Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
US7520001B2 · kind B2 · utility
18Cited by
31References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2006 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Apr 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recorded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.