JPH042316U - - Google Patents
Info
- Publication number
- JPH042316U JPH042316U JP3976890U JP3976890U JPH042316U JP H042316 U JPH042316 U JP H042316U JP 3976890 U JP3976890 U JP 3976890U JP 3976890 U JP3976890 U JP 3976890U JP H042316 U JPH042316 U JP H042316U
- Authority
- JP
- Japan
- Prior art keywords
- tracking
- laser
- writing
- error determination
- signal
- 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
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の書込可能デイスクの保護装置
の構成の一実施例を示すブロツク図である。
１……トラツキングエラー判定回路、３……信
号処理回路、４……レーザダイオード電流制限回
路、５……レーザダイオード電源供給回路、６…
…レーザダイオード。
FIG. 1 is a block diagram showing an embodiment of the structure of a writable disk protection device according to the present invention. DESCRIPTION OF SYMBOLS 1... Tracking error determination circuit, 3... Signal processing circuit, 4... Laser diode current limiting circuit, 5... Laser diode power supply circuit, 6...
...Laser diode.
Claims (1)
キングが正常に行なわれているか否かを判定する
トラツキングエラー判定回路と、 情報の書き込み及び読み出しのためのレーザ光
を発するレーザ光源の発光を制御するレーザ発光
制御部と、 デイスクへ情報を書き込む書込モードにあると
き、上記トラツキングエラー判定回路より上記ト
ラツキングが正常状態にある旨の正常トラツキン
グ信号が供給されている場合には書き込む情報に
対応して上記レーザ光源を発光させる信号を上記
レーザ発光制御部に送出し、一方、上記トラツキ
ングエラー判定回路より上記トラツキングが正常
状態より外れた旨の非正常トラツキング信号が供
給されている場合には上記レーザ発光制御部へレ
ーザ光源の発光を低減する信号を送出する信号処
理回路と、を備えたことを特徴とする書込可能デ
イスクの保護装置。[Claims for Utility Model Registration] A tracking error determination circuit that determines whether tracking is performed normally when writing and reading information, and a laser that emits laser light for writing and reading information. A laser emission control unit that controls the light emission of the light source, and when in a write mode for writing information to the disk, if a normal tracking signal indicating that the tracking is in a normal state is supplied from the tracking error determination circuit. sends a signal for causing the laser light source to emit light in accordance with the information to be written to the laser emission control section, while an abnormal tracking signal indicating that the tracking is out of the normal state is supplied from the tracking error determination circuit. A protection device for a writable disk, comprising: a signal processing circuit that sends a signal to the laser light emission control unit to reduce light emission from the laser light source when
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3976890U JPH042316U (en) | 1990-04-13 | 1990-04-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3976890U JPH042316U (en) | 1990-04-13 | 1990-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH042316U true JPH042316U (en) | 1992-01-09 |
Family
ID=31548968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3976890U Pending JPH042316U (en) | 1990-04-13 | 1990-04-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042316U (en) |
-
1990
- 1990-04-13 JP JP3976890U patent/JPH042316U/ja active Pending
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