Electron gun with afterglow eliminator
US4604548A · kind A · utility
0Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1980 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | May 29, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/503
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is an improvement in an electron gun for use in a cathode ray tube. Such gun includes at least one cathode and a plurality of electrodes spaced from the cathode. At least two of the electrodes form a main focusing lens and the electrode nearest the cathode which forms the main focusing lens includes extrusions about an aperture therein. The improvement comprises means located at the end of the gun opposite the cathode for blocking the exit from the gun of electrons emitted from the extrusions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.