WO2000038186A1 - Unite de disque - Google Patents

Unite de disque Download PDF

Info

Publication number
WO2000038186A1
WO2000038186A1 PCT/JP1999/007119 JP9907119W WO0038186A1 WO 2000038186 A1 WO2000038186 A1 WO 2000038186A1 JP 9907119 W JP9907119 W JP 9907119W WO 0038186 A1 WO0038186 A1 WO 0038186A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation speed
spindle motor
speed
signal
speed detection
Prior art date
Application number
PCT/JP1999/007119
Other languages
English (en)
Japanese (ja)
Inventor
Masahiko Shimizu
Original Assignee
Matsushita Electric Industrial Co., 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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to KR1020007008980A priority Critical patent/KR20010024928A/ko
Publication of WO2000038186A1 publication Critical patent/WO2000038186A1/fr

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/28—Speed controlling, regulating, or indicating
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
    • 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
    • G11B2220/2545—CDs
    • 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
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
    • G11B2220/2575—DVD-RAMs

Definitions

  • the present invention relates to a disk device that controls the rotation speed of a rotation motor that rotates a disk.
  • the disk device receives a command from an external device such as a host computer, searches for a target position, reads the target data from data recorded on the disk, and transfers the data to the external device.
  • Compact Disk) and CD-ROM (CD-Read Only Memory) are assumed to be played at 1x speed of CLV (Constant Linear Velocity).
  • a constant speed high-speed reading such as 4x speed or 8x speed of CLV is performed.However, to increase the search speed by a constant speed high speed reading by CLV such as 4x speed or 8x speed, the load on the spindle motor is required. Becomes so large that an expensive and large spindle motor is required. Therefore, in recent years, devices that play back discs recorded in C.LV with CAV (Constant Angular Velocity), and CLV playback but with a very wide raw range for high-speed search and This has realized a wide-range CLV system that has been developed. Both types greatly reduce the load on the spindle motor, A high-speed search is realized by using a small and small motor.
  • FIG. 3 is a diagram showing a configuration of a conventional compact disk device.
  • reference numeral 100 denotes a disk supported by a clamper 100, which is rotated by a spindle motor 102 which is feedback-controlled by a signal processing circuit 110 via a spindle motor control circuit 103.
  • Reference numeral 105 denotes an optical pickup for reading a signal from the disk 100, which focuses and is controlled by a focus coil controlled by a tracking control circuit 104 and a tracking coil 106. The tracking is adjusted, and the disk is moved in the radial direction of the disk by the traverse motor 108 controlled by the traverse motor control circuit 109.
  • Reference numeral 107 denotes an RF amplifier that extracts a focus error signal, a tracking error signal, and a KF signal from the output of the optical pickup 105
  • 110 denotes a traverse motor control circuit. This is a signal processing circuit that controls the 109, focus tracking control circuit 104, and spindle motor control circuit 103.
  • Reference numeral 111 denotes a system controller that switches between CLVZCAV and is connected to the signal processing circuit 110 and the signal processing circuit interface circuit 112.
  • the signal-processing circuit 110 generates control signals for focus servo and tracking servo based on the signal input from the KF amplifier 107, outputs the signals to the focus / tracking control circuit 104, and outputs RF signals.
  • PLL phase-locked loop
  • the generated signal frequency of the PLL clock is based on 4.3 218 MHz at CLV, its variation range is ⁇ several tens of percent, and the rotational speed of spindle motor 102 is always
  • the optical pickup 105 changes sequentially according to the track position where the optical pickup 105 is reading, so that the frequency of the PLL clock becomes constant, that is, the disk 100 rotates at CLV.
  • the signal processing circuit 110 calculates the rotational speed detection signal 200 from the spindle motor control circuit 103, and the optical pick-up] moves from the peripheral portion of the disk 100 toward the center.
  • the spindle motor control signal 20.sub.3 is output to the spindle motor control circuit 103 so that the rotation speed increases one after another.
  • the signal processing circuit 110 calculates the rotational speed detection signal 200 from the spindle motor control circuit] 03, and outputs the spindle motor control signal so that the disk 100 rotates with the CAV. Output 201 to the spindle motor control circuit 103.
