Discharge lamp lighting device, projector, and driving method of discharge lamp
US8378581B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2010 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Jun 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2928
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In at least one embodiment of the disclosure, a discharge lamp lighting device comprises a discharge lamp driving section and a control unit. The control unit alternately performs a first DC driving processing and a first AC driving processing in a first section of the driving current. The control unit alternately performs a second DC driving processing and a second AC driving processing in a second section of the driving current different from the first section. The control unit temporally changes a length of at least one of: (i) a period for which the first DC driving processing is performed, and (ii) a period for which the second DC driving processing is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.