.~ Manual Av circuit with automatic Tv circuit, or vice versa
DEFINITION
Classification: 396/245
Manual Av circuit with automatic Tv circuit, or vice versa:
(under subclass 213) Subject matter including a manual aperture control circuit (Av circuit) responsive to a manually set aperture value with an automatic exposure time control circuit (Tv circuit) generating an exposure time calculated from the manually set aperture value and a detected scene brightness; or a manual Tv circuit responsive to a manually set exposure time value with an automatic Av circuit generating an aperture value calculated from the manually set exposure time value and a detected scene brightness.
(1) Note. Aperture value (Av) or exposure time value (Tv) is a logarithmic number indicative of the aperture size or the exposure time.
SEE OR SEARCH THIS CLASS, SUBCLASS:
, FOR 741+, for foreign art collections involving camera automatic exposure control having circuit for controlling separate diaphragm and shutter.
