Tubular EL lamp
US5711594A · kind A · utility
22Cited by
13References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1994 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Nov 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D13/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An EL lamp includes a strip of EL material within a translucent cylinder, preferably a glass tube. The tube can be frosted or coated to further enhance the appearance of the lamp. The strip can be flat or curved and, in an alternative embodiment of the invention, the lamp includes a glass fiber between the light emitting surface of the strip and the tube for gathering light from the strip and emitting the light in a preferred direction. The tube is an optical element combined with the strip to produce the unexpected result of having the tube appear luminous, even without coatings to enhance this effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.