Patent ID: 6766107
Filing Date: 2004-07-20
Classification: G03B

Abstract:
A lens-fitted photo film unit preloaded with a roll of unexposed photo filmstrip, and provided with a shutter mechanism for exposing said photo filmstrip through a taking lens, said lens-fitted photo film unit comprising:a flash device for projecting a flash light toward a subject; a flash light control device that measures a light amount reflected from the subject while said flash device is projecting the flash light, and stops said flash device from projecting the flash light when the measured light amount reaches a predetermined value, the flash light control device comprising: a thyristor connected so that when the thyristor is turned on, current is diverted from the flash device; and an ON-voltage generating circuit comprising a resistor and a capacitor connected so that when the capacitor discharges through the resistor, a voltage across the resistor turns on the thyristor; and a stop changing device that changes over an aperture-stop at least between a large size and a small size.