JPH0877688A - Optical disc player - Google Patents
Optical disc playerInfo
- Publication number
- JPH0877688A JPH0877688A JP23416994A JP23416994A JPH0877688A JP H0877688 A JPH0877688 A JP H0877688A JP 23416994 A JP23416994 A JP 23416994A JP 23416994 A JP23416994 A JP 23416994A JP H0877688 A JPH0877688 A JP H0877688A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- motor
- optical disk
- detecting
- rotation
- 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.)
- Withdrawn
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
- Rotational Drive Of Disk (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、レーザーディスクプレ
ーヤ等の光デイスク再生装置の回転駆動系に異常動作が
発生した場合のプレーヤ及びディスクを保護する装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for protecting a player and a disc when an abnormal operation occurs in a rotary drive system of an optical disc reproducing device such as a laser disc player.
【0002】[0002]
【従来の技術】再生中にプレーヤを傾けた場合や振動が
加えられた場合等の異常動作によって、ディスクのクラ
ンプ状態が外れる等の異常動作の検出方式として、フォ
ーカス外れ及び再生情報の連続的な欠落等を検出して、
異常検出後サーボ系の再制御動作により異常動作の正常
化の対処を行っていた。2. Description of the Related Art As a method of detecting an abnormal operation such as the disc being out of the clamped state due to an abnormal operation such as tilting the player or vibration during reproduction, continuous defocusing and reproduction of information is performed. Detecting missing parts etc.,
After the error was detected, the servo system was re-controlled to correct the abnormal operation.
【0003】[0003]
【発明が解決しようとする課題】従来のディスク再生装
置の異常動作の検出方式においては異常動作の検出が困
難であり、異常動作に対応する処理に時間がかかり過ぎ
る欠点があった。そのため、高速回転中のディスクのク
ランプ状態からの外れや浮きによりモータに加わる負荷
が軽くなるためターンテーブルが異常に高速回転し、こ
の高速回転中のターンテーブルに一瞬ディスクが正常に
系合しようとして跳ねとばされ、高速回転中のターンテ
ーブルからデイスクが外れ、外れて高速回転するデイス
クに起因するプレーヤ及びディスクの損傷を防止するこ
とが出来なかった。However, in the conventional method for detecting an abnormal operation of the disk reproducing apparatus, it is difficult to detect the abnormal operation, and there is a drawback that the processing corresponding to the abnormal operation takes too much time. Therefore, the load applied to the motor is lightened due to the disc coming out of the clamped state or floating during high-speed rotation, and the turntable rotates abnormally at high speed.For a moment, the turntable is trying to properly connect to the turntable during high-speed rotation. It was not possible to prevent the player and the disc from being damaged due to the disc coming off from the turntable being spattered and rotating at high speed and coming off and rotating at high speed.
【0004】[0004]
【課題を解決するための手段】本発明は、光ディスクを
回転駆動し再生する装置において、光ディスクをターン
テーブルに装着し回転する駆動手段と、回転を検出しパ
ルスを発生するパルス発生手段と、パルス発生手段から
出力されるパルスの発生信号を計測し駆動手段に加わる
負荷の異常を検出する手段を具備し、負荷の異常を検出
し駆動手段を停止する光ディスク再生装置である。ま
た、光ディスクを回転駆動し再生する装置において、光
ディスクをターンテーブルに装着し回転するモータと、
モータの回転を検出しパルスを発生するパルス発生手段
と、パルス発生手段から発生されるパルス数を電圧に変
換し回転速度情報信号を得るFV変換手段と、回転速度
情報信号から加速度情報信号を得る手段と、正常範囲か
ら加速度情報信号が外れたことを検出する検出手段を具
備し、モータを停止する光ディスク再生装置である。DISCLOSURE OF THE INVENTION The present invention relates to a device for rotating and reproducing an optical disk, a drive means for mounting the optical disk on a turntable and rotating, a pulse generating means for detecting the rotation and generating a pulse, and a pulse. The optical disk reproducing apparatus includes means for measuring a pulse generation signal output from the generating means and detecting a load abnormality applied to the driving means, and detecting the load abnormality and stopping the driving means. Further, in an apparatus for rotating and reproducing an optical disc, a motor for mounting the optical disc on a turntable and rotating it,
Pulse generation means for detecting rotation of the motor and generating pulses, FV conversion means for converting the number of pulses generated by the pulse generation means into a voltage to obtain a rotation speed information signal, and acceleration information signal from the rotation speed information signal. The optical disk reproducing apparatus includes means and a detecting means for detecting that the acceleration information signal deviates from the normal range, and stops the motor.
