Title:
DISC RECORDER/REPRODUCER
Document Type and Number:
WIPO Patent Application WO/2002/061744
Kind Code:
A1
Abstract:
A disc recorder/reproducer comprising a laser drive circuit (15) which can regulate the power of laser light by supplying a drive signal to an optical head (4), an error correction circuit (11) for detecting the error rate of a reproduced signal, and a system controller (10) for controlling operation of the laser drive circuit based on the output from the error correction circuit. The system controller registers the relation between an optical laser power where the error rate does not exceed a predetermined value and the disc temperature on a management table. At the time of setting a laser power, an optimal laser power can be set depending on the variation of disc temperature by reading out an optimal laser power corresponding to the of disc temperature from the management table.
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| JPH0476842 | MAGNETIC FIELD MODULATION MAGNETO-OPTICAL DRIVE DEVICE |
Inventors:
ASANO KENJI (JP)
SAKAI SHUJI (JP)
BABA HIDEHARU (JP)
SAKAI SHUJI (JP)
BABA HIDEHARU (JP)
Application Number:
PCT/JP2002/000612
Publication Date:
August 08, 2002
Filing Date:
January 28, 2002
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
ASANO KENJI (JP)
SAKAI SHUJI (JP)
BABA HIDEHARU (JP)
ASANO KENJI (JP)
SAKAI SHUJI (JP)
BABA HIDEHARU (JP)
International Classes:
G11B11/105; G11B7/0045; G11B7/005; G11B7/125; G11B7/1267; H01S5/068; (IPC1-7): G11B7/125; G11B7/0045
Foreign References:
| JPH03276430A | 1991-12-06 | |||
| JPH06162508A | 1994-06-10 | |||
| JPH06267073A | 1994-09-22 |
Attorney, Agent or Firm:
Nishioka, Nobuyasu (Uchihonmachi 2-chome Chuo-ku Osaka-shi, Osaka, JP)
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