KR950015257A - Method and apparatus for controlling focusing search of disk system - Google Patents

Method and apparatus for controlling focusing search of disk system Download PDF

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Publication number
KR950015257A
KR950015257A KR1019930024854A KR930024854A KR950015257A KR 950015257 A KR950015257 A KR 950015257A KR 1019930024854 A KR1019930024854 A KR 1019930024854A KR 930024854 A KR930024854 A KR 930024854A KR 950015257 A KR950015257 A KR 950015257A
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KR
South Korea
Prior art keywords
focusing
disc
disk
controlling
standard
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KR1019930024854A
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Korean (ko)
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KR0150979B1 (en
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박종호
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김광호
삼성전자 주식회사
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Priority to KR1019930024854A priority Critical patent/KR0150979B1/en
Publication of KR950015257A publication Critical patent/KR950015257A/en
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Publication of KR0150979B1 publication Critical patent/KR0150979B1/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

Abstract

본 발명은 디스크 시스템의 포커싱 서치 제어방법 및 장치에 관한 것으로, 본 발명의 포커싱 서치 제어방법은 포커싱 서치 전에 먼저 디스크를 회전시킨 다음에 포커싱 서치를 시작하도록 제어하는 과정을 포함함을 특징으로 하며 본 발명의 포커싱 서치 제어장치는 디스크의 회전속도를 측정하는 수단과, 측정된 디스크의 회전속도가 규격선속도범위 이내인지를 판단하는 수단을 포함함을 특징으로 한다.The present invention relates to a method and apparatus for controlling a focusing search of a disk system. The focusing search control method of the present invention includes a process of controlling a disk to be rotated first and then starting a focusing search before the focusing search. The focusing search control apparatus of the present invention is characterized in that it comprises means for measuring the rotational speed of the disk, and means for determining whether the measured rotational speed of the disk is within the standard linear speed range.

본 발명에 의하여 스핀들 킥에 의하여 발생되는 디스크의 흔들림에 의한 포커싱 에러를 최소화하고, 빠른 포커싱 OK가 될 수 있도록 스핀들 제어와 포커싱 제어를 할 수 있다.According to the present invention, the spindle control and the focusing control can be performed to minimize the focusing error due to the shaking of the disk generated by the spindle kick and to make the fast focusing OK.

Description

디스크 시스템의 포커싱 서치 제어방법 및 장치Method and apparatus for controlling focusing search of disk system

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

제2도는 본 발명에 의한 포커싱 서치 제어방법의 흐름도.2 is a flowchart of a focusing search control method according to the present invention;

제3도는 포커싱 서치 제어 파형도.3 is a focusing search control waveform diagram.

제4도는 본 발명에 의한 포커싱 서치 제어장치의 블럭도.4 is a block diagram of a focusing search control apparatus according to the present invention.

Claims (8)

