JP4260340B2 - Disk unit - Google Patents

Description

【００３６】
検出温度Ｔの範囲ｉ，ｉｉ，ｉｉｉは、予め定める温度０℃および５０℃で変化される。各範囲ｉ，ｉｉ，ｉｉｉの相互間の検出温度Ｔの変化が生じたとき、ステップｒ３では、全部調整モードが選択される。実施の他の形態では、検出温度Ｔが、たとえば範囲ｉｉ内に存在するとき、ステップｒ３では、一部調整モードを選択し、また範囲ｉ，ｉｉｉに存在するとき、ステップｒ３では全部調整モードを選択する。
【００３７】
起動失敗の動作６３では、調整部分である増幅器２３，２４；２６；３２，３３；３５；１６の調整後に、ディスク１の再生動作に移行できたかどうかが判断され、再生動作に移行できず、起動失敗が生じたとき、ステップｒ３では、全部調整モードが選択される。前記調整部分の調整後に、ディスク１の再生動作に移行することができたとき、すなわち起動失敗が生じないとき、ステップｒ３では、一部調整モードが選択される。
【００３８】
電源投入検出動作６４では、ディスク再生装置の電源投入が行われたかどうかが検出されるとともに、電源遮断直前に、挿排検出手段３７によってディスク１の交換が検出されたかどうかが判断される。メモリＭ２には、再生されるディスク１を識別するための信号がストアされており、再生動作時、再生中のディスク１の識別信号を検出して、メモリＭ２にストアしておく、したがって電源遮断が生じたとき、メモリＭ２では、電源遮断直前におけるディスク１を識別することができる。これによって電源投入時、ディスク１を再生して識別信号を検出し、メモリＭ２にストアされている電源遮断直前のディスク１の識別番号と比較し、こうして２つの比較される識別信号が異なっていれば、ディスク１が、電源遮断直前とは異なってディスクに変更されて交換されたことを検出することができる。電源投入時、電源遮断直前にディスク１が交換されていなければ、一部調整モードがステップｒ３において選択され、ディスク１が交換されていれば、ステップｒ３では全部調整モードが選択される。メモリ手段５５のストア内容は、電源遮断中にも、保持される。
【００３９】
ディスク１がＤＶＤの２層ディスクであって、ステップｒ５において、そのディスク１の第１記録層が、一部調整モードで自動調整動作される。ステップｒ６では、そのディスク１が、２層ディスクであるかどうかが判断され、２層ディスクでなければ、ステップｒ１０に移り、一連の動作を終了する。ディスク１が２層ディスクであることがステップｒ６で判断されると、次のステップｒ７では、第２記録層のフォーカスサーボ動作が行われ、第１記録層から第２記録層へのフォーカス制御のレイヤジャンプが行われる。ステップｒ８では、第２記録層のフォーカス制御が成功して合焦状態が達成されたかどうかが判断され、合焦状態が達成されていれば、ステップｒ９において、第２記録層の一部調整モードによる自動調整動作が行われる。第２記録層の合焦状態が達成されず、エラーが生じたことがステップｒ８で判断されると、ステップｒ４において、第２記録層に関する全部調整モードによる自動調整動作が行われる。
【００４０】
自動調整動作によって得られる前記調整部分の調整結果の値は、メモリＭ３にストアされる。こうしてディスク１の再生動作の前に、自動調整動作を行って、その調整結果の値を、各調整部分毎に、さらには２層ディスクでは、各記録層に関して、調整部分毎に、調整結果の値をストアしておく。したがってディスク１のその後の再生動作時には、メモリＭ３にストアされている調整結果の値を読出して各調整部分を最適に調整することが容易に可能になる。したがってメモリＭ３に調整結果の値をストアした後には、その調整結果の値を読出して調整動作を容易に行うことができるようになる。
【００４１】
ステップｒ４における全部調整モードおよびステップｒ５，ｒ９の一部調整モードでは、表２の○印で示される調整部分の自動調整動作が実行される。
【００４２】
【表２】

【００４３】
表２におけるフォーカシングバランスというのは、フォーカシングエラー検出回路２０における増幅器２３，２４のゲインのバランス調整を示す。フォーカシングサーボというのは、サーボ制御回路３１における増幅器２６のゲインの調整を示す。トラッキングバランスというのは、トラッキングエラー検出回路３０における増幅器３２，３３のゲインを調整する動作を示す。トラッキングサーボは、サーボ制御回路３１における増幅器３５のゲインを調整する動作を示す。データ処理というのは、増幅器１６のゲインを調整する動作を示す。全部調整モードでは、これらの全ての増幅器２３，２４；２６；３２，３３；３５；１６のゲインが、表２の○印で示されるように、自動調整動作される。一部調整モードでは、増幅器２３，２４；２６；３２，３３；３５のみのゲインの自動調整動作が行われ、増幅器１６のゲインの自動調整動作は行われない。
【００４４】
図３は、図２のディスク交換検出動作６１の処理回路５３による具体的な動作を説明するためのフローチャートである。ステップｓ１からステップｓ２に移り、挿排検出手段３７の出力に応答し、ディスク１が前述のように挿排口から一旦取出された後、同一または他のディスク１が挿入されて交換されたかどうかが判断される。ディスク１が交換されていれば、ステップｓ３において全部調整モードが選択される。ステップｓ２においてディスク１の交換が行われず、ディスク１が挿排口から取出されないことが判断されると、ステップｓ４では、一部調整モードが選択される。
【００４５】
図４は、図２の温度変化検出動作６２の処理回路５３による具体的な動作を説明するためのフローチャートである。ステップｕ１からステップｕ２に移り、温度検出素子５７によって検出される温度Ｔの範囲が、前述の図１に示される温度範囲ｉ，ｉｉ，ｉｉｉへの相互間で変化したかどうかが判断される。温度範囲ｉ，ｉｉ，ｉｉｉが相互に変化してその温度の変化が大きいとき、ステップｕ２からステップｕ３に移り、全部調整モードが選択される。温度変化が小さく、範囲ｉ，ｉｉ，ｉｉｉ間の相互の変化が生じなければ、ステップｕ４において一部調整モードが選択される。
【００４６】
本発明の実施の他の形態では、前述の一部調整モードに代えて、自動調整動作を行わない無調整モードが達成されるように構成されてもよい。
【００４７】
ディスクの交換を検出する動作６１では、本発明の実施の他の形態では、各ディスク１の光ピップアップ素子２によるＴＯＣ（Table of contents）情報を読出し、そのＴＯＣ情報に基づいて、前回の自動調整時のディスク１と同一であるかどうかを判断し、ディスク１が交換されたものと判断するようにしてもよい。
【００４８】
