Method and device for controlling electric discharge lamps with

Details Method and device for controlling electric discharge lamps with Method and device for controlling electric discharge lamps with

1993-06-17

1998-03-17

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315DIG4, 315DIG5, 315362, H02B 3702

Patent

active

057290970

ABSTRACT:
A method and device for controlling electric discharge lamps with electronic fluorescent lamp ballasts, using a bistable reverse switch system in the electric circuit in such manner that in turning the lamp on to a first switching condition, and after a short period of interruption of the electric circuit to the current supply of the lamp, the bistable reverse switch system acquires a second switching condition. It is thereby possible to reduce the lamp from a first level of brightness to a second lower level of brightness. It has the effect of a "dimmer" used with fluorescent lamps.

REFERENCES:
patent: 3943375 (1976-03-01), Williamson
patent: 4189664 (1980-02-01), Hirschfeld
patent: 4350934 (1982-09-01), Spreadbury
patent: 4431948 (1984-02-01), Elder
patent: 4443740 (1984-04-01), Goralnik
patent: 4562384 (1985-12-01), Owen
patent: 4833339 (1989-05-01), Luchaco
patent: 4937702 (1990-06-01), Kurihara
patent: 4950463 (1990-08-01), Sievers

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