Patent ID: 7199839

Claim:
A color signal processing device receiving an input color signal having display primaries in a multi-primary color display, comprising: a tristimulus value calculation unit calculating tristimulus values (X, Y, Z) of the color signal; a display primary control signal calculation unit calculating a control signal of each display primary to represent the color signal with a number of display primaries based on the calculated tristimulus values (X, Y, Z) of the color signal; a control unit setting a display control signal of each display primary with the calculated control signal calculated by the display primary control signal calculation unit to display the color signal on the multi-primary color display; a gamma characteristic storage unit storing a gamma characteristic of a standard color signal; and a linear standard color signal calculation unit extracting the gamma characteristic corresponding to the color signal from the gamma characteristic storage unit, and compensating for a non-linear control component of the color signal with the retrieved gamma characteristic and converting the color signal into a linear standard color signal; wherein at least one of the number of display primaries is an auxiliary primary color D.