KR970017239A - Operation algorithm of optical pickup - Google Patents

Operation algorithm of optical pickup Download PDF

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Publication number
KR970017239A
KR970017239A KR1019950030985A KR19950030985A KR970017239A KR 970017239 A KR970017239 A KR 970017239A KR 1019950030985 A KR1019950030985 A KR 1019950030985A KR 19950030985 A KR19950030985 A KR 19950030985A KR 970017239 A KR970017239 A KR 970017239A
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KR
South Korea
Prior art keywords
signal
magnitude
primary
track
servo
Prior art date
Application number
KR1019950030985A
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Korean (ko)
Other versions
KR100200856B1 (en
Inventor
성평용
김태경
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 KR1019950030985A priority Critical patent/KR100200856B1/en
Publication of KR970017239A publication Critical patent/KR970017239A/en
Application granted granted Critical
Publication of KR100200856B1 publication Critical patent/KR100200856B1/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
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
    • 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
    • G11B7/0945—Methods for initialising servos, start-up sequences

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

광픽업의 구동 알고리즘이 개시되어 있다. 이 개시된 구동 알고리즘은 포커스 오차신호와 트랙오차신호를 검출하는 단계와; 이 검출된 신호를 대물렌즈를 구동하는 액츄에이터로 피드백시켜 광디스크에 맺히는 스폿크기를 조절하는 포커스 서보 온(on)단계와; 제1차 RF신호의 크기를 산출하고 이를 저장하는 단계와; 광디스크에 맺히는 스폿의 위치를 조절하는 트랙 서보 온(on)단계와; 제2차 RF신호의 크기를 산출하고 이를 저장하는 단계와; 산출 및 저장된 제1차 RF신호와 제2차 RF신호의 크기를 비교하는 단계와; 제1차 RF 신호의 크기가 제2차 RF신호의 크기 보다 큰 경우 트랙오차신호의 위상을 반전하여 트랙 서보 온(on)단계 이전으로 피드백시키는 단계와; 제1차 RF신호의 크기가 제2차 RF신호의 크기 이하인 경우 RF신호 기록 또는 재생을 수행하는 단계로 이루어져 단파장용 광픽업으로 통상의 컴팩트에 기록된 신호를 재생할 수 있는 등 피크 깊이에 무관하게 정보를 기록 재생할 수 있는 매우 유용한 발명이다.An optical pickup driving algorithm is disclosed. The disclosed driving algorithm includes detecting a focus error signal and a track error signal; A focus servo on step of feeding back the detected signal to an actuator for driving the objective lens to adjust a spot size formed on the optical disk; Calculating a magnitude of the primary RF signal and storing the magnitude; A track servo on step of adjusting a position of a spot formed on the optical disk; Calculating a magnitude of the second RF signal and storing the magnitude; Comparing the magnitudes of the calculated and stored primary and secondary RF signals; Inverting the phase of the track error signal and feeding back the track servo on before the magnitude of the primary RF signal is greater than that of the secondary RF signal; When the magnitude of the primary RF signal is less than or equal to the magnitude of the secondary RF signal, the step of recording or reproducing the RF signal is performed, so that a short wavelength optical pickup can reproduce a signal recorded in a conventional compact, regardless of the peak depth. It is a very useful invention that can record and reproduce information.

Description

광픽업의 구동 알고리즘Operation algorithm of optical pickup

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

제5도는 본 발명에 따른 광픽업의 구동 알고리즘을 나타낸 순서도.5 is a flowchart illustrating a driving algorithm of an optical pickup according to the present invention.

Claims (1)

포커스 오차신호와 트랙오차 신호를 검출하는 단계와; 이 검출된 신호를 대물렌즈를 구동하는 액츄에이터로 피드백시켜 광디스크에 맺히는 스폿 크기를 조절하는 포커스 서보 온(on)단계와; 제1차 RF신호의 크기를 산출하고 이를 저장하는 단계와; 광 디스크에 맺히는 스폿의 위치를 조절하는 포커스 서보 온(on) 단계와; 제1차 RF 신호의 크기를 스폿의 위치를 조절하는 트랙 서보 온(on)단계와; 제2차 RF 신호의 크기를 산출하고 이를 저장하는 단계와; 산출 및 저장된 상기 제1차 RF신호와 제2차 RF신호의 크기를 비교하는 단계와; 상기 제1차 RF신호의 크기가 상기 제2차 RF신호의 크기 보다 큰 경우 상기 트랙오차신호의 위상을 반전하여 상기 트랙 서보 온(on)단계 이전으로 피드백 시키는 단계와; 상기 제1차 RF신호의 크기가 상기 제2차 RF신호의 크기 이하인 경우 RF신호 기록 또는 재생을 수행하는 단계로; 이루어진 것을 특징으로 하는 광픽업의 구동 알고리즘.Detecting a focus error signal and a track error signal; A focus servo on step of feeding back the detected signal to an actuator for driving the objective lens to adjust a spot size formed on the optical disk; Calculating a magnitude of the primary RF signal and storing the magnitude; A focus servo on step of adjusting a position of a spot formed on the optical disk; A track servo on step of adjusting the position of the spot by the magnitude of the primary RF signal; Calculating a magnitude of the second RF signal and storing the magnitude; Comparing the calculated and stored magnitudes of the primary and secondary RF signals; Inverting the phase of the track error signal and feeding back the track servo on before the size of the first RF signal is greater than the size of the second RF signal; Performing RF signal recording or reproducing when the magnitude of the primary RF signal is less than or equal to the magnitude of the secondary RF signal; Driving algorithm of the optical pickup, characterized in that made. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950030985A 1995-09-21 1995-09-21 Driving algorithm of optical pickup KR100200856B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950030985A KR100200856B1 (en) 1995-09-21 1995-09-21 Driving algorithm of optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950030985A KR100200856B1 (en) 1995-09-21 1995-09-21 Driving algorithm of optical pickup

Publications (2)

Publication Number Publication Date
KR970017239A true KR970017239A (en) 1997-04-30
KR100200856B1 KR100200856B1 (en) 1999-06-15

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ID=19427415

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950030985A KR100200856B1 (en) 1995-09-21 1995-09-21 Driving algorithm of optical pickup

Country Status (1)

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KR (1) KR100200856B1 (en)

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Publication number Publication date
KR100200856B1 (en) 1999-06-15

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