Color picture tube apparatus
US7129627B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2004 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Feb 11, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/76
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ferrite core constituting a deflection yoke includes a plurality of convex portions in a ridge shape on an inner surface thereof. Among the plurality of convex portions, assuming that the convex portions in a range excluding a range of −20° to +20° with respect to a horizontal axis and a range of −20° to +20° with respect to a vertical axis are diagonal convex portions, the lengths in a tube axis direction of at least horizontal axial convex portions on a horizontal axis or vertical axial convex portions on a vertical axis are larger than those of the diagonal convex portions. Because of this, a color picture tube apparatus with a deflection power reduced can be provided while the degree of freedom in a winding arrangement of deflection coils is secured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.