High pressure discharge lamp lighting apparatus
US8164266B2 · kind B2 · utility
3Cited by
1References
1Claims
0Family size
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Key dates
| Filing date | Nov 13, 2009 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Mar 14, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high pressure discharge lamp lighting apparatus includes a high pressure discharge lamp and a power supply apparatus, wherein in a steady state lighting operation, an alternating current of a steady state lighting frequency and alternating current of a low frequency are supplied by turns to the high pressure discharge lamp, and wherein in a small electric power lighting in which electric power to be applied is smaller than that of the steady state lighting, alternating current of a small electric power lighting frequency and direct current are supplied by turns to the high pressure discharge lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.