Luminaire using incandescent lamp as luminous source
US5343122A · kind A · utility
30Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1991 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Aug 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a novel luminaire wherein a switching power supply circuitry is used to operate one or more incandescent lamps at a dc voltage exceeding their rating. The luminaire emits a flickerless light with a color temperature of about 2,900 K. or higher which is natural, closer to sunlight, superior in color rendering properties, gentle to the eyes, therefore very useful in illumination. The switching power supply circuitry exhibits a high power efficiency and capacity, and the output voltage is easily regulatable to a desired magnitude for lamp dimming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.