白光混合率。
以上所述是本公开的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (25)

  1. 一种白光有机发光二极管显示装置的显示控制方法，包括：
    接收红、绿、蓝三色源数据，并确定所述红、绿、蓝三色源数据中的最小值；
    根据所述红、绿、蓝三色源数据中的最小值，确定白色数据；
    根据所述白色数据，确定白光有机发光二极管的色度坐标；
    获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值；
    根据所述白光有机发光二极管的亮度值、参与偏色补偿的子像素的增益值和所述白色数据，确定红、绿、蓝、白四色数据输出值。
  2. 根据权利要求1所述的显示控制方法，其中，所述根据所述白色数据，确定白光有机发光二极管的色度坐标的步骤包括：
    根据所述白色数据，查询色度坐标表，获取所述白色数据对应的白光有机发光二极管的色度坐标，其中，所述色度坐标表中记录有不同的白色数据和与其对应的白光有机发光二极管的色度坐标及红、绿、蓝色子像素的色度坐标。
  3. 根据权利要求2所述的显示控制方法，其中，所述获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值的步骤包括：
    获取所述色度坐标表中存储的所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标；
    根据所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标，采用预定混色公式计算所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值。
  4. 根据权利要求3所述的显示控制方法，其中，所述预定混色公式为：
    L_WOLED＝(Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox-Ax)/(Cx-Ax)-(Oz-Az)]LC
    ＝(Cy/Wy)(Wx-Ax)/(Cx-Ax)-(L_WOLED/Oy)(Ox-Ax)/(Cx-Ax)
    LA＝1-L_WOLED-LC
    其中，O(Ox，Oy，Oz)为所述白色数据对应的白光有机发光二极管的色度坐标，A(Ax，Ay，Az)和C(Cx，Cy，Cz)为参与补偿的两个子像素的色度坐标，(Wx，Wy，Wz)为所述目标值的色度坐标，L_WOLED所述白光有机发光二极管的亮度值，LA、LC为参与补偿的两个子像素的增益值。
  5. 根据权利要求1所述的显示控制方法，其中，所述根据所述白光有机发光二极管的亮度值、参与偏色补偿的子像素的增益值和所述白色数据，确定红、绿、蓝、白四色数据输出值的步骤包括：
    对于参与补偿的子像素，获取参与偏色补偿的子像素的增益值与所述白色数据的乘积，并计算参与补偿的子像素的初始亮度值与对应的所述乘积的差值，得到参与补偿的子像素的最终亮度值；对于未参与补偿的子像素，计算其初始亮度值与所述白色数据的差值，得到未参与补偿的子像素的最终亮度值，其中，子像素的初始亮度值根据所述红、绿、蓝三色源数据得到；
    根据参与补偿的子像素的最终亮度值、未参与补偿的子像素的最终亮度值以及白光有机发光二极管的亮度值，确定红、绿、蓝、白四色数据输出值。
  6. 根据权利要求5所述的显示控制方法，其中，采用下述公式计算子像素的最终亮度值：
    R’＝R-R_gain×W
    G’＝G-G_gain×W
    B’＝B-B_gain×W
    W’＝L_WOLED
    其中，R’、G’、B’、W’分别为红、绿、蓝、白子像素的最终亮度值，R、G、B分别为根据红、绿、蓝三色源数据得到的初始亮度值，R_gain、G_gain、B_gain分别为红、绿、蓝三色增益值，其中，未参与补偿的子像素的增益值为1，W为所述白色数据，L_WOLED为所述白光有机发光二极管的亮度值。
  7. 根据权利要求1所述的显示控制方法，其中，所述根据所述红、绿、蓝三色源数据中的最小值，确定白色数据的步骤包括：
