KR900006929A - Track access method of optical disk driver - Google Patents

Track access method of optical disk driver Download PDF

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Publication number
KR900006929A
KR900006929A KR1019880013233A KR880013233A KR900006929A KR 900006929 A KR900006929 A KR 900006929A KR 1019880013233 A KR1019880013233 A KR 1019880013233A KR 880013233 A KR880013233 A KR 880013233A KR 900006929 A KR900006929 A KR 900006929A
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KR
South Korea
Prior art keywords
track
cpu
value
signal
counter
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KR1019880013233A
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Korean (ko)
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KR950005956B1 (en
Inventor
조헌철
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안시환
삼성전자 주식회사
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Priority to KR1019880013233A priority Critical patent/KR950005956B1/en
Publication of KR900006929A publication Critical patent/KR900006929A/en
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers

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

Abstract

내용 없음No content

Description

광디스크 드라이버의 트랙 억세스방법Track access method of optical disk driver

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

제2도는 본 발명을 수행하기 위한 시스템 블럭도,2 is a system block diagram for carrying out the present invention;

제3도는 제2도중 트랙 카운팅부의 구체회로도,3 is a detailed circuit diagram of a track counting unit in FIG.

제4도는 본 발명에 따른 흐름도.4 is a flow chart according to the present invention.

Claims (1)

