Automatic image-tone control circuit and method for controlling

Details Automatic image-tone control circuit and method for controlling Automatic image-tone control circuit and method for controlling

1992-11-10

1994-04-26

Groody, James J.

Television

Image signal processing circuitry specific to television

Brightness control

H04N 514, H04N 5202

Patent

active

053071662

ABSTRACT:
In a tone control circuit of luminance signals, input-output characteristic having an arbitrary line graph is obtained by plural gradient adjusting circuits in response to frequencies of brightness of the luminance signals which are detected by plural IRE circuits.

REFERENCES:
patent: 4422095 (1983-12-01), Hosoya
patent: 5003394 (1991-03-01), Lagoni
patent: 5089891 (1992-02-01), Yamamoto
patent: 5196937 (1993-03-01), Kageyama

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