Shutter control circuit having exposure time display

Details Shutter control circuit having exposure time display Shutter control circuit having exposure time display

1976-06-21

1978-08-15

Adams, Russell E.

354 23D, 354 53, G03B 700

Patent

active

041077083

ABSTRACT:
An electric shutter circuit having an exposure time display disabled in synchronism with the opening of a camera shutter. A brightness-time conversion circuit and a pulse generator together develops a plurality of pulses the number of which is representative of the exposure time and which are stored in a reversible counter. Upon actuation of a shutter release mechanism a display circuit is enabled to display the exposure time by displaying a visual signal determined by the number of pulses stored in the reversible counter. The display circuit is disabled in synchronism with the shutter opening. In one embodiment a Schmidt trigger circuit is triggered by the shutter release mechanism to disable the display circuit.

REFERENCES:
patent: 3843249 (1974-10-01), Kitaura
patent: 3872483 (1975-03-01), Numata et al.
patent: 3876876 (1975-04-01), Kitai et al.
patent: 3955185 (1976-05-01), Nishimura

Affiliated with

Also associated with

Rating

Shutter control circuit having exposure time display does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Shutter control circuit having exposure time display, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shutter control circuit having exposure time display will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1439749