JPS59112464A - Revolving speed control device of optical recording device - Google Patents
Revolving speed control device of optical recording deviceInfo
- Publication number
- JPS59112464A JPS59112464A JP22005982A JP22005982A JPS59112464A JP S59112464 A JPS59112464 A JP S59112464A JP 22005982 A JP22005982 A JP 22005982A JP 22005982 A JP22005982 A JP 22005982A JP S59112464 A JPS59112464 A JP S59112464A
- Authority
- JP
- Japan
- Prior art keywords
- information recording
- recording disk
- revolving speed
- disk
- light
- 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
Links
- 230000003287 optical effect Effects 0.000 title claims description 10
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
- G11B23/42—Marks for indexing, speed-controlling, synchronising, or timing
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、光記録装置の回転数制御装置に係り、情報記
録円盤の回転数を正確に制御する回転数制御方式に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rotation speed control device for an optical recording device, and more particularly to a rotation speed control method for accurately controlling the rotation speed of an information recording disk.
(従来技術〕
従来、情報記録円盤を保持し高速回転する回転駆動部と
、該情報記録円盤に情報信号を光ビームにより凹凸ある
いは濃淡によって記録するピックアップ部と、該ピック
アップ部を該情報記録円盤の半径方向に動作させるため
の駆動部とを具備した光記録装置において、上記情報記
録円盤の所定記録部にピックアップ部から照射される光
ビームによって、スパイラルおよび同心円状に情報信号
を凹凸あるいは濃淡等で記録するためには、情報記録円
盤の回転数ケ正確に制御する必要がある。そうでないと
、情報信号の記録部が重複し、再生画像が不良となった
り、記録むらにより再生画像が歪んだりする問題が生じ
るためである。一般的に、情報記録円盤の回転数制御と
しては、情報記録円盤を高速回転させるための回転駆動
部である回転モータに周波数発生器(PG)および直流
電圧発生器(DG)等を具備し、回転モータの回転数に
比例した出力信号?得ることによって回転モータの回転
数を制御し、情報記録円盤の回転数制御を行なうもので
ある。(Prior Art) Conventionally, a rotary drive section that holds an information recording disk and rotates at high speed, a pickup section that records an information signal on the information recording disk by using a light beam with unevenness or shading, and a pickup section that is connected to the information recording disk. In an optical recording device equipped with a drive section for operating in a radial direction, a light beam irradiated from a pickup section onto a predetermined recording section of the information recording disk is used to record information signals in a spiral or concentric pattern with irregularities, shading, etc. In order to record information, it is necessary to accurately control the rotational speed of the information recording disk.If not, the information signal recording section may overlap, resulting in a defective reproduced image, or the reproduced image may be distorted due to recording unevenness. Generally, to control the rotational speed of an information recording disk, a frequency generator (PG) and a DC voltage generator are used in a rotary motor, which is a rotation drive unit for rotating the information recording disk at high speed. (DG) etc., the rotation speed of the rotary motor is controlled by obtaining an output signal proportional to the rotation speed of the rotary motor, and the rotation speed of the information recording disk is controlled.
しかしながら、この制御方式では回転モータの回転数制
御は正確に行なえても、回転モータに具備された情報記
録円盤保持部を介して情報記録円盤を制御することから
、該保持部と情報記録円盤との間に、スリップ等やガタ
による微振動がある場合、情報記録円盤の回転数が回転
モータのそれと等価でなく、情報記録円盤の回転数を正
確に制御できない問題がある。However, although this control method can accurately control the rotational speed of the rotary motor, since the information recording disk is controlled via the information recording disk holder provided in the rotary motor, the holder and the information recording disk cannot be connected to each other. If there is slight vibration due to slipping or rattling during this period, the number of rotations of the information recording disk is not equivalent to that of the rotary motor, and there is a problem that the number of rotations of the information recording disk cannot be accurately controlled.
また、1回転に約500個正確なパルスを発生するよう
な周波数発生器(FG)はコスト高となるため、入力信
号の水平同期信号を直接基準信号として用いる構成は困
難であった。Further, since a frequency generator (FG) that generates about 500 accurate pulses per revolution is expensive, it has been difficult to use a horizontal synchronization signal as an input signal directly as a reference signal.
