Automatic sensitivity controller for electronic still camera

Details Automatic sensitivity controller for electronic still camera Automatic sensitivity controller for electronic still camera

1988-08-31

1990-02-20

Ng, Jin F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358225, H04N 5235

Patent

active

049031368

ABSTRACT:
An automatic sensitivity controller for use in an electronic still camera system which performs flash photography. This device is designed to expand the range of the photographable subject-to-camera distance even if a small-emission electronic flash is employed and is provided with an image pickup device, a distance metering element for measuring the camera-to-subject distance, a variable-gain amplifier circuit having a control terminal and amplifying a video signal supplied from the image pickup device at a gain determined in response to a control signal applied to the control terminal; and a gain control device for applying a control signal relating to a measured value of the camera-to-subject distance to the control terminal.

REFERENCES:
patent: 4168235 (1986-10-01), Ishida et al.
patent: 4609944 (1986-09-01), Nakada et al.
patent: 4621292 (1986-11-01), Hirao et al.
patent: 4768876 (1987-10-01), Okino
patent: 4780766 (1987-05-01), Nutting

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