Patent ID: 8144078

Claim:
A video display system for providing an enhanced viewing area, comprising: a cathode ray tube further comprising: a plurality of cathodes at a first end of said cathode ray tube, said plurality of cathodes being operable to emit electron beams; an anode at a second end of said cathode ray tube; a display area at a second end of said cathode ray tube, said display area operable to generate a visible image in response to electron beams incident thereon; and at least one grid disposed between said plurality of cathodes and said anode, said grid being operable to control said electron beams thereby controlling the display characteristics of a visible image displayed on said cathode ray tube; a first control circuit for controlling said plurality of cathodes; a second control circuit operable to apply video enhancement signals to said grid at predetermined timing intervals to generate an enhanced viewing area on a portion of said display area of said cathode ray tube; wherein said first control circuit comprises a delay circuit operable to delay arrival of video signal at said plurality of cathodes to coincide with the arrival of corresponding video enhancement signals at said grid.