Controlling optical pickup of optical disk drive by...

Details Controlling optical pickup of optical disk drive by... Controlling optical pickup of optical disk drive by...

2005-04-15

2008-01-15

Patel, Gautam R. (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C388S811000, C318S254100, C318S434000

Reexamination Certificate

active

07319652

ABSTRACT:
A drive current or a drive voltage is controlled corresponding to change of load by sampling the drive current or drive voltage of a motor to move an optical pickup and then detecting change of the sampling signal as change of the optical pickup when it is moved. Moreover, change of the sampling signal is obtained from a difference of the sampling signals by comparing these sampling signals at the first and second points. Comparison of these sampling signals is conducted in unit of drive pulse.

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Japanese Office Action issued in Japanese Patent Application No. JP 2002-037013, dated Feb. 20, 2007.

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