KR20040025256A - Method for discriminating tilt between optical pickup and optical disc - Google Patents

Method for discriminating tilt between optical pickup and optical disc Download PDF

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Publication number
KR20040025256A
KR20040025256A KR1020020057132A KR20020057132A KR20040025256A KR 20040025256 A KR20040025256 A KR 20040025256A KR 1020020057132 A KR1020020057132 A KR 1020020057132A KR 20020057132 A KR20020057132 A KR 20020057132A KR 20040025256 A KR20040025256 A KR 20040025256A
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KR
South Korea
Prior art keywords
optical disk
optical pickup
optical
tilt
recording surface
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KR1020020057132A
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Korean (ko)
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권영만
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주식회사 대우일렉트로닉스
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Priority to KR1020020057132A priority Critical patent/KR20040025256A/en
Publication of KR20040025256A publication Critical patent/KR20040025256A/en

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    • 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
    • G11B7/095—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 discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0956—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 discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10305—Improvement or modification of read or write signals signal quality assessment
    • G11B20/10388—Improvement or modification of read or write signals signal quality assessment control of the read or write heads, e.g. tracking errors, defocus or tilt compensation
    • 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
    • G11B7/0908—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 focusing only
    • 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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0935—Details of the moving parts
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: A method for determining a tilt between an optical pickup and an optical disk is provided to improve the reproduction performance of the optical disk by rapidly correcting the tilt between the optical pickup and the optical disk. CONSTITUTION: A method for determining a tilt between an optical pickup and an optical disk includes: a first step of calculating the time difference between two S-curves corresponding to the focus error generated from each of the surface of the optical disk and the recording surface of the optical disk during the search for the focus of the data recording surface in the inner and outer peripherals; and a second step of determining whether a tilt is generated between the optical pickup(10) and the optical disk or not in response to the difference of height by calculating the difference between the inner peripheral and the outer peripheral. The height difference is calculated by using a specific driving speed of the actuator to move the objective lens up and down and the time difference between the inner peripheral and the outer peripheral of the optical disk.

Description

광 픽업과 광 디스크 사이의 틸트 판별 방법{METHOD FOR DISCRIMINATING TILT BETWEEN OPTICAL PICKUP AND OPTICAL DISC}Tilt determination method between optical pickup and optical disc {METHOD FOR DISCRIMINATING TILT BETWEEN OPTICAL PICKUP AND OPTICAL DISC}

본 발명은 광 픽업(optical pickup)과 광 디스크(optical disc) 사이의 틸트(tilt) 판별 방법에 관한 것으로, 특히, 광 디스크를 재생함에 있어서 광 픽업과 광 디스크 사이의 틸트를 판별하는 방법에 관한 것이다.The present invention relates to a method for determining the tilt between an optical pickup and an optical disc, and more particularly, to a method for determining the tilt between an optical pickup and an optical disc in reproducing an optical disc. will be.

일반적으로 광 픽업은 대물 렌즈를 사용하여 광 디스크의 데이터 기록면에 광을 조사해서 반사되는 광을 추출하여 이 추출된 광으로부터 광 디스크의 데이터를 재생한다.In general, an optical pickup uses an objective lens to extract light reflected by irradiating light onto a data recording surface of the optical disc and reproduce data on the optical disc from the extracted light.

이와 같은 종래의 기술에 있어서는 광 픽업과 광 디스크 사이에 틸트가 발생할 경우 광 픽업은 광 디스크의 데이터 기록면에 광을 적절하게 조사할 수 없기 때문에, 광 디스크의 데이터를 재생할 수가 없다.In such a conventional technique, when a tilt occurs between the optical pickup and the optical disk, the optical pickup cannot adequately irradiate light onto the data recording surface of the optical disk, and thus data on the optical disk cannot be reproduced.

본 발명은 상술한 결점을 해결하기 위하여 안출한 것으로, 광 디스크를 재생함에 있어서 광 픽업 신호로부터 포커스 에러(focus error) 여부를 검출함에 따라 광 픽업과 광 디스크 사이의 틸트를 판별하는 광 픽업과 광 디스크 사이의 틸트 판별 방법을 제공하는 데 그 목적이 있다.Disclosure of Invention The present invention has been made to solve the above-described drawbacks, and the optical pickup and the optical disc determine the tilt between the optical pickup and the optical disc by detecting a focus error from the optical pickup signal when the optical disc is reproduced. Its purpose is to provide a method for determining tilt between discs.