図５は、図２の起動失敗の検出動作６３の処理回路５３による具体的な動作を説明するためのフローチャートである。ステップｈ１からステップｈ２に移り、装填されたディスク１のフォーカスサーチ動作が行われ、ステップｈ３において再生動作が成功していなければ、すなわちデータ処理回路１８によるディスク１のデータが読出されなければ、次のステップｈ４に移る。こうしてステップｈ４では、再生動作が成功しない回数を計数し、その計数値が予め定める所定回数以上になったかどうかが判断される。所定回数以上、再生動作を繰返し、それでも、再生動作が成功しなければ、ステップｈ５に移る。ステップｈ５では、処理回路５３は駆動回路１５を動作させて、光ピックアップ２を、原点検出手段３９によって検出されるまで半径方向内方の原点に戻る。その後、再びステップｈ２においてフォーカスサーチ動作を行い、原点位置におけるディスク１のリードイン領域にストアされたデータ、たとえばディスク１の種類を表す情報を読出し、その読出した種類に基づき、再生動作を行う。
【００４９】
本発明は、ディスク１の再生だけでなく、記録を行うことができる装置に関連してもまた実施することができる。光ピップアップ素子２には、対物レンズを駆動する駆動手段が備えられ、その駆動手段の特性を自動調整するために、本発明がさらに実施されてもよい。本発明は、ディスク再生／記録装置に関連して実施されるだけでなく、そのほか、自動調整機能を有する電気的装置に関連して広範囲に実施することができる。相互に接続される複数の電気的手段のうちには、電気的または機械的特性が変化調整されるべき複数の調整部分が設けられており、電気的装置の動作を検出する状態検出手段の検出された状態に対応して、複数の調整部分のうち、全ての調整部分の調整動作を行う全部調整モードおよび一部分の調整部分の調整動作を行う一部調整モード、さらにそれらの全ての調整部分の自動調整動作を行わない無調整動作モードが選択されるように構成される。このような構成もまた、本発明の精神に含まれる。
【００５０】
【発明の効果】
請求項１の本発明によれば、他の記録層に対する調整動作の時間を短縮することができる。これによってユーザの待ち時間を短縮し、使い勝手が向上される。
【００５２】
請求項２の本発明によれば、検出手段によってディスクの交換が検出され、ディスクが抜取られず、交換されていないときには、調整手段の一部が選択され、選択された部分によってディスクの再生特性または記録特性が調整されるので、全ての調整手段が選択されて前記特性が調整される場合よりも、調整動作の時間の短縮を図ることができる。
また調整手段が設置される装置内の周囲温度が検出手段によって検出され、この検出された周囲温度の変化が小さいときには、調整手段の一部が選択され、選択された部分によって前記特性が調整されるので、全ての調整手段が選択されて前記特性が調整される場合に比べて、調整動作の時間の短縮を図ることができる。
またディスクの再生特性または記録特性の調整後に、ディスクの再生または記録動作に移行できないことが検出手段によって検出されたとき、調整制御手段は、たとえば全ての調整手段を選択し、選択した調整手段に前記特性を調整させる。また調整制御手段が複数の調整手段の一部を選択し、選択した部分に前記特性の調整をさせ、その後、ディスクの再生または記録動作に移行できないことが検出手段によって検出されたときには、調整をしなかった調整手段にも、前記特性を調整させるので、最適な調整結果が得られ、ディスクの再生または記録動作に移行することが確実になる。
また調整手段が設置される装置の電源変化が検出手段によって検出されるとき、電源遮断直前に、ディスクが抜取られておらず、ディスクの交換が行われていないことが検出されていれば、その電源投入後には、たとえば複数の調整手段の一部が選択され、選択された部分によってディスクの再生特性または記録特性が調整されるので、電源投入後の調整時間を短縮することができる。
【図面の簡単な説明】
【図１】本発明の実施の一形態のディスク再生装置の全体の構成を簡略化して示すブロック図である。
【図２】処理回路５３の動作を説明するためのフローチャートである。
【図３】図２のディスク交換検出動作６１の処理回路５３による具体的な動作を説明するためのフローチャートである。
【図４】図２の温度変化検出動作６２の処理回路５３による具体的な動作を説明するためのフローチャートである。
【図５】図２の起動失敗の検出動作６３の処理回路５３による具体的な動作を説明するためのフローチャートである。
【符号の説明】
１ ディスク
２ 光ピックアップ
３ 受光素子
２０ フォーカシングエラー検出回路
２３，２４；２６；３２，３３；３５；１６ 増幅器
３０ トラッキングエラー検出回路
３７ 挿排検出手段
５３ 処理回路
５５ メモリ手段
Ｍ１〜Ｍ３ メモリ[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a disk device for performing at least one of reproduction and recording of an optical disk and a magneto-optical disk.In placeRelated.
[0002]
[Prior art]
  Traditionally, compact disc (CD) and digitalVersatile2. Description of the Related Art In a disc playback apparatus that plays back a disc (DVD) or the like in a detachable / replaceable manner, prior to the disc playback operation, first, the operation states such as focus servo and tracking servo that are optimal for the loaded disc are set. As described above, an automatic adjustment operation of a plurality of predetermined adjustment portions for changing and adjusting the electrical characteristics, for example, a variable gain amplifier is performed. In this prior art, an automatic adjustment operation is performed for all the plurality of adjustment portions. Therefore, a long time is required for the adjusting operation. As a result, the waiting time of the user becomes longer and the usability becomes worse.
[0003]
[Problems to be solved by the invention]
