Method of driving discharge lamp, driving device, and projector
US8044602B2 · kind B2 · utility
7Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2009 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | May 15, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for driving a discharge lamp that supplies an AC current to a discharge lamp having a first electrode and a second electrode so as to produce discharge and to cause the discharge lamp to emit light includes, during a steady operation in which the AC current is supplied to the discharge lamp, changing a difference between the absolute values of average current values for two polarities during one cycle of the AC current in accordance with a predetermined pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.