本発明の目的は、上記した従来技術の欠点を解決し、情
報記録円盤の回転数を正確に制御できる光記録装置の回
転数制御方式を提供するものである。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a rotational speed control system for an optical recording device that can accurately control the rotational speed of an information recording disk.
本発明は、情報記録円盤の回転数制御を、情報記録円盤
の回転数によって得られる出力信号と、所定回転数に対
応する基準信号とを比較することによって回転モータ馨
制御して行なうもので、情報記録円盤の1部に全円周に
わたって等間隔なスリット部を設け、このスリットを非
接触方式で検出することにより情報記録円盤の回転数を
検出し回転数制御することを特徴とする。The present invention controls the rotational speed of the information recording disk by controlling the rotational motor by comparing an output signal obtained by the rotational speed of the information recording disk with a reference signal corresponding to a predetermined rotational speed. The present invention is characterized in that slits are provided in a part of the information recording disk at equal intervals over the entire circumference, and by detecting the slits in a non-contact manner, the rotational speed of the information recording disk is detected and the rotational speed is controlled.
第1図は本発明の光記録装置の回転数制御装置の一実施
例を示すシステムブロック図である。FIG. 1 is a system block diagram showing an embodiment of a rotation speed control device for an optical recording apparatus according to the present invention.
第2図は第1図における回転数検出部の構成斜視図であ
る。FIG. 2 is a perspective view of the configuration of the rotation speed detecting section in FIG. 1.
図において、1は情報記録円盤5oの保持部2および保
持部2を介して情報記録円盤5oを高速回転する回転モ
ータ6により構成された回転鋸1部、6はピックアップ
部4を具備しアーム駆・ 6 ・
動部10によりガイド部5を介して情報記録円盤50の
半径方向に動作可能なアーム、20は光照射器21およ
び光検出器22を保持するホルダ、30は増巾器31.
微分回路32.モノマルチ33.比較回路34および基
準信号発生器35により構成された回転数制御回路部、
51は情報記録円盤50の記録部、52は情報記録円盤
50の記録部51以外の1部全円周にわたって等間隔に
構成されたスリット部である。In the figure, reference numeral 1 denotes a rotary saw 1 which is composed of a holding part 2 of the information recording disk 5o and a rotary motor 6 that rotates the information recording disk 5o at high speed via the holding part 2; 6. An arm movable in the radial direction of the information recording disk 50 by the moving part 10 via the guide part 5; 20 is a holder that holds the light irradiator 21 and the photodetector 22; 30 is an amplification device 31.
Differential circuit 32. Monomulti 33. a rotation speed control circuit section composed of a comparison circuit 34 and a reference signal generator 35;
Reference numeral 51 indicates a recording section of the information recording disk 50, and 52 indicates a slit section that is arranged at equal intervals over the entire circumference of a portion of the information recording disk 50 other than the recording section 51.
次に実施例の動作について説明する。Next, the operation of the embodiment will be explained.
情報記録円盤50は、保持部21Cより保持され回転モ
ータ3により構成された回転駆動部1によって高速回転
を行い、情報記録円盤50の記録部51に、アーム6に
具備されたピックアップ部4より光ビームを照射するこ
とで情報信号の記録を行なうものである。さらに、ピッ
クアップ部4は、アーム駆動部10の動作によりガイド
部5を介して動作可能なアーム乙に保持されていること
から、情報記録円盤50の半径方向に動作し、所定の記
録を記録部51内に記録することが、 4 。The information recording disk 50 is held by a holding section 21C and rotated at high speed by a rotation drive section 1 constituted by a rotation motor 3. Information signals are recorded by irradiating a beam. Furthermore, since the pickup section 4 is held by the arm A which can be moved via the guide section 5 by the operation of the arm drive section 10, it moves in the radial direction of the information recording disk 50 and records a predetermined record on the recording section. 51 to be recorded within 4.
できる。can.
ここで、情報記録円盤500回転数制御は次の様に行な
われる。Here, the information recording disk 500 rotation speed control is performed as follows.
