JPS6459665A - Optical disk device - Google Patents

Optical disk device

Info

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
Application number
JP21682687A
Other languages
Japanese (ja)
Inventor
Noriyuki Kikuchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP21682687A priority Critical patent/JPS6459665A/en
Publication of JPS6459665A publication Critical patent/JPS6459665A/en
Pending legal-status Critical Current

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.
JP21682687A 1987-08-31 1987-08-31 Optical disk device Pending JPS6459665A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62120663A (en) * 1985-11-20 1987-06-01 Matsushita Electric Ind Co Ltd Record protecting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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