Patent ID: 8035652

Claim:
A color signal generating circuit for generating a display signal, comprising: a) a color storage unit including a maximum of 2 P registers, a storage capacity of each register in said color storage unit being r bits, and a color signal being stored in said each register; b) a selection unit for selecting one register from said color storage unit on the basis of a p-bit color designation signal of a (p+q)-bit first display signal input from an external device; and c) a calculating unit being capable of generating a maximum of (2 P *p) kinds of a second display signal having r-bit data on the basis of an r-bit first color signal stored in said register selected by said selection unit and a q-bit color changing signal excluding said color designation signal from said first display signal, by multiplying the color changing signal with an s-bit Y-signal that is part of the selected r-bit first color signal of the color storage unit to generate a luminance signal, where p, q, r, and s are natural numbers.