Core for deflection yoke and its production method
US6696907B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2001 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Sep 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/7032
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A deflecting yoke core with which magnetic saturation is prevented by optimizing the relationship between the core sectional area and the density of the magnetic flux distribution. The deflecting yoke core to be mounted between a neck and a funnel of a cathode ray tube has a hole 2 extending from an opening end of a neck portion 3 to an opening end of a funnel portion 1. The hole 2 at the funnel portion 1 widens toward the opening end of the funnel portion 1. An outer shape at the opening end of the funnel portion 1 has a short diameter Dx1 along a minor axis X and a long diameter Dy1 along a major axis Y. Core sectional areas along a plane parallel to and passing through a core axis O1 are largest within an angular range of 30° to 65° measured around the core axis O1 from a 0° reference angle at the minor axis X.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.