Electron gun assembly for a color picture tube
US4232246A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1978 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | Feb 15, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/503
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Improvements in an electron gun assembly for a color picture tube comprising three electron guns arranged in an in-line relation, each of said three electron guns having three grid electrodes which have respective cylindrical portions of the same inside diameter and are arranged spacedly from each other on the same axis, and the non-central two of which are kept at the same electric potential. At least one of the non-central two grid electrodes is not required to be provided with an inner electrode so that it consists only of cap electrodes, and height i.e. the axial length of the inside cylinders of the respective cap electrodes of the non-central electron guns and the central electron guns are selected to be individually less than the inside diameter (D) of the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.