디스크 시스템에서 초기 포커싱 및 재생 중의 충격에 의한 포커싱 에러 발생 시에 디스크의 신호면과 픽업의 대물렌즈의 거리를 일정하게 유지하기 위한 포커싱 서치를 제어하는 방법에 있어서 디스크를 회전시키는 과정과 포커싱 서치를 시작하도록 제어하는 과정으로 이루어진 것을 특징으로 하는 디스크 시스템의 포커싱 서치 제어방법.A method of controlling a focusing search for maintaining a constant distance between a signal surface of a disk and an objective lens of a pickup when a focusing error occurs due to an impact during initial focusing and playback in a disk system. A method of controlling the focusing search of a disk system, characterized in that the control process to start. 제1항에 있어서 상기 제어과정이 디스크의 회전속도가 규격선속도 범위 이내일 때 포커싱 서치를 시작하도록 제어하는 단계를 더 구비하는 것을 특징으로 하는 디스크 시스템의 포커싱 서치 제어방법.The method of claim 1, wherein the control process further comprises controlling to start the focusing search when the rotational speed of the disk is within the standard speed range. 디스크를 먼저 회전시키고 포커싱 서치를 시작하는 디스크 시스템에 있어서 디스크의 회전속도를 측정하는 수단과, 측정된 디스크의 회전속도가 규격선속도 범위 이내인지를 판단하는 수단을 포함함을 특징으로 하는 디스크 시스템의 포커싱 서치 제어방법.Disc system comprising a means for measuring the rotational speed of the disc, and means for determining whether the rotational speed of the measured disc is within the standard line speed range in the disc system to rotate the disc first and start the focusing search Method of controlling focusing search. 제3항에 있어서 상기 측정수단이 디스크 1회전마다 일정한 수의 펄스를 발생하는 장치를 구비하는 것을 특징으로 하는 디스크 시스템의 포커싱 서치 제어방법.4. A method according to claim 3, wherein said measuring means comprises a device for generating a predetermined number of pulses per one revolution of the disc. 제4항에 있어서 상기 펄스 발생장치는 디스크가 직접 회전하는 위치에 균일한 간격으로 적어도 2개의 얇은 스릿으로 이루어진 검출기와 발광하여 상기 스릿의 유무에 따라 디스크의 회전에 의하여 변하는 빛의 반사량을 감지하는 감지기와 감지된 빛의 반사량에 따라 디지탈 신호로 변환하여 펄스를 발생하는 인코더를 구비하는 것을 특징으로 하는 디스크 시스템의 포커싱 서치 제어방법.The pulse generating apparatus of claim 4, wherein the pulse generator emits light with a detector including at least two thin slits at uniform intervals at a position where the disc directly rotates, thereby detecting an amount of reflection of light that is changed by the rotation of the disc depending on the presence or absence of the slit. And an encoder for converting the digital signal into a pulse according to the detector and the amount of reflected light. 제5항에 있어서 상기 검출기를 디스크를 회전시키는 스핀들 모터의 측에 구비하는 것을 특징으로 하는 디스크 시스템의 포커싱 서치 제어방법.6. The method of controlling a focusing search of a disk system according to claim 5, wherein the detector is provided on a side of a spindle motor for rotating the disk. 제3항에 있어서 상기 판단수단이 포커싱 서치되는 위치의 디스크 트랙에 대하여 규격선속도에 따라 정해지는 규격 1회전시간을 계산하는 연산부와, 상기 규격 1회시간동안에 상기 펄스발생장치에 의하여 발생한 펄스 수를 카운팅하는 펄스카운터와, 상기 카운팅된 펄스수와 상기 펄스발생장치의 스릿수에 의하여 포커싱 서치되는 위치에서의 선속도를 계산하여 디스크의 선속도가 규격선속도의 범위 이내인가를 판단하는 포커싱 제어부를 구비하는 것을 특징으로 하는 디스크 시스템의 포커싱 서치 제어방법.4. The calculating unit according to claim 3, wherein said determination means calculates a standard one rotation time determined according to a standard line speed with respect to a disc track at a position where focusing is searched, and the number of pulses generated by said pulse generator during said one time standard. A focusing control unit for determining whether the linear velocity of the disc is within the range of the standard linear velocity by calculating the linear velocity at the position where the focus is searched by the pulse counter for counting the number of pulses and the number of pulses and the number of slit numbers of the pulse generator. Focusing search control method of the disk system comprising a. 제7항에 있어서 상기 연산부가 디스크의 모든 트랙에 대하여 규격선속도에 따라 정해지는 규격1회전시간의 데이타를 저장하는 메모리부를 구비하는 것을 특징으로 하는 디스크 시스템의 포커싱 서치 제어방법.8. The method of controlling a focusing search of a disk system according to claim 7, wherein said computing section includes a memory section for storing data of standard one rotation time determined according to a standard line speed for all tracks of the disk. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930024854A 1993-11-20 1993-11-20 Control method and the device of focusing search for disk system KR0150979B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930024854A KR0150979B1 (en) 1993-11-20 1993-11-20 Control method and the device of focusing search for disk system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930024854A KR0150979B1 (en) 1993-11-20 1993-11-20 Control method and the device of focusing search for disk system

Publications (2)

Publication Number Publication Date
KR950015257A true KR950015257A (en) 1995-06-16
KR0150979B1 KR0150979B1 (en) 1998-10-15

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