KR930010893A - 외부 자계 발생 장치 - Google Patents

외부 자계 발생 장치 Download PDF

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KR930010893A
KR930010893A KR1019920021569A KR920021569A KR930010893A KR 930010893 A KR930010893 A KR 930010893A KR 1019920021569 A KR1019920021569 A KR 1019920021569A KR 920021569 A KR920021569 A KR 920021569A KR 930010893 A KR930010893 A KR 930010893A
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South Korea
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magnetic field
field generating
generating means
output
current output
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KR950007300B1 (ko
Inventor
미쯔오 이시이
도모유끼 미야께
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쯔지 하루오
샤프 가부시끼가이샤
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • 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
    • 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
    • G11B11/10506—Recording by modulating only the light beam of 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
    • 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
    • G11B11/10595—Control of operating function

Abstract

내용 없음

Description

외부 자계 발생 장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도 내지 제4도는 본 발명의 한 실시예를 도시하는 것으로, 제1도는 본 발명의 자기 헤드의 구성을 도시하는 개략 설명도.
제2도는 본 발명의 광자기 기록 재생 장치의 구성을 도시하는 개략 설명도.
제3도는 본 발명의 드라이버의 구성을 도시하는 블럭도.
제4(a)도 및 제4(b)도는 본 발명의 다른 자기 헤드의 구성을 도시하는 설명도.
* 도면의 주요부분에 대한 부호의 설명
1 : 광자기 디스크 2 : 모터
3 : 광 픽업 4 : 자기 헤드
5 : 드라이버 6 : 외부 자계 발생 장치

Claims (9)

  1. 자계 변조 방식 및 변조 방식에 의해 광자기 기록 매체에 정보를 기록하는 기록 재생 장치에 탑재되는 것으로, 상기 광자기 기록 매체에 있어서의 광 비임이 조사되는 위치에 자계를 인가하는 외부 자계 발생 장치에 있어서, 고속 반전하는 교류 자계를 발생하는 제1자계 발생수단과, 상기 제1자계 발생 수단과, 상기 제1자계 발생수단 및 제2자계 발생 수단의 한쪽을 전환 신호에 따라 선택하고, 선택한 제1자계 발생 수단 또는 제2자계 발생 수단에 전력을 공급하는 전력 공급 수단을 구비하는 것을 특징으로 하는 외부 자계 발생 장치.
  2. 제1항에 있어서, 상기 제1자계 발생 수단 및 제2자계 발생 수단은 고 투자율을 갖는 자심에 각각 제1 및 제2도선을 감아서 형성된 것으로, 상기 제1자계 발생 수단의 제1도선과 상기 제2자계 발생수단의 제2도선은 길이와 직경의 차를 이용해서 저항값이 동일하게 설정되어 있는 것을 특징으로 하는 외부 자계 발생 장치.
  3. 제2항에 있어서, 상기 제1자계 발생 수단 및 제2자계 발생 수단은 상기 자심의 양단부에 각각 제1 및 제2도선을 감아서 형성되는 것을 특징으로 하는 외부 자계 발생 장치.
  4. 제1항에 있어서, 상기 제1자계 발생 수단 및 제2자계 발생 수단은 고 투자육을 갖는 자심의 일단부에 제1도선을 감아서 제1자계 발생 수단을 형성하고, 또 그 주위에 제2도선을 감아서 제2자계 발생 수단을 형성한 것을 특징으로 하는 외부 자계 발생 장치.
  5. 제2항에 있어서, 상기 자심은 Mn-Zn 페라이트로 형성되어 있는 것을 특징으로 하는 외부 자계 발생 장치.
  6. 제2항에 있어서, 상기 전력 공급 수단은 전원에 접속되어 소정 전류를 출력하는 제1 및 제2전류 출력 수단과, 기록 신호에 따라 한쪽의 전류 출력 수단을 출력 상태로 함과 동시에 다른쪽의 전류 출력 수단의 출력측을 접지 상태로 하는 전류 출력 전환 수단과, 전환 신호에 따라 제1자계 발생 수단 및 제2자계 발생 수단의 한쪽을 선택하고, 선택한 제1 또는 제2자계 발생 수단의 상기 제1 및 제2도선의 양단의 상기 양 전류 출력 수단의 출력측에 접속시키는 자석 전환 수단을 갖는 것을 특징으로 하는 외부 자계 발생 장치.
  7. 제6항에 있어서, 상기 전류 출력 수단은 전류원과 저항기와 코일이 직렬 접속된 것을 특징으로 하는 외부 자계 발생 장치.
  8. 제7항에 있어서, 상기 전원 출력 전환 수단은 상기 제1 및 제2전류 출력 수단에 각각 접속된 제1 및 제2다이오드와, 기록 신호에 따라 개폐하고, 폐쇄시 상기 제1 및 제2다이오드를 통해 상기 각 제1 및 제2전류 출력 수단을 접지시키는 제1 및 제2스위치와, 상기 제1 및 제2스위치에 교대롤 반전한 기록 신호를 입력시키는 NOT회로를 갖는 것을 특징으로 하는 외부 자계 발생 장치.
  9. 제8항에 있어서, 상기 자석 전환 수단은, 전환 신호에 따라 전환 가능한 제3 및 제4스위치를 가지고, 상기 제3 및 제4스위치의 공통 단자는 상기 전류 출력 수단과 전류 출력 전환 수단과의 사이에 접속되어 있고, 상기 제3 및 제4스위치의 제1출력 단자가 제1자계 발생 수단에 접속되고, 상기 제3 및 제4스위치의 제2출력 단자가 제2자계 발생 수단에 접속되어 있는 것을 특징으로 하는 외부 자계 발생 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019920021569A 1991-11-18 1992-11-17 외부 자계 발생 장치 Expired - Fee Related KR950007300B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3301838A JP3065404B2 (ja) 1991-11-18 1991-11-18 外部磁界発生装置
JP91-301838 1991-11-18

