Deflection yoke with coils for reducing unwanted magnetic field radiation
US5907214A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 6, 1996 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Dec 6, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0023
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode ray tube display device including unnecessary radiating magnetic field reducer which improves the ability to reduce an unnecessary radiating magnetic field, especially, generated by a vertical deflection coil. A pair of coil is disposed in opposing relationship on the opposite sides of the ferrite core along an X-axis or in the horizontal direction of the deflection yoke so as to be in contact with an open side end of the ferrite core. Each coil has a shape curved with a predetermined radius of curvature conforming to the shape of the outer peripheral surface of the ferrite core. The ferrite core acts as a magnetic material for the coils which reduces the unnecessary radiating magnetic fields to increase the coil inductances to thereby produce a large extremely low frequency magnetic field (ELMF) reducing effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.