Actuator capable of controlling medium voltage sensitivity and phase and optical pick-up equipment with said actuator

Abstract

Disclosed are a moving-magnet type actuator capable of controlling voltage sensitivity and phase, an optical pick-up actuator equipped with a current feedback circuit for improving voltage sensitivity, and an optical pick-up device equipped with the current feedback circuit implemented by one chip. As the voltage sensitivity of a moving-magnet type actuator is improved and its phase is compensated, the operation performance of the optical pick-up actuator can be improved.

Description

technical field [0001] The present invention relates to an actuator (actuator) capable of controlling voltage sensitivity and phase, and an optical pickup device having the same, and more particularly, to a moving magnet type actuator having a cooperatively used tilting operation for performing optical pickup , Optical Pickup Actuators for Current Feedback Circuits with Enhanced Voltage Sensitivity. Background technique [0002] Generally, an optical pickup is employed in an optical recording / reproducing apparatus. The optical pickup performs recording and / or reproducing information with respect to a recording medium, such as an optical disc, placed on a turntable in a non-contact manner while moving in a radial direction of the disc. [0003] The optical pickup includes an objective lens that forms a light spot on an optical disc by focusing light emitted from a light source, an actuator that controls the objective lens in a tracking direction, a focusing direction, and a ...

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Problems solved by technology

However, the voltage sensitivity is reduced, thereby causing a phase delay due to the reduced voltage sensitivity

For this reason, the system driver IC21 for increasing the voltage sensitivity cannot be properly used for the optical pickup

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