JPS57133571A - Control device for information reproducing device - Google Patents

Control device for information reproducing device

Info

Publication number
JPS57133571A
JPS57133571A JP1941581A JP1941581A JPS57133571A JP S57133571 A JPS57133571 A JP S57133571A JP 1941581 A JP1941581 A JP 1941581A JP 1941581 A JP1941581 A JP 1941581A JP S57133571 A JPS57133571 A JP S57133571A
Authority
JP
Japan
Prior art keywords
address
information reading
reading means
time
current address
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.)
Pending
Application number
JP1941581A
Other languages
Japanese (ja)
Inventor
Satoru Tomita
Toshiharu Nozawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1941581A priority Critical patent/JPS57133571A/en
Publication of JPS57133571A publication Critical patent/JPS57133571A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08517—Methods for track change, selection or preliminary positioning by moving the head with tracking pull-in only

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To improve the precision of a stop position and to shorten the access time, by controlling a tracking means to be active or inactive and operating a timing on a basis of a target address and the current address. CONSTITUTION:During the high-speed movement, a switch 36 is turned off, and a tracking control is made inactive. Therefore, the position of a light spot coincides with a representative position of an information reading means 20, and the current address which is read at that time indicates the position of the information reading means accurately approximately. When the read current address is within a constant range (r) of the address of a target track, a time when the information reading means 20 is damped is determined on a basis of the target address and the current address, and at this time, applying the high-speed movement signal to a motor driving circuit 32 is stoped. When the information reading means 20 stops, the switch 36 is turned on again to reach the target track where the tracking control is restarted.
JP1941581A 1981-02-09 1981-02-09 Control device for information reproducing device Pending JPS57133571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1941581A JPS57133571A (en) 1981-02-09 1981-02-09 Control device for information reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1941581A JPS57133571A (en) 1981-02-09 1981-02-09 Control device for information reproducing device

Publications (1)

Publication Number Publication Date
JPS57133571A true JPS57133571A (en) 1982-08-18

Family

ID=11998616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1941581A Pending JPS57133571A (en) 1981-02-09 1981-02-09 Control device for information reproducing device

Country Status (1)

Country Link
JP (1) JPS57133571A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013206491A (en) * 2012-03-27 2013-10-07 Toshiba Corp Optical disk device and method for writing or reading data
CN110647173A (en) * 2019-10-10 2020-01-03 四川赛狄信息技术股份公司 Video tracking system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013206491A (en) * 2012-03-27 2013-10-07 Toshiba Corp Optical disk device and method for writing or reading data
CN110647173A (en) * 2019-10-10 2020-01-03 四川赛狄信息技术股份公司 Video tracking system and method

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