IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD

摘要

A synchronization judgment memory control unit (55) performs access control to a frame memory (5) according to a clock (CKM), a main synchronization signal (MV), and a sub synchronization signal (SV), writes a main image signal into a frame memory (54), and outputs the main image signal from the frame memory (54) to a superposition unit (56). A signal superposition control unit (57) generates a superposition control signal according to the clock (CKM) generated in accordance with the main synchronization signal (MV) of a stable main screen and a sub synchronization signal (SV) of a sub screen moving more rapidly than the main screen. A superposition unit (56) combines the main image signal and the sub image signal outputted by the synchronization judgment memory control unit (55) according to a superposition control signal, thereby generating a superposed image signal in two-screen display.