  An object of the present invention is to provide a disc device that can perform an automatic adjustment operation quickly and in a short time before reproducing or recording a disc.PlaceIs to provide.
[0005]
[Means for Solving the Problems]
  The present inventionA disk device for playing back or recording on a disk,
  With an optical pickup,
  A focusing error detecting means for detecting a focusing error, a focusing control means for performing focusing control of the optical pickup in response to an output of the focusing error detecting means, a tracking error detecting means for detecting a tracking error, and a tracking error detecting means. Tracking control means for performing tracking control of the optical pickup in response to the output, and data processing means for processing data recorded on the disk or data recorded on the disk in response to the output of the optical pickup. Provided in each means to adjust each characteristicAdjustment means;
  SaiddiskDetection means for detecting the operating state of the device;
  Based on the detection result of the detection means,pluralOf adjustment meanshomeAt least someAdjustment meansSelect and adjustExecuteAdjustment control means,
  When the detection unit detects that the disk loaded in the disk device is a two-layer disk in which two recording layers are formed,
  The adjustment control means performs adjustment on a part of the predetermined adjustment means in adjustment of the adjustment means for the other recording layer after adjusting the adjustment means for one recording layer of the disc.The disk device is characterized by the above.
[0006]
  According to the present invention,A multi-layer disc such as a digital versatile disc (DVD) has two recording layers formed on one side in the thickness direction of the disc, and the detection means is an optical pickup that reproduces from one recording layer to another recording layer. For example, it is detected that the displacement of the objective lens or the like has been performed by focusing control. As a result, it is detected that the disk loaded in the disk device is a two-layer disk. The adjustment control means achieves the focusing state of the focusing servo system by the optical pickup with respect to one recording layer. First, all the adjustment means are selected, and the adjustment of the selected adjustment means is executed. After that, during the adjustment operation of the other recording layer, a predetermined part of the adjustment means is selected from among the plurality of adjustment means, and the adjustment of the selected adjustment means is executed. That is, the adjustment control means does not execute the adjustment operation for the adjustment means that does not change in characteristics when the recording layers are different during the adjustment operation of the other recording layer, and the characteristics are different when the recording layers are different. An adjustment operation is executed for some of the predetermined adjustment means that change. Therefore, it is possible to shorten the time for adjusting the other recording layer.
