Color temperature detecting device for producing a color tempera

Details Color temperature detecting device for producing a color tempera Color temperature detecting device for producing a color tempera

1992-07-16

1995-05-02

Groody, James J.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348227, H04N 973, H04N 9097

Patent

active

RE0349267

ABSTRACT:
A color temperature detecting device includes a color component detecting element for detecting electric charges for color components excited by incident light and accumulated with the lapse of time to produce color component signals, a comparison circuit for comparing the color component signals with respective given reference signals to produce discharge time length signals which correspond to the respective accumulated Amounts of the electfie charges, and an output part for obtaining a ratio between the color components on the basis of the discharge time length signals produced from the comparison circuit to produce a signal according to the ratio as color temperature information.

REFERENCES:
patent: 4682210 (1987-07-01), Ikemura et al.
patent: 4739392 (1988-04-01), Ueda et al.

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