Appeal No. 2007-0464
Application 09/964,874
6. A change in the operating temperature of the disk drive, either due to a change in
the ambient temperature or to operations of electrical circuits in the disk drive, causes the set
offset values and the set laser output value to deviate from the optimal.
7. Optimal offset values change in accordance with temperature.
(Specification, Page 3, Lines 15-16).
8. If offset values deviate from the appropriate values, recording and reproducing
operations of the optical disk drive may fail to perform properly. (Specification, Page 3, Lines
16-18).
9. Claims 10, 12, 24 and 26 are independent claims. Claims 10 and 12 each recites a
first temperature measurement means for measuring an internal temperature of the optical disk
drive at startup of operations, and a second temperature measurement means for measuring an
internal temperature of the optical disk drive sometime after startup of operations of the disk
drive. Claims 24 and 26 each requires a temperature sensor for sensing an internal temperature
of the optical disk drive and requires the sensor to take a measurement at startup of the disk drive
and again sometime after startup of the disk drive.
10. Claim 10 recites a setting means for setting a focus offset value and/or a tracking
offset value at startup of the optical disk drive, a determining means for determining whether the
measurement of the first and second temperature measurement means differ by more than a
predetermined level, and a resetting means for resetting the focus offset value and/or the tracking
offset value when that condition is met.
11. Claim 12 recites a setting means for setting a laser output value at startup of the
disk drive, a determining means for determining whether the measurement of the first and
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