JPS6459665A - Optical disk device - Google Patents
Optical disk deviceInfo
- Publication number
- JPS6459665A JPS6459665A JP21682687A JP21682687A JPS6459665A JP S6459665 A JPS6459665 A JP S6459665A JP 21682687 A JP21682687 A JP 21682687A JP 21682687 A JP21682687 A JP 21682687A JP S6459665 A JPS6459665 A JP S6459665A
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- light
- write protection
- recording
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To prevent an optical disk from being erroneously recorded by sensing a write protection seal for shutting off the light to pass through and inhibiting the recording on the optical disk. CONSTITUTION:When the optical disk 1 is under rotation by driving of disk motor 2, a light emitting element 15 emits the light to a light receiving element 16 through a transparent area 13 of the optical disk 1. The write protection seal 18 is stuck on the transparent area 13, so that the light is interrupted in its throwing on the light receiving element 16 once during one rotation of the optical disk 1. This condition is sensed by a write protection circuit 17 to inform a control circuit 9 of the inhibition of recording the optical disk 1. Consequently, a linear motor 7 is stopped in its driving.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21682687A JPS6459665A (en) | 1987-08-31 | 1987-08-31 | Optical disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21682687A JPS6459665A (en) | 1987-08-31 | 1987-08-31 | Optical disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6459665A true JPS6459665A (en) | 1989-03-07 |
Family
ID=16694500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21682687A Pending JPS6459665A (en) | 1987-08-31 | 1987-08-31 | Optical disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6459665A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6151294A (en) * | 1997-08-27 | 2000-11-21 | Parlog, Iii; John | Write protect component for re-writable compact disc |
KR100425818B1 (en) * | 2001-08-18 | 2004-04-03 | 최재우 | Prevented Copy and Erase about a CD apparatus |
US6885627B1 (en) | 1997-03-25 | 2005-04-26 | Hewlett-Packard Development Company, L.P. | Write protect for rewritable compact disks and digital video disks |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62120663A (en) * | 1985-11-20 | 1987-06-01 | Matsushita Electric Ind Co Ltd | Record protecting device |
-
1987
- 1987-08-31 JP JP21682687A patent/JPS6459665A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62120663A (en) * | 1985-11-20 | 1987-06-01 | Matsushita Electric Ind Co Ltd | Record protecting device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6885627B1 (en) | 1997-03-25 | 2005-04-26 | Hewlett-Packard Development Company, L.P. | Write protect for rewritable compact disks and digital video disks |
US6151294A (en) * | 1997-08-27 | 2000-11-21 | Parlog, Iii; John | Write protect component for re-writable compact disc |
KR100425818B1 (en) * | 2001-08-18 | 2004-04-03 | 최재우 | Prevented Copy and Erase about a CD apparatus |
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