Light module for a motor vehicle headlamp and method and electrical circuit for operating same
US8878446B2 · kind B2 · utility
2Cited by
1References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 11, 2011 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Oct 11, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method operates a light source of a motor-vehicle headlight with direct current. The light source is actually designed for operation with alternating current. The light source comprises an inductive load and is arranged between bridge sections of an electrical H-bridge circuit having four semiconductor switches. During “alternating current” operation, the light source is supplied with the alternating current via the H-bridge circuit. Two of the semiconductor switches are arranged at a top and actuated via a respective bootstrap circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.