White balancing apparatus for color television cameras

Details White balancing apparatus for color television cameras White balancing apparatus for color television cameras

1982-09-23

1985-03-19

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 40, H04N 904

Patent

active

045062900

ABSTRACT:
A white balancing apparatus for color television cameras, which varies the response of color temperature compensation in accordance with the rate of change of the color temperature of the light illuminating an object to be shot by the camera. The apparatus includes a variable time constant circuit and a time constant control circuit which are connected between a color temperature detecting circuit and the chromaticity signal circuit of the TV camera, whereby the time constant is decreased and the response of color temperature compensation is made fast when the output variation of the color temperature detecting circuit deviates from a predetermined offset range.

REFERENCES:
patent: 3821789 (1974-06-01), Durbin
patent: 4355325 (1982-10-01), Nakamura
patent: 4395730 (1983-07-01), Shen

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