FI921364A - RIKTNINGSLOGIK. - Google Patents
RIKTNINGSLOGIK. Download PDFInfo
- Publication number
- FI921364A FI921364A FI921364A FI921364A FI921364A FI 921364 A FI921364 A FI 921364A FI 921364 A FI921364 A FI 921364A FI 921364 A FI921364 A FI 921364A FI 921364 A FI921364 A FI 921364A
- Authority
- FI
- Finland
- Prior art keywords
- disc
- tracks
- light beam
- disc players
- travelling
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
Landscapes
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Cosmetics (AREA)
- Radiation-Therapy Devices (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Image Analysis (AREA)
- Image Processing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Moving Of Head For Track Selection And Changing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
A direction-determination logic is used in compact-disc players to establish in which direction the scanner is travelling across the tracks of the disc after either an intentional jump or an unintentional one caused by a knock, for instance. In order to determine in which direction the scanning light beam is travelling across the disc tracks, the phase difference between a track error signal (TE) and the envelope of the HF signal (HF) which generates the scanning light beam is only evaluated if the speed with which the light beam travels across the tracks is below a given value. The logic of the invention for the determination of the direction of motion of the scanner can be used in compact-disc players, video-disc players, DRAW-disc players and magneto-optical instruments.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3932832A DE3932832A1 (en) | 1989-09-30 | 1989-09-30 | DIRECTIONAL LOGIC |
| PCT/EP1990/001594 WO1991005338A1 (en) | 1989-09-30 | 1990-09-20 | Direction-determination logic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FI921364A0 FI921364A0 (en) | 1992-03-27 |
| FI921364A true FI921364A (en) | 1992-03-27 |
Family
ID=6390659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI921364A FI921364A (en) | 1989-09-30 | 1992-03-27 | RIKTNINGSLOGIK. |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP0494889B1 (en) |
| KR (1) | KR0178008B1 (en) |
| CN (1) | CN1028812C (en) |
| AT (1) | ATE115317T1 (en) |
| AU (1) | AU6416490A (en) |
| DD (1) | DD298311A5 (en) |
| DE (2) | DE3932832A1 (en) |
| ES (1) | ES2064764T3 (en) |
| FI (1) | FI921364A (en) |
| HK (1) | HK15696A (en) |
| HU (1) | HUT61117A (en) |
| MY (1) | MY107308A (en) |
| TR (1) | TR24688A (en) |
| WO (1) | WO1991005338A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10062079A1 (en) | 2000-12-13 | 2002-06-27 | Thomson Brandt Gmbh | Track counting method and corresponding device for reading and / or writing to an optical recording medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4855977A (en) * | 1987-07-27 | 1989-08-08 | Laser Magnetic Storage International Company | Track seeking apparatus and method using sampled information |
-
1989
- 1989-09-30 DE DE3932832A patent/DE3932832A1/en not_active Withdrawn
-
1990
- 1990-09-20 WO PCT/EP1990/001594 patent/WO1991005338A1/en active IP Right Grant
- 1990-09-20 KR KR1019920700710A patent/KR0178008B1/en not_active IP Right Cessation
- 1990-09-20 DE DE59007955T patent/DE59007955D1/en not_active Expired - Lifetime
- 1990-09-20 AU AU64164/90A patent/AU6416490A/en not_active Abandoned
- 1990-09-20 HU HU92994A patent/HUT61117A/en unknown
- 1990-09-20 ES ES90914164T patent/ES2064764T3/en not_active Expired - Lifetime
- 1990-09-20 AT AT90914164T patent/ATE115317T1/en not_active IP Right Cessation
- 1990-09-20 EP EP90914164A patent/EP0494889B1/en not_active Expired - Lifetime
- 1990-09-26 CN CN90107992A patent/CN1028812C/en not_active Expired - Lifetime
- 1990-09-28 DD DD90344295A patent/DD298311A5/en not_active IP Right Cessation
- 1990-09-28 MY MYPI90001678A patent/MY107308A/en unknown
- 1990-10-05 TR TR90/0917A patent/TR24688A/en unknown
-
1992
- 1992-03-27 FI FI921364A patent/FI921364A/en not_active Application Discontinuation
-
1996
- 1996-01-25 HK HK15696A patent/HK15696A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DD298311A5 (en) | 1992-02-13 |
| CN1050614A (en) | 1991-04-10 |
| EP0494889A1 (en) | 1992-07-22 |
| EP0494889B1 (en) | 1994-12-07 |
| MY107308A (en) | 1995-11-30 |
| WO1991005338A1 (en) | 1991-04-18 |
| TR24688A (en) | 1992-03-01 |
| DE3932832A1 (en) | 1991-04-11 |
| KR0178008B1 (en) | 1999-04-15 |
| AU6416490A (en) | 1991-04-28 |
| FI921364A0 (en) | 1992-03-27 |
| ATE115317T1 (en) | 1994-12-15 |
| KR920704288A (en) | 1992-12-19 |
| CN1028812C (en) | 1995-06-07 |
| HUT61117A (en) | 1992-11-30 |
| HU9200994D0 (en) | 1992-06-29 |
| DE59007955D1 (en) | 1995-01-19 |
| ES2064764T3 (en) | 1995-02-01 |
| HK15696A (en) | 1996-02-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD | Application lapsed |