Reading method of optical disc drive for reading disc and finding if disc is placed reversely
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United States of America Patent
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May 25, 2010
Issued Date -
N/A
app pub date -
Aug 24, 2007
filing date -
Aug 25, 2006
priority date (Note) -
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Abstract
A reading method for finding if a disc is placed reversely used in an optical disc drive is provided. The optical disc drive has a spindle motor, an optical pickup head having a lens, a fine actuator and a sled actuator. Firstly, a disc is placed into the optical disc drive. Next, the spindle motor rotates the disc. After that, a laser light of the optical pickup head is shot on the disc. Next, the lens is moved such that the laser light follows a single data track. Then, a central error signal of the lens is measured continuously. Afterwards, if the central error signal increases progressively, the optical disc drive finds the disc placed reversely, and the disc is ejected from the optical disc drive.
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