Photography – With object illumination for exposure – With power supply detail
Patent
1999-02-18
2000-03-07
Adams, Russell
Photography
With object illumination for exposure
With power supply detail
306 6, 306317, G03B 726
Patent
active
060351411
ABSTRACT:
An optical data recording circuit suitably adapted for a low cost, one-time-use camera in which an LED optical recording device is connected via a switch device from one terminal of a battery supply to the base of an oscillator transistor in an oscillator charging circuit. The base of the oscillator transistor is connected via a resistor to the other terminal of the battery supply and via an oscillator charger circuit ON/OFF switch and secondary winding of the charger step-up transformer to the first terminal of the battery supply. The battery is such that its no-load output voltage is sufficient to illuminate the LED. When the switch device is closed to initiate recording of an optical data bit on film in the camera, the LED is illuminated from the battery no-load output voltage if the ON/OFF switch is open and the charging circuit is not running. If the ON/OFF is being held closed while taking a picture, the LED is then illuminated by pulses from the oscillator circuit step-up transformer, preferably by flyback pulses from the transformer secondary winding to the base of the oscillator transistor.
REFERENCES:
patent: 4112444 (1978-09-01), Yonemoto et al.
patent: 4199242 (1980-04-01), Hosomizu et al.
patent: 4332445 (1982-06-01), Hosono
patent: 5574337 (1996-11-01), Dunsmore
patent: 5752084 (1998-05-01), Motomura et al.
patent: 5784658 (1998-07-01), Hata et al.
patent: 5875357 (1999-02-01), Motomura et al.
Adams Russell
Boos, Jr. Francis H.
Eastman Kodak Company
LandOfFree
Optical data recording circuit for a film camera does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical data recording circuit for a film camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical data recording circuit for a film camera will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-371323