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AssigneeOsram Sylvania Inc.
InventorsMatthew B. Ballenger, George B. Kendrick
Estimating the term…
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.
A lamp comprising a lamp voltage converter in the lamp and connected between a lamp terminal and a light emitting element, said voltage converter converting a first line voltage at said lamp terminal to a load voltage that operates said light emitting element, said voltage converter including phase-controlled dimming means for reducing an RMS load voltage at said light emitting element, said phase-controlled dimming means includes means for varying a resistance in said voltage converter in reaction to variation of the first line voltage.
An incandescent lamp comprising:
Dependencies are inferred from the claim text.