TW200638344A - Methods of calibrating servo signal bias for optical disc - Google Patents

Methods of calibrating servo signal bias for optical disc

Info

Publication number
TW200638344A
TW200638344A TW095111895A TW95111895A TW200638344A TW 200638344 A TW200638344 A TW 200638344A TW 095111895 A TW095111895 A TW 095111895A TW 95111895 A TW95111895 A TW 95111895A TW 200638344 A TW200638344 A TW 200638344A
Authority
TW
Taiwan
Prior art keywords
optical disc
servo signal
signal bias
methods
bias
Prior art date
Application number
TW095111895A
Other languages
English (en)
Inventor
Hsin-Chung Yeh
Jia-Hau Lin
Shang-Wei Wu
Jin-Chuan Hsu
Original Assignee
Mediatek Inc
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 Mediatek Inc filed Critical Mediatek Inc
Publication of TW200638344A publication Critical patent/TW200638344A/zh

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
    • G11B7/0945—Methods for initialising servos, start-up sequences
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1267—Power calibration
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
TW095111895A 2005-04-18 2006-04-04 Methods of calibrating servo signal bias for optical disc TW200638344A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/907,838 US20060233075A1 (en) 2005-04-18 2005-04-18 Methods of calibrating servo signal bias for optical disc

Publications (1)

Publication Number Publication Date
TW200638344A true TW200638344A (en) 2006-11-01

Family

ID=37108342

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095111895A TW200638344A (en) 2005-04-18 2006-04-04 Methods of calibrating servo signal bias for optical disc

Country Status (3)

Country Link
US (1) US20060233075A1 (zh)
CN (1) CN1855249A (zh)
TW (1) TW200638344A (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI256042B (en) * 2003-12-11 2006-06-01 Benq Corp Method for determining a threshold write-in power of a compact disc and related compact disc drive
KR20070032449A (ko) * 2005-09-16 2007-03-22 삼성전자주식회사 광기록재생장치 및 그 재생 파라미터 조정방법
US7804752B2 (en) * 2007-02-05 2010-09-28 Hewlett-Packard Development Company, L.P. Focal offset recording system and method
JPWO2008096629A1 (ja) * 2007-02-06 2010-05-20 日本電気株式会社 光照射パワー調整方法及び光学的情報記録再生装置
KR100867124B1 (ko) * 2007-02-15 2008-11-06 삼성전자주식회사 광디스크의 데이터 기록 및 재생 장치 및 방법
US7778120B2 (en) * 2007-05-08 2010-08-17 Mediatek Inc. Calibration method for determining servo parameters for accessing an optical disc
US7920447B2 (en) * 2007-06-13 2011-04-05 Mediatek Inc. Method and system for calibrating an optimized power

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11273097A (ja) * 1998-03-17 1999-10-08 Sony Corp フォーカスサーボ回路および光ディスク記録再生装置
JP2000011388A (ja) * 1998-06-19 2000-01-14 Sony Corp 光情報記録再生装置および光情報記録再生方法
JP2001034945A (ja) * 1999-07-22 2001-02-09 Sony Corp ディスクドライブ装置、及び未記録領域検出方法
KR100455717B1 (ko) * 1999-08-09 2004-11-06 가부시키가이샤 히타치세이사쿠쇼 시험삼아 써보기방법 및 이것을 이용한 광디스크장치
US6654331B1 (en) * 2000-04-03 2003-11-25 Hewlett-Packard Development Company, L.P. Method for accurate positioning of data marks and spaces on an optical disc
US6631108B1 (en) * 2000-04-03 2003-10-07 Hewlett-Packard Development Company, L.P. Method for accurate positioning of data marks and spaces on an optical disc
JP2002074664A (ja) * 2000-08-31 2002-03-15 Sony Corp 記録装置および方法、再生装置および方法、並びに記録媒体
JP3702817B2 (ja) * 2000-09-13 2005-10-05 ティアック株式会社 光ディスクドライブ装置
US6839310B2 (en) * 2001-02-14 2005-01-04 Matsushita Electric Industrial Co., Ltd. Optical disk drive having optical power control
JP3632622B2 (ja) * 2001-06-15 2005-03-23 ティアック株式会社 光ディスク装置
JP3863497B2 (ja) * 2002-12-04 2006-12-27 株式会社リコー 光学的情報記録装置及び光学的情報処理装置
KR100525877B1 (ko) * 2003-01-28 2005-11-02 주식회사 히타치엘지 데이터 스토리지 코리아 광디스크 장치에서의 포커스 바이어스 조정방법

Also Published As

Publication number Publication date
US20060233075A1 (en) 2006-10-19
CN1855249A (zh) 2006-11-01

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