| 摘要 |
A module and method capable of dynamically adjusting the focus position for reading optical discs are described. The method includes: initializing the focus position; accessing data of the optical disk; determining whether an error occurred during data access; and dynamically adjusting the focus position. The module includes an optical drive unit, a detector and a control unit. The control unit includes a drive circuit, a sampler, a dynamic adjustment module and a microprocessor. The optical drive unit includes a light generator, a beam director, a focusing element, a mover and a relative mover. When the optical drive unit receives the signals reflected from the defect portion of the optical disk, the signals is passed to the detector to form an error signal, which is passed to the sampler to produce a sample signal and pass the sample signal to the dynamic adjustment module for adjusting the focus position.
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