Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2007-03-16
2010-10-19
Huber, Paul (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053420, C369S053430
Reexamination Certificate
active
07817520
ABSTRACT:
An optical disk drive capable of detecting occurrence of step-out or tooth jump in a mechanism for transferring an optical pickup. The optical pickup is transferred in a radial direction of the optical disk by means of a stepping motor. Upon receipt of a seeking operation command from a host machine, a control section drives the stepping motor by way of a controller, to thus cause the optical pickup to perform seek up to a target address. When logical contradiction has arisen in a stepper pointer showing the amount of rotation of the stepping motor, the control section determines that step-out or tooth jump has arisen. Moreover, even when a difference exists between an address indicated by the value of the stepper pointer and an actual address, step-out or tooth jump is determined to have arisen. When the step-out or tooth jump has arisen in the transfer mechanism, the rotational speed of a spindle motor or the rotational speed of the stepping motor is decreased.
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Notice of Grounds for Rejection (JP) dated Jan. 27, 2009, issued in corresponding Japanese Application No. 2006-079657.
Notice of Grounds for Rejection (JP) mailed Jun. 16, 2009, issued in Japanese Application No. 2006-079657, filed on Mar. 22, 2006.
English Language Translation of Japanese Office Action relating to Japanese Patent Application No. 2006-079657, mailed Mar. 2, 2010, 1 page.
Japanese Office Action relating to Japanese Patent Application No. 2006-079657, mailed Mar. 2, 2010, 2 pages.
Kameda Kazuhiko
Kubo Hideki
Huber Paul
Seed IP Law Group PLLC
TEAC Corporation
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