[0009]
  According to the present invention,The plurality of adjustment means include at least two of a focusing error detection means, a focusing control means, a tracking error detection means, a tracking control means, and data processing means for processing data recorded on the disk or data recorded on the disk. . The adjustment control means selects at least a part of the focusing error detection means, the focusing control means, the tracking error detection means, the tracking control means, and the data processing means included in the plurality of adjustment means, and the reproduction characteristics of the disc are selected in the selected portion. Or adjust the recording characteristics. Since the adjustment means to be adjusted is selected in this way, the adjustment is made prior to the reproduction or recording of the disc.Time can be shortened.
[0013]
  In the present invention, the detecting means comprises:furtherDisk replacement, saiddiskThe temperature in the apparatus, the state of transition to playback or recording of the disc after adjusting the characteristics,diskDevice power supplyConversionAt least one is detected.
[0014]
  According to the present invention, the detection means is replaced with a disk, the temperature in the apparatus in which the adjustment means is installed, the reproduction state or recording characteristic of the disk after adjustment, and the adjustment means is installed. Power supplyConversionAt least one is detected. When the detecting means detects replacement of a replaceable disc, the adjustment operation of the disc is performed, for example, reproduction is performed once, and then the disc is ejected to the disc device and removed or removed. When the disc is not removed and thus not replaced, the same disc remains loaded. For example, a part of the plurality of adjusting means is selected and selected by the selected portion. The playback or recording characteristics of the disc are adjusted. After the disc is removed and the same disc as before or a different disc is loaded, for example, all the adjusting means are selected, and the characteristics are adjusted by the selected adjusting means. When the disk is not removed in this way, a part of the adjusting means is selected as described above, and the characteristics are adjusted by the selected part, so that the characteristics are adjusted by selecting all the adjusting means. However, it is possible to shorten the time for the adjustment operation.
[0015]
  Inside the device where the adjustment means is installed by the detection meansAmbient temperatureIs detectedThis was detectedThe ambient temperature isThat has changed a lotIsWhen issued, the adjustment control means prior to playing or recording the disc,For example, select and adjust all adjustment methodsTo do. When the temperature change is large, the electrical characteristics of the optical pickup and the electrical circuitThe surroundingsDepending on the temperature, there may be a large change, so in order to reliably achieve playback and recording, when such a temperature change is large,Select all adjustment means and let the selected adjustment means adjust the playback characteristics or recording characteristics of the disc.When the temperature change is small,For example, select some of the adjustment means and adjust the characteristics to the selected part.ThethisAlso as described above when the temperature change is smallA part of the adjustment means is selected, and the characteristics are adjusted by the selected part.SoWhen all the adjustment means are selected and the characteristics are adjustedcompared toThe keyIt is possible to shorten the time for the adjusting operation.
[0016]
  Disc playback or recording characteristicsAfter making adjustments, when you try to play or record a disc, you cannot go to that playback or recording operation.IsStartIn stepsSo when detectedThe adjustment control means, for example, selects all the adjustment means and causes the selected adjustment means to adjust the characteristics. The adjustment control meansFor exampleSelect some of the adjustment means and let the selected part adjust the characteristics.After that, when you try to play or record the disc,Make adjustments after the inability to enter playback or recording is detected.Adjustment that was notTo the meansAlso,The characteristicsAdjustedSetThe In this way, an optimum adjustment result is obtained. This ensures the transition to disc playback or recording operations.
[0017]
  For example, when the disc playback or recording operation could not be entered, the output data of the discIn stepsTherefore, when it cannot be read correctly, the focus search operation by the focus servo system is out of servo during the playback transition, or the playback fails and the adjustment is not completed even after repeated retries. Such a retry operation takes longer than a predetermined time, or when the number of retries exceeds a predetermined value. When the playback operation is complete,OfThis is when reading of TOC (Table of Contents) information in the lead-in area is realized.
[0018]
  InspectionStartStage,Adjustment means are installedEquipmentPower changes, for exampleDetects whether the power has been turned on and immediately before turning off the power, DeIf it is detected that the disk has not been removed and the disk has not been replaced,For example, some of the adjustment means are selected, and the playback or recording characteristics of the disc are adjusted by the selected parts.The After this power is turned onKeyThe settling time can be shortened. The disc has been removed just before the power is turned off.IsIf detected by the output means, then power onIsWhen detected by the exit meansFor example, all the adjusting means are selected and the characteristics are adjusted..
[0022]
DETAILED DESCRIPTION OF THE INVENTION
  FIG. 1 is a block diagram showing a simplified overall configuration of a disc playback apparatus according to an embodiment of the present invention. Compact disc (CD) or digitalVersatileInformation recorded on a disc (DVD) is read by the optical pickup 2. The light receiving element 3 in the optical pickup 2 is divided into four light receiving portions A to D serving as reading means, and output signals from the light receiving portions A to D are supplied to amplifiers 4 to 7, respectively. The output signals a and c from the amplifiers 4 and 6 are supplied to the adder 8 and added to be derived as an output signal (a + c). Similarly, the output signals b and d of the amplifiers 5 and 7 are given to the adder 9 and added to be derived as an output signal (b + d).
