Discharge bulb and method of manufacturing the same
US6653764B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2002 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Nov 5, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J5/54
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A base end 12a of an arc tube unit 12 is inserted in a glass tube 50 which is previously fixed to an insulating plug unit 14, and a shroud tube 18 and the glass tube 50 are then bonded and fixed to each other in such a state that an amount of insertion of the arc tube unit 12 is regulated in order to set a dimension L between an optical reference plane Po of the insulating plug unit 14 and the tip position of a bar-shaped electrode 26B of an arc tube 16 to be a predetermined set dimension Lo. Consequently, the arc tube unit 12 can be fixed and supported on the insulating plug unit 14 with a simple structure in a simple process, and furthermore, it is possible to eliminate a possibility that the shroud tube 18 might be damaged, for example, broken by the fastening force of a metal band as in the conventional art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.