Optical disk device capable of performing high speed seeking time
US6834028B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2002 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Mar 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08517
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides an optical disk device that reduces a track lead-in time associated with a seek time. A switching means 50 includes a multiplier A 11 for multiplying an output of a speed control means 5 by &agr; and a multiplier B 12 for multiplying an output of a position control means 6 by (1−&agr;), and an adder 13 for adding an output of the multiplier A 11 and an output of the multiplier B 12 to output a result of the addition as control input to an actuator driving means 8. At the time of movement of an optical pickup 3 toward a target track, the multiplier factor &agr; for the multipliers A 11 and B 12 is set at 0, thereby performing control of the actuator driving means 8 by means of the position control means 6. After the optical pickup 3 reaches the vicinity of the target track, the multiplier factor &agr; is set to be gradually increased from 0 to 1 at a predetermined ratio, whereby the speed control means 5 is gradually made operate to make the lens 2 follow the eccentricity of the optical disk 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.