Color picture tube device in which YH misconvergence is corrected
US6759815B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2002 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Aug 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A group of an upper coma correction coil and an upper four-pole coil is positioned in opposition to a group of a lower coma correction coil and a lower four-pole coil, with respect to an electron beam. A first circuit is composed of a circuit in which the lower four-pole coil and a first diode are connected in series is connected in parallel to the upper coma correction coil. A second circuit is composed of a circuit in which the upper four-pole coil and a second diode are connected in series is connected in parallel to the lower coma correction coil. The first circuit and the second circuit connected in series compose a YH correction circuit. The first diode and the second diode are positioned so as to have opposite polarities. Vertical deflection current is diverted to the YH correction circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.