WO1998049679A3 - Apparatus and detection unit for scanning an optically readable record carrier - Google Patents

Apparatus and detection unit for scanning an optically readable record carrier Download PDF

Info

Publication number
WO1998049679A3
WO1998049679A3 PCT/IB1998/000481 IB9800481W WO9849679A3 WO 1998049679 A3 WO1998049679 A3 WO 1998049679A3 IB 9800481 W IB9800481 W IB 9800481W WO 9849679 A3 WO9849679 A3 WO 9849679A3
Authority
WO
WIPO (PCT)
Prior art keywords
signals
detection unit
record carrier
optically readable
comparing
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IB1998/000481
Other languages
French (fr)
Other versions
WO1998049679A2 (en
Inventor
Johannus Lepoldus Bakx
Anthonius Leonardus Joh Dekker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Philips AB
Philips Svenska AB
Original Assignee
Koninklijke Philips Electronics NV
Philips AB
Philips Svenska AB
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 Koninklijke Philips Electronics NV, Philips AB, Philips Svenska AB filed Critical Koninklijke Philips Electronics NV
Priority to JP10529383A priority Critical patent/JP2000512791A/en
Priority to EP98908253A priority patent/EP0914652B1/en
Priority to DE69830774T priority patent/DE69830774T2/en
Publication of WO1998049679A2 publication Critical patent/WO1998049679A2/en
Publication of WO1998049679A3 publication Critical patent/WO1998049679A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G11B7/0901—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 for track following only

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

A description is given of an apparatus and a detection unit for sanning an optically readable record carrier (1), in which a light beam modulated by the information marks in a track on the record carrier is incident on the detection unit (15) comprising four detectors. A reliable tracking error signal based on time differences between detector signals is obtained for high-density recording by comparing digitized signals of the detectors with a delayed signal Td generated by delay unit (45) based on the digitized signals. The time differences between the detector signals result in length differences between pulses in the comparing signals A and B, which pulses have a nominal length of Td. The comparing signals A and B are low-pass filtered and combined to generate the tracking error signal TE.
PCT/IB1998/000481 1997-04-25 1998-04-02 Apparatus and detection unit for scanning an optically readable record carrier Ceased WO1998049679A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10529383A JP2000512791A (en) 1997-04-25 1998-04-02 Scanning device and detecting device for scanning an optically readable record carrier
EP98908253A EP0914652B1 (en) 1997-04-25 1998-04-02 Apparatus and detection unit for scanning an optically readable record carrier
DE69830774T DE69830774T2 (en) 1997-04-25 1998-04-02 DEVICE AND DETECTOR UNIT FOR REPRODUCING AN OPTICALLY READABLE RECORDING CARRIER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP97201244 1997-04-25
EP97201244.7 1997-04-25

Publications (2)

Publication Number Publication Date
WO1998049679A2 WO1998049679A2 (en) 1998-11-05
WO1998049679A3 true WO1998049679A3 (en) 1999-02-04

Family

ID=8228260

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1998/000481 Ceased WO1998049679A2 (en) 1997-04-25 1998-04-02 Apparatus and detection unit for scanning an optically readable record carrier

Country Status (8)

