Image distortion correction method and apparatus
US4673986A · kind A · utility
5Cited by
9References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Nov 4, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/2335
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for compensating for video image distortion on a cathode ray tube (CRT) is accomplished by determining the distortion occurring along one axis of deflection of the CRT electron beam. The distortion is determined by predicting the position of the electron beam during a particular scan along the axis of deflection. The rate at which video image information is displayed (pixel rate) via the electron beam is varied according to the predicted position of the electron beam during the scan along the axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.