Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Po-Chao Huang0
Date of Patent
April 5, 2011
0Patent Application Number
120689420
Date Filed
February 13, 2008
0Patent Primary Examiner
Patent abstract
A method for determining runout disc is disclosed. The method comprises: focusing on a focal point on a disc; driving the disc to spin the disc; generating a crossover signal according to a track of the disc crossing the focal point; and determining that the disc is a runout disc when the frequency of the crossover signal exceeds a pre-determine value.
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