Vehicular lamp
US7164235B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2004 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Jul 21, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vehicular lamp, including: a plurality of semiconductor light emitting devices connected in parallel; a plurality of current limiting units provided corresponding to the plurality of semiconductor light emitting devices, wherein the plurality of current limiting units connect with the corresponding semiconductor light emitting devices respectively in series, and limit electric current flowing through the corresponding semiconductor light emitting devices respectively; and a current control unit for changing electric current to be supplied to at least one of the plurality of semiconductor light emitting devices. When a wire of one of the plurality of semiconductor light emitting devices is broken, the current control unit increases the electric current to be supplied to at least one of the plurality of semiconductor light emitting devices of which a wire is not broken by causing at least a part of the electric current to flow via a path connected in parallel with corresponding one(s) of the plurality of current limiting units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.