JP2016505884A5 - - Google Patents

Claims (47)

In a method for generating a color image using a display device comprising pixels comprising subpixels of primary colors of red, green and blue,
a. By changing the primary colors of the display device, by changing the color gamut of the display device, the step of increasing the brightness of the image with respect to a reference level,
b. Reducing power to the display device to reduce the brightness of the image;
c. Restoring the color of the image to approximately the reference level by modifying the image pixel data using a three-dimensional lookup table to generate output image pixel data;
d. For generating the color image, and Nde including a step of transmitting the output image pixel data to the display device,
The method of reducing power to the display device reduces the brightness of the image to a level brighter than the reference level .   The method of claim 1 further comprising adding white to the image to reduce the color gamut and increase the brightness of the image.   The method of claim 2, wherein white is added by white sub-pixels.   3. The method of claim 2, wherein white is added to at least one of the primary color sub-pixels.   3. The method of claim 2, wherein white is added to two of the three primary color sub-pixels.   3. The method of claim 2, wherein white is added to the three primary color subpixels.   7. The method of claim 6, wherein white is added to the three primary color sub-pixels in different amounts.   7. The method of claim 6, wherein white is adaptively added according to an algorithm in which the amount of white addition decreases with increasing saturation.   9. The method of claim 8, wherein the algorithm in which the amount of white addition decreases with increasing saturation includes a Gaussian function that defines a decrease in white with increasing saturation.   9. The method of claim 8, wherein the algorithm is used to determine a value for the three-dimensional lookup table. 9. The method of claim 8, wherein a plurality of images are generated using the display device, and the algorithm determines the amount of white to add to each image pixel and the amount of power reduction for each image pixel. A method comprising the step of:   9. The method of claim 8, wherein the algorithm includes determining the amount of white added to each individual pixel.   13. The method of claim 12, wherein the algorithm includes determining the amount of white added to each of the individual red, green and blue primary color sub-pixels.   3. The method of claim 2, wherein white is added to the subpixel during a portion of the pixel exposure time.   3. The method of claim 2, wherein white is added from a second source different from the first source that provides the red, green and blue primary color sub-pixels. 16. The method of claim 15, wherein the display device is an LCD display device comprising a first backlight as the first source and a second backlight as the second source. Feature method. 3. The method of claim 2, wherein the display device is an LCD display device and the white is added to each pixel by a white sub-pixel. 2. The method of claim 1, wherein the display device is one of an LCD display device , an LED display device , an OLED display device , a plasma display device, and a DMD projector. The method of claim 1, the step of reducing the power to the display device, wherein the reducing the luminance of the image approximate to the reference level. The method of claim 1, wherein a memory color is retained in the color image. The method of claim 1, wherein restoring the color of the image comprises correcting a white point of the display device to a white point of a color standard. The method of claim 1, wherein the step of recovering the color of the image is performed in an IPT uniform hue color space. The method of claim 1, wherein the value of the three-dimensional lookup table is determined by using a visual model of the human visual system. 24. The method of claim 23, wherein the value of the three-dimensional lookup table is determined by using color adaptation of the human visual system. In a method for generating a color image using a display device comprising pixels comprising subpixels of primary colors of red, green and blue,
a. Increasing the brightness of the image relative to a reference level and reducing saturation by adding white to the image pixel;
b. Reducing power to the display device to reduce the brightness of the image;
c. Restoring the saturation of the image to approximately the reference level by modifying the image pixel data using a three-dimensional lookup table to generate output image pixel data;
d. Transmitting the output image pixel data to the display device to generate the color image;
Contains
The method of reducing power to the display device reduces the brightness of the image to a level brighter than the reference level. 26. The method of claim 25, wherein white is added by white subpixels. 26. The method of claim 25, wherein white is added to at least one of the primary color sub-pixels. 26. The method of claim 25, wherein white is added to two of the three primary color sub-pixels. 26. The method of claim 25, wherein white is added to the three primary color subpixels. 30. The method of claim 29, wherein white is added to the three primary color sub-pixels in different amounts. 30. The method of claim 29, wherein white is adaptively added according to an algorithm in which the amount of white addition decreases with increasing saturation. 32. The method of claim 31, wherein the algorithm in which the amount of white addition decreases with increasing saturation includes a Gaussian function that defines a decrease in white with increasing saturation. 32. The method of claim 31, wherein the algorithm is used to determine a value for the three-dimensional lookup table. 32. The method of claim 31, wherein a plurality of images are generated using the display device, and the algorithm determines the amount of white to add to each image pixel and the amount of power reduction for each image. A method comprising the steps. 32. The method of claim 31, wherein the algorithm includes determining the amount of white added to each individual pixel. 36. The method of claim 35, wherein the algorithm includes determining the amount of white added to each of the individual red, green and blue primary color sub-pixels. 26. The method of claim 25, wherein white is added to the subpixel during a portion of a pixel exposure time. 26. The method of claim 25, wherein white is added from a second source separate from the first source that provides the red, green, and blue primary color sub-pixels. 40. The method of claim 38, wherein the display device is an LCD display device comprising a first backlight as the first source and a second backlight as the second source. Feature method. 26. The method of claim 25, wherein the display device is an LCD display device, and the white is added to each pixel by a white sub-pixel. 26. The method of claim 25, wherein the display device is one of an LCD display device, an LED display device, an OLED display device, a plasma display device, and a DMD projector. 26. The method of claim 25, wherein reducing power to the display device reduces the brightness of the image to approximately the reference level. 26. The method of claim 25, wherein the step of restoring the color of the image is performed in an IPT uniform hue color space. 26. The method of claim 25, wherein the value of the three-dimensional lookup table is determined by using a visual model of the human visual system. 45. The method of claim 44, wherein the value of the three-dimensional lookup table is determined by using color adaptation of the human visual system. 26. The method of claim 25, wherein a memory color is retained in the color image. 26. The method of claim 25, wherein restoring the color of the image includes correcting a white point of the display device to a color standard white point.