Field emission device with change in emission property
US7365481B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2002 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Dec 10, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/304
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A field emission device having cold cathode devices including an emitter and a lead electrode, and the field emission device is provided with the plural kinds of cold cathode device groups classified based on the emission property of the cold cathode device. This field emission device has a member for allowing the cold cathode device group to perform emission by successively changing the cold cathode device group that mainly performs emission based on the difference in the emission property. Thus, it is possible to maintain the emission current at a predetermined necessary value or more and to realize the long lifetime of the field emission device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.