KR900002266A - 자기광 정보기록 재생장치의 외부자계장치 - Google Patents
자기광 정보기록 재생장치의 외부자계장치 Download PDFInfo
- Publication number
- KR900002266A KR900002266A KR1019890010308A KR890010308A KR900002266A KR 900002266 A KR900002266 A KR 900002266A KR 1019890010308 A KR1019890010308 A KR 1019890010308A KR 890010308 A KR890010308 A KR 890010308A KR 900002266 A KR900002266 A KR 900002266A
- Authority
- KR
- South Korea
- Prior art keywords
- magnetic field
- information recording
- external magnetic
- generating means
- recording medium
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
- G11B11/10504—Recording
- G11B11/10508—Recording by modulating only the magnetic field at the transducer
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 외부자계장치를 표시한 블럭도.
제2도는 제1도에 표시된 장치에서 옵세트 교류와 기록 신호회로로부터 교류출력의 파형도.
제4도는 옵셋트정도가 변화될 때 특성 변화그래프.
Claims (7)
- 기록정보가 자계발생수단에 교류전류를 공급함으로서 조절될 때에 자기광 정보기록 메체에 가해진 외부자계와 기록될 정보에 따라서 변화되는 극성으로 된 장치에 있어서 상기 장치는 상기 교류에서 옵셋트를 발생하는 옵셋트수단을 포함하고 상기 옵셋트는 상기 정보기록매체의 초기자화가 역으로 되므로서 극성의 전류수준을 증가시키도록 한 것을 특징으로 한 자기광 정보기록 재생장치용 외부자계장치.
- 제1항에 있어서, 상기 자계 발생수단이 자기헤드(3)의 자기 코일인 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
- 제1항에 있어서, 상기 극성에 반대극성을 가진 다른 전류수준에 상기 극성을 가진 전류비 수준비가 7:3인 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
- 기록정보가 자계발생수단에 교류를 공급함으로서 조절될 때에 자기광 정보기록 매체에 가해진 외부자계와 기록될 정보에 따라서 변화되는 극성으로 된 장치에 있어서 상기 장치는 상기 교류에서 옵셋트를 발생하는 옵셋트수단을 포함하고 상기 옵셋트는 상기 장치의 다른 자계 발생수단에 의하여 발생되고 상기 정보기록 매체에 가해진 누설자계를 제거하도록 된 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
- 제4항에 있어서, 상기 자계 발생수단은 자기 헤드(3)의 자기 코일인 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
- 제4항에 있어서, 상기 다른 자계발생 수단은 레이저빔을 상기 정보기록 매체위에 집중시키는 액츄에이터로 되어 있는 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.
- 제4항에 있어서, 상기 다른 자계발생 수단은 상기 정보기록 매체위에 레이저빔을 추적하는 액츄에이터로 되어 있는 것을 특징으로 하는 자기광 정보기록 재생장치용 외부자계장치.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63-180711 | 1988-07-20 | ||
JP63180711A JPH065562B2 (ja) | 1988-07-20 | 1988-07-20 | 光磁気記録再生装置の外部磁界装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR900002266A true KR900002266A (ko) | 1990-02-28 |
KR930003132B1 KR930003132B1 (ko) | 1993-04-22 |
Family
ID=16087978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019890010308A KR930003132B1 (ko) | 1988-07-20 | 1989-07-20 | 자기광 정보기록 재생장치의 외부자계장치 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0352099B1 (ko) |
JP (1) | JPH065562B2 (ko) |
KR (1) | KR930003132B1 (ko) |
CA (1) | CA1325676C (ko) |
DE (1) | DE68909137T2 (ko) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07118106B2 (ja) * | 1990-03-08 | 1995-12-18 | パイオニア株式会社 | 光磁気記録再生装置 |
JP2636957B2 (ja) * | 1990-08-10 | 1997-08-06 | シャープ株式会社 | 磁気記録再生装置 |
JP3098896B2 (ja) * | 1992-06-23 | 2000-10-16 | キヤノン株式会社 | 光磁気記録装置 |
US5666333A (en) * | 1995-04-07 | 1997-09-09 | Discovision Associates | Biasing level controller for magneto-optical recording device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59139120A (ja) * | 1983-01-25 | 1984-08-09 | Seiko Epson Corp | 磁気記録装置 |
US4841407A (en) * | 1986-06-16 | 1989-06-20 | Canon Kabushiki Kaisha | Magnetic field generator having a plurality of coils for generating magnetic field in substantially the same space and method of driving the same |
-
1988
- 1988-07-20 JP JP63180711A patent/JPH065562B2/ja not_active Expired - Lifetime
-
1989
- 1989-07-19 EP EP89307336A patent/EP0352099B1/en not_active Expired - Lifetime
- 1989-07-19 CA CA000606074A patent/CA1325676C/en not_active Expired - Fee Related
- 1989-07-19 DE DE89307336T patent/DE68909137T2/de not_active Expired - Lifetime
- 1989-07-20 KR KR1019890010308A patent/KR930003132B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE68909137D1 (de) | 1993-10-21 |
EP0352099A2 (en) | 1990-01-24 |
DE68909137T2 (de) | 1994-02-03 |
EP0352099A3 (en) | 1991-10-09 |
JPH065562B2 (ja) | 1994-01-19 |
JPH0231301A (ja) | 1990-02-01 |
KR930003132B1 (ko) | 1993-04-22 |
CA1325676C (en) | 1993-12-28 |
EP0352099B1 (en) | 1993-09-15 |
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