Disc drive

Details Disc drive Disc drive

2007-01-26

2010-10-12

Negrón, Daniell L (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

07813232

ABSTRACT:
Since a disc vibrates in a natural mode at a predetermined rotation speed, a variation in a tilt of the disc relative to an optical head is caused. As a result, the read/write performance of a disc drive is deteriorated. The disc drive has a disc tilt database for recording a relative tilt angle of the disc in a tangential direction thereof associated with the disc natural mode and the disc rotation speed at which such tilt occurs, a circuit for detecting a disc rotation speed, and a tilt drive circuit. An objective lens is tilted so that the relative tilt angle is corrected, and thus, stable read/write performance of the disc drive is achieved.

REFERENCES:
patent: 5748587 (1998-05-01), Sim
patent: 5970035 (1999-10-01), Ohmori et al.
patent: 2004/0076091 (2004-04-01), Yonezawa
patent: 2004/0085868 (2004-05-01), Ohno et al.
patent: 2006/0072413 (2006-04-01), Raaymakers
patent: 2003-217153 (2003-07-01), None

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