Patent ID: 7274833

Claim:
An image processing device for performing off-screen display, comprising: a control unit; a first storing zone disposed in a memory, electrically connected to said control unit and storing therein a first image frame; a frame buffer register electrically connected to said control unit and said first storing zone, and having a total buffer size of n rows and m columns, where n is a positive integer less than the row number of said first image frame, and m is a positive integer less than the column number of said first image frame, said frame buffer register receiving said first image frame portion by portion to perform image scaling and image quality enhancing operations in response to a first control signal from said control unit, wherein the size of each portion is equal to said total buffer size; a first buffering zone disposed in the same memory as the storing zone, and receiving and storing said first image frame having been processed by said frame buffer register portion by portion to form a first processed frame; and a first image processor electrically connected to said first buffering zone and processing said first processed frame into a first image signal in response to a second control signal from said control unit to be displayed in an off-screen mode.