Enhanced brightness of flat fluorescent lamp
US6218776A · kind A · utility
5Cited by
20References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flat fluorescent lamp exhibits increased brightness through selective angular tuning of emitted light. A diffuse channel is formed in a substrate such that the upper portions of the channel walls taper inward toward the diffuse channel cavity to cause light to be emitted from the lamp in a more intense cone of viewable light over a narrow range of viewable angles. The interior of the channel may be at least partially covered by additional materials, such as a reflective material for enhancing brightness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.