WO2016062248A1 - Woled显示装置的图像显示控制方法及装置、显示装置 - Google Patents

Woled显示装置的图像显示控制方法及装置、显示装置 Download PDF

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WO2016062248A1
WO2016062248A1 PCT/CN2015/092422 CN2015092422W WO2016062248A1 WO 2016062248 A1 WO2016062248 A1 WO 2016062248A1 CN 2015092422 W CN2015092422 W CN 2015092422W WO 2016062248 A1 WO2016062248 A1 WO 2016062248A1
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Prior art keywords
light
color
pixel
white sub
data
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PCT/CN2015/092422
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English (en)
French (fr)
Inventor
宋丹娜
盖翠丽
曾思衡
孟松
吴仲远
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京东方科技集团股份有限公司
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Priority to EP15852161.7A priority Critical patent/EP3211632A4/en
Priority to US15/037,797 priority patent/US10262571B2/en
Publication of WO2016062248A1 publication Critical patent/WO2016062248A1/zh

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    • 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
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    • 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
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    • 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
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    • 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]
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    • G09G3/3225—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] using an active matrix
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Definitions

  • the present invention relates to the field of image display technologies, and in particular, to an image display control method and apparatus for a WOLED display device, and a display device.
  • AMOLEDs Active matrix type organic light emitting diodes
  • OLED organic light emitting diode
  • TFT thin film transistor
  • a typical OLED device has a plurality of pixels, each of which includes an R (red) sub-pixel, a G (green) sub-pixel, and a B (blue) sub-pixel for full color display.
  • An R light-emitting layer for generating red light is formed in the R sub-pixel
  • a G light-emitting layer for generating green light is formed in the G sub-pixel
  • a B light-emitting layer for generating blue light is formed in the B sub-pixel.
  • the light-emitting layer is independently deposited for each sub-pixel by a fine metal mask (FMM) method or the like using a metal mask.
  • FMM fine metal mask
  • the conventional deposition method using FMM reduces the yield because it is difficult to accurately pattern the light-emitting layer. As a result, it is difficult to apply the method to a large-area and high-precision display.
  • the white OLED has a structure in which an R light-emitting layer, a G light-emitting layer, a B light-emitting layer, or the like is optionally laminated between a cathode and an anode, and a white OLED is formed for each sub-pixel.
  • the white OLED display has a plurality of pixels, each pixel including R sub-pixels, G sub-pixels, B sub-pixels, and W (white) sub-pixels for color display.
  • the R sub-pixel includes an R color filter for transmitting red light in white light incident from the white OLED
  • the G sub-pixel includes a G color filter for transmitting white light incident from the white OLED
  • the green light in the light the B sub-pixel includes a B color filter for transmitting blue light in white light incident from the white OLED.
  • the W sub-pixel may not be provided with a color filter, and transmits all white light incident from the white OLED to compensate for a decrease in image brightness due to the color filter.
  • This white OLED display generates W data based on R data, G data, and B data input from the outside, and modulates the subsequently output R data, G data, and B data using the generated W data.
  • W The W data, the modulated R data, the modulated G data, and the modulated B data are displayed in the sub-pixel, the R sub-pixel, the G sub-pixel, and the B sub-pixel.
  • An embodiment of the present invention provides an image display control method for a WOLED display device, including:
  • the obtained brightness data of the white sub-pixel light satisfies the following two conditions:
  • the brightness data of one of the color lights is a product of the adjusted brightness data of the white sub-pixel light and the ratio of the corresponding color light of the white sub-pixel light;
  • the luminance data of the other kinds of color light of each of the color lights is respectively larger than the product of the ratio of the adjusted luminance data of the white sub-pixel light to the corresponding color of the white sub-pixel light.
  • the adjusted brightness data of the one color light is 0, and the adjusted brightness data of the other color light is respectively adjusted for the brightness data of the other color light minus the white sub-pixel light.
  • the adjusting brightness data of the white sub-pixel light and the adjusting brightness data of each color light according to the brightness data of each color light and the proportion of the corresponding color light in the white sub-pixel light including:
  • the adjusted brightness data of the white sub-pixel light is output, and the color light of each color is other than the current color light. Adjusting the brightness data of other kinds of color lights, and outputting the adjusted brightness data of the current color light in each color light is zero; otherwise, selecting the other of the color lights as the current color light, and repeating the above steps to The adjusted brightness data of the white sub-pixel light and the adjusted brightness data of each color light are recalculated.
  • the ratio of the light corresponding to each color in the white sub-pixel light is obtained by measuring the color coordinates of the light emitted by the white sub-pixel and the color coordinates of the light emitted by the color sub-pixels.
  • the gray scale data of each color light input by the signal source is converted into luminance data of each color light, and the adjusted brightness data of the white sub-pixel light and the adjusted brightness of each color light
  • the data is converted into gray scale data, which is converted by the gamma curve of each color light and white sub-pixel light.
  • the method before the converting by the gamma curve of each color light and white sub-pixel light, the method further comprises: adjusting a gamma curve of the color light and the white sub-pixel light in advance.
  • the pre-adjusting the gamma curve of the color light comprises:
  • the gamma curve of each color light is respectively adjusted correspondingly by using the highest gray scale luminance data of the respective color lights.
  • the pre-adjusting the gamma curve of the white sub-pixel light comprises:
  • the gamma curve of the white sub-pixel light is adjusted using the highest gray level luminance of the white sub-pixel light.
  • the highest gray level brightness of the white sub-pixel light satisfies the following two conditions:
  • the highest grayscale luminance value of one of the color lights is a product of a ratio of a highest grayscale luminance value of the white subpixel light to a ratio of the one color light corresponding to the white subpixel light;
  • the highest grayscale luminance value of the other color light of each of the color lights is greater than the product of the highest grayscale luminance value of the white subpixel light and the ratio of the corresponding color light of the white subpixel light.
  • the highest grayscale luminance value of each color light is obtained by adjusting the gamma curve of each color light.
  • each of the colors includes three colors of red, green, and blue.
  • An embodiment of the present invention further provides an image display control device for a WOLED display device, including:
  • a conversion unit configured to convert gray scale data of each color light input by the signal source into brightness data of each color light
  • the adjusting unit is configured to obtain adjusted brightness data of the white sub-pixel light and adjusted brightness data of each color light according to the brightness data of each color light and the proportion of the corresponding color light in the white sub-pixel light;
  • An inverse conversion unit configured to convert the adjusted luminance data of the white sub-pixel light and the adjusted luminance data of each color light into gray scale data, and output and display;
  • the adjusted brightness data of the white sub-pixel light obtained by the adjusting unit satisfies the following two conditions:
  • the luminance data of one of the color lights is a product of a ratio of the adjusted luminance data of the white sub-pixel light to a ratio of the one of the white sub-pixel lights;
  • the luminance data of the other kinds of color light of the respective color lights is larger than the product of the ratio of the adjusted luminance data of the white sub-pixel light to the ratio of the other kinds of color light corresponding to the white sub-pixel light.
  • the adjusting unit is configured to:
  • the adjusted brightness data of the white sub-pixel light is output, and the color light of each color is other than the current color light. Adjusting the brightness data of other kinds of color lights, and outputting the adjusted brightness data of the current color light in each color light is zero; otherwise, selecting the other of the color lights as the current color light, and repeating the above steps to The adjusted brightness data of the white sub-pixel light and the adjusted brightness data of each color light are recalculated.
  • the image display control device further includes:
  • a gamma curve adjustment unit for adjusting a gamma curve of the respective color lights and white sub-pixel lights before image display control.
  • the gamma curve adjustment unit is configured to:
  • the gamma curve of the white sub-pixel light is adjusted using the highest gray level luminance of the white sub-pixel light.
  • Embodiments of the present invention also provide a WOLED display device including the image display control device as described above.
