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US 6,674,701 B2Granted
Apparatus for readout of optical recording medium
AssigneeSharp Kabushiki Kaisha
InventorsTetsuya Okumura, Shigemi Maeda
Life of this patent
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AssigneeSharp Kabushiki Kaisha
InventorsTetsuya Okumura, Shigemi Maeda
Estimating the term…
By adding a predetermined offset value which is not less than 0 to, to the value of a readout power at a time when readout power control operations are temporarily suspended, i.e., at a time when an optical head initiates a seek operation, with an adder, this latter value being stored in a readout power value storage circuit, because an optical recording medium readout apparatus makes it possible to cause the value of the readout power at the time when readout power control operations resume, i.e., at the time of completion of the seek operation performed by the optical head, to avoid abnormal power domains in which change in amplitude ratio with respect to change in readout power is not monotonically decreasing, it is made possible to avoid abnormal conditions such as occurrence of lag in response during readout power control operations.
An optical recording medium readout apparatus comprising:
Dependencies are inferred from the claim text.