Discharge lamp driving device and method, light source device, and image displaying apparatus
US8581506B2 · kind B2 · utility
2Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2009 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Sep 12, 2032 |
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 driving device includes a discharge lamp lighting unit configured to supply power to a discharge lamp while alternately switching a polarity of a voltage applied across two electrodes of the discharge lamp. A controller performs a modulation control of the power in accordance with a power ratio characterized by the power supplied in a polarity switching period. The controller starts the modulation control at a predetermined time after the power supplied to the discharge lamp reaches a predetermined power value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.