KR970050419A - Recording power control device and method of optical disk device - Google Patents

Recording power control device and method of optical disk device Download PDF

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Publication number
KR970050419A
KR970050419A KR1019950050147A KR19950050147A KR970050419A KR 970050419 A KR970050419 A KR 970050419A KR 1019950050147 A KR1019950050147 A KR 1019950050147A KR 19950050147 A KR19950050147 A KR 19950050147A KR 970050419 A KR970050419 A KR 970050419A
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KR
South Korea
Prior art keywords
attenuation constant
reflected light
recording power
optical disc
value
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KR1019950050147A
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Korean (ko)
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KR100189501B1 (en
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이웅용
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구자홍
Lg 전자주식회사
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Priority to KR1019950050147A priority Critical patent/KR100189501B1/en
Publication of KR970050419A publication Critical patent/KR970050419A/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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1263—Power control during transducing, e.g. by monitoring
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 기록 가능한 광디스크의 기록 전력을 제어함에 있어, 입사광에 대한 반사광의 감쇄 상수값을 계산하여 이 감쇄 상수값을 기준값과 비교한 결과에 따라 광디스크 기록 전력을 제어함으로써, 최적 전력 제어를 간소한 회로 구성에 의해 달성할 수 있도록 한 광디스크 장치의 기록 전력 제어장치와 그 제어 방법에 관한 것이다.In the present invention, in controlling the recording power of a recordable optical disc, the optimum power control is simplified by calculating the attenuation constant value of the reflected light with respect to the incident light and controlling the optical disc recording power according to the result of comparing this attenuation constant value with the reference value. The present invention relates to a recording power control device for an optical disk device and a method of controlling the same, which can be achieved by a circuit configuration.

종래의 기록 가능한 광디스크 장치의 최적 기록 전력 제어장치에서는 광디스크에 입사되는 광펄스의 타이밍 정보와, 이 정보에 대응하여 검출하는 반사광의 세기를 기준값과 비교하여 전력 제어를 하고 있기 때문에, 기록 과정에서 실제로 측정된 반사광 레벨의 값을 비교하기 위한 아날로그/디지탈 변환기가 필요하고, 또한 샘플링 시점을 인지하기 위한 시간 정보가 필요하기 때문에 시스템 구성이 복잡해지는 문제점이 있다.In the conventional recording power control apparatus of the recordable optical disc apparatus, power control is performed by comparing the timing information of the optical pulse incident on the optical disc and the intensity of the reflected light detected corresponding to this information with a reference value. There is a problem in that the system configuration is complicated because an analog / digital converter is required for comparing the values of the measured reflected light levels, and time information for recognizing the sampling point is required.

본 발명은 기록 가능한 광디스크의 기록 전력 제어를 수행함에 있어, 광출력수단(22)과 감쇄상수 연산수단(24, 25, 26, 27, 28), 기준 상수값 기억수단(29), 기준 상수값을 산출된 감쇄 상수값과 비교하여 기록 전력을 제어하는 제어수단(30, 23)으로 광디스크 기록 전력의 제어를 수행함으로써, 시간의 함수인 반사광 레벨의 값을 사용하지 않고, 입사광의 세기에 따른 반사광의 감쇄상수(α)를 산출하여 사용하기 때문에, 반사광 레벨의 값을 샘플링하기 위한 시간 정보가 필요하지 않게하며, 또한 아날로그/디지탈 변환기도 필요하지 않게하여, 회로 구성을 간소화할 수 있도록 한 광디스크 장치의 기록 전력 제어장치와 그 제어방법을 제공 한다.According to the present invention, in performing recording power control of a recordable optical disc, the optical output means 22, the attenuation constant calculating means 24, 25, 26, 27, 28, the reference constant value storing means 29, and the reference constant value By controlling the optical disk recording power with the control means 30, 23 for controlling the recording power by comparing the calculated attenuation constant value with the attenuation constant value, the reflected light according to the intensity of the incident light without using the value of the reflected light level as a function of time Since the attenuation constant α of? Is calculated and used, time information for sampling the value of the reflected light level is not required, and an analog / digital converter is also unnecessary, so that an optical disc device can be simplified. The present invention provides a recording power control apparatus and a control method thereof.

Description

광디스크 장치의 기록 전력 제어장치와 방법Recording power control device and method of optical disk device

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

제4도는 본 발명의 기록 가능한 광디스크 장치의 기록 전력 제어장치의 블록도4 is a block diagram of a recording power control apparatus of the recordable optical disc apparatus of the present invention.

