Device for correcting the deflection effect due to a variation of the focusing voltage in a trichromatic cathode ray tube with in line cathodes
US4812706A · kind A · utility
7Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1986 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Nov 19, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/4872
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To avoid the deflection phenomenon of the red and blue spots of a trichromatic tube with in line cathodes, as a function of a variation of the focusing voltage, the holes corresponding to these two colors are enlarged over a distance of about 0.1 to 0.2 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.