【0005】[0005]
【作用】FG(Frequency Generato
r)パルスの幅又は周期等を検出しその急激な変化を異
常発生と直ちに判断しディスクの回転の減速及び停止動
作を行うことにより、ディスク又はプレーヤのそれ以上
の高速回転・FGサーボが外れた異常動作状態が停止さ
れ、プレーヤ及びディスクの損傷を防止することができ
る。又、パルス発生手段から発生した信号のパルス数、
パルス周期或いはパルス幅からFV変換し回転速度信号
から加速度信号を得て、所定の変動幅を超えると異常動
作が発生したと判断することが出来、回転異常の検出精
度を上げることができる。[Function] FG (Frequency Generato)
r) Detecting the pulse width or cycle, and immediately judging the sudden change as abnormal occurrence, and decelerating and stopping the rotation of the disk, the high-speed rotation of the disk or the player and the FG servo are disengaged. The abnormal operation state is stopped, and damage to the player and the disc can be prevented. Also, the number of pulses of the signal generated from the pulse generating means,
By performing FV conversion from the pulse period or pulse width to obtain the acceleration signal from the rotation speed signal, it is possible to determine that an abnormal operation has occurred when exceeding a predetermined fluctuation width, and it is possible to improve the detection accuracy of the rotation abnormality.
【0006】[0006]
【実施例】本発明を一実施例により説明する。図1は本
発明の一実施例を示すブロック図である。スピンドルモ
ータ1によって回転駆動されるターンテーブル2にCD
或いはLD等の光ディスク3が載置され、クランパ4で
固着される。光ディスク3を回転駆動するスピンドルモ
ータ1に設けたFGパルス発生装置5から回転数に比例
して発生されるパルスを検出回路6で検出し、マイクロ
コンピュータ(CPU)7で信号処理が成され、モータ制
御回路8を介してスピンドルモータ1の回転制御がなさ
れる。回転駆動される光ディスク3に記録された信号を
再生するためにフォーカスサーボF,トラッキングサー
ボTR及びスレッドサーボSL等の制御がCPUから成
され、光ピックアップ9から再生された信号は再生回路
10で再生信号処理が成されて音声及び画像信号がAOU
T11及びVOUT12から出力される。EXAMPLES The present invention will be described by way of examples. FIG. 1 is a block diagram showing one embodiment of the present invention. CD on the turntable 2 which is rotated by the spindle motor 1.
Alternatively, an optical disk 3 such as an LD is placed and fixed by a clamper 4. A detection circuit 6 detects a pulse generated from an FG pulse generator 5 provided in a spindle motor 1 for rotating an optical disk 3 in proportion to the number of revolutions, and a signal processing is performed by a microcomputer (CPU) 7 to generate a motor. The rotation control of the spindle motor 1 is performed via the control circuit 8. The CPU controls the focus servo F, the tracking servo TR, the sled servo SL, etc. to reproduce the signal recorded on the optical disk 3 which is rotationally driven, and the reproduction circuit 10 reproduces the signal reproduced from the optical pickup 9. Audio and video signals are processed by AOU after signal processing.
It is output from T11 and VOUT12.
【0007】図2はFGパルス発生装置の出力パルスの
異常を判定する動作を説明するための図である。図2に
おいて、デイスクが一定角速度(CAV)で正常回転し
ている時、例えば回転数は約1800rpmで時間軸変
動成分(ジッター及び回転ムラ等)を含めそのFGパルス
の周期はT1=3.3±1.0[ms] であり正常回転の範
囲を約30%以内の範囲とすればよい。光ディスク3が
クランプ4から外れる等の異常動作によってスピンドル
モータ1に加わる負荷が急激に変化し回転負荷が軽減し
た場合、その周期T2は周期T2 <<T1 となり、これ
をFG検出装置にて異常動作とCPU7で判定し、ただ
ちに時間t1 後、駆動回路への電力供給を停止させる。
スピンドルモータ1への電力供給をモータ制御回路8か
ら制御出力を出力し駆動電力の供給を停止させることに
より、スピンドルモータ1は加速状態から外れ、シャフ
トの摩擦等により減速し時間t2 後すみやかに停止す
る。又線速度一定のCLVデイスクの場合は、正常動作
時の発生パルス幅が光ディスク3に対する光ピックアッ
プ9の位置により回転周期が変わるので、その相対比較
データを記憶装置に記憶しておき、光ピツクアツプ9の
位置に対応する回転周期との比較検出がなされ異常回転
が検出される。FIG. 2 is a diagram for explaining the operation of determining an abnormality in the output pulse of the FG pulse generator. In FIG. 2, when the disk is normally rotating at a constant angular velocity (CAV), for example, the rotation speed is about 1800 rpm, and the period of the FG pulse including the time axis fluctuation component (jitter, rotation unevenness, etc.) is T1 = 3.3. It is ± 1.0 [ms], and the range of normal rotation should be within 30%. When the load applied to the spindle motor 1 suddenly changes due to an abnormal operation such as the optical disk 3 being disengaged from the clamp 4 and the rotational load is reduced, the cycle T2 becomes a cycle T2 << T1 and this is abnormally operated by the FG detection device. It is determined by the CPU 7 that the power supply to the drive circuit is stopped immediately after time t1.
By outputting a control output from the motor control circuit 8 to supply power to the spindle motor 1 and stopping the supply of drive power, the spindle motor 1 deviates from the accelerating state, decelerates due to shaft friction, etc., and stops immediately after time t2. To do. In the case of a CLV disk with a constant linear velocity, the rotation cycle of the pulse width generated during normal operation changes depending on the position of the optical pickup 9 with respect to the optical disk 3. Therefore, the relative comparison data is stored in a storage device and the optical pickup 9 is used. The abnormal rotation is detected by comparison detection with the rotation cycle corresponding to the position.
【0008】以上はCPU7で検出し判定する説明をし
たが、図3は、本発明の他の一実施例による比較回路を
示す。この検出回路で異常が検出されたときはスピンド
ルモータの電源回路を切断する回路構成に成すことで異
常回転増しを停止せしめることができる。FG装置5か
ら発生されるパルス数をFVコンバータ13にて速度情
報としての電圧(A)に変換し、微分回路14にて加速度
情報(B)に変換する。図4に動作判定範囲を示す。微分
回路14の出力を正常動作範囲のしきい値に上限及び下
限を設定したウインドコンパレータ15に入力し、ただ
ちに(T’後)その出力(C)を異常動作検出信号として
出力し、図示せずもスピンドルモータ1の電源スイツチ
を遮断し、モータを停止する。このようにして高速回転
する光ディスク3とこれを高出力で駆動制御するスピン
ドルモータ1とを連結するターンテーブル2とクランパ
4の装着関係の異常をただちに検出し停止せしめること
ができる。Although the CPU 7 detects and determines the above, FIG. 3 shows a comparison circuit according to another embodiment of the present invention. When an abnormality is detected by this detection circuit, the power supply circuit of the spindle motor is cut off so that the abnormal rotation increase can be stopped. The number of pulses generated from the FG device 5 is converted into a voltage (A) as speed information by the FV converter 13, and converted into acceleration information (B) by the differentiating circuit 14. FIG. 4 shows the motion determination range. The output of the differentiating circuit 14 is input to the window comparator 15 whose upper and lower limits are set to the threshold value of the normal operation range, and immediately (after T ') its output (C) is output as an abnormal operation detection signal, which is not shown. Also shuts off the power switch of the spindle motor 1 and stops the motor. In this way, it is possible to immediately detect and stop an abnormality in the mounting relationship between the turntable 2 and the clamper 4 that connect the optical disk 3 that rotates at high speed and the spindle motor 1 that drives and controls the optical disk 3 at high output.
【0009】[0009]
【発明の効果】本発明によるとFGパルスを検出しその
スピンドルモータに加わる負荷の異常を直ちに検出し駆
動装置を停止するので光ディスクが高速回転時に発生す
る異常動作による光ディスクや装置の破損を未然に防止
することができる。According to the present invention, an FG pulse is detected, an abnormality in the load applied to the spindle motor is immediately detected, and the drive unit is stopped. Therefore, damage to the optical disk or the apparatus due to an abnormal operation that occurs when the optical disk rotates at high speed can be prevented. Can be prevented.
【図1】本発明による一実施例のブロック図。FIG. 1 is a block diagram of an embodiment according to the present invention.
【図2】異常動作を説明する図。FIG. 2 is a diagram illustrating an abnormal operation.
【図3】本発明の他の一実施例のブロック図。FIG. 3 is a block diagram of another embodiment of the present invention.
