Discharge lamp lighting device, headlight device and vehicle having the same
US8089215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2009 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Aug 26, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2882
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge lamp lighting device includes: a DC power source; an inverter for inverting the DC power at a predetermined inversion time interval to supply a square wave AC power to a discharge lamp; and a controller for controlling the output power. The controller performs a synchronous operation and controls the DC power source such that DC power outputted during a period other than the output temporarily increasing period in a power increasing period is greater than the DC output power outputted during the period other than the output temporarily increasing period in a rated power period. Further, the controller controls the DC power source such that at least one of an increment of the output power for the output temporarily increasing period and a length of the output temporarily increasing period is less in at least a part of the output increasing period than in the rated power period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.