Title:
OPTICAL DISC DATA ERASING DEVICE AND OPTICAL DISC DATA ERASING METHOD
Document Type and Number:
WIPO Patent Application WO/2002/067249
Kind Code:
A1
Abstract:
Data recorded on a write once read many recording disc, e.g. a CD-R disc can be completely erased easily at a low cost by executing overwrite on the recorded area. It is judged whether a loaded optical disc (111) is a write once read many type or not. If it is not a write once read many optical disc (111), disc record information recorded on the optical disc (111) is acquired according to the instruction of a host computer (21). The recorded area of the optical disc (111) is overwriten by irradiating it with a laser beam of a recording power equal to, or higher than, the recording power of the recording mode, thus erasing the recorded data.
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Inventors:
YOKOKAWA TSUYOSHI
Application Number:
PCT/JP2001/007864
Publication Date:
August 29, 2002
Filing Date:
September 11, 2001
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
International Classes:
G11B7/0045; G11B7/0055; G11B23/50; G11B19/12; (IPC1-7): G11B7/0055; G11B19/12
Foreign References:
| US6091686A | 2000-07-18 | |||
| EP0273421A2 | 1988-07-06 | |||
| US5508986A | 1996-04-16 | |||
| JPH05290381A | 1993-11-05 | |||
| JPH01213834A | 1989-08-28 | |||
| JPS63229626A | 1988-09-26 | |||
| JP2001209944A | 2001-08-03 | |||
| US5561825A | 1996-10-01 |
Attorney, Agent or Firm:
Hayase, Kenichi (Enoki-cho Suita-shi Osaka, JP)
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