Electron gun for a cathode ray tube
US5773925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1995 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Oct 23, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/4827
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron gun comprising at least one cathode for emitting electrons, a cylindrical device, a first electrode layer provided on the cathode side of inner surface of the cylindrical device, a second electrode layer provided on a panel side of inner surface of the cylindrical device, and a third electrode layer provided between the first electrode layer and the second electrode layer, a ratio of a gap between the second electrode and the third electrode to a gap between the first electrode and the third electrode being defined more than 1, wherein the ratio of the gap between the second electrode and the third electrode to the gap between the first electrode and the third electrode is 1 to 2, the cylindrical device is made of ceramic, and further comprising at least one resistive layer provided on the inner surface of the cylindrical device, and at least one conductive layer provided between the adjacent electrode layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.