Method for controlling spindle motor by time length for...

Details Method for controlling spindle motor by time length for... Method for controlling spindle motor by time length for...

2007-08-21

2007-08-21

Duda, Rina (Department: 2837)

Electricity: motive power systems

Positional servo systems

C318S565000, C360S075000, C360S078040

Reexamination Certificate

active

11420633

ABSTRACT:
A method of use a defect measure to control spindle motor is described. A system gets the defect situation from a CD by referring a maximum time of pass through the defect and a total time of pass through the defect. According the maximum scrape and the scrape of whole CD, the system adjusts a speed of the spindle motor for reducing a bad effect upon the system. When pass through the defect, the system reduce the speed of the spindle motor for saving power consumption.

REFERENCES:
patent: 5737762 (1998-04-01), Hattori
patent: 6239935 (2001-05-01), Shrinkle
patent: 6661751 (2003-12-01), Asakura
patent: 2003/0156516 (2003-08-01), Tanaka

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