Image pickup device using plural control parameters for exposure

Details Image pickup device using plural control parameters for exposure Image pickup device using plural control parameters for exposure

1992-08-19

1998-11-03

Garber, Wendy

Television

Camera, system and detail

Optics

348364, 348229, 396236, 396242, H04N 5232

Patent

active

058316760

ABSTRACT:
An image pickup device capable of exposure control utilizing the iris aperture, shutter speed and gain as three control parameters, comprising means for setting a photometry area in the image frame; means for setting an input parameter as a reference for evaluation, based on the luminance information in an image signal obtained from the photometry means; means for determining the values of the three control parameters for exposure control, according to the value of the input parameter; switch means for switching, according to the phototaking mode, a program setting the control caharacteristics of each control parameter as a function of the input parameter; and photometry area switch means for switching the set state of the photometry area in the image frame, in linkage with the switching operation of the switch means, wherein the phototaking mode is switched according to the phototaking conditions, thereby controlling the parameters and the light metering area according to a program matching the phototaking mode, and enabling to constantly effect the optimum phototaking operation under any phototaking situation or conditions.

REFERENCES:
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patent: 4606065 (1986-08-01), Beg et al.
patent: 4769668 (1988-09-01), Ishikawa et al.
patent: 4910600 (1990-03-01), Kondo
patent: 5053871 (1991-10-01), Ogawa et al.
patent: 5128769 (1992-07-01), Arai et al.
patent: 5184169 (1993-02-01), Nishitani
patent: 5194960 (1993-03-01), Ota
patent: 5212557 (1993-05-01), Ueda

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