Exposure information input circuit for electric shutter
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United States of America Patent
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Oct 12, 1982
Grant Date -
N/A
app pub date -
Apr 25, 1980
filing date -
Apr 28, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an electric shutter having a photoelectric element, a time constant circuit for use in controlling exposure and a low brightness sensor circuit for use in connecting said photoelectric element in series with a comparator resistance and in sensing a low brightness in reference to its partial voltage, an exposure information input circuit for setting one reference voltage to be applied for determining said trigger levels of the two sensor circuits so as to feed exposure information such as film sensitivity, etc. and further having a function correction circuit between said reference voltage and one of said two sensor circuits.
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