Pincushion correction circuit
US4088931A · kind A · utility
9Cited by
2References
42Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1976 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Sep 13, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/233
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A side pincushion correction circuit having an impedance circuit in series with the deflection coil. A controlled switch coupled in a branch of the impedance circuit is operated at times during the second half of the horizontal retrace interval which are progressively advanced during the first half of vertical interval and retarded during second half of vertical interval. Enhanced inside pincushion distortion correction is provided when the impedance circuit includes a capacitor coupled in series with the switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.