Power adjustment method, information write method and information write medium
US8164996B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2011 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Sep 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1267
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An evaluation method and print wire method which includes (a) fitting a modulation characteristic formula M,m=Msat (1−(Pws−Pasy)/(Pw,m−Pasy)) having a saturated modulation Msat, write start power Pws, and asymptotic power Pasy as parameters to a relation between a plurality of kinds of write power Pw,m and a modulation M,m which is obtained from a signal amplitude of a trial-written signal, and finding an index value of an error which occurs in the fitting step; and (b) evaluating whether or not the relation between the write power and the modulation is valid for write power adjustment by using the index value of the error and a predetermined value the print write method further including (c) setting the write power based upon the result of evaluating and executing a write power process with the set write power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.