  • FIG. 1 is a flow chart of an image display control method of a WOLED display device according to the present invention
  • FIG. 2 is a flow chart of a method for adjusting a gamma curve of each color light in the present invention
  • FIG. 3 is a flow chart of a method for adjusting a gamma curve of white sub-pixel light in the present invention
  • FIG. 4 is a flowchart of a method for adjusting adjusted luminance data of white sub-pixel light and adjusted luminance data of each color light in the present invention
  • Fig. 5 is a schematic view showing the outline of an image display control device for a WOLED display device of the present invention.
  • An image display control method for a WOLED display device is mainly for calculating light of each color according to brightness values in respective color light data (such as RGB data) in an image to be displayed input from a signal source.
  • the brightness value and the adjusted brightness value of the white sub-pixel light are adjusted such that, on the basis that the white sub-pixel emits the corresponding white light, part of the sub-pixels corresponding to the respective color lights emit light to compensate the light of the corresponding color.
  • FIG. 1 is a flow chart showing an image display control method of a WOLED display device proposed by the present invention. As shown in Figure 1, it includes:
  • Step 101 Convert grayscale data of each color light input by the signal source into luminance data of each color light
  • Step 102 Obtain adjusted brightness data of white sub-pixel light and adjusted brightness data of each color light according to brightness data of each color light and a ratio of each color light corresponding to white sub-pixel light;
  • Step 103 Convert the adjusted brightness data of the white sub-pixel light and the adjusted brightness data of each color light into gray scale data, and output and display;
  • the obtained brightness data of the white sub-pixel light satisfies the following two conditions:
  • the luminance data of one of the color lights is a product of a ratio of the adjusted luminance data of the white sub-pixel light to a ratio of the one of the white sub-pixel lights;
  • the luminance data of the other kinds of color light of the respective color lights is respectively larger than the product of the ratio of the adjusted luminance data of the white sub-pixel light to the corresponding color light of the white sub-pixel light.
  • the display data of the current image frame to be displayed is first acquired from the signal source.
  • the display data is typically RGB data, which includes grayscale data for each color of light, such as RGB.
  • step 101 the gray scale data in the RGB data is converted into luminance data of RGB.
  • the conversion is typically converted using a gamma curve.
  • the gamma curve is used to indicate the display brightness of the corresponding color light at different gray levels.
  • the most commonly used is the gamma curve 2.2, that is, the display luminance value of the corresponding gray scale is 2.2 power of the gray scale.
  • the gamma curve of each color light used for gray scale conversion in step 101 in the embodiment of the present invention is a gamma curve adjusted in advance to the standard gamma curve 2.2.
  • other gamma curves such as gamma curves 1, 2.5, etc., can also be used in the present invention, and are selected according to actual conditions.
  • the display can be tested before the display is shipped from the factory and adjusted to obtain the corresponding gamma curve.
  • the specific adjustment process is shown in Figure 2.
  • the specific method steps of adjusting the gamma curve of each color light include:
  • Step 201 Measure the color coordinates of each color light in the test screen displayed by the display
  • the step may be to display a monochrome picture of each color (such as RGB) in the display, and then measure the color coordinates of each color light when the test picture is displayed on the light emitting side of the display by using a measuring instrument.
  • a monochrome picture of each color such as RGB
  • Step 202 Calculate the display ratio of each color light in the target white light by using the color coordinates of the target white light and the measured color coordinates of each color light;
  • the target white light is white light corresponding to the target color coordinate under the preset white balance. Therefore, by calculating the display ratio of each color light in the target white light, it is possible to determine parameters of each color light in an ideal case, such as the highest grayscale luminance value.
  • Step 203 Adjust the gamma curve of each color light by using the display ratio of each color light in the target white light and the highest grayscale brightness value of the target white light.
  • the standard gamma curve is a gamma curve predetermined according to actual conditions, such as a gamma curve 2.2 and the like.
  • the specific adjustment method of the gamma curve belongs to a well-known technique in the art and will not be described in detail herein.
  • the gamma curve of each color light is adjusted by the target white light.
  • the adjusted gamma can be obtained.
  • the curve converts grayscale data into luminance data.
  • the present invention is directed to a WOLED display device, a gamma curve of white sub-pixel light is also required during display. Therefore, while adjusting the gamma curve of each color light, the present invention also needs to adjust the gamma curve of the white sub-pixel light.
  • the specific adjustment process is shown in Figure 3.
  • the specific method steps of adjusting the gamma curve of the white sub-pixel light include:
  • Step 301 Measure the color coordinate of each color light and the color coordinate of the white sub-pixel light in the test picture displayed by the display, and calculate the white sub-pixel light by using the color coordinate of the white sub-pixel light and the color coordinate of each color light. Corresponding ratio of light of each color;
  • This step is the same as step 201 above, and the measurement instrument is used to measure on the light-emitting side of the display.
  • the color coordinate of the light emitted by the white sub-pixel can be measured by separately displaying a white screen to obtain the color of the white sub-pixel light. Coordinates; accordingly, the color coordinates of the light emitted by the other color sub-pixels are tested by separately displaying other colors (such as red, green, blue, etc.), that is, the color coordinates of the respective color lights are obtained. Thereafter, the measured color coordinates of the white sub-pixel light and the color coordinates of the sub-pixel light of each color are used to obtain the ratio of the respective color lights corresponding to the light emitted by the white sub-pixel.
  • the ratio of the light corresponding to each color in the white sub-pixel light refers to the ratio of the light of the corresponding sub-pixel light in the light emitted by the white sub-pixel.
  • white light can be mixed by a certain proportion of light such as red, green and blue.
  • white light of a certain gray level can be composed of 0.33 red light, 0.33 green light, and 0.34 blue light.
  • the ratio of the respective color lights (red, green, and blue) in the white sub-pixels is 0.33, 0.33, and 0.34, respectively.
  • this step and step 201 can be performed simultaneously.
  • each color light is obtained by filtering white light emitted from a white sub-pixel, and white sub-pixel light is obtained by unfiltered light.
  • Step 302 Determine a highest grayscale luminance value of the white sub-pixel light according to the highest grayscale luminance value of each color light and the proportion of the corresponding color light in the white subpixel light;
  • the highest gray scale luminance value of the respective color lights can be obtained according to the gamma curve.
  • the highest grayscale luminance value of the white sub-pixel light to be determined needs to satisfy the following two conditions:
  • the highest grayscale luminance value of one of the color lights is a product of a highest grayscale luminance value of the white subpixel light and a ratio of the one color light of the white subpixel light;
  • the highest grayscale luminance values of the other color light of the respective color lights are respectively greater than the product of the highest grayscale luminance value of the white subpixel light and the ratio of the corresponding color light of the white subpixel light.
  • each color light is obtained by filtering the white light with a corresponding filter, for example, the red light is obtained by filtering out the color light other than the red light in the white light through the red filter.
  • the WOLED display device further includes a white sub-pixel that directly outputs white light without requiring a filter Filtered. Therefore, when the display finally displays the screen, in order to ensure that the luminance value of each color light can reach the actually required luminance value, in the present invention, the light emitted by the sub-pixel corresponding to the other color light is used on the basis that the white sub-pixel emits white light. Make compensation to solve the color shift problem.
  • the highest gray scale luminance value of the white sub-pixel light in the embodiment of the present invention is obtained by the above two conditions. Specifically, the highest grayscale luminance value of one of the color lights is equal to the luminance value of the color of the white subpixel light, so that when the screen is actually displayed, the white subpixel light is The proportion of the color light is exactly in accordance with the actual data to be displayed, so the sub-pixel corresponding to the color light does not need to be illuminated, but is directly obtained by the light emitted by the white sub-pixel; at the same time, the brightness value of other color light except the white sub-pixel In addition to the portion acquired in the pixel light, the sub-pixel corresponding to the other color light is required to emit light to compensate for the insufficient portion. Therefore, it is necessary to make the proportion of the other color light in the white sub-pixel light smaller than the actual color data to be displayed.
