Optical disc having a plurality of recording layers
US9928868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2015 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Mar 2, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1238
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc including at least three layers of recording layers that each record information in an information track. The recording layer includes: an inner circumferential side region positioned on the inner circumferential side; a data region which is positioned to the outer circumferential side of the inner circumferential side region and records content information; and an outer circumferential side region positioned to the outer circumferential side of the data region. The content information is recorded in the data region of the three or more layers, and a point on an upper layer and a point on a lower layer one layer below the upper layer at which playback switches from content information of the upper layer being played back in an inner circumferential direction to content information of the lower layer, are set to be more to the outside than an innermost circumferential position of the data region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.