[0023]
  Output signals (a + c) from the adders 8 and 9 (b+ D) is given to the adder 10 and is given as an output signal (a + b + c + d) to the amplifier 16 having a variable gain, and is inputted from the equalizer 17 to the data processing circuit 18 realized by a microcomputer or the like. . As a result, the digital signal output to the disk 1 is decoded from the line 11 and is derived as an analog signal such as an acoustic signal.The amplifier 16, the equalizer 17, and the data processing circuit 18 constitute a data processing means.It functions as an adjustment means.
[0024]
  Output signals a to d from the amplifiers 4 to 7 are also focused.errorProvided to a focusing error detection circuit 20 corresponding to detection means. IncreaseOutput signals b and c from the width detectors 5 and 6 are supplied to an adder 21, and output signals a and d from the amplifiers 4 and 7 are supplied to an adder 22. Output signals from the adders 21 and 22 are supplied to amplifiers 23 and 24 whose gains are variable. The outputs of these amplifiers 23 and 24 are given to a subtracter 25.The amplifiers 23 and 24 function as adjusting means.
[0025]
The output signal from the subtractor 25 is a value corresponding to the amount of deviation from the focal point of the optical pickup 2, and this output signal is given to the equalizer 29 via the amplifier 26 having a variable gain. The output of the equalizer 29 is given to the drive circuit 27. As a result, the actuator coil 28 is driven, the objective lens in the optical pickup 2 is moved in the direction perpendicular to the recording surface of the disc 1, and the optical pickup 2 is brought into focus, thus realizing the focusing servo.
[0026]
  The output signals (a + c) and (b + d) of the adders 8 and 9 are also supplied to amplifiers 32 and 33 whose gain of the tracking error detection circuit 30 corresponding to the tracking error detection means is variable. The outputs of these amplifiers 32 and 33 are given to a subtracter 34.Amplifiers 32 and 33Functions as an adjusting means.
[0027]
  The output of the subtracter 34 is supplied to an amplifier 35 having a variable gain, and further supplied to an equalizer 36. The output of the amplifier 35 provides an output having the relative phases of the signals (a + c) and (b + d), and this phase difference is provided to the equalizer 36, which corresponds to the tracking error. Yes. The output of the equalizer 36 is given to the drive circuit 42. As a result, the actuator coil 43 is driven, and the optical pickup 2 is displaced in a direction parallel to the disk 1 and perpendicular to a track 70 described later, thus realizing tracking servo. In the servo control circuit 31, the amplifier 26andEqualizer 29 is, FocusingControl meansAnd an amplifier 35andEqualizer 36 istrackingControl meansConfigure. Amplifier 26,35 is the keyIt functions as an adjustment means.
[0028]
  The servo control circuit 31 includes a processing circuit 12 realized by a microcomputer or the like, whereby servo control of the amplifiers 26 and 35 is performed, and control of the equalizers 29 and 36 is performed.. DeWhen the track 70 of the disk 1 travels in the direction of the arrow 71, the reflected light of the track 70 is first detected by the light receiving portions A and D arranged on the upstream side of the travel direction 71. At this time, if the track 70 is shifted to the light receiving portions C and D, when the pit 72 having a low reflectance approaches the light receiving portions A and D, the light receiving amount of the light receiving portion A is greater than the light receiving amount of the light receiving portion D. When the pit 72 passes through the light receiving portions A and D and reaches the light receiving portions B and C, the light receiving amount of the light receiving portion B becomes larger than the light receiving amount of the light receiving portion C. The tracking servo operation of the optical pickup 2 can be performed in accordance with such a deviation amount of the track 70. After the focusing servo is realized in this way, tracking servo is realized, and data on the disk 1 is reproduced.
[0029]
  The optical pickup 2 is reciprocated in the radial direction of the disk 1 by the driving means 15. The disk 1 is rotationally driven by the rotational driving means 13 around its axis. Whether or not the disc 1 is mounted in the insertion / extraction port of the present disc reproducing apparatus is detected by the insertion / extraction detection means 37.The insertion / extraction detection means 37 functions as a detection means.
[0030]
  The processing circuit 53 realized by a microcomputer or the like responds to the outputs of the amplifiers 4 to 7 and increases the gains of the amplifiers 23, 24; 32, 33 provided in the focusing error detection circuit 20 and the tracking error detection circuit 30, respectively. In accordance with the type of the disk 1 and the like, individual change adjustment is performed, and gains of the focusing servo amplifier 26 and the tracking servo amplifier 35 provided in the servo control circuit 31 are changed and adjusted. be able to. The processing circuit 12 provided in the servo control circuit 31 responds to the outputs of the processing circuit 53 and the circuits 20 and 30 to control the gain balance of the amplifiers 23 and 24 and adjust the gains of the amplifiers 32 and 33. Control the balance. Processing circuit 12And processing circuit 53Adjustment control meansConfigureTo do.Also,The processing circuit 53 is a detection handSteppedAnd function.
