Patent ID: 7327342

Claim:
A controller/driver comprising: a control section dividing first bitmap image data representative of n 1 grayscale image into first and second data pieces, n 1 being a natural number; a first memory section storing first storage data selected out of said first data piece and second bitmap image data representative of n 2 grayscale image, n 2 being smaller than n 1 ; a second memory section storing second storage data selected out of said second data piece and said first storage data received from said first memory section; and a driver section for driving data lines of a display panel in response to said first and second storage data stored in said first and second memory sections, respectively, wherein said second data piece is selected as said second storage data to be stored in said second memory section, when said first data piece is selected as said first stored data to be stored in said first memory section, and wherein said first storage data is selected as said second storage data to be stored in said second memory section, when said second bitmap image data is selected as said first stored data.