이와 같은 목적을 달성하기 위한 본 발명은, 이미 구비되어 있는 대물 렌즈를 통해 광 디스크의 데이터 기록면에 광을 조사함으로써 데이터를 픽업하는 광 픽업부를 구비한 광 픽업 시스템에서 상기 광 픽업과 상기 광 디스크 사이의 틸트 판별 방법에 있어서, 상기 광 디스크의 내주와 외주에서 데이터 기록면의 포커스를 위해 각각 서치 시 상기 광 디스크의 표면과 상기 광 디스크의 기록면에서 각각 발생되는 포커스 에러에 대응하는 두 S-커브 사이의 시간차를 계산하는 제 1 단계; 및 상기 대물 렌즈를 상하, 좌우, 및 경사 방향으로 이동시키는 액츄에이터(actuator)의 특정 구동 속도와 상기 광 디스크의 내주와 외주에서의 상기 각 시간차를 사용해서 상기 내주와 외주의 높이 차이를 계산하여 상기 높이 차이에 따라 상기 광 픽업과 상기 광 디스크 사이의 틸트 여부를 판별하는 제 2 단계를 포함하는 것을 특징으로 한다.The present invention for achieving the above object, between the optical pickup and the optical disk in the optical pickup system having an optical pickup unit for picking up data by irradiating light to the data recording surface of the optical disk through the objective lens already provided. A tilt discrimination method according to claim 1, wherein the search is performed between two S-curves corresponding to a focus error generated on the surface of the optical disk and the recording surface of the optical disk at the time of searching for the focus of the data recording surface on the inner and outer circumferences of the optical disk. Calculating a time difference; And calculating a difference in height between the inner and outer circumferences by using a specific driving speed of an actuator for moving the objective lens in the vertical, horizontal, and inclined directions and the respective time differences in the inner and outer circumferences of the optical disk. And determining whether the tilt is between the optical pickup and the optical disk according to a height difference.

도 1은 본 발명에 따른 광 픽업과 광 디스크 사이의 틸트 판별 방법을 실시하기 위한 광 픽업 시스템의 일 실시예를 나타낸 블록도,1 is a block diagram showing an embodiment of an optical pickup system for performing a tilt discrimination method between an optical pickup and an optical disk according to the present invention;

도 2는 도 1에 도시된 광 픽업 시스템에서 실시되는 광 픽업의 일 실시예를 나타낸 도면,FIG. 2 is a diagram showing an embodiment of an optical pickup implemented in the optical pickup system shown in FIG. 1;

도 3은 도 2에 도시된 포커스 에러를 나타낸 도면.3 is a diagram illustrating a focus error shown in FIG. 2; FIG.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 : 광 픽업부 12 : 포커스 에러 검출부10 optical pickup section 12 focus error detection section

14 : 제어부 20 : 광 디스크14 control unit 20 optical disc

22 : 포커스 에러 24 : 대물 렌즈22: focus error 24: objective lens

이하, 첨부된 도면을 참조하여 본 발명에 따른 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 광 픽업과 광 디스크 사이의 틸트 판별 방법을 실시하기 위한 광 픽업 시스템의 일 실시예를 나타낸 블록도로, 광 디스크의 데이터 기록면에 광을 대물 렌즈를 통해 조사함으로써 기록된 데이터에 대응하여 반사되는 광을 수광 다이오드를 통해 받아 전기적인 신호를 출력하는 광 픽업부(10), 광 픽업부(10)로부터 제공되는 전기적인 신호를 받아 포커스 에러 여부를 검출하는 포커스 에러 검출부(12), 및 포커스 에러 검출부(12)로부터 제공되는 포커스 에러 여부 신호를 받아 광 픽업부(10)의 픽업 동작을 제어하는 제어부(14)로 구성된다.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing an embodiment of an optical pickup system for performing a tilt discrimination method between an optical pickup and an optical disk according to the present invention, in which data recorded by irradiating light onto a data recording surface of an optical disk through an objective lens is shown. The optical pickup unit 10 receives the reflected light through the light-receiving diode and outputs an electrical signal, and the focus error detector 12 detects the focus error by receiving the electrical signal provided from the optical pickup unit 10. And a control unit 14 which receives a focus error signal provided from the focus error detection unit 12 and controls the pick-up operation of the optical pickup unit 10.

