Lamp with integral voltage converter having phase-controlled...

Electric lamp and discharge devices: systems – Condenser in the supply circuit – Resistance in the condenser circuit

Reexamination Certificate

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Details

C315S194000, C315S291000, C315S244000

Reexamination Certificate

active

07612504

ABSTRACT:
An incandescent lamp includes a lamp voltage conversion circuit within the lamp and connected to a lamp terminal, where the voltage conversion circuit converts a first line voltage at the lamp terminal to a second RMS load voltage usable by a light emitting element of the lamp. The voltage conversion circuit includes a triac phase-controlled dimming circuit, which in turn includes a voltage controlled resistor that varies a resistance in the phase-controlled dimming circuit as the first voltage varies so as to maintain the second voltage substantially constant. The voltage conversion circuit may be an integrated circuit that is in the lamp base and connected between the lamp terminal and the light emitting element.

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