Light source device, projector, and driving method of discharge lamp
US8203280B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Dec 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2928
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To prevent biased consumption of electrodes in a discharge lamp and to prevent biased precipitation of the electrode material, a light source is provided. The light source device has a discharge lamp that emits light by discharge between a first electrode and a second electrode; and a driver that supplies alternating current to the first and the second electrodes so as to maintain the discharge, and changes duty ratio of the alternating current in accordance with predetermined pattern. The predetermined pattern includes a plurality of section periods for which the duty ratio maintains mutually different values for a predetermined period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.