JPS57120269A - Disk recording and reproducing device - Google Patents
Disk recording and reproducing deviceInfo
- Publication number
- JPS57120269A JPS57120269A JP56192314A JP19231481A JPS57120269A JP S57120269 A JPS57120269 A JP S57120269A JP 56192314 A JP56192314 A JP 56192314A JP 19231481 A JP19231481 A JP 19231481A JP S57120269 A JPS57120269 A JP S57120269A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- phase
- constant
- detection
- reference period
- 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.)
- Granted
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
- Rotational Drive Of Disk (AREA)
Abstract
PURPOSE: To achieve recording and reproduction while keeping constant in phase relation with a reference period signal by controlling a motor so that a detection signal showing the constant-angle position of a disk and the reference period signal are in phase, by making a phase comparision between both the signals.
CONSTITUTION: A detected part for the detection of a constant-angle position provided on a disk 11 is detected by a turning-angle detector 17, and a phase comparison control circuit 18 compares the phase of said detection signal with that of a reference period signal from a reference-period-signal generator 19 to exercise constant-speed control over a motor 15 so that both the signals are in phase. Further, a turning-angle detection signal is inputted to a beam displacement control circuit 31 to generate a track switching signal with a mode setting signal inputted from an instruction signal circuit 33. This signal controls a rotary mirror 28.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56192314A JPS60837B2 (en) | 1981-11-30 | 1981-11-30 | Disc recording or playback device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56192314A JPS60837B2 (en) | 1981-11-30 | 1981-11-30 | Disc recording or playback device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5431476A Division JPS52137919A (en) | 1976-05-14 | 1976-05-14 | Disk recorder reproducer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57120269A true JPS57120269A (en) | 1982-07-27 |
JPS60837B2 JPS60837B2 (en) | 1985-01-10 |
Family
ID=16289214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56192314A Expired JPS60837B2 (en) | 1981-11-30 | 1981-11-30 | Disc recording or playback device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60837B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6319981A (en) * | 1986-07-14 | 1988-01-27 | Teac Co | video disc playback device |
WO1995028704A1 (en) * | 1994-04-18 | 1995-10-26 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for preventing illegal copying and illegal installation of information on optical recording medium |
US5805551A (en) * | 1994-04-18 | 1998-09-08 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium |
US5881038A (en) * | 1994-04-18 | 1999-03-09 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium |
-
1981
- 1981-11-30 JP JP56192314A patent/JPS60837B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6319981A (en) * | 1986-07-14 | 1988-01-27 | Teac Co | video disc playback device |
WO1995028704A1 (en) * | 1994-04-18 | 1995-10-26 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for preventing illegal copying and illegal installation of information on optical recording medium |
US5805551A (en) * | 1994-04-18 | 1998-09-08 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium |
US5881038A (en) * | 1994-04-18 | 1999-03-09 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPS60837B2 (en) | 1985-01-10 |
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