Halogen-lamp illumination/control circuit

Details Halogen-lamp illumination/control circuit Halogen-lamp illumination/control circuit

1991-05-14

1993-08-24

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315139, 315224, 315DIG7, H05B 4136

Patent

active

052392406

ABSTRACT:
Disclosed herein is a halogen-lamp illumination/control circuit which includes a switching circuit unit for applying an a.c. power to the halogen lamp each time a firing pulse is received, a zero-crossing detection unit for detecting the timing at the time of zero-crossing of the a.c. power, a firing control unit for outputting a firing pulse each time a zero-crossing detection signal is received, and an illuminating command unit for supplying the firing pulse to the switching circuit unit during a period in which an illuminating command signal is inputted so as to make the same conductive.

REFERENCES:
patent: 4580080 (1986-04-01), Smith
patent: 4645982 (1987-02-01), Takayanagi
patent: 4745351 (1988-05-01), Rowen et al.

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