[0031]
  The processing circuit 53 is provided with memory means 55. The memory means 55 includes individual memories M1 to M3. The temperature detecting element 57 detects the ambient temperature of the present disc reproducing apparatus and gives a signal representing the detected temperature T to the processing circuit 53. The temperature detection element 57 is provided, for example, in the housing of the disk reproducing apparatus, and detects temperatures near various adjustment portions.The temperature detection element 57 functions as detection means.
[0032]
FIG. 2 is a flowchart for explaining the operation of the processing circuit 53. Steps r2 and r3 in FIG. 2 show an operation 57 for detecting the operation state of the disc reproducing apparatus shown in FIG. 1 for reproducing the disc 1 which is a CD or a DVD. Steps r5 to r8 show an operation 58 for detecting an operation state when the disc 1 is a DVD dual layer disc. Instead of the two-layer disc, a disc 1 in which a large number of recording layers are formed on one side in the thickness direction may be used.
[0033]
Moving from step r1 to step r2 in FIG. 2, the operation 61 for detecting the exchange of the replaceable disc 1 and the detection of the temperature T detected by the temperature detecting element 57 between the predetermined ranges i, ii and iii are detected. The operation 62 includes an operation 63 for detecting a start failure that has not been shifted to the reproduction of the disc 1 even after the automatic adjustment, and an operation 64 for detecting the power-on of the disc reproduction apparatus. In the disk replacement detection operation 61, the insertion / ejection detection means 37 detects whether or not the disk 1 is present at the insertion / ejection slot, the disk 1 is taken out from the insertion / ejection slot, and then the same or another disk is inserted. Then, it is detected whether or not the disk has been replaced. When the disk 1 is replaced, the all adjustment mode is selected in step r3. When the disk 1 is not replaced, the partial adjustment mode is selected.
[0034]
In the temperature change detection operation 62, the ranges i, ii, and iii of the detected temperature T corresponding to the detected temperature T of the temperature detecting element 57 are determined as shown in Table 1 and stored in the memory M1.
[0035]
[Table 1]

[0036]
The ranges i, ii, and iii of the detected temperature T are changed at predetermined temperatures of 0 ° C. and 50 ° C. When a change in the detected temperature T between the ranges i, ii, and iii occurs, the entire adjustment mode is selected in step r3. In another embodiment, for example, when the detected temperature T is within the range ii, the partial adjustment mode is selected at step r3, and when it is within the range i, iii, the full adjustment mode is selected at step r3. select.
[0037]
In the start failure operation 63, it is determined whether or not the reproduction operation of the disk 1 has been completed after the adjustment of the amplifiers 23, 24; 26; 32, 33; 35; When a start-up failure has occurred, the all adjustment mode is selected in step r3. When it is possible to shift to the reproduction operation of the disc 1 after adjustment of the adjustment portion, that is, when no start failure occurs, in step r3, the partial adjustment mode is selected.
[0038]
In the power-on detection operation 64, it is detected whether or not the power of the disk reproducing apparatus has been turned on, and it is determined whether or not the disk 1 has been exchanged by the insertion / extraction detection means 37 immediately before the power is turned off. A signal for identifying the disc 1 to be reproduced is stored in the memory M2, and during the reproduction operation, the identification signal of the disc 1 being reproduced is detected and stored in the memory M2, so that the power is shut off. When this occurs, the memory M2 can identify the disk 1 immediately before the power is shut off. As a result, when the power is turned on, the disc 1 is reproduced and the identification signal is detected and compared with the identification number of the disc 1 stored in the memory M2 immediately before the power is shut off, and thus the two comparison identification signals are different. In other words, it is possible to detect that the disk 1 has been changed to a disk and replaced, unlike immediately before power-off. When the power is turned on, if the disk 1 has not been replaced immediately before the power is turned off, the partial adjustment mode is selected in step r3. If the disk 1 has been replaced, the entire adjustment mode is selected in step r3. The stored contents of the memory means 55 are retained even during power shutdown.
[0039]
  The disc 1 is a DVD dual-layer disc, and in step r5, the first recording layer of the disc 1 is automatically adjusted in the partial adjustment mode. In step r6, it is determined whether or not the disk 1 is a two-layer disk. If the disk 1 is not a two-layer disk, the process proceeds to step r10, and a series of operations is terminated. If it is determined in step r6 that the disk 1 is a double-layer disk, the second step r7RecordA focus servo operation of the layer is performed, and a layer jump for focus control from the first recording layer to the second recording layer is performed. Step r8Then, it is determined whether or not the focus control of the second recording layer has been successful and the in-focus state has been achieved. If the in-focus state has been achieved, in step r9, the automatic adjustment by the partial adjustment mode of the second recording layer is performed. Adjustment operation is performed. If it is determined in step r8 that the in-focus state of the second recording layer has not been achieved and an error has occurred, in step r4, an automatic adjustment operation in the all adjustment mode for the second recording layer is performed.