동 도면에 있어서, 광 픽업부(10)에 설치된 액츄에이터는 제어부(14)로부터 제공되는 액츄에이터 구동용 제어 신호에 따라 도 2와 같은 대물 렌즈(24)를 이동시켜 도 2와 같은 광 디스크(20)의 내주와 외주에서 데이터 기록면의 광 조사 포커스를 찾기 위해 각각 서치한다. 이 후, 광 조사에 대해 반사되는 광을 광 픽업부(10)에 설치된 수광 다이오드를 통해 전기적인 신호로 변환하여 포커스 에러 검출부(12)로 제공한다. 상기 광 디스크(20)의 광 조사는 대물 렌즈(24)를 통해 이루어진다. 상기 액츄에이터는 대물 렌즈(24)를 상하, 좌우, 및 경사 방향으로 이동시킬 수 있다. 상기 포커스 서치 시 액츄에이터를 도 2와 같이 사인파나 삼각파로 구동시킨다.In the figure, the actuator provided in the optical pickup unit 10 moves the objective lens 24 as shown in FIG. 2 in accordance with the actuator driving control signal provided from the control unit 14, and thus the optical disk 20 as shown in FIG. Search to find the light irradiation focus of the data recording surface in the inner and outer circumferences of the respective. Thereafter, the light reflected by the light irradiation is converted into an electrical signal through a light receiving diode provided in the optical pickup unit 10 and provided to the focus error detector 12. Light irradiation of the optical disk 20 is made through the objective lens 24. The actuator may move the objective lens 24 in the up, down, left, and right directions. In the focus search, the actuator is driven by a sine wave or a triangle wave as shown in FIG. 2.

포커스 에러 검출부(12)는 광 픽업부(10)로부터 제공되는 전기적인 신호를 받아 도 2와 같은 포커스 에러(22) 여부를 검출하여 제어부(14)로 제공한다. 상기 포커스 에러(22)는 도 3과 같이 S-커브 형태로 이루어진다.The focus error detection unit 12 receives an electrical signal provided from the optical pickup unit 10 and detects whether the focus error 22 shown in FIG. 2 is provided to the control unit 14. The focus error 22 has an S-curve shape as shown in FIG. 3.

제어부(14)는 포커스 에러 검출부(12)로부터 제공되는 신호를 받아 광 디스크(20)의 표면과 광 디스크(20)의 기록면에서 각각 발생되는 포커스 에러에 대응하는 두 S-커브 사이의 시간차를 계산한다. 제어부(14)는 액츄에이터의 정해진 특정 구동 속도와 광 디스크(20)의 내주와 외주에서의 각각의 S-커브 사이의 시간차를 사용해서 광 디스크(20)의 내주와 외주의 높이 차이를 계산한다. 제어부(14)는 상기 높이 차이에 따라 광 픽업과 광 디스크(20) 사이의 틸트 여부를 판별한다. 제어부(14)는 광 픽업과 광 디스크(20) 사이에 틸트가 발생할 경우 광 픽업부(10) 내의 대물 렌즈(24)의 경사를 액츄에이터를 통해 제어하여 기록면에 대한 포커스가 적절하게 이루어져 데이터가 정상적으로 재생되도록 한다. 광 디스크의 표면과 기록면 사이의 거리는 규정에 의해 정해져 있다.The control unit 14 receives a signal provided from the focus error detection unit 12 and calculates a time difference between two S-curves corresponding to the focus error generated on the surface of the optical disc 20 and the recording surface of the optical disc 20, respectively. do. The controller 14 calculates the height difference between the inner circumference and the outer circumference of the optical disc 20 by using a predetermined specific driving speed of the actuator and the time difference between each S-curve at the inner circumference and the outer circumference of the optical disc 20. The controller 14 determines whether the optical pickup and the optical disk 20 are tilted according to the height difference. The controller 14 controls the inclination of the objective lens 24 in the optical pickup unit 10 through the actuator when the tilt occurs between the optical pickup and the optical disk 20, so that the focus on the recording surface is appropriately performed so that the data is normally maintained. Let it play The distance between the surface of the optical disc and the recording surface is determined by regulation.

이상에서 설명한 바와 같이, 본 발명은 광 디스크를 재생함에 있어서 광 픽업 신호로부터 포커스 에러 여부를 검출함에 따라 광 픽업과 광 디스크 사이의 틸트를 판별한다. 따라서, 광 픽업과 광 디스크 사이의 틸트를 신속하게 보정함으로써 광 디스크의 재생 성능이 향상되는 효과가 있다.As described above, the present invention discriminates the tilt between the optical pickup and the optical disk by detecting the focus error from the optical pickup signal when the optical disk is reproduced. Therefore, there is an effect that the reproduction performance of the optical disc is improved by quickly correcting the tilt between the optical pickup and the optical disc.

