Storage device, control method, control device, and program
US7835104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2006 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Sep 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heater for changing a projection distance protrusion value by thermal expansion accompanying electric-power-distributed heating is provided in a head having at least a reading element. At desired correction timing, a changed distance detection unit measures a clearance changed distance in a state in which the head is positioned to a track on the recording medium while increasing the amount of electric power distributed to the heater. A contact determination unit determines that the head is brought into contact with the recording medium when a derivative value of the clearance changed distance is below a predetermined threshold value. A measurement output unit outputs the clearance changed distance detected by the changed distance detection unit at the time of contact determination of the contact determination unit as a measurement result of the clearance between the reading element and the recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.