Electron gun for a color cathode ray tube
US5300855A · kind A · utility
32Cited by
5References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/628
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron gun for a color cathode ray tube is formed such that parallel vertical blades are extending toward cathodes formed at both edges of each electron beam passing hole in the outgoing plate of a focus electrode. Horizontal blades extending toward the cathodes at a predetermined length are formed at the edges of the top and bottom portions of electron beam passing holes in the incoming plate of a dynamic focus electrode. Thus, the horizontal blades are inserted into the electron beam passing holes of the focus electrode, which reduces astigmatism due to deflection aberration and improves the focusing characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.