Optical drive
US8391124B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2010 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Dec 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1267
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical drive according to the present invention can write information on an optical disc, which includes a substrate on which a number of pre-pits (2) have been formed on its tracks (t1 to t8) and a recording film that is supported on the substrate. The optical drive includes an optical pickup, and a writing control section for controlling the optical pickup so that marks (3a, 3b) are recorded on the tracks (t1 to t8) so as to overlap with some of the pre-pits (2) and for making the optical pickup irradiate the recording film with a writing light beam. The recorded marks (3a, 3b) overlap with at least ten of the pre-pits (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.