Exposure control circuit for a camera
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 24, 1984
Grant Date -
N/A
app pub date -
Dec 7, 1981
filing date -
Dec 26, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An exposure control circuit for camera comprises an integrating circuit including a plurality of capacitors for integrating a photocurrent which depends on the brightness of an object being photographed. The integrated voltage is compared against a decision voltage which depends on a particular value of film speed. The level of the decision voltage is switched either manually or automatically for low and high values of film speed as the combined capacitance of the integrating capacitors is switched.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully