KR970002925A - Recording Density Discrimination Device for Optical Discs - Google Patents

Recording Density Discrimination Device for Optical Discs Download PDF

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Publication number
KR970002925A
KR970002925A KR1019950016643A KR19950016643A KR970002925A KR 970002925 A KR970002925 A KR 970002925A KR 1019950016643 A KR1019950016643 A KR 1019950016643A KR 19950016643 A KR19950016643 A KR 19950016643A KR 970002925 A KR970002925 A KR 970002925A
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KR
South Korea
Prior art keywords
density
signal
recording density
focus
disc
Prior art date
Application number
KR1019950016643A
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Korean (ko)
Inventor
남창우
Original Assignee
구자홍
Lg 전자 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.)
Filing date
Publication date
Application filed by 구자홍, Lg 전자 주식회사 filed Critical 구자홍
Priority to KR1019950016643A priority Critical patent/KR970002925A/en
Publication of KR970002925A publication Critical patent/KR970002925A/en

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Abstract

본 발명은 고밀도 CD재생장치에서 장착된 디스크가 저밀도 CD인지 고밀도 CD인지를 판별할 수 있도록 한 광디스크의 기록밀도판별장치에 관한 것으로, 일반적인 CD재생장치에서는 디스크의 기록밀도를 판별할 수 없어 각 기록밀도에 따른 재생조건을 만족시킬 수 없어 최적의 재생상태를 유지할 수 없었던 점을 감안하여 본 발명은 대물렌즈의 촛점이 디스크의 기록면에 정확히 집광된 위치에서 포커싱 오차신호를 검출하고 RF신호 정형부에서 RF신호를 정형후 이를 레벨 비교부에서 설정되어 있는 기준레벨과 비교하여 그 비교결과에 따라 마이컴에서 현재 장착된 디스크의 기록밀도를 판별할 수 있도록 함으로써 현재 장착된 디스크가 고밀도 CD인지 저밀도 CD인지를 정확히 판별할 수 있게 되어 고밀도 CD 및 저밀도 CD에 대해 최적의 재생상태를 유지할 수 있도록 한 것이다.The present invention relates to an optical disc recording density discrimination apparatus capable of discriminating whether a disc mounted in a high density CD reproducing apparatus is a low density CD or a high density CD. In view of the fact that the reproducing condition according to the density could not be satisfied, the present invention could not maintain an optimal reproducing state. In the present invention, a focusing error signal is detected at a position where the focus of the objective lens is exactly focused on the recording surface of the disc. After shaping the RF signal, it is compared with the reference level set by the level comparator and the microcomputer can determine the recording density of the currently loaded disc according to the comparison result. Accurate discrimination ensures optimal playback of high and low density CDs It will have to make.

Description

광디스크의 기록밀도판별장치Recording Density Discrimination Device for Optical Discs

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

제1도는 일반적인 CD재생장치의 포커스 서보회로의 블럭 구성도, 제2도 (가)는 제1도에서 포커스 렌즈 인입 동작시의 포커스 구동신호 파형도, (나)는 제1도의 포커스 오차신호 검출부의 출력신호파형도, 제3도는 본 발명에 따른 광디스크의 기록밀도판별장치의 블럭 구성도.FIG. 1 is a block diagram of a focus servo circuit of a typical CD player, FIG. 2A is a waveform diagram of a focus drive signal during a focus lens insertion operation in FIG. 1, and B is a focus error signal detector of FIG. Fig. 3 is a block diagram of the recording density discrimination apparatus of the optical disc according to the present invention.

Claims (1)

디스크의 신호면과 대물렌즈의 사이의 거리를 검출하여 포커스 에러신호를 출력하는 포커스 오차신호 검출부와 상기 포커스 오차신호 검출부의 검출거리가 일정한 값을 유지하도록 픽업의 위치를 변경시키는 포커스 구동부를 구비하는 광디스크 재생시스템에 있어서, 포커스 렌즈 인입동작시 디스크로부터 반사되는 전광량을 적분한 RF신호를 검출하여 정형하는 RF신호 정형부와, 상기 RF신호 정형부의 출력신호의 레벨을 기록밀도 판별을 위해 설정된 기준레벨과 비교하는 레벨 비교부와, 상기 레벨 비교부의 출력으로부터 장착된 디스크의 기록밀도를 판별하는 마이컴을 더 구비함을 특징으로 하는 광디스크의 기록밀도판별장치.A focus error signal detector for detecting a distance between the signal surface of the disk and the objective lens and outputting a focus error signal; and a focus driver for changing the position of the pickup so that the detection distance of the focus error signal detector is maintained at a constant value; In an optical disc reproducing system, an RF signal shaping unit for detecting and shaping an RF signal integrating the total amount of light reflected from a disk during a focus lens retracting operation, and a reference set for determining the density of an output signal of the RF signal shaping unit And a microcomputer for discriminating the recording density of the mounted disk from the output of said level comparing unit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950016643A 1995-06-21 1995-06-21 Recording Density Discrimination Device for Optical Discs KR970002925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950016643A KR970002925A (en) 1995-06-21 1995-06-21 Recording Density Discrimination Device for Optical Discs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950016643A KR970002925A (en) 1995-06-21 1995-06-21 Recording Density Discrimination Device for Optical Discs

Publications (1)

Publication Number Publication Date
KR970002925A true KR970002925A (en) 1997-01-28

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Application Number Title Priority Date Filing Date
KR1019950016643A KR970002925A (en) 1995-06-21 1995-06-21 Recording Density Discrimination Device for Optical Discs

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990000749A (en) * 1997-06-10 1999-01-15 김영환 CD / DVD Discrimination Device Using Focusing Error
KR100288977B1 (en) * 1997-12-30 2001-05-02 윤종용 Optical disc discriminating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990000749A (en) * 1997-06-10 1999-01-15 김영환 CD / DVD Discrimination Device Using Focusing Error
KR100288977B1 (en) * 1997-12-30 2001-05-02 윤종용 Optical disc discriminating device

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