Dimming circuit for a gas-discharge lamp

Details Dimming circuit for a gas-discharge lamp Dimming circuit for a gas-discharge lamp

2006-03-21

2006-03-21

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315SDIG002

Reexamination Certificate

active

07015656

ABSTRACT:
A dimming circuit for a gas-discharge lamp includes a first terminal and a second terminal for inputting AC power, a variable resistor and a capacitor connected with the respective first end to each other and the respective second end to the first input terminal and the second input terminal respectively, a bi-directional diode connected with one end to the first end of the variable resistor and the first end of the capacitor, a TRIAC, which has the gate thereof connected to the second end of the bi-directional diode and one end connected to the second input terminal, and a switch connected in series between the second input terminal and the capacitor for circuit on/off control, for enabling the light intensity of the gas-discharge lamp to be regulated subject to change of the resistance value of the variable resistor.

REFERENCES:
patent: 5422547 (1995-06-01), Brownell
patent: 5949197 (1999-09-01), Kastner
patent: 6288630 (2001-09-01), Bardouillet
patent: 2002/0101193 (2002-08-01), Farkas et al.

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