Color temperature detecting device wherein comparison is made be

Details Color temperature detecting device wherein comparison is made be Color temperature detecting device wherein comparison is made be

1989-10-11

1991-06-11

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 41, H04N 964, H04N 904

Patent

active

050237047

ABSTRACT:
A color temperature detecting device comprises a plurality of color detectors for detecting levels of a plurality of color components included in light incident thereon, a comparator for comparing levels of the plurality of color components with respective reference levels; a device for detecting the illuminance level of the incident light and a controller for changing the reference levels correspondingly with the detected illuminance level.

REFERENCES:
patent: 4774564 (1988-09-01), Konishi
patent: 4847680 (1989-07-01), Okino
patent: 4855814 (1989-08-01), Shiraishi et al.
patent: 4879591 (1989-11-01), Takei
patent: 4883360 (1989-11-01), Kawada et al.
patent: 4922330 (1990-11-01), Saito et al.
patent: 4942459 (1990-07-01), Hieda et al.
patent: 4954884 (1990-09-01), Nakayama et al.

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