Dispenser cathode
US5126623A · kind A · utility
5Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1990 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Dec 31, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dispenser cathode comprises an electron emissive materials, a porous base body containing tungsten, a reservoir storing the porous base body, and a sleeve storing the heater therein. The porous base body contains TiO.sub.2 or ZrO.sub.2. The dispenser cathode achieves high luminance and high definiteness required by a large-sized display and the time for manufacturing the cathode is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.