Vehicular lamp
US7244036B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2005 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Oct 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vehicular lamp has light source units connected in parallel, an output controlling switch operable to intermittently carry an electric current by repeating on and off, an output coil operable to output electric power according to current flowing into said output controlling switch in synchronization when said output switch switches, a selection controlling unit operable to select at least one said light source unit in synchronization when said output controlling switch switches and cause said at least one selected light source to receive the power output from said output coil, and a malfunction detecting unit operable to detect malfunction of each of said light source units, wherein said selection controlling unit selects at least one said light source unit among said light source units from which malfunction is not detected when said malfunction detecting unit detects malfunction of either of said light source units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.