Display monitor

Details Display monitor Display monitor

1993-04-20

1995-09-12

Groody, James J.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348910, 348687, H04N 557

Patent

active

054501385

ABSTRACT:
A display monitor includes a contrast controller which produces a contrast control signal that varies with time an intensity control signal, which is supplied from an intensity controller to a video signal controller, by being superimposed on the intensity control signal or a video signal inputted to the video signal controller. The contrast control signal varies in the form of a 1/f fluctuation so that the intensity of display varies with time, thereby reducing the screen flicker caused by the scanning operation of a constant period, whereby fatigue of the eyes of the operator in a long-term screen watching job is alleviated.

REFERENCES:
patent: 3710175 (1973-01-01), Halpern
patent: 3983575 (1976-09-01), Nagai et al.
patent: 4496978 (1985-01-01), Sakamoto et al.
patent: 4670787 (1987-06-01), Levine
patent: 4682231 (1987-07-01), Yamakawa
patent: 5019791 (1991-05-01), Cohen

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