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

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

2006-10-24

2006-10-24

Lee, Wilson (Department: 2163)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315S225000, C315S194000

Reexamination Certificate

active

07126287

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 plural resistors connected to each other in parallel, each of the resistors being series-connected to a respective fuse, each of which has a different breaking current corresponding to voltage present at the line. A resistance in the phase-controlled dimming circuit is fixed by breaking at least one fuse in response to the first voltage. 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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