Claims (4)

광디스크에 신호 기록을 위한 광을 출력하는 광출력 수단과; 상기 광출력 수단에서 출력된 광이 광디스크에 반사되며, 그 반사광의 세기를 검출하여 입사광의 세기에 따른 반사광의 감쇄상수(a)를 계산하는 감쇄상수 연산수단과; 상기의 광출력 수단이 최적의 기록 전력을 출력하도록 하기 위하여 최적 기록 전력에 대응하는 감쇄상수를 기준값으로 기억하고 있는 기억수단과; 상기의 감쇄상수 연산수단에서 계산된 감쇄상수와 상기 기억수단에 기억된 기준 감쇄상수값을 서로 비교하여 그 비교 결과로 상기 광출력수단의 기록 전력 출력값을 제어하는 수단; 으로 구성함을 특징으로 하는 광디스크 장치의 기록 전력 제어장치.Optical output means for outputting light for recording signals to the optical disc; Attenuation constant calculating means for reflecting the light output from the light output means to the optical disc, and detecting the intensity of the reflected light to calculate the attenuation constant (a) of the reflected light according to the intensity of the incident light; Storage means for storing the attenuation constant corresponding to the optimum recording power as a reference value so that the optical output means outputs the optimum recording power; Means for comparing the attenuation constant calculated in the attenuation constant calculating means with the reference attenuation constant value stored in the storage means and controlling the write power output value of the optical output means as a result of the comparison; And a recording power control apparatus for an optical disk device. 제1항에 있어서, 상기의 감쇄상수 연산수단은, 반사광의 세기신호를 시간의 함수로 미분처리하는 제1미분수단과, 상기 제1미분수단에서 미분 처리된 신호를 로그(log)함수 처리하는 함수처리수단과, 상기 함수처리수단에서 출력된 신호를 미분하여 감쇄상수(a)값을 출력하는 제2미분수단으로 구성함을 특징으로 하는 광디스크 장치의 기록 전력 제어장치.The attenuation constant calculating means according to claim 1, wherein the attenuation constant calculating means comprises: a first differential means for differentially processing the intensity signal of the reflected light as a function of time, and a log function for processing the differential signal processed by the first differential means; And a second differential means for differentiating a signal output from the function processing means and outputting attenuation constant (a) value. 광디스크에 기록 신호로서 광을 입사시키고 또 그 반사되는 광을 검출하는 제1단계와; 상기의 제1단계에서 검출된 반사광의 세기로부터 입사광의 세기에 따른 반사광의 감쇄상수(a)를 계산하는 제2단계와; 상기의 제2단계에서 계산된 감쇄상수(a)를 최적 전력 공급을 위해 미리 기억시켜 놓은 기준 감쇄상수값과 비교하여, 그 비교 결과로 상기 제1단계에서 광디스크에 입사되는 광신호 전력을 제어하는 제3단계; 로 제어함을 특징으로 하는 광디스크 장치의 기록 전력 제어방법.A first step of injecting light into the optical disk as a recording signal and detecting the reflected light; A second step of calculating attenuation constant (a) of the reflected light according to the intensity of the incident light from the intensity of the reflected light detected in the first step; The attenuation constant a calculated in the second step is compared with a reference attenuation constant value stored in advance for optimal power supply, and the comparison result controls the optical signal power incident on the optical disc in the first step. The third step; And controlling the recording power of the optical disc device. 제3항에 있어서, 상기의 감쇄상수 연산을 위한 제2단계는, 반사광의 세기신호를 시간의 함수로 미분처리하는 제1미분단계와, 상기 제1미분단계에서 미분 처리된 신호를 로그(log)함수 처리하는 함수처리단계와, 상기 함수처리단계에서 출력된 신호를 미분하여 감쇄상수(α)값을 출력하는 제2미분단계로 이루어짐을 특징으로 하는 광디스크 장치의 기록 전력 제어방법.The method of claim 3, wherein the second step for calculating the attenuation constant comprises: a first derivative step of differentially processing the intensity signal of the reflected light as a function of time, and a log of the signal differentially processed in the first derivative step. And a second derivative step of differentiating the signal output from the function processing step and outputting attenuation constant (α) value. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950050147A 1995-12-14 1995-12-14 Recording power control device and method of optical disk apparatus KR100189501B1 (en)

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KR100189501B1 KR100189501B1 (en) 1999-06-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040006078A (en) * 2002-07-09 2004-01-24 주식회사 히타치엘지 데이터 스토리지 코리아 Method for optimum recording a data on optical disc

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040006078A (en) * 2002-07-09 2004-01-24 주식회사 히타치엘지 데이터 스토리지 코리아 Method for optimum recording a data on optical disc

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