Multiple primary color conversion method, driving method, driving device and display apparatus

A driving method for driving a display panel to display an image to be displayed, wherein the display panel comprises a plurality of display pixels, each of the display pixels comprises l display sub-pixels having different colors, wherein, the driving method comprises:

• acquiring color information of a target color of each of image pixels in the image to be displayed;
• computing grayscales of l display sub-pixels in a corresponding display pixel on the display panel according to the color information of the target color of each of image pixels, using a multiple primary color conversion method, wherein in the display pixel, each display sub-pixel corresponds to a color;
• and
• driving the display panel to display according to the grayscales of l display sub-pixels in each of the display pixels, wherein
• the multiple primary color conversion method, for computing grayscales of l primary colors of a target color in an l-primary-color color gamut space according to color information of the target color, wherein l is a positive integer greater than 3, the color information of the target color comprises color coordinates of the target color and a brightness of the target color, wherein, the multiple primary color conversion method comprises:
• in step S110, determining at least one color triangle corresponding to the target color in an l-primary-color system chromaticity diagram according to the color coordinates of the target color;
• in step S120, computing grayscale components of l primary colors corresponding to the target color in each of the at least one color triangle according to the color coordinates of the target color and an initial brightness component, wherein the initial brightness component is computed according to the following equation:
• Y0=Y/n, where Y0 is the initial brightness component, Y is the brightness of the target color, and n is the number of the at least one color triangle corresponding to the target color;
• in step S130, adding up grayscale components of each same primary color respectively in the at least one color triangle corresponding to the target color, to obtain initial grayscales of l primary colors;
• in step S140, judging whether there is an overflow grayscale in the initial grayscales of l primary colors, wherein the overflow grayscale is an initial grayscale whose grayscale value is greater than a grayscale threshold;
• if there is no overflow grayscale in the initial grayscales of l primary colors, then performing step S160, if there is an overflow grayscale in the initial grayscales of l primary colors, then performing step S150;
• in step S150, reducing the initial brightness component corresponding to at least one of grayscale components greater than a grayscale component threshold among grayscale components of same primary color as the overflow grayscale, and adjusting initial brightness component, corresponding to other grayscale components of the same primary color as the overflow grayscale, wherein, a sum of all adjusted initial brightness components and all unadjusted initial brightness components is the brightness of the target color, computing grayscale components of l primary colors in color triangles including the primary color of the overflow grayscale according to the color coordinates of the target color and the adjusted initial brightness components, and performing steps S130 and S140;
• in step S160, determining the initial grayscales of l primary colors as grayscales of l primary colors of the target color in the l-primary-color color gamut space.

A driving device for driving a display panel, wherein the display panel comprises a plurality of display pixels, each of the display pixels comprises l display sub-pixels having different colors, wherein, the driving device comprises at least one processor and a memory for storing at least one program;

• wherein, the at least one program, when executed by the at least one processor, causes the at least one processor to perform a driving method,
• wherein the driving method comprises:
• acquiring color information of a target color of each of image pixels in the image to be displayed;
• computing grayscales of l display sub-pixels in a corresponding display pixel on the display panel according to the color information of the target color of each of image pixels, using a multiple primary color conversion method, wherein in the display pixel, each display sub-pixel corresponds to a color;
• and
• driving the display panel to display according to the grayscales of l display sub-pixels in each of the display pixels, wherein
• the multiple primary color conversion method, for computing grayscales of l primary colors of a target color in an l-primary-color color gamut space according to color information of the target color, wherein l is a positive integer greater than 3, the color information of the target color comprises color coordinates of the target color and a brightness of the target color, wherein, the multiple primary color conversion method comprises:
• in step S110, determining at least one color triangle corresponding to the target color in an l-primary-color system chromaticity diagram according to the color coordinates of the target color;
• in step S120, computing grayscale components of l primary colors corresponding to the target color in each of the at least one color triangle according to the color coordinates of the target color and an initial brightness component, wherein the initial brightness component is computed according to the following equation:
• Y0=Y/n, where Y0 is the initial brightness component, Y is the brightness of the target color, and n is the number of the at least one color triangle corresponding to the target color;
• in step S130, adding up grayscale components of each came primary color respectively in the at least one color triangle corresponding to the target color, to obtain initial grayscales of l primary colors;
• in step S140, judging whether there is an overflow grayscale in the initial grayscales of l primary colors, wherein the overflow grayscale is an initial grayscale whose grayscale value is greater than a grayscale threshold;
• if there is no overflow grayscale in the initial grayscales of l primary colors, then performing step S160, if there is an overflow grayscale in the initial grayscales of l primary colors, then performing step S150;
• in step S150, reducing the initial brightness component corresponding to at least one of grayscale components greater than a grayscale component threshold among grayscale components of same primary color as the overflow grayscale, and adjusting initial brightness components corresponding to other grayscale components of the same primary color as the overflow grayscale, wherein, a sum of all adjusted initial brightness components and all unadjusted initial brightness components is the brightness of the target color, computing grayscale components of l primary colors in color triangles including the primary color of the overflow grayscale according to the color coordinates of the target color and the adjusted initial brightness components, and performing steps S130 and S140;
• in step S160, determining the initial grayscales of l primary colors as grayscales of l primary colors of the target color in the l-primary-color color gamut space.

