Display system utilizing beam shape correction
US3984723A · kind A · utility
15Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1974 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Oct 4, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/76
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A color picture reproducing tube utilizes three coplanar electron beams. Convergence of the three beams along at least one axis is accomplished by a deflection assembly producing a magnetic deflection field with particular astigmatism characteristics which also elliptically distorts each of the three beams in a first direction. The electron gun assembly within the picture tube includes apertured electrodes which predistort the beams elliptically in a second direction orthogonal to the first direction of distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.