  • the highest gray level brightness of the white sub-pixel light can be obtained by the following set of formulas:
  • R max is the highest gray level brightness value of red light
  • G max is the highest gray level brightness value of green light
  • B max is the highest gray level brightness value of blue light
  • L smax is the highest gray level brightness of white sub-pixel light
  • R s , G s , and B s are the ratios of red light, green light, and blue light in the white sub-pixel light, respectively, which is calculated by step 301.
  • the L smax In order to obtain the highest gray scale luminance value L smax of the white sub-pixel light, it is necessary to assume that the value of one of the above formulas is equal to 0, and the values of the other two formulas are greater than zero. For example, by assuming a first value R max -R s L smax obtained L smax equals 0, and the value obtained such that the value of L smax G max -G s L smax and B max -B s L smax is greater than 0 Then, the L smax can be determined as the highest gray scale luminance value of the white sub-pixel light.
  • Step 303 Adjust the gamma curve of the white sub-pixel light by using the highest gray level brightness of the white sub-pixel light.
  • the predetermined standard gamma curve After obtaining the highest grayscale luminance value of the white sub-pixel light, the predetermined standard gamma curve can be adjusted according to the commonly used gamma curve adjustment method.
  • step 101 the gray scale data of each color light to be actually displayed is converted into luminance data, and in step 102, the luminance data of each color light to be actually displayed needs to be adjusted.
  • the embodiment of the present invention obtains the brightness value of each color to be displayed by performing gamma conversion on the input gray scale data of each color, and then calculates the white color by using the ratio of the corresponding color light in the pre-calculated white sub-pixel.
  • the luminance of the sub-pixel to be illuminated, and in the case where the sub-pixel corresponding to one of the colors is not illuminated, the luminance values of the sub-pixels corresponding to the other colors to be compensated are calculated, and finally the inverse gamma conversion is performed.
  • Other compensated color compensation data and white compensation data are calculated.
  • the brightness of the light of one color of the light emitted by the white sub-pixel exactly meets the brightness value requirement to be displayed, so that the corresponding sub-pixel of the color does not need to be illuminated.
  • the present invention calculates the insufficient portion of the light of the two colors, and the sub-corresponding to the other two colors The pixels emit light to compensate for the insufficient portion.
  • the adjusted brightness data of the white sub-pixel light obtained by the adjustment satisfies the following two conditions:
  • the brightness data of one of the color lights is a product of the adjusted brightness data of the white sub-pixel light and the proportion of the one color light of the white sub-pixel light;
  • the brightness data of the other color lights of the respective color lights is greater than the product of the corresponding brightness ratio of the adjusted brightness data of the white sub-pixel light and the corresponding color light of the white sub-pixel light.
  • the brightness data of one color light and the brightness data of the other kinds of color light are the data actually to be displayed received from the signal source, that is, the brightness data obtained by gamma conversion in step 101. .
  • the proportion of the respective color lights in the white sub-pixel light is obtained by actual measurement. That is, as described in the above step 301, the color coordinates of each color light and white sub-pixel light when the test screen is actually displayed on the display are calculated and calculated using the color coordinates.
  • step 102 the adjusted luminance data of the white sub-pixel light and the adjusted luminance data of each color light are adjusted by the following manner, as shown in FIG. 4:
  • Step 1021 Select one of the color lights as the current color light
  • Step 1022 Calculate the brightness adjustment data of the white sub-pixel light when the brightness data of the current color light is equal to the product of the adjusted brightness data of the white sub-pixel light and the ratio of the current color light corresponding to the white sub-pixel light;
  • Step 1023 Subtracting the calculated brightness data of the white sub-pixel light and the corresponding color light of the white sub-pixel light by using the brightness data of the other color lights other than the current color light. Calculating, by the product, an adjusted brightness value of the other color lights of the respective color lights except the current color light;
  • Step 1024 determining whether the adjusted brightness values of the other color lights other than the current color light are greater than zero; if yes, go to step 1025, otherwise go to step 1026;
  • Step 1025 The adjustment process ends, and the adjusted brightness data of the white sub-pixel light, the adjusted brightness data of the other color lights other than the current color light of each color light are output, and the current color light of each color light is output. Adjust the brightness data to zero;
  • Step 1026 Select another one of the color lights as the current color light, and then go to step 1022 to recalculate the adjusted brightness data of the white sub-pixel light and the adjusted brightness data of each color light.
  • the adjusted brightness data of the white sub-pixel light can be obtained by the following set of formulas:
  • R i is the luminance value of the red light
  • G i is the luminance value of the green light
  • B i is the luminance value of the blue light
  • L s is white
  • the adjusted brightness value of the sub-pixel light that is, the value that needs to be solved by the above equations
  • R s , G s , and B s are the ratios of red light, green light, and blue light in the white sub-pixel light, respectively. Measured and calculated.
  • the adjusted luminance value L s of the white sub-pixel light it is necessary to assume that the value of one of the equations in the equation (2) is equal to 0, and the values of the other two equations are greater than zero. For example, first select red light as the current color light, and obtain L s by assuming that the value of R i -R s L s is equal to 0, and if the value of L s is obtained such that G i -G s L s and B i If the value of -B s L s is greater than 0, then L s can be determined as the adjusted luminance value of white sub-pixel light, and G i -G s L s and B i -B s L s are green light and blue The brightness value of the color light is adjusted, and of course, the brightness value of the red light is adjusted to zero. Otherwise, green light and blue light are sequentially selected as the current color light, and the adjusted brightness value of the white sub-pixel light is recalculated.
  • the adjusted brightness value of each color light and white sub-pixel light can be obtained by the above method, wherein the adjusted brightness value of one color light is 0, and the adjusted brightness values of the other two color lights are corresponding to the brightness value minus white.
  • the product of the adjusted luminance value of the sub-pixel light and the proportion of the corresponding color light in the white sub-pixel light At the time of actual display, each of the sub-pixels and the white sub-pixels may be driven to emit light of a corresponding brightness according to the calculated adjusted luminance values of the respective color lights and the white sub-pixel light. This adjustment method can minimize power consumption because one of the sub-pixels does not emit light.
  • the gamma curve used for the conversion of the actual luminance values of the respective color lights is obtained by actually measuring the proportion of each color light in the white sub-pixel light, and achieving white balance between the mixed light of each color light and the white sub-pixel light. Time-adjusted, so that one of the color lights is directly obtained by the light emitted by the white sub-pixel, and the other two sub-pixels of the light emitted by the white sub-pixel are emitted by the other two sub-pixels, thus avoiding A color shift problem occurs.
  • step 103 the adjusted luminance values of the respective color lights and white sub-pixel lights are converted into gray scale data by a gamma curve, and then output and displayed.
  • each color light is mainly obtained by white light emitted by a white sub-pixel, and one of the sub-pixels corresponding to each color light is not It is required to emit light, and the corresponding color light is completely obtained by the white light emitted by the white sub-pixel, and the content of the other color light in the white light does not reach the brightness required for actual display, so the light emitted by the other sub-pixels is required to compensate. .
  • the sub-pixels corresponding to one color light do not emit light, and the other color sub-pixels emit light to calibrate the color coordinates of the white light.
  • the above method proposed by the present invention is simple in calculation method when adjusting display data, and can eliminate color shift.
