Field emission type cold cathode structure and electron gun using the cold cathode
US6680564B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 2001 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Jan 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J1/3044
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A field emission type cold cathode structure and an electron gun using the cathode are provided. The electron gun is capable of preventing electron emission error due to impurities etc. The electron gun includes a fusible metal layer formed between a base electrode and each emitter chip, a focus electrode formed on the upper portion of a gate electrode with an insulating layer therebetween, and a control electrode formed on the upper portion of a focus electrode with an insulating layer therebetween. The electron gun so constructed can reduce power for heating the cathode, display data and a picture instantly on a screen, simplify a structure of an electron lens etc. focusing an electron beam, and improving precision in electron gun assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.