Lamp including phase-control power controller with digital...

Details Lamp including phase-control power controller with digital... Lamp including phase-control power controller with digital...

H - Electricity

05

B

H05B 37/00 (2006.01) H05B 39/00 (2006.01)

Patent

CA 2528397

A phase-control power controller that converts a line voltage to an RMS load voltage includes a phase-control circuit with a potentiometer and a capacitor whose resistance and capacitance determine clipping of a load voltage, a load sensing circuit that senses the load voltage and provides a DC signal that is different from but related to the RMS load voltage, and a comparator circuit that compares the DC signal to a reference and adjusts the resistance of the potentiometer to control the RMS load voltage. The power controller may be in a voltage conversion circuit that converts a line voltage at a lamp terminal to the RMS load voltage usable by a light emitting element of a lamp.

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