  • FIG. 5 is a schematic diagram showing the frame of an image display control device of a WOLED display device proposed by the present invention. As shown in Figure 5, it includes:
  • the converting unit 501 is configured to convert gray scale data of each color light input by the signal source into brightness data of each color light;
  • the adjusting unit 502 is configured to obtain adjusted brightness data of the white sub-pixel light and adjusted brightness data of each color light according to the brightness data of each color light and the proportion of the corresponding color light in the white sub-pixel light;
  • the inverse conversion unit 503 is configured to convert the adjusted luminance data of the white sub-pixel light and the adjusted luminance data of each color light into gray scale data, and output and display;
  • the adjusted brightness data of the white sub-pixel light obtained by the adjusting unit satisfies the following two conditions:
  • the brightness data of one of the color lights is a product of the adjusted brightness data of the white sub-pixel light and the proportion of the one color light of the white sub-pixel light;
  • the luminance data of the other color light of the respective color lights is greater than the product of the adjusted luminance data of the white sub-pixel light and the corresponding proportion of the other color light corresponding to the white sub-pixel light.
  • the adjusting unit 502 may be configured to:
  • the adjusted brightness data of the white sub-pixel light is output, and the color light of each color is other than the current color light. Adjusting the brightness data of other kinds of color lights, and outputting the adjusted brightness data of the current color light in each color light is zero; otherwise, selecting the other of the color lights as the current color light, and repeating the above steps to The adjusted brightness data of the white sub-pixel light and the adjusted brightness data of each color light are recalculated.
  • the above image display control device in the embodiment of the present invention may be implemented by using a logic circuit such as an FPGA or other programmable circuit.
  • the image display control device further includes:
  • a gamma curve adjustment unit for adjusting a gamma curve of the respective color lights and white sub-pixel lights before image display control.
  • the gamma curve adjusting unit may be configured to:
  • the gamma curve of the white sub-pixel light is adjusted using the highest gray level luminance of the white sub-pixel light.
  • An embodiment of the present invention further provides a WOLED display device comprising the image display control device according to any of the above embodiments.
  • the image display control device and the WOLED display device provided by the embodiments of the present invention can make the brightness of the light of one color of the light emitted by the white sub-pixel exactly meet the brightness value requirement to be displayed, so the corresponding color of the color Pixels do not need to be illuminated, which minimizes power consumption. Meanwhile, since the brightness of the other color light in the light emitted by the white sub-pixel is smaller than the brightness value actually to be displayed, the embodiment of the present invention calculates the insufficient portion of the other color light and emits light from the sub-pixel corresponding to the other color. To compensate for the shortcomings to avoid color shift problems.
  • the above method and apparatus proposed by the embodiments of the present invention not only have a simple calculation method when adjusting display data, but also can reduce power consumption, and there is no color shift problem.
  • the present invention is not limited thereto.
  • the embodiment of the present invention can also be applied to sub-pixels of other colors such as red, green, blue, and yellow.
  • the display device In the display device.
  • a display device includes the image display control device of the above WOLED display device.