[0040]
The value of the adjustment result of the adjustment part obtained by the automatic adjustment operation is stored in the memory M3. In this way, the automatic adjustment operation is performed before the reproduction operation of the disc 1, and the value of the adjustment result is obtained for each adjustment portion, and in the case of a dual-layer disc, the adjustment result is obtained for each adjustment portion for each recording layer. Store the value. Therefore, at the time of the subsequent reproduction operation of the disk 1, it is possible to easily adjust each adjustment portion optimally by reading the value of the adjustment result stored in the memory M3. Therefore, after the adjustment result value is stored in the memory M3, the adjustment result value can be read and the adjustment operation can be easily performed.
[0041]
In the all adjustment mode in step r4 and the partial adjustment mode in steps r5 and r9, the automatic adjustment operation of the adjustment portion indicated by the circle in Table 2 is executed.
[0042]
[Table 2]

[0043]
The focusing balance in Table 2 indicates the balance adjustment of the gains of the amplifiers 23 and 24 in the focusing error detection circuit 20. Focusing servo indicates adjustment of the gain of the amplifier 26 in the servo control circuit 31. The tracking balance indicates an operation for adjusting the gains of the amplifiers 32 and 33 in the tracking error detection circuit 30. The tracking servo indicates an operation for adjusting the gain of the amplifier 35 in the servo control circuit 31. Data processing indicates an operation of adjusting the gain of the amplifier 16. In the all adjustment mode, the gains of all these amplifiers 23, 24; 26; 32, 33; 35; 16 are automatically adjusted as indicated by the circles in Table 2. In the partial adjustment mode, the automatic gain adjustment operation of only the amplifiers 23, 24; 26; 32, 33; 35 is performed, and the automatic gain adjustment operation of the amplifier 16 is not performed.
[0044]
FIG. 3 is a flowchart for explaining a specific operation by the processing circuit 53 of the disk replacement detection operation 61 of FIG. Step s1 is followed by step s2, and in response to the output of the insertion / ejection detection means 37, whether or not the same or another disk 1 is inserted and replaced after the disk 1 is once taken out from the insertion / ejection slot as described above. Is judged. If the disk 1 has been replaced, the all adjustment mode is selected in step s3. If it is determined in step s2 that the disk 1 is not replaced and the disk 1 is not taken out from the insertion / ejection slot, in step s4, the partial adjustment mode is selected.
[0045]
FIG. 4 is a flowchart for explaining a specific operation by the processing circuit 53 of the temperature change detection operation 62 of FIG. Moving from step u1 to step u2, it is determined whether or not the range of the temperature T detected by the temperature detecting element 57 has changed between the temperature ranges i, ii, and iii shown in FIG. When the temperature ranges i, ii, and iii change with each other and the temperature changes greatly, the process proceeds from step u2 to step u3, and the all adjustment mode is selected. If the temperature change is small and there is no mutual change between the ranges i, ii, and iii, the partial adjustment mode is selected in step u4.
[0046]
In another embodiment of the present invention, a non-adjustment mode that does not perform an automatic adjustment operation may be achieved instead of the partial adjustment mode described above.
[0047]
In operation 61 for detecting disk replacement, in another embodiment of the present invention, the TOC (Table of contents) information by the optical pip-up element 2 of each disk 1 is read, and the previous automatic operation is performed based on the TOC information. It may be determined whether the disk 1 is the same as that at the time of adjustment, and it may be determined that the disk 1 has been replaced.
[0048]
FIG. 5 is a flowchart for explaining a specific operation by the processing circuit 53 of the activation failure detection operation 63 of FIG. From step h1 to step h2, the focus search operation of the loaded disc 1 is performed, and if the reproduction operation is not successful in step h3, that is, if the data on the disc 1 is not read by the data processing circuit 18, The process proceeds to step h4. Thus, in step h4, the number of times that the reproducing operation is not successful is counted, and it is determined whether or not the counted value has reached a predetermined number of times or more. The reproduction operation is repeated a predetermined number of times or more. If the reproduction operation is still not successful, the process proceeds to step h5. In step h5, the processing circuit 53 operates the driving circuit 15 to return the optical pickup 2 to the radially inward origin until it is detected by the origin detecting means 39. Thereafter, a focus search operation is performed again in step h2, data stored in the lead-in area of the disc 1 at the origin position, for example, information indicating the type of the disc 1, is read, and a reproduction operation is performed based on the read type.
