JPH0384908U - - Google Patents
Info
- Publication number
- JPH0384908U JPH0384908U JP14435789U JP14435789U JPH0384908U JP H0384908 U JPH0384908 U JP H0384908U JP 14435789 U JP14435789 U JP 14435789U JP 14435789 U JP14435789 U JP 14435789U JP H0384908 U JPH0384908 U JP H0384908U
- Authority
- JP
- Japan
- Prior art keywords
- year
- recording
- storage section
- power
- month data
- 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 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
図面は本考案の一実施例を示すもので、第１図
は電子回路を示すブロツク図、第２図は再生パワ
ーを一定にして一定ピツト長の信号振幅の変化と
記録パワーの変化との関係を示すグラフ、第３図
は同一の情報を再生する場合の一定ピツト長の信
号振幅の変化と再生パワーの変化との関係を示す
グラフである。
１……光情報記録媒体、２……ピツクアツプ、
１０……記憶部、１１……記録・再生パワー設定
部。
The drawings show an embodiment of the present invention. Fig. 1 is a block diagram showing an electronic circuit, and Fig. 2 shows the relationship between changes in signal amplitude and changes in recording power for a constant pit length when the reproduction power is kept constant. FIG. 3 is a graph showing the relationship between changes in signal amplitude and changes in reproduction power for a constant pit length when reproducing the same information. 1... Optical information recording medium, 2... Pickup,
10...Storage section, 11...Record/playback power setting section.
Claims (1)
が書き込まれた光情報記録媒体に対向するピツク
アツプと、前記年月データの一定ピツト長の振幅
の変化に対応する記録パワー及び再生パワーの値
を基準値として記憶する記憶部と、前記ピツクア
ツプにより読み取られた前記年月データの一定ピ
ツト長の信号振幅の変化を検出して前記記憶部の
前記基準値と比較して記録及び再生パワーを設定
する記録・再生パワー設定部とよりなることを特
徴とする光情報記録媒体の駆動装置。 A pickup facing an optical information recording medium in which year and month data such as manufacturing date and effective date are written in a recording area, and recording power and reproduction power that correspond to changes in the amplitude of a constant pit length of the year and month data. a storage section that stores the value as a reference value; and a storage section that detects a change in signal amplitude of a constant pit length of the year and month data read by the pickup and compares it with the reference value of the storage section to determine the recording and reproducing power. 1. A driving device for an optical information recording medium, comprising a recording/reproducing power setting section for setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14435789U JPH0384908U (en) | 1989-12-14 | 1989-12-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14435789U JPH0384908U (en) | 1989-12-14 | 1989-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0384908U true JPH0384908U (en) | 1991-08-28 |
Family
ID=31691059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14435789U Pending JPH0384908U (en) | 1989-12-14 | 1989-12-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0384908U (en) |
-
1989
- 1989-12-14 JP JP14435789U patent/JPH0384908U/ja active Pending
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