Piezoelectric electronic shutter control for cameras

摘要

A shutter control device is disclosed which includes a shutter which is openable to permit scene light to pass through a camera aperture, an electronic circuit for producing a signal which varies in accordance with the level of scene illumination, and a single piezoelectric energy conversion device such as a bimorph for providing electrical energy to the circuit and for controlling the condition of the shutter in response to the signal from the electronic circuit to automatically establish the exposure period.