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Abstract

一种WOLED显示装置的图像显示控制方法及装置以及包括该装置的WOLED显示装置，在调整显示数据时计算方法简单，且能够消除色偏。方法包括：将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据（101）；根据各颜色光的亮度数据以及白色子像素光中对应各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据（102）；将白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据并输出、显示（103）。

Description

WOLED显示装置的图像显示控制方法及装置、显示装置
本申请要求于2014年10月23日递交中国专利局的、申请号为201410573406.9的中国专利申请的权益，该申请的全部公开内容以引用方式并入本文。
技术领域
本发明涉及图像显示技术领域，尤其涉及一种WOLED显示装置的图像显示控制方法及装置、显示装置。
背景技术
有源矩阵型有机发光二极管(AMOLED)作为下一代显示器因为其快速响应速度、高发光效率、高亮度和宽视角而引起很大的关注。有机发光二极管器件通过利用薄膜晶体管(TFT)控制在有机发光二极管(OLED)中流动的电流来显示图像。
通常的OLED器件有多个像素，每个像素包括用于全彩色显示的R(红色)子像素、G(绿色)子像素和B(蓝色)子像素。在R子像素形成用于产生红色光的R发光层，在G子像素形成用于产生绿色光的G发光层，并且在B子像素形成用于产生蓝色光的B发光层。通过使用金属掩模的精细金属掩模(FMM)方法等针对各个子像素独立地沉积发光层。但是，基板的尺寸越大，掩模弯曲越大。因而，使用FMM的常规沉积方法降低了产量，因为它难以精确地对发光层构图。结果，难以将该方法应用于大面积和高精度的显示器。
同样，近些年来，出现了使用白色OLED(WOLED)器件来实现彩色显示装置的技术，该技术在OLED器件的发光层形成期间不需要使用精细金属掩模(FMM)。该白色OLED具有其中R发光层、G发光层、B发光层等可选地层叠在阴极和阳极之间的结构，针对各个子像素形成白色OLED。该白光OLED显示器具有多个像素，每个像素包括针对彩色显示的R子像素、G子像素、B子像素和W(白色)子像素。R子像素包括R滤色器，该R滤色器用于透射从白色OLED入射的白色光中的红色光，G子像素包括G滤色器，该G滤色器用于透射从白色OLED入射的白色光中的绿色光，B子像素包括B滤色器，该B滤色器用于透射从白色OLED入射的白色光中的蓝色光。W子像素可不设置滤色器，并且透射从白色OLED入射的全部白色光以补偿由于滤色器引起的图像亮度的降低。
这种白色OLED显示器基于从外部输入的R数据、G数据和B数据来产生W数据，并利用所产生的W数据来调制后续输出的R数据、G数据和B数据。分别在W 子像素、R子像素、G子像素、B子像素中显示W数据、经调制的R数据、经调制的G数据和经调制的B数据。
发明内容
本发明的实施例提供了一种WOLED显示装置的图像显示控制方法，其包括：
将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据；
根据各颜色光的亮度数据以及白色子像素光中对应各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据；
将所述白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据并输出、显示；
其中，所得到的所述白色子像素光的调整亮度数据满足以下两个条件：
所述各颜色光中的一种颜色光的亮度数据为所述白色子像素光的调整亮度数据与白色子像素光中对应的该种颜色光的比例的乘积；
所述各颜色光中的其他种颜色光的亮度数据分别大于所述白色子像素光的调整亮度数据与白色子像素光中对应颜色光的比例的乘积。
在一实施例中，所述一种颜色光的调整亮度数据为0，所述其他种颜色光的调整亮度数据分别为所述其他种颜色光的亮度数据减去所述白色子像素光的调整亮度数据与白色子像素光中对应的所述其他种颜色光的比例的乘积。
在一实施例中，所述根据各颜色光的亮度数据以及白色子像素光中对应的各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据，包括：
选择所述各颜色光中的一种作为当前颜色光，计算在当前颜色光的亮度数据等于白色子像素光的调整亮度数据与白色子像素光中对应的所述当前颜色光的比例的乘积时，所述白色子像素光的调整亮度数据；
利用所述各颜色光中除当前颜色光之外的其他种颜色光的亮度数据减去计算得到的白色子像素光的调整亮度数据与白色子像素光中相应颜色光的比例的乘积，计算得到所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值；
判断计算得到的所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值是否均大于零；
如果所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值均大于零，则输出所述白色子像素光的调整亮度数据、各颜色光中除当前颜色光之外的其他种颜色光的调整亮度数据，并输出各颜色光中当前颜色光的调整亮度数据为零；否则，选择所述各颜色光中的另一种作为当前颜色光，并重复执行上述步骤，以重新计算白色子像素光的调整亮度数据以及各颜色光的调整亮度数据。
在一实施例中，所述白色子像素光中对应各颜色光的比例是通过测量白色子像素发出的光的色坐标以及所述各颜色子像素发出的光的色坐标得到的。
在一实施例中，所述将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据，以及所述将所述白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据，均通过各颜色光和白色子像素光的伽马曲线进行转换。
在一实施例中，在所述通过各颜色光和白色子像素光的伽马曲线进行转换之前还包括：预先调整所述各颜色光和白色子像素光的伽马曲线。
在一实施例中，所述预先调整所述各颜色光的伽马曲线包括：
测量显示器显示的测试画面中各颜色光的色坐标；
利用目标白光的色坐标以及测量得到的各颜色光的色坐标计算出目标白光中对应的各颜色光的比例；
利用目标白光的最高灰阶亮度数据以及目标白光中对应的各颜色光的比例确定各颜色光的最高灰阶亮度数据；
利用所述各颜色光的最高灰阶亮度数据，分别对应调整各颜色光的伽马曲线。
在一实施例中，所述预先调整所述白色子像素光的伽马曲线包括：
测量显示器显示的测试画面中各颜色光的色坐标和白色子像素光的色坐标，并利用所述各颜色光的色坐标和白色子像素光的色坐标计算得到白色子像素光中对应各颜色光的比例；
根据所述各颜色光的最高灰阶亮度值以及白色子像素光中对应各颜色光的比例确定白色子像素光的最高灰阶亮度；
利用所述白色子像素光的最高灰阶亮度调整白色子像素光的伽马曲线。
在一实施例中，所述白色子像素光的最高灰阶亮度满足以下两个条件：
所述各颜色光中的一种颜色光的最高灰阶亮度值为所述白色子像素光的最高灰阶亮度值与白色子像素光中对应的所述一种颜色光的比例的乘积；
所述各颜色光中的其他种颜色光的最高灰阶亮度值大于所述白色子像素光的最高灰阶亮度值与白色子像素光中对应的颜色光的比例的乘积。
在一实施例中，所述各颜色光的最高灰阶亮度值通过调整后的各颜色光的伽马曲线得到。
在一实施例中，所述各颜色包括红、绿、蓝三种颜色。
本发明的实施例还提供了一种WOLED显示装置的图像显示控制装置，其包括：
转换单元，用于将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据；
调整单元，用于根据各颜色光的亮度数据以及白色子像素光中对应的各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据；
逆转换单元，用于将所述白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据并输出、显示；
其中，所述调整单元得到的所述白色子像素光的调整亮度数据满足以下两个条件：
所述各颜色光中的一种颜色光的亮度数据为所述白色子像素光的调整亮度数据与白色子像素光中对应的所述一种颜色光的比例的乘积；
所述各颜色光中的其他种颜色光的亮度数据大于所述白色子像素光的调整亮度数据与白色子像素光中对应的所述其他种颜色光的比例的乘积。
在一实施例中，所述调整单元配置成：
选择所述各颜色光中的一种作为当前颜色光，计算在当前颜色光的亮度数据等于白色子像素光的调整亮度数据与白色子像素光中对应的所述当前颜色光的比例的乘积时，所述白色子像素光的调整亮度数据；
利用所述各颜色光中除当前颜色光之外的其他种颜色光的亮度数据减去计算得到的白色子像素光的调整亮度数据与白色子像素光中相应颜色光的比例的乘积，计算得到所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值；
判断计算得到的所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值是否均大于零；
