Invention Grant
- Patent Title: Optical information recording and reproducing method and optical information recording and reproducing apparatus
- Patent Title (中): 光信息记录和再现方法以及光信息记录和再现装置
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Application No.: US12826775Application Date: 2010-06-30
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Publication No.: US08174954B2Publication Date: 2012-05-08
- Inventor: Koichi Watanabe
- Applicant: Koichi Watanabe
- Applicant Address: JP Tokyo
- Assignee: Hitachi-LG Data Storage, Inc.
- Current Assignee: Hitachi-LG Data Storage, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2009-159175 20090703
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
An optical information recording and reproducing method for recording or reproducing information by irradiating pulsed laser diode light from a laser diode (LD) light source in which the resistance value of the LD light source is measured in an operating state, the measured LD light source resistance value is compared with a target resistance value, and the LD light source is heated when the LD light source resistance value is higher than the target resistance value, in order to maintain the LD light source resistance at a specified value or less.
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