Cathode ray tube apparatus
US6054804A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1997 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Nov 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0015
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cathode ray tube apparatus that can reduce the leakage extraneous electric field with low cost. The cathode ray tube apparatus comprises a front panel, a glass bulb having a funnel part including an anode terminal at the outer surface thereof and a neck part including an electron gun, a deflection apparatus comprising a horizontal deflection coil on the outer surface of the funnel part and the neck part of the glass bulb, a flyback transformer connected to the anode terminal of the funnel part via a first lead wire having an insulating coating, and a leakage extraneous electric field controller installed on the first lead wire. The controller reduces the leakage of the extraneous electric field from the first lead wire. It is preferable that the leakage extraneous electric field controller comprises a negative pulse generator generating negative pulses having a reverse polarity and a synchronized period with respect to the horizontal deflection voltage signal of the horizontal deflection coil, a conductor at least partially surrounding the insulation coated first lead wire, and a second lead wire connecting the negative pulse generator and the conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.