如果所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值均大于零，则输出所述白色子像素光的调整亮度数据、各颜色光中除当前颜色光之外的其他种颜色光的调整亮度数据，并输出各颜色光中当前颜色光的调整亮度数据为零；否则，选择所述各颜色光中的另一种作为当前颜色光，并重复执行上述步骤，以重新计算白色子像素光的调整亮度数据以及各颜色光的调整亮度数据。
在一实施例中，该图像显示控制装置还包括：
伽马曲线调整单元，用于在图像显示控制之前调整所述各颜色光和白色子像素光的伽马曲线。
在一实施例中，所述伽马曲线调整单元配置成：
测量显示器显示的测试画面中各颜色光的色坐标和白色子像素光的色坐标，并利用各颜色光的色坐标和白色子像素光的色坐标计算得到白色子像素光中对应各颜色光的比例；
利用目标白光的色坐标以及测量得到的各颜色光的色坐标计算出目标白光中对应的各颜色光的比例；
利用目标白光的最高灰阶亮度数据以及目标白光中对应的各颜色光的比例确定各颜色光的最高灰阶亮度数据；
利用所述各颜色光的最高灰阶亮度数据，分别对应调整各颜色光的伽马曲线；
根据所述各颜色光的最高灰阶亮度值以及白色子像素光中对应的各颜色光的比例确定白色子像素光的最高灰阶亮度；
利用所述白色子像素光的最高灰阶亮度调整白色子像素光的伽马曲线。
本发明的实施例还提供了一种WOLED显示装置，其包括如上所述的图像显示控制装置。
附图说明
图1是本发明中WOLED显示装置的图像显示控制方法流程图；
图2是本发明中调整各颜色光的伽马曲线的方法流程图；
图3是本发明中调整白色子像素光的伽马曲线的方法流程图；
图4是本发明中调整得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据的方法流程图；
图5是本发明中WOLED显示装置的图像显示控制装置的框架示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明作进一步的详细说明。
本发明的实施例提出的一种WOLED显示装置的图像显示控制方法，主要是根据从信号源输入的待显示图像中的各颜色光数据(如RGB数据)中的亮度值计算得到各颜色光的调整亮度值以及白色子像素光的调整亮度值，使得在白色子像素发出相应白光的基础上，各颜色光对应的子像素中的部分子像素进行发光，以补偿相应颜色的光。
下面根据附图说明根据本发明的多个实施例。在下面的详细描述中，为便于解释，阐述了许多具体的细节以提供对本披露实施例的全面理解。然而明显地，一个或多个实施例在没有这些具体细节的情况下也可以被实施。在其他情况下，公知的结构和装置以图示的方式体现以简化附图。
图1示出了本发明提出的一种WOLED显示装置的图像显示控制方法流程图。如图1所示，其包括：
步骤101：将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据；
步骤102：根据各颜色光的亮度数据以及白色子像素光中对应的各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据；
步骤103：将所述白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据并输出、显示；
其中，所得到的所述白色子像素光的调整亮度数据满足以下两个条件：
所述各颜色光中的一种颜色光的亮度数据为所述白色子像素光的调整亮度数据与白色子像素光中对应的所述一种颜色光的比例的乘积；
所述各颜色光中的其他种颜色光的亮度数据分别大于所述白色子像素光的调整亮度数据与白色子像素光中对应的颜色光的比例的乘积。
下面根据具体的实现方式详细介绍本发明提出的上述方法的各个步骤的细节。
在显示器上显示当前图像帧之前，首先从信号源获取待显示的当前图像帧的显示数据。所述显示数据通常为RGB数据，其包括各颜色光如RGB的灰阶数据。
步骤101中，将所述RGB数据中的灰阶数据转换成RGB的亮度数据。所述转换通常采用伽马曲线进行转换。
所述伽马曲线用于表示相应的颜色光在不同灰阶下的显示亮度。目前最常采用的是伽马曲线2.2，即相应灰阶的显示亮度值为所述灰阶的2.2次幂。
作为示例，本发明的实施例中的步骤101中进行灰阶转换所采用的各颜色光的伽马曲线是预先对标准的伽马曲线2.2进行了调整后的伽马曲线。当然，本发明中也可以使用其他伽马曲线，如伽马曲线1、2.5等，具体根据实际情况进行选择。
可选地，可以在显示器出厂之前对其显示画面进行测试，并调整得到相应的伽马曲线。具体调整过程见图2所示。
如图2所示，调整各颜色光的伽马曲线的具体方法步骤包括：
步骤201：测量显示器显示的测试画面中各颜色光的色坐标；
该步骤可以是通过在显示器中分别显示一幅各颜色(如RGB)的单色画面，然后利用测量仪器在显示器的出光侧测量显示所述测试画面时各颜色光的色坐标。
步骤202：利用目标白光的色坐标以及测量得到的各颜色光的色坐标计算得到目标白光中各颜色光的显示比例；
该步骤中，所述目标白光是预先设定的白平衡下目标色坐标对应的白光。因此，通过计算目标白光中各颜色光的显示比例就可以确定在理想情况下各颜色光的参数，如最高灰阶亮度值等。
步骤203：利用在目标白光中各颜色光的显示比例以及目标白光的最高灰阶亮度值调整各颜色光的伽马曲线。
该步骤中，根据白平衡后目标白光中各颜色光的显示比例，当目标白光的亮度值为最高灰阶亮度值时，计算得到的也是各颜色光的最高灰阶亮度值，然后根据所述各颜色光的最高灰阶亮度值调整确定好的标准的伽马曲线。其中，所述标准的伽马曲线为根据实际情况预先确定的伽马曲线，如伽马曲线2.2等。伽马曲线的具体调整方法属于本领域中的公知技术，在此不再详述。
经过上述步骤，各颜色光的伽马曲线通过目标白光而调整完成，在具体图像显示控制过程中，当接收到信号源输入的各颜色光的灰阶数据时，就可以根据调整后的伽马曲线将灰阶数据转换成亮度数据。
由于本发明针对的是WOLED显示装置，显示过程中还需要白色子像素光的伽马曲线。因此在调整各颜色光的伽马曲线的同时，本发明还需要调整白色子像素光的伽马曲线。具体调整过程见图3所示。
如图3所示，调整白色子像素光的伽马曲线的具体方法步骤包括：
步骤301：测量显示器显示的测试画面中各颜色光的色坐标和白色子像素光的色坐标，并利用所述白色子像素光的色坐标和各颜色光的色坐标计算得到白色子像素光中对应的各颜色光的比例；
该步骤与上面步骤201一样，都是采用测量仪器在显示器的出光侧进行测量，可以通过单独显示一幅白色画面来测量白色子像素发出的光的色坐标，即可得到白色子像素光的色坐标；相应地，通过单独显示其他各颜色(如红、绿、蓝等)画面来测试其他各颜色子像素发出的光的色坐标，即得到各颜色光的色坐标。之后，再利用测量得到的白色子像素光的色坐标和各颜色子像素光的色坐标，得到白色子像素发出的光中对应的各颜色光的比例。本发明实施例中，白色子像素光中对应各颜色光的比例指的是，白色子像素发出的光中对应的各颜色光所占白色子像素光的比例。根据光谱学原理，通常白光可由诸如红绿蓝等各颜色光按一定比例混合而成，例如某一灰阶的白光可以由0.33的红光，0.33的绿光，0.34的蓝光组成，这时，白色子像素中对应各颜色光(红绿蓝)的比例分别为0.33、0.33、0.34。当然，该步骤和步骤201可以同时进行。在WOLED显示装置中，各颜色光是通过对白色子像素发出的白光进行滤光得到的，而白色子像素光则是未经过滤光得到的。
步骤302：根据所述各颜色光的最高灰阶亮度值以及白色子像素光中对应各颜色光的比例确定白色子像素光的最高灰阶亮度值；
由于各颜色光的伽马曲线已经调整得到，因此所述各颜色光的最高灰阶亮度值可以根据所述伽马曲线获得。而需要确定的所述白色子像素光的最高灰阶亮度值需要满足以下两个条件：
所述各颜色光中的一种颜色光的最高灰阶亮度值为所述白色子像素光的最高灰阶亮度值与白色子像素光中所述一种颜色光的比例的乘积；
所述各颜色光中的其他种颜色光的最高灰阶亮度值分别大于所述白色子像素光的最高灰阶亮度值与白色子像素光中对应的颜色光的比例的乘积。
在WOLED显示装置中，各颜色光是通过对白光进行相应的滤光片滤光得到的，例如红色光是通过红色滤光片滤除白光中除红色光以外的其他颜色光后得到的。此外，WOLED显示装置，还包括一个白色子像素，其直接输出白光，而不需要滤光片对其 进行滤光。因此，在显示器最终显示画面时，为保证各颜色光的亮度值能够达到实际需要的亮度值，本发明中通过在白色子像素发出白光的基础上，利用其他颜色光对应的子像素发出的光进行补偿来解决色偏问题。
因此，本发明实施例中白色子像素光的最高灰阶亮度值通过上述两个条件来获得。具体地，使得各颜色光中的一种颜色光的最高灰阶亮度值与白色子像素光中该颜色光所占的比例的亮度值一致，这样在实际显示画面时，白色子像素光中该种颜色光所占比例正好符合实际要显示的数据，因此对应这种颜色光的子像素不需要进行发光，而直接由白色子像素发出的光获得；同时，其他颜色光的亮度值除了白色子像素光中获取的部分外，还需要其他颜色光对应的子像素进行发光来补偿不足部分，因此需要使得其他颜色光在白色子像素光中所占的比例小于实际要显示的颜色数据。
基于上述描述，以RGB三种颜色光为例，所述白色子像素光的最高灰阶亮度可以通过下面一组公式得到：
Figure PCTCN2015092422-appb-000001
其中，Rmax为红色光的最高灰阶亮度值，Gmax为绿色光的最高灰阶亮度值，Bmax为蓝色光的最高灰阶亮度值，Lsmax为白色子像素光的最高灰阶亮度值；Rs、Gs、Bs分别为白色子像素光中红色光、绿色光和蓝色光所占的比例，这个由步骤301计算得到。
