KR940006095A - 광 디스크 장치 - Google Patents

광 디스크 장치 Download PDF

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Publication number
KR940006095A
KR940006095A KR1019930014657A KR930014657A KR940006095A KR 940006095 A KR940006095 A KR 940006095A KR 1019930014657 A KR1019930014657 A KR 1019930014657A KR 930014657 A KR930014657 A KR 930014657A KR 940006095 A KR940006095 A KR 940006095A
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KR
South Korea
Prior art keywords
optical disk
error signal
focus error
focus
magneto
Prior art date
Application number
KR1019930014657A
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English (en)
Other versions
KR100275061B1 (en
Inventor
노부유끼 오까
도시오 사또
마사유끼 미즈끼
Original Assignee
오오가 노리오
소니 가부시끼가이샤
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Publication date
Application filed by 오오가 노리오, 소니 가부시끼가이샤 filed Critical 오오가 노리오
Publication of KR940006095A publication Critical patent/KR940006095A/ko
Application granted granted Critical
Publication of KR100275061B1 publication Critical patent/KR100275061B1/ko

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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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/094—Methods and circuits for servo offset compensation
    • 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
    • G11B11/10597—Adaptations for transducing various formats on the same or different carriers
    • 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
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0945—Methods for initialising servos, start-up sequences

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 예를들자면 광자기 디스크를 사용해서 희망하는 정보를 기록 재생하고 다시 콤팩트 디스크를 재생할 수 있도록된 광 디스크 장치에 관해 기록 매체마다 가장 적합한 포커스 위치에 조정할 수가 있도록 한다.
본 발명은 선택회로(46)의 접점을 절환하여 광 디스크 및 광 자기 디스크 바이어스 전압 VB을 절환 포커스 에러신호의 신호 레벨을 보정한다.

Description

광 디스크 장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 일실시예를 따르는 광 디스크 장치를 도시하는 블록도.
제2(A)도 내지 (E)도는 광 디스크 장치의 동작 설명을 도시하는 신호 파형도.
제3도는 광 디스크 장치의 제2실시예를 도시하는 블록도.

Claims (3)

  1. 광 디스크 또는 광 자기 디스크를 교환가능하게 유지하고, 광 픽업에서 사출한 광 빔을 상기 광 디스크 또는 상기 광 자기 디스크에 집광하고, 상기 광 디스크 또는 상기 광자기 디스크의 기록정보를 재생하는 광 디스크 장치에 있어서, 상기 광 디스크 또는 상기 광 자기 디스크에서 얻어지는 상기 광 빔의 반사광을 수광하고, 포커스 에러 신호를 생성하는 포커서 에러 신호 생성수단과, 상기 포커스 에러 신호에 바이어스 전압을 중첩하고 상기 포커스 에러 신호의 신호 레벨을 보정하는 포커스 에러 신호 보정수단과, 상기 포커스 에러 신호 보정 수단으로 보정한 상기 포커스 에러 신호에 의거해서 상기 광 빔의 포커스 위치를 조정하는 포커스 구동수단을 구비하고, 상기 포커스 에러 신호 보정수단은 상기 광 디스크 및 상기 광 자기 디스크로 상기 바이어스 전압을 절환하는 것을 특징으로 하는 광 디스크 장치.
  2. 광 픽 업에서 사출한 광 빔을 디스크에 집광하고, 상기 광 디스크에 희망하는 정보를 기록하는 상기 광 디스크 장치에 있어서, 상기 광 디스크에서 얻어지는 상기 광 빔의 반사광을 수광하고 포커스에 에러 신호를 생성하는 포커스 에러 신호 생성수단과, 상기 포커스 에러신호에 바이어스 전압을 중첩하고, 상기 포커스 에러 신호의 신호레벨을 보정하는 포커스 에러 신호 보정수단과, 상기 포커스 에러 신호 보정수단으로 보정한 상기 포커스 에러 신호에 의거해서 상가 광 빔의 포커스 위치를 조정하는 포커스 구동수단을 구비하고, 상기 광 디스크는 내주측 및 외주측에 영역을 분할하고, 상기 내주측의 영역은 피트가 형성되어 소정의 기록정보가 기록되고, 상기 외주측의 영역은 자기기록 영역이 형성되고, 희망하는 정보를 열자기 기록하고, 상기 포커스 에러 신호 보정수단은 상기 내주측 및 외주측의 영역에서 상기 바이어스 전압을 절환하는 것을 특징으로 하는 광 디스크 장치.
  3. 제1항 또는 제2항에 있어서, 상기 포커스 에러 신호 보정 수단은 소정의 시정수 회로를 거쳐서 상기 바이어스 전압을 상기 포커스 에러 신호에 중첩하는 것을 특징으로 하는 광 디스크 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930014657A 1992-08-04 1993-07-30 Optical disk apparatus KR100275061B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP22800692 1992-08-04
JP92-228006 1992-08-04

Publications (2)

Publication Number Publication Date
KR940006095A true KR940006095A (ko) 1994-03-23
KR100275061B1 KR100275061B1 (en) 2000-12-15

Family

ID=16869705

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930014657A KR100275061B1 (en) 1992-08-04 1993-07-30 Optical disk apparatus

Country Status (4)

Country Link
US (1) US5463602A (ko)
EP (2) EP0586084B1 (ko)
KR (1) KR100275061B1 (ko)
DE (2) DE69320997T2 (ko)

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Also Published As

Publication number Publication date
DE69317831T2 (de) 1998-08-06
DE69317831D1 (de) 1998-05-14
EP0586084A3 (ko) 1994-08-03
KR100275061B1 (en) 2000-12-15
EP0586084A2 (en) 1994-03-09
DE69320997D1 (de) 1998-10-15
EP0782133B1 (en) 1998-09-09
DE69320997T2 (de) 1999-03-11
EP0782133A1 (en) 1997-07-02
US5463602A (en) 1995-10-31
EP0586084B1 (en) 1998-04-08

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