Invention Grant
- Patent Title: Optical disc and optical disc device
- Patent Title (中): 光盘和光盘设备
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Application No.: US12088460Application Date: 2006-11-22
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Publication No.: US08149671B2Publication Date: 2012-04-03
- Inventor: Takahiro Sato , Takeshi Shimamoto , Katsuya Watanabe
- Applicant: Takahiro Sato , Takeshi Shimamoto , Katsuya Watanabe
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- Priority: JP2005-336543 20051122
- International Application: PCT/JP2006/323282 WO 20061122
- International Announcement: WO2007/060975 WO 20070531
- Main IPC: G11B20/00
- IPC: G11B20/00

Abstract:
An optical disc drive according to the present invention can read and/or write data from/on an optical disc with information layers including first and second information layers (L0 and L1). The drive includes: an objective lens for converging a light beam; a lens actuator for driving the lens; a photodetector section that receives the beam reflected from the disc and converts it into an electrical signal; and a control section for determining the values of a first group of parameters, which are set to read data from the first layer (L0), and those of a second group of parameters, which are set to read data from the second layer (L1), during a disc loading process. In performing the disc loading process, the control section determines the values of the first group of parameters, and then determines the values of the second group of parameters based on correlation information, representing correlation between the values of the first and second groups of parameters that were set during a previous disc loading process, and on the values of the first group of parameters that have been just determined during the current disc loading process.
Public/Granted literature
- US20090154324A1 OPTICAL DISC AND OPTICAL DISC DEVICE Public/Granted day:2009-06-18
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