情報記録円盤50の1回転において構成されたスリット
の数が光検出器22に入力されることによる、すなわち
、情報記録円盤50に設けられたスリット部52のスリ
ット構成は、等間隔で互いに光を透過する部分と不透過
部分(反射する部分)とにより構成されているため、光
照射器21(例えば発光ダイオード等)によって光をス
リット部52に照射することにより、光を透過する部分
では光検出器22に光が入射され、光の不透過部分では
光が反射することから、光検出器としては略サイン波の
検出信号を得るものである。The number of slits formed in one rotation of the information recording disk 50 is input to the photodetector 22, that is, the slit configuration of the slit portion 52 provided in the information recording disk 50 is such that light is emitted from each other at equal intervals. Since it is composed of a transmitting part and a non-transparent part (reflecting part), by irradiating the slit part 52 with light using the light irradiator 21 (e.g., a light emitting diode), the part that transmits light can be used for photodetection. Light is incident on the detector 22, and since the light is reflected at the non-transparent portion, the photodetector obtains a substantially sine wave detection signal.
そこで、光検出器22の検出信号を回転数制御回路部3
0に供給することにより、回転数制御回路30の増巾器
31で増巾され、さらに微分回路32゜モノマルチ33
を介してパルス信号に形成され、比較回路34へ入力さ
れることになる。そこで、基準信号発生器35では、情
報記録円盤50の所定回転数(例えば毎分1800およ
び3600回転等)と情報記録円盤50のスリット部5
2のスリット数より得られる基準信号(例えば、情報記
録円盤50が毎分1800回転としてスリット数ヲ52
5個とすれば、15.75KHz、 1パルス65.
5ttsec )を形成し、同様に比較回路34へ入力
し、情報記録円盤50のスリット部52からの検出信号
と比較し、その差がゼロとなるように回転モータ3を駆
動し、情報記録円盤50の回転数を正確に制御するもの
である。Therefore, the detection signal of the photodetector 22 is transmitted to the rotation speed control circuit section 3.
0, it is amplified by the amplifier 31 of the rotation speed control circuit 30, and is further amplified by the differential circuit 32 and the monomulti 33.
The pulse signal is formed into a pulse signal and is input to the comparator circuit 34. Therefore, in the reference signal generator 35, the predetermined rotational speed of the information recording disk 50 (for example, 1800 and 3600 rotations per minute, etc.) and the slit portion 5 of the information recording disk 50 are determined.
A reference signal obtained from a number of slits of 2 (for example, assuming that the information recording disk 50 rotates at 1800 revolutions per minute, the number of slits is 52)
If there are 5, 15.75KHz, 1 pulse 65.
5ttsec), input it to the comparison circuit 34 in the same way, and compare it with the detection signal from the slit section 52 of the information recording disk 50. The rotary motor 3 is driven so that the difference becomes zero, and the information recording disk 50 The rotation speed of the engine is precisely controlled.
ここで、情報記録円盤50のスリット部52の構成とし
ては、情報信号、例えばNTSC方式テレビジョン信号
の場合水平同期信号数525本(但し、1回転1フレー
ム記録の場合)と等価とすれば、記録映像信号の水平同
期信号の精度で回転数制御が可能となり、さらに基準信
号発生器35に該水平同期信号を入力し、基準信号とす
ることで、新たに基準信号を形成する回路系も不要にな
る。Here, the configuration of the slit section 52 of the information recording disk 50 is equivalent to 525 horizontal synchronizing signals in the case of an information signal, for example, an NTSC television signal (however, in the case of recording one frame per rotation), The rotation speed can be controlled with the accuracy of the horizontal synchronization signal of the recorded video signal, and by inputting the horizontal synchronization signal to the reference signal generator 35 and using it as a reference signal, there is no need for a new circuit system to form a reference signal. become.
なお、本実施例では、透過光を検出して行なったが、ス
リット部52からの反射光乞検出する方式においても同
様の回転数制御が可能となる。In this embodiment, the transmitted light is detected, but the same rotational speed control is also possible by detecting the reflected light from the slit portion 52.
