Discharge lamp lighting device, projector, and driving method of discharge lamp
US8853961B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2011 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Mar 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2928
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In at least one embodiment of the disclosure, a discharge lamp lighting device includes a discharge lamp driving section that drives a discharge lamp and a control unit that controls the discharge lamp driving section. The control unit alternately performs a first-interval DC driving process and a first-interval AC driving process in a first interval, alternately performs a second-interval DC driving process and a second-interval AC driving process in a second interval other than the first interval, and changes a length of at least one of a period during which the first-interval DC driving process is performed and a period during which the second-interval DC driving process is performed so as to be shortened in a stepped manner within a predetermined sub-interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.