Title:
OPTICAL DISK RECORDING/REPRODUCTION DEVICE AND DISK DETERMINATION METHOD FOR OPTICAL DISK RECORDING/REPRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/009082
Kind Code:
A1
Abstract:
An optical disk recording/reproduction device and a disk determination method for an optical disk recording/reproduction device. The disk determination method compares with a threshold value a drive value when the arrival of a focus point at a recording surface is detected during a focus search relative to an optical disk (301) or a drive value during an on-focus state. By this, two or more kinds of optical disks having different substrate thicknesses are determined. The threshold value is determined based on a drive value during an on-focus state when one or more kinds of disks out of the two or more kinds of optical disks become reproducible.
Inventors:
TAKAHASHI YORIO
AITANI MAKOTO
AITANI MAKOTO
Application Number:
PCT/JP2005/013070
Publication Date:
January 26, 2006
Filing Date:
July 14, 2005
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
TAKAHASHI YORIO
AITANI MAKOTO
TAKAHASHI YORIO
AITANI MAKOTO
International Classes:
G11B19/12; G11B7/004; G11B7/085; G11B7/09; (IPC1-7): G11B7/085; G11B7/004; G11B7/09; G11B19/12
Foreign References:
| JP2000243020A | 2000-09-08 | |||
| JPH09293321A | 1997-11-11 | |||
| JP2000242932A | 2000-09-08 | |||
| JPH09306087A | 1997-11-28 |
Attorney, Agent or Firm:
Morimoto, Yoshihiro (4th Floor 10-10, Nishi-Hommachi 1-chome, Nishi-k, Osaka-hi Osaka 05, JP)
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