为了获得白色子像素光的最高灰阶亮度值Lsmax，需要假设上述一组公式中一个公式的值等于0，而其他两个公式的值大于0来实现。例如，先通过假设Rmax-RsLsmax的值等于0求得Lsmax，且求得的Lsmax的值使得Gmax-GsLsmax和Bmax-BsLsmax的值均大于0，那么该Lsmax就可以确定为白色子像素光的最高灰阶亮度值。
步骤303：利用所述白色子像素光的最高灰阶亮度调整白色子像素光的伽马曲线。
在得到白色子像素光的最高灰阶亮度值后，可以根据常用的伽马曲线调整方式对预先确定的标准伽马曲线进行调整。
步骤101中将实际要进行显示的各颜色光的灰阶数据转换成了亮度数据，步骤102中则需要对实际要进行显示的各颜色光的亮度数据进行调整。
可见，本发明的实施例通过将输入的各颜色灰阶数据进行伽玛转换，得到要显示的各颜色的亮度值，然后利用预计算的白色子像素中对应的各颜色光的比例来计算白 色子像素所要发光的亮度，并在保证其中一种颜色对应的子像素不发光的情况下，计算出要进行补偿的其他各颜色对应的子像素的亮度值，最后进行逆伽玛转换，得到经补偿的其他各颜色补偿数据和白色补偿数据。上述方法中，白色子像素发出的光中一种颜色的光的亮度正好符合实际要显示的亮度值要求，因此该种颜色的对应的子像素不需要进行发光。同时，由于白色子像素发出的光中其他两种颜色光的亮度小于实际要显示的亮度值，因此本发明通过计算这两种颜色光的不足部分，并由所述其他两种颜色对应的子像素发光来补偿所述不足部分。
具体地，调整得到的所述白色子像素光的调整亮度数据满足以下两个条件：
所述各颜色光中的一种颜色光的亮度数据为所述白色子像素光的调整亮度数据与白色子像素光中所述一种颜色光所占比例的乘积；
所述各颜色光中的其他几种颜色光的亮度数据大于后所述白色子像素光的调整亮度数据与白色子像素光中对应的颜色光所占相应比例的乘积。
其中，所述各颜色光中一种颜色光的亮度数据和其他种颜色光的亮度数据就是从信号源接收到的实际要进行显示的数据，即是步骤101中通过伽马转换得到的亮度数据。
所述各颜色光在白色子像素光中所占比例是通过实际测量获得。即如上步骤301中所描述，是通过实际测量显示器显示测试画面时各颜色光和白色子像素光的色坐标，并利用色坐标计算得到的。
具体地，步骤102中通过如下方式调整得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据，具体参见图4：
步骤1021：选择所述各颜色光中的一种作为当前颜色光；
步骤1022：计算在当前颜色光的亮度数据等于白色子像素光的调整亮度数据与白色子像素光中对应的所述当前颜色光的比例的乘积时，所述白色子像素光的调整亮度数据；
步骤1023：利用所述各颜色光中除当前颜色光之外的其他种颜色光的亮度数据减去计算得到的白色子像素光的调整亮度数据与白色子像素光中相应的颜色光的比例的乘积，计算得到所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值；
步骤1024：判断计算得到的所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值是否均大于零；如果是，则转步骤1025，否则转步骤1026；
步骤1025：调整过程结束，并输出所述白色子像素光的调整亮度数据、各颜色光中除当前颜色光之外的其他种颜色光的调整亮度数据，并输出各颜色光中当前颜色光的调整亮度数据为零；
步骤1026：选择所述各颜色光中的另一种作为当前颜色光，并转步骤1022，以重新计算得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据。
基于上述条件，以RGB三种颜色光为例，所述白色子像素光的调整亮度数据可以通过下面一组公式得到：
Figure PCTCN2015092422-appb-000002
其中，Ri为红色光的亮度值，Gi为绿色光的亮度值，Bi为蓝色光的亮度值，这些亮度值都是根据实际要显示的灰阶数据转换得到的；Ls为白色子像素光的调整亮度值，即通过上述方程组需要进行求解的值；Rs、Gs、Bs分别为白色子像素光中红色光、绿色光和蓝色光所占的比例，这个通过实际测量以及计算得到的。
为了获得白色子像素光的调整亮度值Ls，需要假设方程组(2)中的其中一个公式的值等于0，而其他两个公式的值大于0来实现。例如，先选择红色光作为当前颜色光，并通过假设Ri-RsLs的值等于0求得Ls，且如果求得的Ls的值使得Gi-GsLs和Bi-BsLs的值均大于0，那么该Ls就可以确定为白色子像素光的调整亮度值，而Gi-GsLs和Bi-BsLs即为绿色光和蓝色光的调整亮度值，当然红色光的调整亮度值为0。否则，依次选择绿色光和蓝色光作为当前颜色光，重新计算白色子像素光的调整亮度值。
通过上述方式就可以得到各颜色光和白色子像素光的调整亮度值，其中一种颜色光的调整亮度值为0，而其他两种颜色光的调整亮度值为其相应的亮度值减去白色子像素光的调整亮度值与相应颜色光在白色子像素光中所占比例的乘积。在实际显示时，根据计算得到的各颜色光和白色子像素光的调整亮度值驱动各个子像素和白色子像素发出相应亮度的光即可。这种调整方式，由于其中一种子像素不发光，可以最大程度的降低功耗。同时，由于各颜色光的实际亮度值的转换所采用的伽马曲线是通过实际测量各颜色光在白色子像素光中的比例、且在各颜色光与白色子像素光的混合光达到白平衡时调整得到的，因此在其中一种颜色光直接由白色子像素发出的光获得，而在白色子像素发出的光中其他两种颜色光的不足部分才由其他两种子像素发出，这样可以避免产生色偏问题。
步骤103中，利用伽马曲线将上述各颜色光和白色子像素光的调整亮度值转换成灰阶数据后进行输出、显示。
通过本发明提出的上述方法进行调整后，对于WOLED显示装置，其中各颜色光主要由白色子像素发出的白光获得，而各颜色光对应的子像素中，其中一种子像素不 需要进行发光，其对应的颜色光完全由白色子像素发出的白光获得，而白光中其他颜色光的含量由于达不到实际需要进行显示的亮度，因此需要相应的其他子像素发出的光来补偿。
本发明提出的图像显示控制方法中，实际显示的时候白色子像素发光的基础上，其中一种颜色光对应的子像素不发光，而其他颜色子像素进行发光，以校准白光的色坐标。本发明提出的上述方法在调整显示数据时计算方法简单，且能够消除色偏。
图5示出了本发明提出的一种WOLED显示装置的图像显示控制装置的框架示意图。如图5所示，其包括：
转换单元501，用于将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据；
调整单元502，用于根据各颜色光的亮度数据以及白色子像素光中对应各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据；
逆转换单元503，用于将所述白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据并输出、显示；
其中，所述调整单元得到的所述白色子像素光的调整亮度数据满足以下两个条件：
所述各颜色光中的一种颜色光的亮度数据为所述白色子像素光的调整亮度数据与白色子像素光中所述一种颜色光所占比例的乘积；
所述各颜色光中的其他种颜色光的亮度数据大于所述白色子像素光的调整亮度数据与白色子像素光中对应的所述其他种颜色光所占相应比例的乘积。
为了得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据，作为示例，所述调整单元502可以配置成：
选择所述各颜色光中的一种作为当前颜色光，计算在当前颜色光的亮度数据等于白色子像素光的调整亮度数据与白色子像素光中对应的所述当前颜色光的比例的乘积时，所述白色子像素光的调整亮度数据；
利用所述各颜色光中除当前颜色光之外的其他种颜色光的亮度数据减去计算得到的白色子像素光的调整亮度数据与白色子像素光中相应颜色光的比例的乘积，计算得到所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值；
判断计算得到的所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值是否均大于零；
如果所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值均大于零，则输出所述白色子像素光的调整亮度数据、各颜色光中除当前颜色光之外的其他种颜色光的调整亮度数据，并输出各颜色光中当前颜色光的调整亮度数据为零；否则，选择所述各颜色光中的另一种作为当前颜色光，并重复执行上述步骤，以重新计算白色子像素光的调整亮度数据以及各颜色光的调整亮度数据。
本发明的实施例中上述图像显示控制装置可以利用逻辑电路来实现，如FPGA或其他可编程电路。
作为示例，所述图像显示控制装置，还包括：
伽马曲线调整单元，用于在图像显示控制之前调整所述各颜色光和白色子像素光的伽马曲线。
作为示例，为了调整所述各颜色光和白色子像素光的伽马曲线，所述伽马曲线调整单元可以配置成：
测量显示器显示的测试画面中各颜色光的色坐标和白色子像素光的色坐标，并利用各颜色光的色坐标和白色子像素光的色坐标计算得到白色子像素光中对应各颜色光的比例；
利用目标白光的色坐标以及测量得到的各颜色光的色坐标计算出目标白光中对应各颜色光的比例；
利用目标白光的最高灰阶亮度数据以及目标白光中对应各颜色光的比例确定各颜色光的最高灰阶亮度数据；
利用所述各颜色光的最高灰阶亮度数据，分别对应调整各颜色光的伽马曲线；
根据所述各颜色光的最高灰阶亮度值以及白色子像素光中对应各颜色光的比例确定白色子像素光的最高灰阶亮度；
利用所述白色子像素光的最高灰阶亮度调整白色子像素光的伽马曲线。
本发明的实施例还提供了一种WOLED显示装置，其包括如上述任一实施例所述的图像显示控制装置。
