Vessel shapes and coil forms for electrodeless discharge lamps
US5734221A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1993 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Oct 19, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge vessel for an electrodeless lamp having a pair of substantially parallel front and back walls. In one implementation, the front wall of the discharge vessel has a collimating structure, e.g a fresnel lens, for directing the light in a preferential direction such as in a flood light. In another implementation, the flat discharge vessel is quadrilateral and together with one or more quadrilateral excitation coils can be used as a backlight for a flat panel display. In yet another implementation, a cup-shaped discharge vessel with a collimating structure on the front wall is used in an electrodeless lamp for a task lighting such as a spot light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.