Method of operating a lamp containing a fixed phase power...

Details Method of operating a lamp containing a fixed phase power... Method of operating a lamp containing a fixed phase power...

2007-05-29

2007-05-29

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S056000, C315S072000, C323S217000

Reexamination Certificate

active

11051944

ABSTRACT:
A method of operating a lamp that has a power controller connected between a terminal and a light emitting element that converts the line voltage to an RMS load voltage. An input to an analog control block is provided in the controller that is independent of a change in magnitude of the line voltage. A trigger signal from the analog control block is provided at a first frequency by charging and discharging a capacitor in the analog control block that receives the input. An initial condition of the analog control block is resetted periodically. A sync signal synchronizes the trigger signal with a waveform of the line voltage. A load voltage is clipped based on the synchronized trigger signal to define the RMS load voltage.

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