Actuator for controlling voltage sensitivity and phase and optical pick-up device equipped with the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsHo-Seop Jeong, Yong-Han Yoon
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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.
Claims12
An optical pick-up device, comprising:
- a system driving integrated circuit (IC) for providing a tracking control signal, a focusing control signal and a tilting control signal to drive at least one actuator;
- the actuator driven in response to a sum signal and a difference signal, associated with the focusing control signal and the tilting control signal, and the tracking control signal;
- and
- a current feedback unit for outputting, to corresponding coils of the actuators, voltages corresponding to the sum and difference signals generated by combining the focusing control signal and the tilting control signal and the tracking control signal, sensing currents applied to the actuator coils, and applying feedback signals to the actuator to control voltage sensitivity and phase of the actuator.
A tilt actuator being driven in response to a sum signal and a difference signal, associated with a focusing control signal and a tilting control signal, and a tracking control signal, comprising:
- a current feedback unit for outputting, to corresponding coils of the actuator, voltages corresponding to the sum and difference signals generated by combining the focusing control signal and the tilting control signal and the tracking control signal, sensing currents applied to the actuator coils, and generating feedback signals to control voltage sensitivity and phase of the actuator.
Dependencies are inferred from the claim text.