Multi-primary color conversion method, driving method and driving device of display panel, and display device

A multi-primary color conversion method for converting color information of a target color to be displayed into target gray scales of a plurality of primary colors, a number of the plurality of primary colors being greater than 3, the color information of the target color comprising color coordinates (x0, y0) and a target luminance (Y0) of the target color, and the multi-primary color conversion method comprising:

• establishing a spatial gamut model of a display panel in a CIE xyY color space according to all colors that the display panel is able to display, the spatial gamut model being formed by a plurality of peripheral surfaces and an xoy plane of the CIE xyY color space;
• wherein each of the plurality of peripheral surfaces has a plurality of vertices such that a projection of the peripheral surface on the xoy plane is in the shape of a polygon, each vertex of the polygon is a point at which a color obtained when at least one primary color has a maximum value is located, and inner regions of projections of the plurality of peripheral surfaces on the xoy plane do not overlap;
• determining a target peripheral surface corresponding to the target color according to the color coordinates of the target color and color coordinates of a color corresponding to each vertex of each of the plurality of peripheral surfaces;
• obtaining reference gray scales of a part of the plurality of primary colors of the target color according to gray scales of the plurality of primary colors of a color corresponding to each vertex of the target peripheral surface;
• obtaining reference gray scales of the rest of the plurality of primary colors of the target color and a reference luminance of the target color according to the obtained reference gray scales of the part of the plurality of primary colors of the target color and a relationship between the gray scales of the plurality of primary colors of the target color and the reference luminance and the color coordinates of the target color;
• and
• converting the reference gray scale of each of the plurality of primary colors of the target color into a target gray scale according to a proportional relationship between the reference luminance and the target luminance of the target color.