【図4】判定範囲を説明する図。FIG. 4 is a diagram illustrating a determination range.
1 スピンドルモータ 2 ターンテーブル 3 光ディスク 4 クランパ 5 FGパルス発生装置 6 検出回路 7 CPU 8 モータ制御回路 9 光ピックアップ 10 再生回路 11 AOUT 12 VOUT 13 FVコンバータ 14 微分回路 15 ウインドコンパレータ 16 サーボ回路 1 Spindle Motor 2 Turntable 3 Optical Disc 4 Clamper 5 FG Pulse Generator 6 Detection Circuit 7 CPU 8 Motor Control Circuit 9 Optical Pickup 10 Reproduction Circuit 11 AOUT 12 VOUT 13 FV Converter 14 Differentiation Circuit 15 Wind Comparator 16 Servo Circuit
Claims (2)
置において、上記光ディスクをターンテーブルに装着し
回転する駆動手段と、上記回転を検出しパルスを発生す
るパルス発生手段と、上記パルス発生手段から出力され
るパルス信号から上記駆動手段に加わる負荷の異常変化
を検出する手段を具備し、上記異常変化を検出し上記駆
動手段を停止することを特徴とする光ディスク再生装
置。1. An apparatus for rotating and recording and reproducing an optical disk, wherein the optical disk is mounted on a turntable and rotated, a drive means for detecting the rotation, a pulse generating means for generating a pulse, and an output from the pulse generating means. An optical disk reproducing apparatus comprising means for detecting an abnormal change in the load applied to the driving means from the pulse signal generated, and stopping the driving means upon detecting the abnormal change.
置において、上記光ディスクをターンテーブルに装着し
回転するモータと、上記モータの回転を検出しパルスを
発生するパルス発生手段と、上記パルス発生手段から発
生されるパルスを電圧に変換し回転速度情報信号を得る
FV変換手段と、上記回転速度情報信号から加速度情報
信号を得る手段と、正常範囲から上記加速度情報信号が
外れたことを検出する検出手段を具備し、上記モータを
停止することを特徴とする光ディスク再生装置。2. A device for rotating and recording and reproducing an optical disk, wherein a motor rotates the optical disk by mounting the optical disk on a turntable, pulse generating means for detecting rotation of the motor and generating a pulse, and the pulse generating means. FV conversion means for converting the generated pulse into voltage to obtain a rotation speed information signal, means for obtaining an acceleration information signal from the rotation speed information signal, and detection means for detecting that the acceleration information signal deviates from the normal range. An optical disk reproducing apparatus comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23416994A JPH0877688A (en) | 1994-09-02 | 1994-09-02 | Optical disc player |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23416994A JPH0877688A (en) | 1994-09-02 | 1994-09-02 | Optical disc player |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0877688A true JPH0877688A (en) | 1996-03-22 |
Family
ID=16966752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23416994A Withdrawn JPH0877688A (en) | 1994-09-02 | 1994-09-02 | Optical disc player |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0877688A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100314132B1 (en) * | 1999-10-25 | 2001-11-15 | 윤종용 | Apparatus and method for controlling spindle motor velocity of optical disk reproducing system |
KR20020097386A (en) * | 2001-06-20 | 2002-12-31 | 삼성전자 주식회사 | Data protecting apparatus for portable device and a protecting method using the same |
KR100475088B1 (en) * | 2002-08-23 | 2005-03-10 | 삼성전자주식회사 | Protection apparatus against disc explosion in the disc drive and method thereof |
JP2008542962A (en) * | 2005-05-30 | 2008-11-27 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Optical storage medium read / write method and apparatus with improved reliability |
-
1994
- 1994-09-02 JP JP23416994A patent/JPH0877688A/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100314132B1 (en) * | 1999-10-25 | 2001-11-15 | 윤종용 | Apparatus and method for controlling spindle motor velocity of optical disk reproducing system |
KR20020097386A (en) * | 2001-06-20 | 2002-12-31 | 삼성전자 주식회사 | Data protecting apparatus for portable device and a protecting method using the same |
KR100475088B1 (en) * | 2002-08-23 | 2005-03-10 | 삼성전자주식회사 | Protection apparatus against disc explosion in the disc drive and method thereof |
JP2008542962A (en) * | 2005-05-30 | 2008-11-27 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Optical storage medium read / write method and apparatus with improved reliability |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20011106 |