KR970017273A

KR970017273A - Focus control device of optical disc player

Info

Publication number: KR970017273A
Application number: KR1019950033573A
Authority: KR
Inventors: 정명환
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-09-30
Filing date: 1995-09-30
Publication date: 1997-04-30

Abstract

본 발명은 광 디스크 재생 장치의 포커스 제어 장치에 관한 것으로, 광 디스크 면 상에 광 픽업을 실행하여 검출된 값을 출력하는 광 픽업부(50)와, 포커스 에러 값을 검출하여 출력하며, 에러값에 따른 비교신호를 출력하는 비교부(10)와, 에러 값에 따른 에러 보상 제어 신호를 출력하는 구동 제어부(70)와, 비교부(10) 또는 상기 구동 제어부(70)의 출력 신호에 따라 포커스 보상 신호를 출력하는 보상부(30)와, 비교부(10)의 출력 신호를 스위칭 시켜주는 스위칭부(20)와, 스위칭부(20)를 스위칭하는 스위칭 신호를 발생하는 스위칭 제어부(20)와, 보상부(30)의 출력 신호에 따라 구동하는 구동부(40)를 포함한다.The present invention relates to a focus control apparatus of an optical disk reproducing apparatus, comprising: an optical pickup section (50) for performing optical pickup on an optical disk surface and outputting a detected value; A comparator 10 for outputting a comparison signal according to a signal, a drive controller 70 for outputting an error compensation control signal according to an error value, and a focus according to an output signal of the comparator 10 or the drive controller 70. A compensation unit 30 for outputting a compensation signal, a switching unit 20 for switching the output signal of the comparator 10, a switching control unit 20 for generating a switching signal for switching the switching unit 20, and The driving unit 40 may be driven according to the output signal of the compensator 30.

따라서, 본 발명은 외란등에 의한 큰 오차신호가 입력되어도 빠른 시간내에 포커스 에러를 포커스 제어범위내로 줄여 포커스 제어를 실행할 수 있는 효과가 있다.Therefore, the present invention has the effect of reducing the focus error within the focus control range and executing the focus control within a short time even when a large error signal due to disturbance or the like is input.

선택도 : 제3도Selectivity: third degree

Description

Focus control device of optical disc player

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

제3도는 본 발명의 바람직한 실시예에 따른 광 디스크 재생장치의 포커스 제어 장치의 블럭도.3 is a block diagram of a focus control apparatus of an optical disk reproducing apparatus according to a preferred embodiment of the present invention.

Claims

A focus control apparatus of an optical disk reproducing apparatus that performs focus control by detecting and compensating a focus error value generated by surface vibration or disturbance of an optical disk during reproduction, wherein the optical pickup is detected by executing an optical pickup on the optical disk surface. An optical pickup unit 50 for outputting the calculated value; Compare the output signal of the optical pickup unit 50 with a predetermined focus target value, detect and output an error value corresponding to the difference, and compare the error value with a predetermined reference value and output a comparison signal accordingly. Section 10; A driving controller 70 outputting an error compensation control signal according to the error value detected by the comparing unit 10 when the error value detected by the comparing unit 10 is greater than a predetermined reference value; A compensator (30) for outputting a focus compensation signal according to the output signal of the comparator (10) or the drive controller (70); A switching unit 20 for switching the output signal of the comparing unit 10; Generates a switching signal for switching the switching unit 20 according to a control signal provided from the comparing unit 10, but if the error value detected by the comparing unit 10 is greater than the preset reference value, the comparing unit 10. A switching control unit (20) for generating a switching signal for connecting the driving unit (70) to the driving control unit (70), or for generating a switching signal for connecting the comparison unit (10) to the compensation unit (30); And a driver (40) for driving in accordance with the output signal of the compensator (30).

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