[0049]
The invention can also be implemented in connection with an apparatus capable of recording as well as reproducing the disc 1. The optical pip-up element 2 is provided with driving means for driving the objective lens, and the present invention may be further implemented to automatically adjust the characteristics of the driving means. The present invention can be implemented not only in connection with a disc reproducing / recording apparatus but also widely in connection with an electrical apparatus having an automatic adjustment function. Among a plurality of electrical means connected to each other, a plurality of adjustment portions whose electrical or mechanical characteristics are to be adjusted and adjusted are provided, and detection of the state detection means for detecting the operation of the electrical device Corresponding to the adjusted state, among the plurality of adjustment portions, all adjustment modes for performing adjustment operations for all adjustment portions, partial adjustment modes for performing adjustment operations for some adjustment portions, and further for all of those adjustment portions The non-adjustment operation mode that does not perform the automatic adjustment operation is selected. Such a configuration is also included in the spirit of the present invention.
[0050]
【The invention's effect】
  According to the invention of claim 1,Adjustment of other recording layersTime can be shortened. This shortens the waiting time for the user and improves usability.
[0052]
  Claim2According to the present invention, when the change of the disc is detected by the detecting means, and the disc is not removed and not exchanged, a part of the adjusting means is selected, and the reproduction characteristic or recording characteristic of the disc is selected by the selected portion. Therefore, the adjustment operation time can be shortened as compared with the case where all the adjusting means are selected and the characteristics are adjusted.
  Further, when the ambient temperature in the apparatus in which the adjusting means is installed is detected by the detecting means, and the change in the detected ambient temperature is small, a part of the adjusting means is selected, and the characteristics are adjusted by the selected portion. Therefore, the time for the adjustment operation can be shortened as compared with the case where all the adjustment means are selected and the characteristics are adjusted.
  In addition, when the detection means detects that it is not possible to shift to the reproduction or recording operation of the disc after adjusting the reproduction characteristics or recording characteristics of the disc, the adjustment control means selects all the adjustment means, for example, and selects the selected adjustment means. The characteristic is adjusted. Further, the adjustment control means selects a part of the plurality of adjustment means, causes the selected part to adjust the characteristics, and then adjusts when it is detected by the detection means that it is not possible to shift to the reproduction or recording operation of the disc. The adjustment means that has not been adjusted also adjusts the above characteristics, so that an optimum adjustment result can be obtained, and it is ensured that the operation proceeds to the reproduction or recording operation of the disc.
  Also, when a change in the power supply of the device in which the adjusting means is installed is detected by the detecting means, if it is detected that the disk has not been removed and the disk has not been replaced immediately before the power is turned off, After the power is turned on, for example, a part of the plurality of adjusting means is selected, and the reproduction characteristic or recording characteristic of the disc is adjusted by the selected part, so that the adjustment time after the power is turned on can be shortened..
[Brief description of the drawings]
FIG. 1 is a block diagram showing a simplified overall configuration of a disk playback apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart for explaining the operation of a processing circuit 53;
3 is a flowchart for explaining a specific operation by the processing circuit 53 of the disk replacement detection operation 61 of FIG.
FIG. 4 is a flowchart for explaining a specific operation by the processing circuit 53 of the temperature change detection operation 62 of FIG. 2;
FIG. 5 is a flowchart for explaining a specific operation by the processing circuit 53 of the activation failure detection operation 63 in FIG. 2;
[Explanation of symbols]
1 disc
2 Optical pickup
3 Light receiving element
20 Focusing error detection circuit
23, 24; 26; 32, 33; 35; 16 Amplifier
30 Tracking error detection circuit
37 Insertion / ejection detection means
53 Processing circuit
55 Memory means
M1-M3 memory

Claims (2)

A disk device for playing back or recording on a disk,
With an optical pickup,
A focusing error detecting means for detecting a focusing error, a focusing control means for performing focusing control of the optical pickup in response to an output of the focusing error detecting means, a tracking error detecting means for detecting a tracking error, and a tracking error detecting means. Tracking control means for performing tracking control of the optical pickup in response to the output, and data processing means for processing data recorded on the disk or data recorded on the disk in response to the output of the optical pickup. In order to adjust each characteristic, the adjustment means provided in each means ,
Detecting means for detecting an operating state of the disk device;
On the basis of the detection result of the detecting means, and an adjustment control means that perform the selection adjusting at least a portion of the adjusting means of the plurality of adjusting means,
When the detection unit detects that the disk loaded in the disk device is a two-layer disk in which two recording layers are formed,
Adjustment control means, after performing the adjustment of the adjustment means with respect to one recording layer of the disc, the adjustment of the adjustment means with respect to the other recording layers, that you run the adjustment for some adjustment means predetermined A disk device characterized. Said detecting means further exchange of disks, the temperature in the disk device, transition state to the reproduction or recording of the disc after the adjustment of the characteristics, detects at least one of the power change of the disk device the disk apparatus according to claim 1,.

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