Publications (2)

Publication Number Publication Date
KR930010893A true KR930010893A (ko) 1993-06-23
KR950007300B1 KR950007300B1 (ko) 1995-07-07

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KR1019920021569A Expired - Fee Related KR950007300B1 (ko) 1991-11-18 1992-11-17 외부 자계 발생 장치

Country Status (6)

Country Link
US (1) US5313444A (ko)
EP (1) EP0545579B1 (ko)
JP (1) JP3065404B2 (ko)
KR (1) KR950007300B1 (ko)
CA (1) CA2081864C (ko)
DE (1) DE69218346T2 (ko)

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JPH0729234A (ja) * 1993-07-07 1995-01-31 Sony Corp 光磁気記録再生装置
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JP4900525B1 (ja) * 2011-03-09 2012-03-21 パナソニック株式会社 非接触充電モジュール及びこれを備えた送信側非接触充電機器と受信側非接触充電機器
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WO2013065245A1 (ja) 2011-11-02 2013-05-10 パナソニック株式会社 非接触無線通信用コイル、伝送コイル及び携帯無線端末
JP2013169122A (ja) 2012-02-17 2013-08-29 Panasonic Corp 非接触充電モジュール及びそれを備えた携帯端末
JP6112383B2 (ja) 2012-06-28 2017-04-12 パナソニックＩｐマネジメント株式会社 携帯端末
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Also Published As

Publication number Publication date
CA2081864A1 (en) 1993-05-19
KR950007300B1 (ko) 1995-07-07
CA2081864C (en) 1996-11-12
DE69218346T2 (de) 1997-10-23
US5313444A (en) 1994-05-17
DE69218346D1 (de) 1997-04-24
JP3065404B2 (ja) 2000-07-17
EP0545579B1 (en) 1997-03-19
EP0545579A1 (en) 1993-06-09
JPH05144108A (ja) 1993-06-11

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