Selfballasted fluorescent lamp having specified tube geometry, luminous flux, lamp efficiency and power requirements
US6437502B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Feb 11, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A compact self-ballasted fluorescent lamp (10) which is equivalent to a typical light bulb is provided.The self-ballasted fluorescent lamp (10) includes a cover (14), a lighting circuit (16), an arc tube (18), a base (12) and a globe (17) and formed into a shape whose outline dimensions are nearly identical to the standard dimensions of a typical light bulb. The arc tube (18) is comprised of a plurality of U-shaped bent bulbs (31) which have an inner tube diameter ranging from 6 to 9 min and arranged in parallel with one another. Having a bulb height -ranging from 50 to 60 mm and a discharge path from 200 to 300 mm long, the arc tube (18) is designed such that the total luminous flux is not less than 700 1m with a lamp efficiency of not less than 60 lm/W when the lamp is lit at the lamp power of 7 to 15 W, An envelope (19) comprising the cover (14) and the globe (17) has a height ranging from 110 to 125 mm including the height of the base (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.