Low cost step dimming interface for an electronic ballast

Details Low cost step dimming interface for an electronic ballast Low cost step dimming interface for an electronic ballast

2008-01-22

2010-11-30

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S307000, C315SDIG002

Reexamination Certificate

active

07843141

ABSTRACT:
A step dimming interface is utilized to operate a load such as a gas discharge lamp. The dimming interface has first and second switches for determining when the gas discharge lamp operates at either a normal power level or a dimming power level. A rectifier circuit is connected to a control signal production circuit. By manipulating the first and second switches, the rectifier sends either a full-wave rectified signal or a half-wave rectified signal to the control signal production circuit which determines the output of the control signal production circuit. The control signal production circuit may be connected to an electronic ballast which varies the power level of the lamp according to this output.

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patent: 6784622 (2004-08-01), Newman et al.
patent: 6963178 (2005-11-01), Lev et al.

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