Camera equipped with a lamp lighting controlling device

Details Camera equipped with a lamp lighting controlling device Camera equipped with a lamp lighting controlling device

1995-08-22

1997-04-08

Metjahic, Safet

Photography

With object illumination for exposure

Variable intensity control

396205, G03B 700

Patent

active

056197365

ABSTRACT:
A camera is provided that is equipped with a lamp lighting controlling device that does not require a complicated circuit structure and that does not shorten the life of batteries and lamps. The camera is equipped with a lamp lighting controlling device that lights a lamp before the shutter release operation in order to alleviate red eye. The camera includes an electrical current controlling device that carries out a pulse electrical current control to repeatedly connect and disconnect the electrical current to the lamp and a clocking device that clocks a first time interval before the shutter release operation commences and a second time interval that immediately follows the first time interval. The electrical current controlling device lights the lamp with the largest stationary duty value during the second time interval and lights the lamp with an initial duty value during the first time interval. The initial duty value is smaller than the stationary duty value.

REFERENCES:
patent: 3438766 (1969-04-01), Biber
patent: 4592639 (1986-06-01), Nakamura
patent: 4999663 (1991-03-01), Nakamura
patent: 5115169 (1992-05-01), Aoki
patent: 5313247 (1994-05-01), Hosomizu et al.
patent: 5491533 (1996-02-01), Sakamoto
patent: 5508780 (1996-04-01), Hara et al.

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