Method of adjusting rotation speed of optical disc drive

Details Method of adjusting rotation speed of optical disc drive Method of adjusting rotation speed of optical disc drive

2005-12-20

2005-12-20

Hudspeth, David (Department: 2651)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S047360, C369S047390

Reexamination Certificate

active

06977878

ABSTRACT:
The present invention discloses a method of adjusting a rotation speed of an optical disc drive for a spindle motor controlled by a host to rotate and read an optical disc. First, it is determined whether the data read by the optical disc drive is in Mode 1 or Form 1 of Mode 2. If in Mode 1 or Form 1 of Mode 2, it is determined whether the frequency of read request commands output from the host is lower than a predetermined value or not. If the frequency of read request commands output from the host is lower than the predetermined value, then it is determined whether the response data output to the host is sequential reading data or not. If the three situations mentioned above are all sustained, the data read by the optical disc drive is ascertained as MP3 data. Thus, the rotation speed of the spindle motor is decreased to a lower value. If one of the three situations is not sustained, the optical disc drive rotates at its highest speed to enhance the quantity of data read between the optical disc drive and the host. Thus, the rotation speed of the optical disc drive is adjusted automatically in response to the data transmission rate.

REFERENCES:
patent: 5239533 (1993-08-01), Yoshimaru et al.
patent: 6292452 (2001-09-01), Endo et al.
patent: 6529456 (2003-03-01), Koudo et al.
patent: 6762983 (2004-07-01), Andoh

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