    获取当前存储的白光混合率，所述白光混合率为白色数据与白色数据所要取代的所述红、绿、蓝三色源数据中的最小值的比率；
    计算所述红、绿、蓝三色源数据中的最小值与所述白光混合率的乘积，得到所述白色数据。
  8. 根据权利要求7所述的显示控制方法，其中，所述根据所述红、绿、蓝三色源数据中的最小值，确定白色数据的步骤之前还包括：
    判断所述红、绿、蓝三色源数据中的最小值对应的子像素是否为参与偏色补偿的子像素；
    当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，增大当前存储的白光混合率的值；
    当所述红、绿、蓝三色源数据中的最小值对应的子像素不是参与偏色补偿的子像素时，减小当前存储的白光混合率的值。
  9. 根据权利要求8所述的显示控制方法，其中，所述增大当前存储的白光混合率的值的步骤包括：
    对所述参与色偏补偿的子像素的增益值进行统计；
    当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，根据统计的所述参与色偏补偿的子像素的增益值，确定当前存储的白光混合率的增加值。
  10. 根据权利要求7所述的显示控制方法，其中，还包括：
    统计红、绿、蓝、白四色数据输出值；
    根据统计的红、绿、蓝、白四色数据输出值，调整当前存储的白光混合率的值。
  11. 根据权利要求10所述的显示控制方法，其中，所述根据统计的红、绿、蓝、白四色数据输出值，调整当前存储的白光混合率的值的步骤包括：
    比较所述红、绿、蓝三色数据输出值的平均值与白色数据输出值的平均值；
    当所述红、绿、蓝三色数据输出值的平均值大于所述白色数据的输出值 的平均值时，增大所述白光混合率；
    当所述红、绿、蓝三色数据输出值的平均值小于所述白色数据的输出值的平均值时，减小所述白光混合率。
  12. 根据权利要求1所述的显示控制方法，其中，
    所述目标值是所述白光有机发光二极管显示装置所需的纯白光色的色度坐标。
  13. 一种白光有机发光二极管显示装置的显示控制装置，包括：
    接收模块，用于接收红、绿、蓝三色源数据；
    最小值确定模块，用于确定所述红、绿、蓝三色源数据中的最小值；
    白色数据确定模块，用于根据所述红、绿、蓝三色源数据中的最小值，确定白色数据；
    色度坐标确定模块，用于根据所述白色数据，确定白光有机发光二极管的色度坐标；
    增益值确定模块，用于获取所述白光有机发光二极管的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值及参与偏色补偿的子像素的增益值；
    算法转换模块，用于根据所述白光有机发光二极管的亮度值、参与偏色补偿的子像素的增益值和所述白色数据，确定红、绿、蓝、白四色数据输出值。
  14. 根据权利要求13所述的显示控制装置，其中，
    所述色度坐标确定模块，具体用于根据所述白色数据，查询色度坐标表，获取所述白色数据对应的白光有机发光二极管的色度坐标，其中，所述色度坐标表中记录有不同的白色数据和与其对应的白光有机发光二极管的色度坐标及红、绿、蓝色子像素的色度坐标。
  15. 根据权利要求14所述的显示控制装置，其中，
    所述增益值确定模块，具体用于获取所述色度坐标表中存储的所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标；根据所述白色数据对应的白光有机发光二极管的色度坐标及参与偏色补偿的子像素的色度坐标，采用预定混色公式计算所述白光有机发光二极管 的色度坐标要补偿至目标值时所需的所述白光有机发光二极管的亮度值和参与偏色补偿的子像素的增益值。
  16. 根据权利要求15所述的显示控制装置，其中，所述预定混色公式为：
    L_WOLED＝(Oy/Wy)*[(Wx-Ax)/(Cx-Ax)-(Wz-Az)/(Cz-Az)]/[(Ox-Ax)/(Cx-Ax)-(Oz-Az)]LC
