Display discharge lamp
US5298834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1991 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Oct 30, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A first display discharge lamp has a transparent airtight container filled with a discharge gas; a positive electrode disposed in the airtight container and supported by a stem having an air tube therein; a negative electrode of an inverted configuration disposed in the transparent airtight container and surrounded by the positive electrode; a lead member integrally formed with the positive electrode, having a bent portion between a lower end of the negative electrode and the stem; and an insulating member disposed between the lower end of the negative electrode and the bent portion of the lead member. According to a second display discharge lamp, both a negative electrode and a positive electrode are of an inverted conical configuration. The former has at least an open upper end, while the latter has an open upper end and an open lower end. A lower end of the positive electrode is inserted in an interior of the negative electrode from the open upper end of the negative electrode. And, a lower/outer periphery of the positive electrode is, in a non-contact condition, opposed to an upper/inner periphery of the negative electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.