Apparatus having liquid crystal finder optical system

Details Apparatus having liquid crystal finder optical system Apparatus having liquid crystal finder optical system

1982-04-01

1984-10-23

Corbin, John K.

350332, 354164, 354221, 354222, G02F 113, G03B 1320, G03B 1314, G03B 1310

Patent

active

044784937

ABSTRACT:
The disclosed apparatus includes a finder optical system with a liquid crystal display having a plurality of strips of transparent conductive material arranged to display a frame for photography and a light metering area in the field of view of the finder. The liquid crystal display is energized in selected or all areas depending upon which position the objective lens takes when focusing and when zooming, or upon the set value of focal length in an objective lens of zoom type, and upon the in-focus signal of an auto-focus camera. The parallax between the photographic framing of viewfield and the rangefinder view is corrected and the rangefinder spot is displayed in a corrected position.

REFERENCES:
patent: 3534672 (1970-10-01), Ono
patent: 4299462 (1981-11-01), Suzuki et al.

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