A display apparatus, comprising a display panel and a driving device for driving the display panel, wherein the display panel comprises a plurality of display pixels, each of the display pixels comprises l display sub-pixels having different colors, wherein,

• the driving device comprises at least one processor and a memory for storing at least one program;
• wherein, the at least one program, when executed by the at least one processor, causes the at least one processor to perform a driving method,
• wherein the driving method for driving a display panel to display an image to be displayed, wherein the display panel comprises a plurality of display pixels, each of the display pixels comprises l display sub-pixels having different colors, wherein, the driving method comprises:
• acquiring color information of a target color of each of image pixels in the image to be displayed;
• computing grayscales of l display sub-pixels in a corresponding display pixel on the display panel according to the color information of the target color of each of image pixels, using a multiple primary color conversion method, wherein in the display pixel, each display sub-pixel corresponds to a color;
• and
• driving the display panel to display according to the grayscales of l display sub-pixels in each of the display pixels, wherein
• the multiple primary color conversion method, for computing grayscales of l primary colors of a target color in an l-primary-color color gamut space according to color information of the target color, wherein l is a positive integer greater than 3, the color information of the target color comprises color coordinates of the target color and a brightness of the target color, wherein, the multiple primary color conversion method comprises:
• in step S110, determining at least one color triangle corresponding to the target color in an l-primary-color system chromaticity diagram according to the color coordinates of the target color;
• in step S120, computing grayscale components of l primary colors corresponding to the target color in each of the at least one color triangle according to the color coordinates of the target color and an initial brightness component, wherein the initial brightness component is computed according to the following equation:
• Y0=Y/n, where Y0 is the initial brightness component, Y is the brightness of the target color, and n is the number of the at least one color triangle corresponding to the target color;
• in step S130, adding up grayscale components of each same primary color respectively in the at least one color triangle corresponding to the target color, to obtain initial grayscales of l primary colors;
• in step S140, judging whether there is an overflow grayscale in the initial grayscales of l primary colors, wherein the overflow grayscale is an initial grayscale whose grayscale value is greater than a grayscale threshold;
• if then is no overflow grayscale in the initial grayscale, of l primary colors, then performing step S160, if there is an overflow grayscale in the initial grayscales of l primary colors, then performing step S150;
• in step S150, reducing the initial brightness component corresponding to at least one of grayscale components greater than a grayscale component threshold among grayscale components of same primary color as the overflow grayscale, and adjusting initial brightness components corresponding to other grayscale components of the same primary color as the overflow grayscale, wherein, a sum of all adjusted initial brightness components and all unadjusted initial brightness components is the brightness of the target color, computing grayscale components of l primary colors in color triangles including the primary color of the overflow grayscale according to the color coordinates of the target color and the adjusted initial brightness components, and performing steps S130 and S140;
• in step S160, determining the initial grayscales of l primary colors as grayscales of l primary colors of the target color in the l-primary-color color gamut space.