Electronic flash control device

Details Electronic flash control device Electronic flash control device

1980-03-13

1983-03-22

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

354145, H05B 4132

Patent

active

043777740

ABSTRACT:
A control circuit controls the amount of light emitted from an electronic flash tube in accordance with the voltage of a main capacitor, which energizes the flash tube, and a set guide number so that the amount of light may be constant irrespective of changes in the voltage of the main capacitor due to consumption of a power source battery from which electric energy is supplied to the main capacitor. The control circuit may include a storing or memorizing capacitor for storing a signal corresponding to the voltage of the main capacitor and further include a transistor which generates a current commensurate with the stored signal, the current being integrated to actuate a flash emission stopping circuit when the integration reaches a given level.

REFERENCES:
patent: Re28783 (1976-04-01), Ackermann
patent: 3683233 (1972-08-01), Heintze
patent: 3710701 (1973-01-01), Takishima et al.
patent: 3714872 (1973-02-01), Mashimo
patent: 3906292 (1975-09-01), Takahashi
patent: 3978370 (1976-08-01), Stieringer

Affiliated with

Also associated with

Rating

Electronic flash control device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic flash control device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic flash control device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1871325