Emissive flat panel display with improved regenerative cathode
US5764004A · kind A · utility
Inventor
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2329/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Method and apparatus are presented for the generation, regeneration, and transplantation of field enhancing whiskers to provide for an improved cathode in flat panel displays in particular, and in other applications. Such applications comprise devices in which there is an emissive cathode structure for producing electrons. There are clear advantages for the instant invention in the case of a flat panel display which requires a relatively large cathode area, because the present invention avoids excessive power loss due to radiation and conduction loss by permitting operation of the cathode at a significantly lower temperature than if it operated solely as a thermionic emitter. The combination of moderately elevated temperature and enhanced electric field allows the advantages of thermo-field assisted emission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.