Tracking-error correcting system in a video reproducing apparatus
US4451860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1981 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Oct 6, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/588
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tracking-error correcting system in a rotary head magnetic recording and reproducing apparatus in which the reproducing magnetic heads can move in the direction of their axis of rotation by using a bi-morph leaf having piezoelectric elements. This system can automatically detect the tracking-error between the reproducing head and a recorded track, and move the reproducing head in a direction to attain better tracking position while the head is not in contact with the magnetic tape, so that either head's scanning trace is always parallel to the recorded track. The system is protected from jitter or color flicker on the monitor television screen when the heads move in the direction of their axis of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.