Cathode ray tube apparatus
US5880660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/76
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode ray tube apparatus comprising: a deflection yoke comprising a horizontal deflection coil that forms the pin cushion distortion as a whole; a vertical deflection coil that forms the barrel distortion as a whole: a resin frame provided around the periphery of the horizontal deflection coil, which insulates and fastens the horizontal deflection coil and the vertical deflection coil; and a ferrite core provided around the periphery of the vertical deflection coil to strengthen the magnetic flux and the length of part of cone portion of the horizontal deflection coil at the side of the screen whose winding angle is not less than 0 degree nor more than 30 degree with respect to the reference line is 25 mm or longer as measured from the reference line. This cathode ray tube apparatus can correct the pin cushion distortion of raster in the upper-and-lower side of the picture for flattened and increased deflection angle cathode ray tubes with the deflection yoke itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.