  • the rotation speed detection signal 200 is always output as long as the spindle motor] 02 is rotating even if the RF signal is lost, so it is used to check the rotation state of the spindle motor 102. be able to. That is, in the conventional compact disk device, the focus or tracking deviates, the focus servo, or the tracking servo is monitored by the signal processing circuit 110 monitoring the rotation speed detection signal 200. Even when one button did not operate normally, the rotation state of the spindle motor 102 could be checked, preventing the spindle motor 102 from abnormally rotating or stopping.
  • a spindle motor is provided with one ball sensor along the inner circumference of the stator and uses a brushless motor that generates a pulse output of 2 ⁇ Lo ZH i per revolution, Rotation speed of bindle motor
  • the width of one panorama of the rotation speed detection signal which is the output of the spindle motor control circuit that detects the rotation speed, is 4.3 rasec for high-speed rotation, for example, at 700 rpm, and 1 for low-speed rotation, for example, at 20 ° rpm. 50 msec. Therefore, if the rotation speed of the spindle motor is detected using the IHJ rotation speed detection signal, the width of the ⁇ pulse of the rotation speed detection signal will be greater at low speed rotation than at high speed rotation. There was a question that a longer time was required to detect the rotation speed than at the time of high speed.
  • the present invention has been made to solve the above-mentioned conventional problems, and a disk device capable of detecting the rotation speed of a spindle motor in a short time even when the spindle motor rotates at a low speed.
  • the goal is to provide Disclosure of the invention
  • a disk device includes: a rotation speed detection unit that detects a rotation speed of a rotation motor; and a rotation speed detection interval switching unit that switches a rotation speed detection interval of a rotation speed detection unit.
  • the switching is performed so that the rotation speed detection interval of the rotation speed detection means is shortened.
  • FIG. 1 is a block diagram of a preferred compact disk device according to the present invention
  • FIG. 2 is a diagram for explaining an operation of switching a rotation speed detection interval of a spindle motor control circuit in the compact disk device.
  • FIG. 3 is a signal waveform diagram
  • FIG. 3 is a block diagram of a conventional compact disk device.
  • FIG. 3 is a block diagram of a preferred compact disk device according to the present invention.
  • This compact disk device is provided with a rotational speed for switching the rotational speed detection interval of the spindle motor control circuit 103 inside the spindle motor control circuit 103 of the conventional compact disk device shown in FIG.
  • a detection interval switching circuit 113 is provided.
  • FIG. 2 is a signal waveform diagram for explaining an operation of switching a rotation speed detection interval of a spindle motor control circuit in a preferred compact disk device according to the present invention.
  • the signal processing circuit 110 As shown in the figure, if the rotation speed of the spindle motor 102 is lower than the predetermined speed, the spindle motor control circuit 103 of the spindle motor control circuit 103 will select [El rotation speed detection interval so as to shorten the interval.
  • a rotation speed detection interval switching signal 202 is output to the rotation speed detection interval switching circuit 1 1 3 inside 3.
  • the spindle motor control circuit 103 detects the rotation speed of the spindle motor 1 If the speed is higher than the specified speed, only the output of one Hall sensor is used.
  • the signal processing circuit 1: 10 detects the rotation speed inside the spindle motor control circuit 103 so that the output of all three Hall sensors is used if the speed is lower than the predetermined speed. Outputs the rotation speed detection interval switching signal 202 to the interval switching circuit 113, and switches the rotation speed detection interval of the spindle motor control circuit 103 to rotate at a lower speed than the specified speed. Since the width of one pulse output by the spindle motor 102 becomes smaller, it is possible to detect the rotation speed of the spindle motor 102 in a short time even when the spindle motor 102 rotates at low speed. it can.
  • the rotation speed detection interval switching means detects the rotation speed of the spindle motor control circuit. Since the switching is performed so as to shorten the interval, the rotation speed of the spindle motor can be detected in a short time even when the spindle motor rotates at a low speed.
  • the disk device includes a CD, a CD-ROM, a CD (CD-Recordable), a CD-RW (CD-Re-Writable), and a DVD-ROM (Digital Video Disc-Read Only Memory). ), DVD-RAM (Digital Video Disc-Random Access Memory) and other devices that record and read information using a disc-shaped recording medium, and control the number of rotations of a rotating motor that rotates the disc It is useful as a device for performing

