TW330287B - Optical disc apparatus and semiconductor device for control - Google Patents

Optical disc apparatus and semiconductor device for control

Info

Publication number
TW330287B
TW330287B TW086100285A TW86100285A TW330287B TW 330287 B TW330287 B TW 330287B TW 086100285 A TW086100285 A TW 086100285A TW 86100285 A TW86100285 A TW 86100285A TW 330287 B TW330287 B TW 330287B
Authority
TW
Taiwan
Prior art keywords
speed
pick
head
position information
driving
Prior art date
Application number
TW086100285A
Other languages
Chinese (zh)
Inventor
Tokuhisa Yanagihara
Takashi Yoshida
Atsushi Okuyama
Yasuhiro Mitsui
Mantetsu Aiba
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of TW330287B publication Critical patent/TW330287B/en

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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0929—Electromechanical actuators for lens positioning for tracking only
    • 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
    • G11B7/08529—Methods and circuits to control the velocity of the head as it traverses the tracks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs

Landscapes

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

Abstract

An optical disc apparatus, which consists of recording media having helical or concentrically circular track, and optical pick-up head carried on lens of the recording media illuminating beam spot, and circuit transmitting device for driving the optical pick-up head in a direction transversal to said track, and precision transfer apparatus for driving said lens transversal to said track orientation on said pick-up head, and means for detecting position information with respect to said track of said bean spot from reflected light of illuminating beam spot of said recording media, according to said position information driving said circuit transfer apparatus and precise transfer apparatus into disc apparatus, comprises the features: (1) Driving signal generating means for generating driving signal of said pick-up head according to said position information; (2) Speed predicting means for predicting the speed of said pick-up head according to the driving signal, and target speed generating means for generating target speed of said beam spot according to said position information; (3) Speed detecting means for detecting the speed transversal to said track orientation of said beam spot according to said position information; (4) First control means for control the driving of said precision transfer apparatus according to the difference between predicting speed of said pick-up head and said beam spot speed.
TW086100285A 1996-02-06 1997-01-13 Optical disc apparatus and semiconductor device for control TW330287B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8019653A JPH09212876A (en) 1996-02-06 1996-02-06 Optical disk device and control semiconductor element

Publications (1)

Publication Number Publication Date
TW330287B true TW330287B (en) 1998-04-21

Family

ID=12005216

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086100285A TW330287B (en) 1996-02-06 1997-01-13 Optical disc apparatus and semiconductor device for control

Country Status (3)

Country Link
JP (1) JPH09212876A (en)
KR (1) KR970063083A (en)
TW (1) TW330287B (en)

Also Published As

Publication number Publication date
KR970063083A (en) 1997-09-12
JPH09212876A (en) 1997-08-15

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