Photography – With object illumination for exposure – With power supply detail
Patent
1996-12-30
1998-02-24
Perkey, W. B.
Photography
With object illumination for exposure
With power supply detail
315241P, G03B 1505, H05B 4132
Patent
active
057219869
ABSTRACT:
Disclosed is a camera provided with a strobe system. The strobe system includes a capacitor to be charged. Charging voltage of the capacitor can be detected through an output terminal. The output terminal can be electrically connected and disconnected to and from the capacitor by a switching element. The circuit has an input terminal which receives a control signal. In response to the control signal, charging operation is enabled, and at the same time, the switching element is controlled to connect the output terminal to the capacitor. While, if the charging voltage has reached an upper limit, the charging operation is disabled and the output terminal is disconnected from the capacitor for a predetermined period of time by changing the status of the control signal.
REFERENCES:
patent: 4196458 (1980-04-01), Kondo
patent: 4384776 (1983-05-01), Takami
patent: 4630916 (1986-12-01), Ishiguro et al.
patent: 5068575 (1991-11-01), Dunsmore et al.
patent: 5083062 (1992-01-01), Ichihara
patent: 5194889 (1993-03-01), Ogawa
patent: 5221942 (1993-06-01), Ogawa
Azegami Kazuyoshi
Kishimoto Masaaki
Nomura Hiroshi
Numako Norio
Sasaki Takamitsu
Asahi Kogaku Kogyo Kabushiki Kaisha
Perkey W. B.
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