Fluorescent lamp
US7045946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2003 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | May 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/33
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
By hiding at least blackened portions from outside to make visual confirmation thereof impossible, a fluorescent lamp keeps its clean outward appearance until its service life expires and insufficiency of luminance on ends of the fluorescent lamp is dissolved. The fluorescent lamp comprising a plurality of discharging electrodes in a glass tube, and wherein the glass tube comprises an illuminating glass tube portion coated at inner wall surfaces thereof with a fluorescent substance and functioning as an illuminating body, and auxiliary glass tube portions provided contiguous to the illuminating glass tube portion and hidden from outside by shielding members, and wherein the discharging electrodes are not provided in the illuminating glass tube portion but mounted in the auxiliary glass tube portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.