Optical head position control for optical recording device
US6873577B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/085
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
a data player or a method in which a reading and/or writing head is positioned according to anyone of 3 methods or combinations thereof: Calculating a desirable speed curve to position the head from a first to a second position and adjust the speed of the head's movement to the desirable speed, calculating and outputting an amount of energy to a driving mechanism to move the head a determined number of steps, increasing the power applied to a driving mechanism until the head is moved for one step. The positioning may additionally be used to perform coarse positioning while the head is positioned on a track of a data medium using a fine positioning mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.