Deflection yoke and CRT device
US6838811B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2003 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Jul 30, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/7031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides a deflection yoke comprising: a funnel-shaped core (ii) being made of a magnetic material, (iii) having, on its inner wall, ridges each of which starts from the narrower end and extends toward the wider end for a part of the length of the core, the ridges being arranged circumferentially at intervals and thereby forming core slots, and (iv) in which the remaining inner wall near the wider end is smooth; a first deflection coil wound as partially guided by the core slots; second deflection coil positioned more inward than the first deflection coil; and an insulating frame that (i) is sandwiched between the first and second deflection coils, and (ii) has, in an area corresponding to the core's smooth area, guiding slots extending along the CRT axis direction and being arranged circumferentially, wherein the second deflection coil is wound as partially guided by the guiding slots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.