KR970002923A - Focus Pull-In Method in Optical Systems - Google Patents

Focus Pull-In Method in Optical Systems Download PDF

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Publication number
KR970002923A
KR970002923A KR1019950014631A KR19950014631A KR970002923A KR 970002923 A KR970002923 A KR 970002923A KR 1019950014631 A KR1019950014631 A KR 1019950014631A KR 19950014631 A KR19950014631 A KR 19950014631A KR 970002923 A KR970002923 A KR 970002923A
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KR
South Korea
Prior art keywords
focus
mode
disk
focus pull
optical system
Prior art date
Application number
KR1019950014631A
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Korean (ko)
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KR100200344B1 (en
Inventor
이윤희
Original Assignee
김광호
삼성전자 주식회사
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.)
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Publication date
Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950014631A priority Critical patent/KR100200344B1/en
Publication of KR970002923A publication Critical patent/KR970002923A/en
Application granted granted Critical
Publication of KR100200344B1 publication Critical patent/KR100200344B1/en

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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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in only

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

이 발명은 광학 시스템에서의 포커스 풀-인 방법(Focus Pull-In Method)에 관한 것으로서, 광학 시스템의 파워를 온하는 단계와, 슬레드를 디스크 최내주 위치까지 킥(Kick)하는 단계와, 마이컴이 FEpk 값을 읽는 단계와, 마이컴이 디스크의 존재 유무(有無)를 판단하는 단계와, 상기 단계에서 디스크가 없으면 시스템을 정지하는 단계와, 상기 단계에서 디스크가 있으면 포커스 풀-인 모드를 진행하는 단계와, 포커스 드라이브 속도를 빠르게 하여 일정 지점까지 가는 단계와, 포커스 드라이브 속도를 포커스 풀-인이 언제나 안정되게 동작할 수 있도록 하는 광학 시스템에서의 포커스 풀-인 방법에 관한 것이다.The present invention relates to a focus pull-in method in an optical system, comprising: turning on the optical system, kicking the sled to the innermost position of the disc, Reading the FEpk value, determining whether the disk is present, stopping the system if there is no disk in the step, and proceeding to the focus pull-in mode if the disk is present in the step. And a step of increasing the focus drive speed to a certain point, and a focus pull-in method in an optical system that enables the focus pull-in to operate stably at all times.

Description

광학 시스템에서의 포커스 풀-인 방법Focus Pull-In Method in Optical Systems

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 이 발명의 실시예에 따른, 광학 시스템에서의 포커스 풀-인 방법에서 사용되는 신호들의 파형도이다. 제3도는 이 발명의 실시예에 따른, 광학 시스템에서의 포커스 풀-인 방법을 나타낸 흐름도이다.2 is a waveform diagram of signals used in a focus pull-in method in an optical system, according to an embodiment of the invention. 3 is a flow diagram illustrating a focus pull-in method in an optical system, according to an embodiment of the invention.

Claims (4)

광학 시스템의 파워를 온하는 단계와, 슬레드를 디스크의 최내주 위치까지 킥(Kick)하는 단계와, 마이컴이 FEpk 값을 읽는 단계와, 마이컴이 디스크의 존재 유무(有無)를 판단하는 단계와, 상기 단계에서 디스크가 없으면 시스템을 정지하는 단계와, 상기 단계에서 디스크가 있으면 포커스 풀-인 모드를 진행하는 단게와, 포커스 드라이브 속도를 빠르게 하여 일정 지점까지 가는 단계와, 포커스 드라이브 속도를 일정 비율로 줄이는 단계와, 서보 온 모드로 진행하는 단계로 이루어지는 것을 특징으로 하는 광학 시스템에서의 포커스 풀-인 방법.Powering on the optical system, kicking the sled to the innermost position of the disk, reading the FEpk value by the microcomputer, determining the presence of the disk by the microcomputer, Stopping the system if there is no disk in the above step, moving the focus pull-in mode if there is a disk in this step, increasing the focus drive speed to a certain point, and increasing the focus drive speed to a certain ratio. And a step in which the servo-on mode is performed. 제1항에 있어서, 상기한 서보 온 모드로 진행하는 단계 이후에, 포커스 드롭이 발생하였는지 판단하는 단계와, 상기 단계에서 포커스 드롭이 발생하지 않았으면, 계속 서보 온 모드를 진행하는 단계와, 상기 단계에서 포커스 드롭이 발생하였으면, 포커스 풀-인 모드에서 서보 온모드로 바뀐 포커스 드라이브의 위치로 이동하는 단계와, 상기 단계에서 위치를 이동한 후에 다시 포커스 풀-인 모드를 진행하는 단계를 더 포함하는 것을 특징으로 하는 광학 시스템에서의 포커스 풀-인 방법.The method of claim 1, further comprising: determining whether a focus drop has occurred after the step of proceeding to the servo on mode; and if the focus drop has not occurred at the step, continuing the servo on mode; If the focus drop occurs in the step, the method further includes the step of moving from the focus pull-in mode to the position of the focus drive changed to the servo on mode; Focus pull-in method in an optical system, characterized in that. 제1항에 있어서, 상기한 포커스 드라이브 속도를 빠르게 하여 일정 지점까지 가는 단계에서의 일정 지점이 FEpk/2 지점인 것을 특징으로 하는 광학 시스템에서의 포커스 풀-인 방법.The method of claim 1, wherein a predetermined point in the step of increasing the focus drive speed to a predetermined point is an FEpk / 2 point. 제1항에 있어서, 상기한 포커스 드라이브 속도를 일정 비율로 줄이는 단계에서의 일정 비율이 1/2인 것을 특징으로 하는 광학 시스템에서의 포커스 풀-인 방법.2. The method of claim 1, wherein the ratio in reducing said focus drive speed to a constant ratio is one half. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950014631A 1995-06-02 1995-06-02 Focus pull-in method in optical system KR100200344B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950014631A KR100200344B1 (en) 1995-06-02 1995-06-02 Focus pull-in method in optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950014631A KR100200344B1 (en) 1995-06-02 1995-06-02 Focus pull-in method in optical system

Publications (2)

Publication Number Publication Date
KR970002923A true KR970002923A (en) 1997-01-28
KR100200344B1 KR100200344B1 (en) 1999-06-15

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KR1019950014631A KR100200344B1 (en) 1995-06-02 1995-06-02 Focus pull-in method in optical system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100320737B1 (en) * 1998-07-07 2002-01-19 윤종용 Adaptive sector seeking method for reducing disk drive power consumption

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100320737B1 (en) * 1998-07-07 2002-01-19 윤종용 Adaptive sector seeking method for reducing disk drive power consumption

Also Published As

Publication number Publication date
KR100200344B1 (en) 1999-06-15

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