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US 8,014,236 B2Granted
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
AssigneePanasonic Corporation
InventorsYoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi, Mitsuro Moriya
Life of this patent
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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.
Claims5
An optical disk, comprising:
- an information recording area;
- a barcode-like mark area provided for barcode-like mark including a plurality of bars, each of said bars extending in a radial direction;
- and
- an identifier indicating whether said barcode-like mark on the barcode-like mark area is present or not, said identifier being recorded on said information recording area,
- where the barcode-like mark area is located at an inner side of the optical disk than the information recording area.
2 more elements
An optical disk, comprising:
- a barcode-like mark area;
- and
- an identifier recorded on said optical disk and separated from said barcode-like mark area, said identifier indicating whether a barcode-like mark is present or not on said barcode-like mark area,
- wherein said barcode-like mark area is provided for said barcode-like mark including a plurality of bars, each of said bars extending in a radial direction.
1 more element
Dependencies are inferred from the claim text.