通过本发明实施例提出的上述图像显示控制装置及WOLED显示装置，能够使白色子像素发出的光中一种颜色的光的亮度正好符合实际要显示的亮度值要求，因此该种颜色对应的子像素不需要进行发光，可以最大程度的降低功耗。同时，由于白色子像素发出的光中其他颜色光的亮度小于实际要显示的亮度值，因此本发明的实施例通过计算该其他颜色光的不足部分，并由所述其他颜色对应的子像素发光来补偿所述不足部分，以避免产生色偏问题。
因此，本发明实施例提出的上述方法和装置在调整显示数据时不但计算方法简单，能够降低功耗，且不存在色偏问题。
虽然本发明的上述实施例以RGB三种子像素为例进行介绍，但本发明不限于此，例如，本发明的实施例也可以用于诸如红、绿、蓝、黄等其他种颜色的子像素的显示装置中。
本发明中的图像显示控制装置中各个单元具体实现的功能与上述图显示控制方法中描述的基本一致，具体细节可参见对方法的描述，在此不再详述。
本发明提出的一种显示装置，该显示装置包括上述一种WOLED显示装置的图像显示控制装置。
以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (16)

  1. 一种WOLED显示装置的图像显示控制方法，其包括：
    将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据；
    根据各颜色光的亮度数据以及白色子像素光中对应各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据；
    将所述白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据并输出、显示；
    其中，所得到的所述白色子像素光的调整亮度数据满足以下两个条件：
    所述各颜色光中的一种颜色光的亮度数据为所述白色子像素光的调整亮度数据与白色子像素光中对应的该种颜色光的比例的乘积；
    所述各颜色光中的其他种颜色光的亮度数据分别大于所述白色子像素光的调整亮度数据与白色子像素光中相应颜色光的比例的乘积。
  2. 如权利要求1所述的方法，其中，所述一种颜色光的调整亮度数据为0，所述其他种颜色光的调整亮度数据分别为所述其他种颜色光的亮度数据减去所述白色子像素光的调整亮度数据与白色子像素光中对应的所述其他种颜色光的比例的乘积。
  3. 如权利要求1所述的方法，其中，所述根据各颜色光的亮度数据以及白色子像素光中对应的各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据，包括：
    选择所述各颜色光中的一种作为当前颜色光，计算在当前颜色光的亮度数据等于白色子像素光的调整亮度数据与白色子像素光中对应的所述当前颜色光的比例的乘积时，所述白色子像素光的调整亮度数据；
    利用所述各颜色光中除当前颜色光之外的其他种颜色光的亮度数据减去计算得到的白色子像素光的调整亮度数据与白色子像素光中相应颜色光的比例的乘积，计算得到所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值；
    判断计算得到的所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值是否均大于零；
    如果所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值均大于零，则输出所述白色子像素光的调整亮度数据、各颜色光中除当前颜色光之外的其他种颜色光的调整亮度数据，并输出各颜色光中当前颜色光的调整亮度数据为零；否则，选择所述各颜色光中的另一种作为当前颜色光，并重复执行上述步骤，以重新计算白色子像素光的调整亮度数据以及各颜色光的调整亮度数据。
  4. 如权利要求1-3任一项所述的方法，其中，所述白色子像素光中对应各颜色光的比例是通过测量白色子像素发出的光的色坐标以及所述各颜色子像素发出的光的色坐标得到的。
  5. 如权利要求1所述的方法，其中，所述将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据，以及所述将所述白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据，均通过各颜色光和白色子像素光的伽马曲线进行转换。
  6. 如权利要求5所述的方法，其中，在所述通过各颜色光和白色子像素光的伽马曲线进行转换之前还包括：预先调整所述各颜色光和白色子像素光的伽马曲线。
  7. 如权利要求6所述的方法，其中，所述预先调整所述各颜色光的伽马曲线，包括：
    测量显示器显示的测试画面中各颜色光的色坐标；
    利用目标白光的色坐标以及测量得到的各颜色光的色坐标计算出目标白光中对应的各颜色光的比例；
    利用目标白光的最高灰阶亮度数据以及目标白光中对应的各颜色光的比例确定各颜色光的最高灰阶亮度数据；
    利用所述各颜色光的最高灰阶亮度数据，分别对应调整各颜色光的伽马曲线。
  8. 如权利要求6所述的方法，其中，所述预先调整所述白色子像素光的伽马曲线，包括：
    测量显示器显示的测试画面中各颜色光的色坐标和白色子像素光的色坐标，并利用所述各颜色光的色坐标和白色子像素光的色坐标计算得到白色子像素光中对应各颜色光的比例；
    根据所述各颜色光的最高灰阶亮度值以及白色子像素光中对应各颜色光的比例确定白色子像素光的最高灰阶亮度；
    利用所述白色子像素光的最高灰阶亮度调整白色子像素光的伽马曲线。
  9. 如权利要求8所述的方法，其中，所述白色子像素光的最高灰阶亮度满足以下两个条件：
    所述各颜色光中的一种颜色光的最高灰阶亮度值为所述白色子像素光的最高灰阶亮度值与白色子像素光中对应的所述一种颜色光的比例的乘积；
    所述各颜色光中的其他种颜色光的最高灰阶亮度值分别大于所述白色子像素光的最高灰阶亮度值与白色子像素光中对应的颜色光的比例的乘积。
  10. 如权利要求9所述的方法，其中，所述各颜色光的最高灰阶亮度值通过调整后的各颜色光的伽马曲线得到。
  11. 如权利要求1-3、5-10任一项所述的方法，其中，所述各颜色包括红、绿、蓝三种颜色。
  12. 一种WOLED显示装置的图像显示控制装置，其包括：
    转换单元，用于将信号源输入的各颜色光的灰阶数据转换成各颜色光的亮度数据；
    调整单元，用于根据各颜色光的亮度数据以及白色子像素光中对应的各颜色光的比例得到白色子像素光的调整亮度数据以及各颜色光的调整亮度数据；
    逆转换单元，用于将所述白色子像素光的调整亮度数据和各颜色光的调整亮度数据转换成灰阶数据并输出、显示；
    其中，所述调整单元得到的所述白色子像素光的调整亮度数据满足以下两个条件：
    所述各颜色光中的一种颜色光的亮度数据为所述白色子像素光的调整亮度数据与白色子像素光中对应的所述一种颜色光的比例的乘积；
    所述各颜色光中的其他种颜色光的亮度数据分别大于所述白色子像素光的调整亮度数据与白色子像素光中相应的所述其他种颜色光的比例的乘积。
  13. 如权利要求12所述的图像显示控制装置，其中，所述调整单元配置成：
    选择所述各颜色光中的一种作为当前颜色光，计算在当前颜色光的亮度数据等于白色子像素光的调整亮度数据与白色子像素光中对应的所述当前颜色光的比例的乘积时，所述白色子像素光的调整亮度数据；
    利用所述各颜色光中除当前颜色光之外的其他种颜色光的亮度数据减去计算得到的白色子像素光的调整亮度数据与白色子像素光中相应颜色光的比例的乘积，计算得到所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值；
    判断计算得到的所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值是否均大于零；
    如果所述各颜色光中除当前颜色光之外的其他种颜色光的调整亮度值均大于零，则输出所述白色子像素光的调整亮度数据、各颜色光中除当前颜色光之外的其他种颜色光的调整亮度数据，并输出各颜色光中当前颜色光的调整亮度数据为零；否则，选择所述各颜色光中的另一种作为当前颜色光，并重复执行上述步骤，以重新计算白色子像素光的调整亮度数据以及各颜色光的调整亮度数据。
  14. 如权利要求12所述的图像显示控制装置，其还包括：
    伽马曲线调整单元，用于在图像显示控制之前调整所述各颜色光和白色子像素光的伽马曲线。
  15. 如权利要求14所述的图像显示控制装置，其中，所述伽马曲线调整单元配置成：
    测量显示器显示的测试画面中各颜色光的色坐标和白色子像素光的色坐标，并利用各颜色光的色坐标和白色子像素光的色坐标计算得到白色子像素光中对应各颜色光的比例；
    利用目标白光的色坐标以及测量得到的各颜色光的色坐标计算出目标白光中对应的各颜色光的比例；
    利用目标白光的最高灰阶亮度数据以及目标白光中对应的各颜色光的比例确定各颜色光的最高灰阶亮度数据；
    利用所述各颜色光的最高灰阶亮度数据，分别对应调整各颜色光的伽马曲线；
    根据所述各颜色光的最高灰阶亮度值以及白色子像素光中对应的各颜色光的比例确定白色子像素光的最高灰阶亮度；
    利用所述白色子像素光的最高灰阶亮度调整白色子像素光的伽马曲线。
  16. 一种WOLED显示装置，其包括如权利要求12-15任一项所述的图像显示控制装置。
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