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US 7,733,745 B2Granted
Method for controlling the rotation of optical disc using speed profile and holding circuit
AssigneePhilips & Lite-On Digital Solutions Corporation
InventorTheodorus Antonius Engelbertus Langenhuizen
Life of this patent
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Abstract
A motor control method for rotating an optical disc to be accessed by an optical head includes steps of: providing an increasing power to rotate a motor at increasing speed when a seeking operation of the optical head is performed; and interrupting the increasing power when a jumping operation of the optical head is performed.
Claims2
A method for controlling the rotation of an optical disc to be accessed by an optical head, comprising steps of:
- driving a motor to rotate the optical disc at a first speed when the optical head is disposed at a first position relative to the optical disc;
- determining the movement of the optical head;
- accelerating the motor to rotate the optical disc at a second speed higher than the first speed when the optical head is moving from the first position to a second position relative to the optical disc, wherein a distance between the first position and the second position is smaller than a first threshold;
- and
- maintaining the motor to rotate the optical disc at the first speed when the optical head is moving from the first position to a third position relative to the optical disc, wherein a distance between the first position and the third position is greater than a second threshold, wherein the second threshold is greater than the first threshold.
2 more elements
Dependencies are inferred from the claim text.