JPS6450240A - Optical disk device - Google Patents

Optical disk device

Info

Publication number
JPS6450240A
JPS6450240A JP62206970A JP20697087A JPS6450240A JP S6450240 A JPS6450240 A JP S6450240A JP 62206970 A JP62206970 A JP 62206970A JP 20697087 A JP20697087 A JP 20697087A JP S6450240 A JPS6450240 A JP S6450240A
Authority
JP
Japan
Prior art keywords
signal
focus error
leakage signal
circuit
leakage
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP62206970A
Other languages
Japanese (ja)
Other versions
JP2565233B2 (en
Inventor
Shigeaki Wachi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP62206970A priority Critical patent/JP2565233B2/en
Priority to US07/171,256 priority patent/US5003523A/en
Priority to AT88302578T priority patent/ATE96568T1/en
Priority to EP88302578A priority patent/EP0284377B1/en
Priority to DE88302578T priority patent/DE3885131T2/en
Priority to KR1019880003211A priority patent/KR960011789B1/en
Publication of JPS6450240A publication Critical patent/JPS6450240A/en
Priority to HK119895A priority patent/HK119895A/en
Application granted granted Critical
Publication of JP2565233B2 publication Critical patent/JP2565233B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To prevent a focus error from being generated, by controlling a blind sector circuit which eliminates a leakage signal based on the signal level of the leakage signal mixed in a focus error signal. CONSTITUTION:The blind sector circuit 23 which suppresses a voltage by prescribed ranges of VF1 and VF2 setting a hold voltage VH held at a hold circuit 16 and outputs it as the input voltage VH of the hold circuit 16, leakage signal detection circuits 32, 33, 40, and 43 which detect the signal level VC of the leakage signal SM1 modulated by a pre-group from the focus error signal SFE1, blind sector width control circuits 25, 26, 48, and 57 which control the range VF1 and VF2 of the signal level are provided. By controlling the signal levels VF1 and VF2 suppressed by the blind sector circuit 23 based on the detected result of the leakage signal, it is possible to prevent the focus error from being generated by eliminating the leakage signal mixed in the focus error signal.
JP62206970A 1987-03-25 1987-08-20 Optical disk device Expired - Fee Related JP2565233B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP62206970A JP2565233B2 (en) 1987-08-20 1987-08-20 Optical disk device
US07/171,256 US5003523A (en) 1987-03-25 1988-03-21 Apparatus for recording and reproducing information on an optical disk with a focus servo system for avoiding influence of traverse signal during search
EP88302578A EP0284377B1 (en) 1987-03-25 1988-03-24 Optical disc recording and/or reproducing apparatus and focus control systems for such apparatus
DE88302578T DE3885131T2 (en) 1987-03-25 1988-03-24 Optical disc recording or reproducing apparatus and focus control systems therefor.
AT88302578T ATE96568T1 (en) 1987-03-25 1988-03-24 OPTICAL DISC RECORDER OR PLAYBACK DEVICE AND FOCUS CONTROL SYSTEMS THEREOF.
KR1019880003211A KR960011789B1 (en) 1987-03-25 1988-03-25 Optical disk recording & reproducing apparatus
HK119895A HK119895A (en) 1987-03-25 1995-07-20 Optical disc recording and/or reproducing apparatus and focus control systems for such apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62206970A JP2565233B2 (en) 1987-08-20 1987-08-20 Optical disk device

Publications (2)

Publication Number Publication Date
JPS6450240A true JPS6450240A (en) 1989-02-27
JP2565233B2 JP2565233B2 (en) 1996-12-18

Family

ID=16532019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62206970A Expired - Fee Related JP2565233B2 (en) 1987-03-25 1987-08-20 Optical disk device

Country Status (1)

Country Link
JP (1) JP2565233B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8130602B2 (en) 2009-05-29 2012-03-06 Hitachi-Lg Data Storage, Inc. Optical disk drive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8130602B2 (en) 2009-05-29 2012-03-06 Hitachi-Lg Data Storage, Inc. Optical disk drive

Also Published As

Publication number Publication date
JP2565233B2 (en) 1996-12-18

Similar Documents

Publication Publication Date Title
JPS5758269A (en) Device for reproducing disk
KR900013480A (en) Tracking error detection device of optical disk device
JPS57186239A (en) Disc reproducing device
JPS57162110A (en) Disk reproducing device
JPS53110504A (en) Optical reproducing device
JPS6450240A (en) Optical disk device
JPS5653484A (en) Detecting device for integrated time
JPS51127774A (en) Temperature compensation circuit for radiant ray detector
JPS56148747A (en) Focus controller
JPS57185423A (en) Focusing device
JPS5668962A (en) Disk detecting circuit
JPS6423472A (en) Track seek device
JPS56140789A (en) Color balance control circuit
JPS5668807A (en) Temperature control device
JPS62264439A (en) Focus controller
JPS53110784A (en) Servo-motor driving circuit
JPS552927A (en) Automatic time correction device
JPS56148746A (en) Focus controller
JPS5764369A (en) Derivation groove detecting circuit of record player
JPS5280803A (en) Automatic focusing device
JPS57205820A (en) Automatic tracking correcting device
JPS5758212A (en) Magnetic disk defect detecting device
JPS57113424A (en) Locked-track detector of recorded-information reader
JPS5678281A (en) Signal processing circuit
JPS56134335A (en) Time mode detection equipment

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees