Patent ID: 7277075

Claim:
A liquid crystal displaying apparatus capable of displaying a color image, comprising: a liquid crystal panel in which each main pixel unit includes a red sub-pixel, a green sub-pixel, a blue sub-pixel and a luminance-enhancing sub-pixel, and calculation means for calculating digital output values Ro, Go and Bo for driving the red sub-pixel, the green sub-pixel and the blue sub-pixel, respectively, from digital input values Ri, Gi and Bi respectively for the red sub-pixel, the green sub-pixel and the blue sub-pixel and a digital value W for driving the luminance-enhancing sub-pixel so that a relationship of Ri:Gi:Bi=(Ro+W):(Go+W):(Bo+W) is satisfied, the values Ri, Gi and Bi being obtained from an input color image, wherein the digital value W is based on both a maximum value and a minimum value of the digital input values.