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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 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.
A lamp comprising:
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 and fused resistor means for fixing a resistance in said phase-controlled dimming means in reaction to the first line voltage.
An incandescent lamp comprising:
A method of setting a resistance in a voltage converter that is in a lamp and connected to a lamp terminal, the method comprising the steps of:
Dependencies are inferred from the claim text.