Electronic flash

Details Electronic flash Electronic flash

1984-05-07

1986-05-27

Dixon, Harold

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315207, 315208, H05B 3700

Patent

active

045917620

ABSTRACT:
A series controlled electronic flash of automatic emission control type includes a switching element connected in series with a commutating switching element for selectively charging a commutation capacitor. A trigger signal is repeatedly applied to a main switching element, the commutating switching element and the charging switching element in a given sequence to enable a continued emission at substantially constant brightness level to be obtained from a flash discharge tube. A trigger capacitor may be connected with pair of switching elements for charging and discharging the trigger capacitor. A trigger signal may be repeatedly applied to the pair of switching elements for charging and discharging the trigger capacitor, to the main switching element, to the commutating switching element and the commutation capacitor charging switching element in a given sequence, thereby allowing a multiple emission to be obtained intermittently and at a high rate from the flash discharge tube.

REFERENCES:
patent: 3896333 (1975-07-01), Nakamura
patent: 3940659 (1976-02-01), Kojima et al.
patent: 4344020 (1982-08-01), Horinski

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