Claims (3)

이미 구비되어 있는 대물 렌즈를 통해 광 디스크의 데이터 기록면에 광을 조사함으로써 데이터를 픽업하는 광 픽업부를 구비한 광 픽업 시스템에서 상기 광 픽업과 상기 광 디스크 사이의 틸트 판별 방법에 있어서,In the tilt pick-up method between the optical pickup and the optical disk in the optical pickup system having an optical pickup unit for picking up data by irradiating light to the data recording surface of the optical disk through the objective lens already provided, 상기 광 디스크의 내주와 외주에서 데이터 기록면의 포커스를 위해 각각 서치 시 상기 광 디스크의 표면과 상기 광 디스크의 기록면에서 각각 발생되는 포커스 에러에 대응하는 두 S-커브 사이의 시간차를 계산하는 제 1 단계; 및A first step of calculating a time difference between two S-curves corresponding to a focus error generated on the surface of the optical disk and the recording surface of the optical disk at the time of searching for the focus of the data recording surface on the inner and outer circumferences of the optical disk, respectively ; And 상기 대물 렌즈를 상하, 좌우, 및 경사 방향으로 이동시키는 액츄에이터의 특정 구동 속도와 상기 광 디스크의 내주와 외주에서의 상기 각 시간차를 사용해서 상기 내주와 외주의 높이 차이를 계산하여 상기 높이 차이에 따라 상기 광 픽업과 상기 광 디스크 사이의 틸트 여부를 판별하는 제 2 단계를 포함하는 광 픽업과 광 디스크 사이의 틸트 판별 방법.The difference in height between the inner and outer circumferences is calculated by using a specific driving speed of the actuator for moving the objective lens in the up, down, left, and inclined directions and the respective time differences in the inner and outer circumferences of the optical disk, and according to the height difference. And a second step of determining whether the optical pickup is tilted between the optical pickup and the optical disk. 제 1 항에 있어서, 상기 포커스 서치 시 상기 액츄에이터를 사인파로 구동시키는 것을 특징으로 하는 광 픽업과 광 디스크 사이의 틸트 판별 방법.The method of claim 1, wherein the actuator is driven by a sine wave during the focus search. 제 1 항에 있어서, 상기 포커스 서치 시 상기 액츄에이터를 삼각파로 구동시키는 것을 특징으로 하는 광 픽업과 광 디스크 사이의 틸트 판별 방법.The tilt discrimination method between the optical pickup and the optical disk according to claim 1, wherein the actuator is driven by a triangle wave during the focus search.
KR1020020057132A 2002-09-19 2002-09-19 Method for discriminating tilt between optical pickup and optical disc KR20040025256A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040042253A (en) * 2002-11-13 2004-05-20 삼성전자주식회사 Apparatus and method for detecting a tilt disc, and apparatus and method for reproducing data using the same
KR20040048610A (en) * 2002-12-04 2004-06-10 삼성전자주식회사 Method and apparatus for compensating disc tilt
KR20040049463A (en) * 2002-12-06 2004-06-12 삼성전자주식회사 Method and apparatus for compensating disc tilt

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1011774A (en) * 1996-06-19 1998-01-16 Victor Co Of Japan Ltd Optical disk reproducing device
KR0146121B1 (en) * 1995-09-22 1998-10-15 구자홍 Focusing control method of optical disk player
KR20000026832A (en) * 1998-10-23 2000-05-15 구자홍 Method for controlling tilt
KR20000074297A (en) * 1999-05-19 2000-12-15 구자홍 Method for recording/playing of optical record medium
JP2002074737A (en) * 2000-08-29 2002-03-15 Sanyo Electric Co Ltd Method and device for adjusting optical pickup device
KR20020027862A (en) * 2000-10-05 2002-04-15 구자홍 Method for controlling a focus offset in optical disc driver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0146121B1 (en) * 1995-09-22 1998-10-15 구자홍 Focusing control method of optical disk player
JPH1011774A (en) * 1996-06-19 1998-01-16 Victor Co Of Japan Ltd Optical disk reproducing device
KR20000026832A (en) * 1998-10-23 2000-05-15 구자홍 Method for controlling tilt
KR20000074297A (en) * 1999-05-19 2000-12-15 구자홍 Method for recording/playing of optical record medium
JP2002074737A (en) * 2000-08-29 2002-03-15 Sanyo Electric Co Ltd Method and device for adjusting optical pickup device
KR20020027862A (en) * 2000-10-05 2002-04-15 구자홍 Method for controlling a focus offset in optical disc driver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040042253A (en) * 2002-11-13 2004-05-20 삼성전자주식회사 Apparatus and method for detecting a tilt disc, and apparatus and method for reproducing data using the same
KR20040048610A (en) * 2002-12-04 2004-06-10 삼성전자주식회사 Method and apparatus for compensating disc tilt
KR20040049463A (en) * 2002-12-06 2004-06-12 삼성전자주식회사 Method and apparatus for compensating disc tilt

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