TW200516572A - Disc drive apparatus - Google Patents

Disc drive apparatus

Info

Publication number
TW200516572A
TW200516572A TW093129437A TW93129437A TW200516572A TW 200516572 A TW200516572 A TW 200516572A TW 093129437 A TW093129437 A TW 093129437A TW 93129437 A TW93129437 A TW 93129437A TW 200516572 A TW200516572 A TW 200516572A
Authority
TW
Taiwan
Prior art keywords
read signal
signal
drive apparatus
read
disc drive
Prior art date
Application number
TW093129437A
Other languages
Chinese (zh)
Inventor
Marcel Francois Heertjes
Franciscus Lambertus Maria Cremers
Frank Bernhard Sperling
George Alois Leonie Leenknegt
Horst Rumpf
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200516572A publication Critical patent/TW200516572A/en

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
    • 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
    • G11B7/0948—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 specially adapted for detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts
    • 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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • 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
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
    • 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
    • G11B7/0946—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 specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

A method is described for controlling an optical disc drive apparatus (1) of a type comprising: scanning means (30) for scanning a record track of an optical disc (2) and for generating a read signal (SR); actuator means (50) for controlling the positioning of at least one read/write element (34) of said scanning means (30) with respect to the disc (2); a control circuit (90) for receiving said read signal (SR) and generating at least one actuator control signal (SCR) on the basis of at least one signal component of said read signal (SR), the control circuit (90) having at least one variable control parameter. The method comprises the steps of: deriving from said read signal (SR) at least two signals (REn; MIRn) of mutually different type; and varying the setting of said at least one variable control parameter as a function of said at least two signals.
TW093129437A 2003-10-02 2004-09-29 Disc drive apparatus TW200516572A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03103662 2003-10-02

Publications (1)

Publication Number Publication Date
TW200516572A true TW200516572A (en) 2005-05-16

Family

ID=34400546

Family Applications (1)

Application Number Title Priority Date Filing Date
TW093129437A TW200516572A (en) 2003-10-02 2004-09-29 Disc drive apparatus

Country Status (6)

Country Link
EP (1) EP1671320A2 (en)
JP (1) JP2007507822A (en)
KR (1) KR20060088890A (en)
CN (1) CN1860533A (en)
TW (1) TW200516572A (en)
WO (1) WO2005034103A2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19640870A1 (en) * 1996-10-04 1998-04-09 Thomson Brandt Gmbh Recording or reproducing device for optical information carriers with a servo control circuit and method for error signal handling in such
DE19931835A1 (en) * 1999-07-09 2001-01-11 Thomson Brandt Gmbh Optical recording carrier read-write device with digital controller, has reference input of analog-to-digital converter (ADC) used for connection to output of summation unit
WO2002091369A1 (en) * 2001-05-03 2002-11-14 Koninklijke Philips Electronics N.V. Optical scanning device
JP3566701B2 (en) * 2002-01-31 2004-09-15 株式会社東芝 Optical disk recording and playback device

Also Published As

Publication number Publication date
JP2007507822A (en) 2007-03-29
EP1671320A2 (en) 2006-06-21
KR20060088890A (en) 2006-08-07
WO2005034103A2 (en) 2005-04-14
WO2005034103A3 (en) 2005-08-25
CN1860533A (en) 2006-11-08

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