Country Link
US (1) US6137755A (en)
EP (1) EP0914652B1 (en)
JP (1) JP2000512791A (en)
CN (1) CN1127724C (en)
DE (1) DE69830774T2 (en)
MY (1) MY120534A (en)
TW (1) TW399202B (en)
WO (1) WO1998049679A2 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792103B1 (en) * 1999-03-16 2001-11-09 St Microelectronics Sa METHOD AND DEVICE FOR CONTROLLING AN OPTICAL BEAM INCIDENT ON A TRACK OF A MOBILE INFORMATION MEDIUM, IN PARTICULAR A DIGITAL DISK
JP2002298350A (en) * 2001-03-28 2002-10-11 Tdk Corp Method, device, and medium for optical recording
JP3897671B2 (en) * 2002-09-30 2007-03-28 三菱電機株式会社 Status system signal processing circuit
CN1689081A (en) * 2002-10-04 2005-10-26 皇家飞利浦电子股份有限公司 High track density super resolution MO-ROM medium
TWI271726B (en) * 2003-02-14 2007-01-21 Ind Tech Res Inst Circuit for tracking error signal detection on an optical storage medium
TWI248610B (en) * 2003-04-07 2006-02-01 Mediatek Inc Method and related apparatus for deriving a tracking error signal
US7616536B2 (en) 2003-05-21 2009-11-10 Koninklijke Philips Electronics N.V. Apparatus for radial tracking in an optical disc drive using tracking an error signal derived from wobble-induced signal components and/or data-induced signal components of a detector output
TWI295464B (en) * 2003-08-22 2008-04-01 Mediatek Inc Control circuit for an optical pickup head in a disk drive
CN100365709C (en) * 2003-09-09 2008-01-30 联发科技股份有限公司 Control circuit for optical read-write head in CD driver
TWI258740B (en) * 2004-07-08 2006-07-21 Realtek Semiconductor Corp Apparatus and method for generating a tracking error signal in an optical disc drive
US7583569B2 (en) * 2004-07-08 2009-09-01 Realtek Semiconductor Corp. Apparatus and related method for generating a tracking error signal in an optical disc drive
US7633842B2 (en) * 2004-07-08 2009-12-15 Realtek Semiconductor Corp. Apparatus for generating tracking error signal in optical disc drive
US7512043B2 (en) * 2004-07-08 2009-03-31 Realtek Semiconductor Corp. Apparatus and method for generating a tracking error signal in an optical disc drive
JP4327693B2 (en) * 2004-09-30 2009-09-09 株式会社東芝 Optical disc apparatus and optical detection signal processing method
US20070047687A1 (en) * 2005-08-25 2007-03-01 Tse-Hsiang Hsu Phase detector and related phase detecting method thereof
CN101072033B (en) * 2006-05-11 2010-05-12 联咏科技股份有限公司 Digital-to-analog converter and method
TWI345771B (en) * 2007-06-14 2011-07-21 Sunplus Technology Co Ltd Circuit for generating tracking error signal
EP2354840A1 (en) * 2010-02-05 2011-08-10 Siemens Aktiengesellschaft An apparatus and a method for performing a difference measurement of an object image
JP2013073659A (en) * 2011-09-29 2013-04-22 Sanyo Electric Co Ltd Optical pickup device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4812726A (en) * 1986-01-16 1989-03-14 Mitsubishi Denki Kabushiki Kaisha Servo circuit positioning actuator
EP0343952A2 (en) * 1988-05-26 1989-11-29 Matsushita Electric Industrial Co., Ltd. Focus error detection system for an optical recording/reproducing system
EP0458319A2 (en) * 1990-05-22 1991-11-27 Matsushita Electric Industrial Co., Ltd. Servo system for optical recording reproducing drive
EP0574886A2 (en) * 1992-06-15 1993-12-22 Sony Corporation Optical recording medium and playback method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057833A (en) * 1974-10-03 1977-11-08 U.S. Philips Corporation Centering detection system for an apparatus for playing optically readable record carriers
NL8303564A (en) * 1983-10-17 1985-05-17 Philips Nv DEVICE FOR DISPLAYING INFORMATION FROM AN OPTICALLY READABLE RECORD CARRIER.
JPS6446237A (en) * 1987-08-12 1989-02-20 Canon Kk Optical information recording and reproducing device
US5157645A (en) * 1989-04-06 1992-10-20 Kabushiki Kaisha Toshiba Optical disk unit
JPH0423234A (en) * 1990-05-18 1992-01-27 Sony Corp Tracking error signal generation device for optical device
JP3426669B2 (en) * 1993-11-22 2003-07-14 三洋電機株式会社 Error signal generation circuit
JPH08263855A (en) * 1995-03-23 1996-10-11 Nec Corp Optical head transfer controller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4812726A (en) * 1986-01-16 1989-03-14 Mitsubishi Denki Kabushiki Kaisha Servo circuit positioning actuator
EP0343952A2 (en) * 1988-05-26 1989-11-29 Matsushita Electric Industrial Co., Ltd. Focus error detection system for an optical recording/reproducing system
EP0458319A2 (en) * 1990-05-22 1991-11-27 Matsushita Electric Industrial Co., Ltd. Servo system for optical recording reproducing drive
EP0574886A2 (en) * 1992-06-15 1993-12-22 Sony Corporation Optical recording medium and playback method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN; & JP,A,60 256 945 (MATSUSHITA DENKI SANGYO KK) 18 December 1985. *

Also Published As

Publication number Publication date
MY120534A (en) 2005-11-30
EP0914652B1 (en) 2005-07-06
EP0914652A2 (en) 1999-05-12
DE69830774T2 (en) 2006-05-18
WO1998049679A2 (en) 1998-11-05
TW399202B (en) 2000-07-21
US6137755A (en) 2000-10-24
CN1229504A (en) 1999-09-22
JP2000512791A (en) 2000-09-26
CN1127724C (en) 2003-11-12
DE69830774D1 (en) 2005-08-11

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