Lamp containing voltage conversion circuit including forward/reverse hybrid phase-control clipping circuit
AssigneeOsram Sylvania Inc.
InventorsGeorge B. Kendrick, Ernest C. Weyhrauch, Matthew B. Ballenger
Life of this patent
Estimating the term…
Abstract
A lamp contains a lamp voltage conversion circuit which includes a forward/reverse hybrid phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control clipping circuit has a time-based pulse source that triggers conduction of the phase-control clipping circuit independently of line voltage magnitude during time periods spanning polarity changes of the load voltage that are separated by intervals when conduction is not triggered.
Claims6
A lamp comprising a lamp voltage conversion circuit within the lamp and connected to a lamp terminal,
- said voltage conversion circuit including a forward/reverse hybrid phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp, said phase-control clipping circuit having a time-based pulse source that triggers conduction of said phase-control clipping circuit independently of line voltage magnitude during time periods spanning polarity changes of the load voltage that are separated by intervals when conduction is not triggered.
Dependencies are inferred from the claim text.