Self-converging deflection yoke
US4246560A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1978 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Sep 18, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/703
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A deflection yoke for use with a picture tube of a television receiver. A vertical deflection coil of the deflection coil has a larger winding angle on an electron gun side thereof than on a screen side thereof. A magnetic material piece is disposed inside the vertical deflection coil so that a vertical deflection magnetic field is formed into a strong barrel magnetic field on the electron gun side. As a result, a raster scanned on a faceplate of the picture tube is free from misconvergence and pincushion distortion. A core of the deflection yoke has sawtooth-shaped end surfaces, or auxiliary rings having sawtooth-shaped end surfaces are disposed on the end surfaces of the core. As a result, a wire of the vertical deflection coil is prevented from slipping on the end surfaces of the core although the wire of the vertical deflection coil is wound at a large winding angle on the electron gun side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.