Optical disk reproducing apparatus having a track jump control m

Details Optical disk reproducing apparatus having a track jump control m Optical disk reproducing apparatus having a track jump control m

1993-09-13

1995-03-14

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4435, 369 4425, G11B 7085

Patent

active

053982240

ABSTRACT:
An optical disk reproducing apparatus having a brake device for emitting a brake signal includes a track jump control device adapted to inhibit, during a track jump operation, the operation of the brake device until a predetermined period has elapsed starting from a time not earlier than the termination of the emission of the brake signal. Thus, the brake device does not operate until the emission of the brake signal has been terminated, so that, if there is some defect in the target track to which the pickup is to be jumped, the brake device does not malfunction. Accordingly, the drive device can reliably effect a track jump even if the target track of the track jump has some defect. Further, the brake device operates after the above-mentioned predetermined period has elapsed, so that, if a track stray happens to occur due to some defect in the target track, the effect of such a defect can be reduced.

REFERENCES:
patent: 4495608 (1985-01-01), Kumura et al.
patent: 4805163 (1989-02-01), Ohnuki
patent: 4817073 (1989-03-01), Suzuki
patent: 4926405 (1990-05-01), Hangai et al.
patent: 4930114 (1990-05-01), Tateishi
patent: 5050146 (1981-09-01), Richgels et al.

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