Self-ballasted fluorescent lamp
US6225742A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2000 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Aug 17, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high wattage self-ballasted fluorescent lamp includes a fluorescent tube including a pair of electrodes inside, an electronic ballast circuit portion, an outer bulb, a resin case and a lamp base. (i) The outer bulb has an outer diameter of 60 mm to 70 mm, an outer diameter of a bottom portion of 50 mm to 58 mm, and a total length of 73 mm to 85 mm. (ii) The resin case has an outer diameter of 50 mm to 58 mm. (iii) The total length of the self-ballasted fluorescent lamp is not more than 148 mm. The fluorescent tube has a distance between the electrodes of 450 mm to 540 mm and an inner diameter of 8.0 mm to 10.0 mm, and is operated at a lamp current of not more than 220 mA. Thus, the self-ballasted fluorescent lamp can be compact so that the light fixture application ratio can be improved. Moreover, the self-ballasted fluorescent lamp has a lifetime as long as 6000 hours and a lamp efficiency as high as 66 lm, and the power consumption can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.