Patent ID: 6326996
Filing Date: 2001-12-04
Classification: H04N

Abstract:
A display device having the capability of receiving video signals from an external source, and displaying said signals on a display screen, comprising:a storage for storing a diagnostic pattern for display on the display screen, wherein the storage comprises a read only memory containing instructions for a microprocessor;an input device mounted on the display device for receiving an instruction directly from a person viewing the display screen to display the diagnostic pattern independent of the video signals from the external source; anda controller for converting the instruction into control signals to cause the storage to provide the diagnostic pattern for display on the display screen, wherein the controller comprises the microprocessor, wherein the microprocessor is coupled to the input and to the multiplexor for causing the multiplexor to provide the diagnostic pattern to the display screen for display in response to instructions received on the input;a multiplexor coupled to the display screen and to the storage and external source of video signals for selectively providing the pattern and the video signals for display on the display screen, wherein the multiplexor has the capability to isolate the external video signals from the diagnostic pattern and provide the diagnostic pattern to the display screen.