Patent ID: 7742205

Claim:
A method for transforming a color representation of a first set of color primaries with a plurality of first signals to a second set of color primaries with a plurality of second signals in a first domain, comprising the steps of: (a) transforming the first signals in the first domain to corresponding luminous intensity values of the color primaries in the first set in a second domain; (b) calculating a second signal of a dependent color primary in the second set according to a first function of the first signals; (c) calculating corresponding luminous intensity values of the color primaries in the second set in the second domain respectively by matching the corresponding luminous intensity values of the corresponding color primaries in the first set in the second domain; and (d) transforming the corresponding luminous intensity values of the other color primaries in the second set in the second domain to the second signals in the first domain, wherein the first set is R′G′B′-stripe, the second set is RGBW pattern, wherein the dependent color primary is W, and the step (b) further comprises the steps of: (b1) determining a minimum value from the first signals; and (b2) multiplying a first rate to the minimum value so as to calculate the second signal of the dependent color primary W.