Electron beam deflection device for cathode ray tube
US6346769B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Feb 7, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/7038
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron beam deflection device for a cathode ray tube in which the power for deflecting an electron beam may be reduced easily and convergence may be adjusted easily. The electron beam deflection device has a horizontal deflection yoke and a vertical deflection yoke which are arranged at different positions relative to each other in the fore-and-aft direction. A first core constituting the horizontal deflection yoke is of a flat annular shape. The upper and lower inner surfaces of the first core operate as opposing magnetic poles. A second core constituting the vertical deflection yoke may be of a flat annular shape or of a circular or square annular shape. The forward or rear end of the first core or the forward or rear end of the second core is provided with a cut-out for adjusting the convergence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.