| 摘要 |
An apparatus for a focus pull-in and a method thereof that can promptly stabilize a focus servo operation. The apparatus includes an optical pickup having an object lens focusing a light emitted from a light source on an optical disc, a focus actuator moving the object lens along an optical axis of the object lens, and an optical detector converting the light reflected from the optical disc into electric signals; a focus error generation unit generating a focus error signal based on the electrical signals output from the optical detector; and a focus servo control unit moving the focus actuator up and down along the optical axis a specified number of times, detecting a zero cross point of at least one focus error signal generated during the moving the focus actuator down and up, and performing a focus pull-in operation at a finally detected zero cross point among the detected zero cross points. Accordingly, a focus pull-in time point can be detected more rapidly and accurately by controlling the down/up speed of the focus actuator for a focusing control.
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