Electric discharge lamp with an improved sealing structure improving uniformity of light output and method of making
US6335593B1 · kind B1 · utility
1Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Jan 29, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/265
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric discharge lamp is provided comprising; a lamp envelop including a first and a second sealing tubes both of which are sealed and a light-emitting portion located between the sealing tubes; a pier of electrodes disposed in the light-emitting portion; and a filler substance encapsulated within the lamp envelop, one of the sealing tubes having a seal-cut trace of a tip tube that has been used for introducing the filler substance into the lamp envelop therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.