Methods for compensating colors based on virtual chromaticity coordinate points and the related display devices

A method of operating a display, comprising:

• receiving an input image signal for the display;
• and
• generating a control signal based on the input image signal and a compensation matrix to drive the display,
• wherein the display comprises an array of pixels and is configured to output light in a virtual color gamut according to the control signal, wherein pixels in the array comprise a plurality of first sub-pixels defining a first color area on a chromaticity plane, a plurality of second sub-pixels defining a second color area on the chromaticity plane and a plurality of third sub-pixels defining a third color area on the chromaticity plane;
• and
• wherein the virtual color gamut of the display is among the first, second and third color areas on the chromaticity plane, and not overlapping any of the first, second or third color areas,
• the first color area is represented by a first circle, the second color area is represented by a second circle;
• and the third color area is represented by a third circle,
• a center of the first circle is a typical chromaticity coordinate point of the plurality of first sub-pixels and a radius of the first circle is a derivation of the plurality of first sub-pixels, a center of the second circle is a typical chromaticity coordinate point of the plurality of second sub-pixels and a radius of the second circle is a derivation of the plurality of second sub-pixels, and a center of the third circle is a typical chromaticity coordinate point of the plurality of third sub-pixels and a radius of the third circle is a derivation of the plurality of third sub-pixels.

A method for compensating colors of a display, the display comprising an array of pixels, wherein pixels in the array comprise a plurality of first sub-pixels, a plurality of second sub-pixels and a plurality of third sub-pixels, the method comprising:

• determining chromaticity coordinate points of the plurality of first sub-pixels, the plurality of second sub-pixels, and the plurality of third sub-pixels;
• determining a first virtual chromaticity coordinate point on a chromaticity plane based on a first color area associated with the chromaticity coordinate points of the plurality of first sub-pixels, determining a second virtual chromaticity coordinate point on the chromaticity plane based on a second color area associated with the chromaticity coordinate points of the plurality of second sub-pixels, and determining a third virtual chromaticity coordinate point on the chromaticity plane based on a third color area associated with the chromaticity coordinate points of the plurality of third sub-pixels, wherein:
• the first color area corresponds to a first circle on the chromaticity plane;
• the second color area corresponds to a second circle on the chromaticity plane;
• the third color area corresponds to a third circle on the chromaticity plane;
• and
• a center of the first circle is a typical chromaticity coordinate point of the plurality of first sub-pixels and a radius of the first circle is a derivation of the plurality of first sub-pixels, a center of the second circle is a typical chromaticity coordinate point of the plurality of second sub-pixels and a radius of the second circle is a derivation of the plurality of second sub-pixels, and a center of the third circle is a typical chromaticity coordinate point of the plurality of third sub-pixels and a radius of the third circle is a derivation of the plurality of third sub-pixels;
• and
• calculating a compensation matrix based on the virtual chromaticity coordinate points for compensating colors of the display.