Color picture tube having improved electron gun
US4634923A · kind A · utility
2Cited by
15References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1979 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Nov 15, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/707
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved color picture tube has an inline electron gun for generating and directing three electron beams, comprising a center beam and two outer beams, along coplanar paths toward a screen of the tube. The three beams pass through a deflection zone adapted to have vertical and horizontal magnetic deflection fields established therein. The improvement comprises the inclusion of means for nonlinearly increasing the effect of the vertical magnetic deflection field on the center beam relative to the outer beams with increasing angles of vertical deflection of the beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.