Raster distortion correction circuit
US4896082A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1989 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Jun 7, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a circuit arrangement for correcting a raster distortion in a cathode ray tube, at least one vertical perforated, index strip of a sensor is arranged at a corresponding margin of a picture producing screen of the cathode ray tube. An index signal that is indicative when the electron beam passes the index strip is generated. The index signal is coupled through an enclosure of the cathode ray tube in a nonconductive manner to a second electrode that is located outside the enclosure. A comparator circuit is used for comparing the index signal with a line deflection representative signal to generate a control signal that corrects the raster distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.