Patent ID: 6922202

Claim:
An image display apparatus comprising: a control signal input device that inputs a control signal; an image signal input device that inputs an image signal from an external signal source; an image signal processing device that processes the inputted image signal; an image display device that displays an image based on the image signal processed by said image signal processing device, on a display screen; an operation signal output device that outputs an operation signal to the external signal source; a memory device that stores display screen information which can be rewritten by the control signal from said control signal input device; an image synthesis device that synthesizes the display screen information stored in said memory device and the image signal processed by said image signal processing device; and a control signal switching device that selectively switches use of the control signal from said control signal input device between a signal for rewriting the display screen information stored in said memory device and the operation signal to be outputted from said operation signal output device, according to an instruction from the control signal input device concerning a display area in which the display screen information stored in said memory device is displayed and a display area in which the image signal processed by said image signal processing device is displayed, said display areas being obtained by synthesis by said image synthesis device.