Driving method for discharge lamp, driving device for discharge lamp, light source device, and image display apparatus
US8120285B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2009 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Oct 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In at least one embodiment of the disclosure, a driving device for a discharge lamp includes an alternating current supply section and a frequency switching section. The alternating current supply section supplies two electrodes of the discharge lamp with an alternating current. The alternating current includes a plurality of modulation periods with each modulation period including a highest frequency term and a lowest frequency term. The frequency switching section varies a frequency of the alternating current non-monotonically between the highest frequency term and the lowest frequency term of the modulation period in response to a predetermined condition being satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.