Patent ID: 7315313

Claim:
A controller/driver for driving main and sub display panels, comprising: first and second memory sections; a color reduction circuit; and a data line driver circuit, wherein, when said controller/driver is placed in a first mode, said color reduction circuit offers color-reduction under a first condition for input image data to develop first color-reduce image data, and offers color-reduction under a second condition different from said first condition for said input image data to develop second color-reduced image data, and said first and second memory sections store therein said first and second color-reduced image data, respectively, and wherein, when said controller/driver is placed in said first mode, said data line driver circuit drives one of said main and sub display panels in response to one of said first and second color-reduced image data at a first frame, and drives said one of said main and sub display panels in response to another of said first and second color-reduced image data at a second frame following said first frame, wherein, when said controller/driver is placed in a second mode, said first memory section stores therein main image data associated with a main image to be displayed on said main display panel, and said second memory section stores therein sub image data associated with a sub image to be displayed on said sub display panel, and wherein, when said controller/driver is placed in said second mode, said data line driver circuit drives said main display panel in response to said main image data stored in said first memory section, and drives said sub display panel in response to said sub image data stored in second memory section.