| US 7,352,134 B2 | ||
| Lamp containing fixed reverse phase switching power supply with time-based phase pulse triggering control | ||
| Matthew B. Ballenger, Lexington, Ky. (US); and Ernest C. Weyhrauch, Cookeville, Tenn. (US) | ||
| Assigned to Osram Sylvania Inc., Danvers, Mass. (US) | ||
| Filed on Feb. 04, 2005, as Appl. No. 11/50,968. | ||
| Prior Publication US 2005/0110433 A1, May 26, 2005 | ||
| Int. Cl. H05B 37/02 (2006.01) | ||
| U.S. Cl. 315—209SC [315/209 R; 315/224; 315/225] | 7 Claims |
| 1. A lamp comprising a lamp voltage conversion circuit within the lamp and connected to a lamp terminal,
said voltage conversion circuit including a 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.
|