US Patent 6965548 Method of unbalanced disc detection

Patent 6965548 was granted and assigned to AOpen on November, 2005 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

AOpen

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

69655480

Patent Inventor Names

Yung-Chien Chen0

Date of Patent

November 15, 2005

Patent Application Number

101961500

Date Filed

July 15, 2002

Patent Primary Examiner

‌

Muhammad Edun

Patent abstract

A method of unbalanced disc detection in a slim type optical drive. In the method of the present invention, the slim type optical drive obtains a first tracking count per round of the disc at a first rotation speed to obtain a first runout. Then, the optical drive obtains a second tracking count per round of the disc at a second rotation speed to obtain a second runout. Finally, deviation of the disc is assessed according to the first runout and the second runout, so that the disc can be determined to be a gravitationally eccentric disc or not.