Light metering device with adjustable output

Details Light metering device with adjustable output Light metering device with adjustable output

1995-03-10

1997-02-11

Metjahic, Safet

Photography

Exposure control circuit

Shutter speed function only

356224, 352141, 396257, 396213, G03B 708, G03B 7083, G01J 142

Patent

active

056026170

ABSTRACT:
A light metering device incorporates a light dependent resistor as a light sensing element, a network including a plurality of circuit elements, and a selection mechanism for selectively connecting the light dependent resistor to one of the plurality of circuit elements in the network. The selection mechanism is controlled to set a voltage measured at an output terminal of the light dependent resistor within a predetermined threshold level. The light metering device can be readily incorporated in both photographic and electronic cameras.

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patent: 4821056 (1989-04-01), Shinoda et al.
patent: 5138149 (1992-08-01), Cadet et al.
patent: 5254846 (1993-10-01), Fayfield

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