以上述べたように本発明の光記録装置の回転数制御装置
においては、情報記録円盤の1部全円周に等間隔なスリ
ット部を備え、このスリット部と非接触方式とによる回
転数検出手段とによって、情報記録円盤の回転数を検出
し、情報記録円盤の所定回転数に対する基準信号と比較
して回転モータを制御することにより、常に情報記録円
盤を所定回転数に正確に制御することができ、従来、回
転モータに回転数制御をかげて回転モータを正確に制御
していたが、回転モータの保持部に保持されて回転する
情報記録円盤が、保持部とのスリップあるいはガタ等に
よる微振動で牛しる情報記録円盤の回転むらに対しては
制御不能であることによって生じる情報信号記録の不良
等を解決でき、良好な情報記録が可能な光記録装置を提
供できる。As described above, in the rotational speed control device for an optical recording device according to the present invention, one part of the information recording disk is provided with slits at equal intervals around the entire circumference, and a rotational speed detection means using the slits and a non-contact method is provided. By detecting the rotational speed of the information recording disk and comparing it with a reference signal for a predetermined rotational speed of the information recording disk and controlling the rotating motor, it is possible to always accurately control the information recording disk to a predetermined rotational speed. Conventionally, the rotary motor was accurately controlled by controlling the rotation speed of the rotary motor, but the information recording disk, which is held in the holder of the rotary motor and rotates, may slip or play slightly with the holder. It is possible to solve defects in information signal recording caused by uncontrollability of uneven rotation of the information recording disk caused by vibrations, and to provide an optical recording device capable of good information recording.
第1図は本発明の一実施例の光記録装置の回転数制御装
置を示すシステムブロック図、第2磨は第1図における
回転数検出部の構成斜視図である。
21・・・光照射器、
22・・・光検出器、
52・・・スリット部、
60・・・回転数制御回路部、
1・・・回転駆動部、
50・・・回転記録円盤。
、 8 。
第1図
べl
第2 図FIG. 1 is a system block diagram showing a rotation speed control device for an optical recording apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view of the configuration of a rotation speed detection section in FIG. 1. 21... Light irradiator, 22... Photodetector, 52... Slit section, 60... Rotation speed control circuit section, 1... Rotation drive section, 50... Rotation recording disk. , 8. Figure 1 Figure 2
Claims (1)
報記録円盤を光ビームにより凹凸あるいは濃淡によって
記録するピックアップ部と、該ピックアップ部を該情報
記録円盤の半径方向に動作させるための駆動部とを具備
した光記録装置において、該情報記録円盤の1部に全円
周にわたって等間隔に配置したスリットと、該スリット
に光を照射する光照射器と、該スリットと該光照射器に
よって生ずる反射光または透過光を受光する光検出器と
を備え、該光検出器からの検出信号と該情報記録円盤の
所定回転数に対する基準信号とを比較し、該情報記録円
盤を所定回転数とすべく回転駆動部を制御してなること
を特徴とする光記録装置の回転数制御装置。A rotary drive unit that holds an information recording disk and rotates at high speed; a pickup unit that records unevenness or shading on the information recording disk with a light beam; and a drive unit that moves the pickup unit in the radial direction of the information recording disk. an optical recording device comprising: slits arranged at equal intervals over the entire circumference in a part of the information recording disk; a light irradiator that irradiates the slits with light; a photodetector that receives reflected light or transmitted light; a detection signal from the photodetector is compared with a reference signal for a predetermined rotational speed of the information recording disk, and the information recording disk is set at a predetermined rotational speed. 1. A rotation speed control device for an optical recording device, characterized in that the device controls a rotational drive unit as much as possible.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22005982A JPS59112464A (en) | 1982-12-17 | 1982-12-17 | Revolving speed control device of optical recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22005982A JPS59112464A (en) | 1982-12-17 | 1982-12-17 | Revolving speed control device of optical recording device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59112464A true JPS59112464A (en) | 1984-06-28 |
Family
ID=16745289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22005982A Pending JPS59112464A (en) | 1982-12-17 | 1982-12-17 | Revolving speed control device of optical recording device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59112464A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4882720A (en) * | 1986-03-05 | 1989-11-21 | Mitsubishi Denki Kabushiki Kaisha | Memory device including a rotating disk and means for detecting change in frictional resistance between the disk and a read/record head |
US5083301A (en) * | 1988-05-13 | 1992-01-21 | Sharp Kabushiki Kaisha | Optical card recording and reproducing device |
-
1982
- 1982-12-17 JP JP22005982A patent/JPS59112464A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4882720A (en) * | 1986-03-05 | 1989-11-21 | Mitsubishi Denki Kabushiki Kaisha | Memory device including a rotating disk and means for detecting change in frictional resistance between the disk and a read/record head |
US5083301A (en) * | 1988-05-13 | 1992-01-21 | Sharp Kabushiki Kaisha | Optical card recording and reproducing device |
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