    ＝(Cy/Wy)(Wx-Ax)/(Cx-Ax)-(L_WOLED/Oy)(Ox-Ax)/(Cx-Ax)
    LA＝1-L_WOLED-LC
    其中，O(Ox，Oy，Oz)为所述白色数据对应的白光有机发光二极管的色度坐标，A(Ax，Ay，Az)和C(Cx，Cy，Cz)为参与补偿的两个子像素的色度坐标，(Wx，Wy，Wz)为所述目标值的色度坐标，L_WOLED所述白光有机发光二极管的亮度值，LA、LC为参与补偿的两个子像素的增益值。
  17. 根据权利要求13所述的显示控制装置，其中，
    所述算法转换模块，具体用于对于参与补偿的子像素，获取参与偏色补偿的子像素的增益值与所述白色数据的乘积，并计算参与补偿的子像素的初始亮度值与对应的所述乘积的差值，得到参与补偿的子像素的最终亮度值；对于未参与补偿的子像素，计算其初始亮度值与所述白色数据的差值，得到未参与补偿的子像素的最终亮度值，其中，子像素的初始亮度值根据所述红、绿、蓝三色源数据得到；根据参与补偿的子像素的最终亮度值、未参与补偿的子像素的最终亮度值以及白光有机发光二极管的亮度值，确定红、绿、蓝、白四色数据输出值。
  18. 根据权利要求17所述的显示控制装置，其中，所述算法转换模块采用下述公式计算子像素的最终亮度值：
    R’＝R-R_gain×W
    G’＝G-G_gain×W
    B’＝B-B_gain×W
    W’＝L_WOLED
    其中，R’、G’、B’、W’分别为红、绿、蓝、白子像素的最终亮度值，R、G、B分别为根据红、绿、蓝三色源数据得到的初始亮度值，R_gain、G_gain、 B_gain分别为红、绿、蓝三色增益值，其中，未参与补偿的子像素的增益值为1，W为所述白色数据，L_WOLED为所述白光有机发光二极管的亮度值。
  19. 根据权利要求13所述的显示控制装置，其中，还包括：
    存储模块，用于存储白光混合率，所述白光混合率为白色数据与白色数据所要取代的所述红、绿、蓝三色源数据中的最小值的比率；
    所述白色数据确定模块具体用于获取所述存储模块存储的白光混合率，并计算所述红、绿、蓝三色源数据中的最小值与所述白光混合率的乘积，得到所述白色数据。
  20. 根据权利要求19所述的显示控制装置，其中，还包括：
    判断模块，用于判断所述红、绿、蓝三色源数据中的最小值对应的子像素是否为参与偏色补偿的子像素；
    第一调整模块，用于当所述红、绿、蓝三色源数据中的最小值对应的子像素为参与偏色补偿的子像素时，增大所述白光混合率的值；
    第二调整模块，用于当所述红、绿、蓝三色源数据中的最小值对应的子像素不是参与偏色补偿的子像素时，减小当前存储的白光混合率的值。
  21. 根据权利要求20所述的显示控制装置，其中，还包括：
    第一统计模块，用于对所述参与色偏补偿的子像素的增益值进行统计；
    所述第一调整模块，进一步用于当所述红、绿、蓝三色源数据中的最小值对应的子像素是参与偏色补偿的子像素时，根据统计的所述参与色偏补偿的子像素的增益值，确定当前存储的白光混合率的增加值。
  22. 根据权利要求19所述的显示控制装置，其中，还包括：
    第二统计模块，用于统计红、绿、蓝、白四色数据输出值；
    第三调整模块，用于根据统计的红、绿、蓝、白四色数据输出值，调整当前存储的白光混合率的值。
  23. 根据权利要求22所述的显示控制装置，其中，
    所述第三调整模块，具体用于比较所述红、绿、蓝三色数据输出值的平均值与白色数据输出值的平均值；当所述红、绿、蓝三色数据输出值的平均值大于所述白色数据的输出值的平均值时，增大所述白光混合率；当所述红、绿、蓝三色数据输出值的平均值小于所述白色数据的输出值的平均值时，减 小所述白光混合率。
  24. 根据权利要求13所述的显示控制装置，其中，
    所述目标值是所述白光有机发光二极管显示装置所需的纯白光色的色度坐标。
  25. 一种白光有机发光二极管显示装置，包括如权利要求13-24任一项所述的显示控制装置。
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