KR950004215A

KR950004215A - Double-sided LDP disk misinserting device

Info

Publication number: KR950004215A
Application number: KR1019930013204A
Authority: KR
Inventors: 김상서
Original assignee: 이헌조; 주식회사 금성사
Priority date: 1993-07-14
Filing date: 1993-07-14
Publication date: 1995-02-17

Abstract

본 발명의 목적은 양면 LDP에 싱글 레이저 디스크의 오삽시 이를 검출하여 반대면에 기록된 신호를 재생할 수 있도록 한 양면 엘디피(LDP)의 디스크 오삽시 재생장치에 관한 것으로 이와 같은 본 발명은 픽업에 의해 검출된 광검출신호를 연산하는 광검출신호 연산수단과, 상기 광검출신호 연산수단에서 연산된 전압값과 기준전압을 비교하여 그 결과값을 출력하는 제1비교수단과, 상기 픽업으로부터 출력된 RF신호를 소정레벨로 증폭하는 RF 증폭수단과, 상기 RF증폭수단으로부터 출력된 RF신호의 포락선을 검파하는 포락선 검파수단과, 상기 포락선 검파수단에서 검파된 포락선과 기준신호를 비교하여 그 결과값을 출력하는 제2비교수단과, 상기 제1, 제2비교수단으로부터 출력된 신호에 의해 디스크의 인입상태를 판별하는 디스크 인입상태 판별수단과, 상기 디스크 인입상태 판별수단으로 출력된 디스크 인입상태 판별신호에 의해 디스크 오삽시 재생을 제어하는 마이콤을 구성함으로써 달성되어지는 것이다.SUMMARY OF THE INVENTION The present invention relates to a double-sided LDP disc reproducing apparatus for detecting a misalignment of a single laser disc on a double-sided LDP and reproducing a signal recorded on the opposite side. Light detection signal calculating means for calculating the light detection signal detected by the first detection means, first comparing means for comparing the voltage value calculated by the light detection signal calculating means with a reference voltage, and outputting the resultant value; RF amplification means for amplifying the RF signal to a predetermined level, envelope detection means for detecting an envelope of the RF signal output from the RF amplification means, and the result detected by comparing the envelope detected by the envelope detection means with a reference signal. Second comparator means for outputting, disc retracted state discrimination means for discriminating the retracted state of the disc by signals output from the first and second comparator means; It is being achieved by configuring the microprocessor to control the disc o sapsi reproduced by the disk-based lead-state determination disc incoming state discrimination signal output means.

Description

Double-sided LDP disk misinserting device

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

제1도는 종래 양면 엘디피(LDP)의 재생 시스템 블럭구성도, 제2도는 제1도를 설명하기 위한 포커스 인입전압 파형을 보인도, 제3도는 제1도의 픽업내에서 촛점거리에 따른 4분할 광검출기에 포커싱되는 상을 보인도, 제4도의 (가) 및 (나)는 제1도의 각부 입출력 파형도.FIG. 1 is a block diagram of a conventional double-sided LDP regeneration system. FIG. 2 is a diagram showing a focus-in voltage waveform for explaining FIG. 1, and FIG. 3 is a quadrant divided according to a focal length in the pickup of FIG. Fig. 4A and Fig. 4B are the input / output waveform diagrams of each part of Fig. 1, showing the image focused on the photodetector.

Claims

Light detection signal calculating means for calculating the light detection signal detected by the pickup, first comparing means for comparing the voltage value calculated by the light detection signal calculating means with a reference voltage and outputting the resultant value from the pick-up; RF amplifying means for amplifying the output RF signal to a predetermined level, an envelope detecting means for detecting an envelope of the RF signal output from the RF amplifying means, and an envelope detected by the envelope detecting means and a reference signal as a result A second comparator for outputting a value, a disc retracting state discriminating means for discriminating a disc retracting state by means of signals output from said first and second comparing means, and a disc retracting state output to said disc retracting state discriminating means A double-sided LDP playback apparatus for disc misinsertion, characterized in that it comprises a micom for controlling playback upon disc misalignment by a discrimination signal.

※ Note: The disclosure is based on the initial application.