Patent ID: 7643094

Claim:
A color image processing apparatus of performing a color image display using a red display, a green display, a blue display and a white display, comprising: white signal generation instrument which generates a white signal W =min( R in ,G in ,B in ), (Formula 1) based on an input red signal R in for making said red display to be inputted, an input green signal G in for making said green display to be inputted, and an input blue signal B in for making said blue display to be inputted; yellow signal generation instrument which generates a yellow signal Ye =min( R in −W,G in −W ), (Formula 2) based on said input red signal R in to be inputted, said input green signal G in to be inputted, and said generated white signal W; and first output white signal generation instrument which generates a first output white signal W out (1) for making said white display to be outputted, based on said generated white signal W and said generated yellow signal Y, wherein said first output white signal generation instrument generates said first output white signal W out (1) W out (1) =W+K 1 ·Ye (Formula 3) for a predetermined positive constant K 1 .