광학 디스크 드라이버 시스템을 제어처리하는 CPU(10)와, 광디스크(20)와, 상기 광디스크(20)에 기록된 신호를 검출하여 전기적 신호로 변환하는 광픽업부(72)와, 상기 CPU(10)의 제어를 받아 상기 광픽업부(72)를 제어하는 스텝모터 구동회로(73)와, 상기 광픽업부(72) 검출신호를 복조하기 위한 복조부(71)와, 상기 CPU(10)의 감소제어신호와 헤드구동방향 신호를 배타적 논리합하여 트랙카운팅의 모드신호를 발생하는 XOR게이트(30)와 상기 XOR게이트(30)의 출력에 따라 업 또는 다운카운팅 모드가 설정되며 상기 CPU(10) 목표트랙에 대한 설정 데이타를 로드하여 트랙킹 에러신호에 의해 트랙수를 카운팅 하는 트랙카운터(40)와, 상기 데이타 리드부(50)를 통한 현재의 트랙번호를 완충한후 상기 CPU(10)로 출력하는 트랙 번호버퍼(60)와, 상기 CPU(10)의 디지탈 데이타 신호를 아날로그화 하는 디지탈 아날로그 변환기(50)와, 상기 디지탈 아날로그 변환기(50) 출력신호를 증폭하여 화인 드라이브 신호를 출력하는 제 1 증폭기(80)와, 상기 화인 드라이브 신호와 광픽업부(72)로부터 발생되는 트랙킹 에러신호를 입력하여 CPU(10)으로부터 발생되는 서보모드 신호의 상태에 따라 트래킹 액츄에이터를 구동하거나 오토트래킹 루프를 형성토록 하는 멀티플랙서(90)를 구비한 광디스크 드라이버의 목표트랙 억세스방법에 있어서, 상기 CPU(10)에 의해 디스크 드라이버를 리세트하는 제 1 과정과, 상기 제 1 과정 수행후 디스크(20)가 다른 것으로 바뀌었는지 판단하여 디스크(20)가 바뀌었을시 포커싱 데스트를 실시하고 그에 따라 액츄에이터로 대물렌즈를 고정시킨 후 타이머를 리세트하여 트랙카운터 및 최대 최소트랙 레지스터를 세트하는 제 2 과정과, 상기 제 2 과정 수행후 디스크(20) 회전에 따른 트랙카운터 값을 입력하고 상기 트랙카운터(40) 값이 최대트랙 레지스터 값보다 클시 상기 트랙카운터 값을 최대트랙 레지스터에 저장하는 제 3 과정과, 상기 제 3 과정에서 트랙카운터 값이 최대트랙 레지스터 값보다 크지않을시 상기 트랙카운터 값이 최소트랙 레지스터 값보다 작은지 판단하여 작을시 상기 트랙카운터 값을 최소트랙 레지스터에 저장하는 제 4 과정과, 상기 제 3, 제 4 과정 수행후 및 상기 제 4 과정에서 트랙카운터 값이 최소트랙 레지스터 값보다 작지 않을시 디스크가 1회전 하였는지 검사하여 1회전하지 않았으시 상기 제 3 과정으로 루핑하는 제 5 과정과, 상기 제 5 과정에서 디스크가 1회전 하였을시 최대트랙 레지스터 값에서 최소트랙 레지스터 값을 감산하여 트랙 편심을 구하고 상기 트랙 편심값을 램에 기억시킨후 하기한 제 7 과정으로 루핑하는 제 6 과정과, 상기 제 1 과정에서 디스크가 다른 것으로 바뀌지 않았을시 시크명령이 입력되었나 판단하며 입력되지 않았을시 상기 제 2 과정으로 루핑하는 제 7 과정과, 상기 제 7 과정에서 시크명령이 입력되었을시 목표 트랙에 따라서 트랙카운터(40)에 트랙수를 세트하고 트랙카운터(40)가 다운카운트 하도록 상기 CPU(10)의 감소제어 신호를 결정하는 제 8 과정과, 상기 제 8 과정 수행 후 모터를 구동하여 트랙을 카운팅하고 트랙킹 액츄에이터가 억세스 가능한가 검사하며 억세스 불가능시 루핑하는 제 9 과정과, 상기 제 9 과정에서 억세스 가능시 트랙 카운터값이 트랙편심량보다 크면 상기 광픽업부(72)내의 트랙킹 액츄에이터를 구동하여 대물렌즈를 이동하여 고정시키고 그렇지 않을시 현위치에서 대물렌즈를 헤드의 중앙에 고정시키는 제 10과정과, 상기 제 10 과정 수행후 트랙카운터(40)를 리드하고 트랙카운터가 0인가 검사하여 0가 아닐시 루핑하는 제 11 과정과, 상기 11 과정에서 트랙카운터(40)가 0일시 오토트래킹 모드로 세트하고 상기 트랙번호버퍼(60)를 통하여 디스크(20)로부터 트랙번호를 읽어 목표트랙인가 검사하며 목표트랙 일시 제 2 과정으로 루핑하는 제 12 과정과, 상기 제 12 과정에서 목표트랙이 아닐시 어긋난 트랙수에 따라 트랙카운터(40)에 트랙수를 세트하고 트랙카운터(40)의 카운트 모드를 재조정하기 위한 감소제어 신호를 결정한후 대물렌즈의 위치를 조정하고 상기 제 11 과정으로 되돌아가는 제 13 과정으로 이루어짐을 특징으로 하는 목표트랙 억세스방법.CPU 10 for controlling the optical disc driver system, optical disc 20, optical pickup unit 72 for detecting and converting signals recorded on optical disc 20 into electrical signals, and CPU 10 A step motor driving circuit 73 for controlling the optical pickup unit 72 under the control of the control unit, a demodulation unit 71 for demodulating the detection signal of the optical pickup unit 72, and a reduction in the CPU 10. The up or down counting mode is set according to the output of the XOR gate 30 and the XOR gate 30 which generate a track counting mode signal by exclusively ORing the control signal and the head driving direction signal, and the target track of the CPU 10. A track counter 40 which loads the setting data for the number and counts the number of tracks according to the tracking error signal, and a track which buffers the current track number through the data read part 50 and outputs the buffer to the CPU 10. The number buffer 60 and the digital data signal of the CPU 10. A digital analog converter 50 for analogization, a first amplifier 80 for amplifying an output signal of the digital analog converter 50 to output a fine drive signal, and the fine drive signal and the optical pickup unit 72. A target track access method of an optical disc driver having a multiplexer 90 for driving a tracking actuator or forming an autotracking loop according to a state of a servo mode signal generated from the CPU 10 by inputting a generated tracking error signal. In the first and second processes of resetting the disk driver by the CPU 10 and determining whether the disk 20 is changed to another one after performing the first process, focusing is performed when the disk 20 is changed. After fixing the objective lens with the actuator, the timer is reset to set the track counter and the maximum minimum track register. And a second step of inputting a track counter value according to the rotation of the disk 20 after the second process and storing the track counter value in the maximum track register when the track counter 40 value is greater than the maximum track register value. And a fourth process of storing the track counter value in the minimum track register when the track counter value is smaller than the minimum track register value when the track counter value is not greater than the maximum track register value in the third process. And a fifth loop which loops to the third process when the disk is not rotated by checking whether the disk is rotated once when the track counter value is not smaller than the minimum track register value in the fourth process and after performing the third and fourth processes. And track eccentricity by subtracting the minimum track register value from the maximum track register value when the disc is rotated once in the fifth step. And a sixth step of storing the track eccentric value in RAM and looping to the seventh step described below, and determining whether a seek command is input when the disc is not changed to another one in the first step. A seventh process of looping to the process, and when the seek command is input in the seventh process, the number of tracks is set in the track counter 40 according to the target track and the track counter 40 is down counted. An eighth process of determining a reduction control signal, a ninth process of driving a motor to count the tracks, checking whether the tracking actuator is accessible, and looping when inaccessible, after performing the eighth process, and accessing at the ninth process If the track counter value is larger than the track eccentricity, the tracking actuator in the optical pickup unit 72 is driven to move and fix the objective lens. A tenth process of fixing the objective lens to the center of the head at the current position; and an eleventh process of reading the track counter 40 and looping when the track counter is zero after performing the tenth process. In step 11, the track counter 40 is set to the auto tracking mode at 0, and reads the track number from the disk 20 through the track number buffer 60 to check whether the target track is a loop. After setting the twelfth step and the number of tracks according to the number of tracks shifted when the target track is not the target track in the twelfth step, determine the reduction control signal to readjust the count mode of the track counter 40. And a thirteenth process of adjusting the position of the objective lens and returning to the eleventh process. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880013233A 1988-10-11 1988-10-11 Track access method for optical diskdriver KR950005956B1 (en)

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Application Number Priority Date Filing Date Title
KR1019880013233A KR950005956B1 (en) 1988-10-11 1988-10-11 Track access method for optical diskdriver

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Application Number Priority Date Filing Date Title
KR1019880013233A KR950005956B1 (en) 1988-10-11 1988-10-11 Track access method for optical diskdriver

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KR900006929A true KR900006929A (en) 1990-05-09
KR950005956B1 KR950005956B1 (en) 1995-06-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030090234A (en) * 2002-05-21 2003-11-28 삼성전기주식회사 Control method of stepping motor for pick-up driving using controller for DC motor and device for the same
KR100431697B1 (en) * 1996-11-21 2004-12-23 디지털 비디오 시스템스 인코퍼레이션 Data access method in CD playback system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100431697B1 (en) * 1996-11-21 2004-12-23 디지털 비디오 시스템스 인코퍼레이션 Data access method in CD playback system
KR20030090234A (en) * 2002-05-21 2003-11-28 삼성전기주식회사 Control method of stepping motor for pick-up driving using controller for DC motor and device for the same

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Publication number Publication date
KR950005956B1 (en) 1995-06-07

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