Landscapes

  • Rotational Drive Of Disk (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un circuit de commutation (113) d'intervalles de détection de la vitesse de rotation permettant de commuter un intervalle de détection de la vitesse de rotation d'un circuit de commande (103) de moteur d'entraînement. Ce circuit (113) est logé dans le circuit (103) de manière à commuter l'intervalle de détection de la vitesse de rotation du circuit (103) selon la vitesse de rotation du moteur d'entraînement (102). La vitesse de rotation du moteur (102) peut être détectée en peu de temps même malgré la réduction de la vitesse de rotation du moteur (102).
PCT/JP1999/007119 1998-12-18 1999-12-17 Unite de disque WO2000038186A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020007008980A KR20010024928A (ko) 1998-12-18 1999-12-17 디스크 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10361213A JP2000187931A (ja) 1998-12-18 1998-12-18 ディスク装置
JP10/361213 1998-12-18

Publications (1)

Publication Number Publication Date
WO2000038186A1 true WO2000038186A1 (fr) 2000-06-29

Family

ID=18472655

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/007119 WO2000038186A1 (fr) 1998-12-18 1999-12-17 Unite de disque

Country Status (5)

Country Link
JP (1) JP2000187931A (fr)
KR (1) KR20010024928A (fr)
CN (1) CN1178222C (fr)
ID (1) ID25863A (fr)
WO (1) WO2000038186A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100466927B1 (ko) * 2001-09-20 2005-01-24 주식회사 히타치엘지 데이터 스토리지 코리아 스핀들 모터의 회전 방향 및 속도 검출장치 및 방법
CN101567204B (zh) * 2008-04-22 2012-07-25 建兴电子科技股份有限公司 用于光驱的主轴马达模块
JP6428042B2 (ja) * 2014-08-21 2018-11-28 株式会社デンソー モータ制御装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02206386A (ja) * 1989-02-06 1990-08-16 Hitachi Ltd スピンドルモータ制御回路
JPH04188458A (ja) * 1990-11-22 1992-07-07 Seiko Epson Corp ディスクチャツチング機構及びこれを備えたフレキシブルディスクドライブ装置
JPH08275579A (ja) * 1995-03-31 1996-10-18 Sony Corp ディスク装置
JPH08293154A (ja) * 1995-04-21 1996-11-05 Citizen Watch Co Ltd フロッピーディスクドライブのチャッキング機構
JPH09306093A (ja) * 1996-05-15 1997-11-28 Toshiba Corp ディスク再生装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02206386A (ja) * 1989-02-06 1990-08-16 Hitachi Ltd スピンドルモータ制御回路
JPH04188458A (ja) * 1990-11-22 1992-07-07 Seiko Epson Corp ディスクチャツチング機構及びこれを備えたフレキシブルディスクドライブ装置
JPH08275579A (ja) * 1995-03-31 1996-10-18 Sony Corp ディスク装置
JPH08293154A (ja) * 1995-04-21 1996-11-05 Citizen Watch Co Ltd フロッピーディスクドライブのチャッキング機構
JPH09306093A (ja) * 1996-05-15 1997-11-28 Toshiba Corp ディスク再生装置

Also Published As

Publication number Publication date
CN1291330A (zh) 2001-04-11
CN1178222C (zh) 2004-12-01
KR20010024928A (ko) 2001-03-26
JP2000187931A (ja) 2000-07-04
ID25863A (id) 2000-11-09

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