Projector and driving method of light source for projector
US7800314B2 · kind B2 · utility
7Cited by
0References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 2008 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Jan 14, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projector includes an discharge lamp which has a first electrode and a second electrode and emits light by generating discharge between the first and second electrodes, and a driving system which supplies power by alternating polarities of the first electrode and the second electrode. The driving system is operable in a restoration mode. The driving system melts surface layers of a tip and a surrounding area of the tip extending from a main body of one of the first and second electrodes, and expands a new tip on a tip area of the main body of the one electrode in the restoration mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.