Method for preventing contact between a pickup head and an optical disc
OwnerJen-Yu Hsu, Hsiang-Yi Fu +3inventors
InventorsJen-Yu Hsu, Hsiang-Yi Fu, Tun-Chieh Lee, Fu-Hsiang Chen, Yao-Chou Tsai
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Abstract
A method for preventing contact between a pickup head and an optical disc. First, a voltage is provided to the pickup head, thereby repositioning the pickup head closer to the optical disc from an initial position to a biased position. A track-seeking motion is executed to move the pickup head to a predetermined information track. The pickup head starts a vibration in the direction away from the disc when a focus error occurs during the track-seeking motion.
Claims7
A method for preventing contact between a pickup head and an optical disc, comprising:
- providing a voltage to the pickup head, thereby repositioning the pickup head closer to the optical disc from an initial position to a biased position;
- and
- executing a track-seeking motion to move the pickup head to a predetermined information track;
- wherein the pickup head starting a vibration from the biased position toward the direction away from the 11 disc when a focus error occurs during the track-seeking motion.
A method for preventing contact between a pickup head and an optical disc, comprising:
- providing a voltage to the pickup head such that the pickup head is repositioned a predetermined distance closer to the optical disc;
- executing a track-seeking motion to move the pickup head to a predetermined track;
- and
- discontinuing the track-seeking motion when a focus error occurs.
Dependencies are inferred from the claim text.