Circuit arrangement for dimming at least one lamp

Details Circuit arrangement for dimming at least one lamp Circuit arrangement for dimming at least one lamp

2006-12-26

2006-12-26

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S246000, C315SDIG002

Reexamination Certificate

active

07154230

ABSTRACT:
A method and circuit arrangement for dimming at least one lamp, includes a connection for a supply voltage; a dimming device connected on the input side to the supply voltage and has an input for a dimming selection and at least one switch; and a filter connected to the output of the dimming device, the filter having at least one capacitor and an output for coupling to an electronic ballast; wherein it also has an input impedance modification device connected to the filter device and is designed to modify the input impedance active at the input of the filter.

REFERENCES:
patent: 6545431 (2003-04-01), Hui et al.
patent: 6597127 (2003-07-01), Takahashi et al.
patent: 7075251 (2006-07-01), Chen et al.

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