Actuator of camera module
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsYoun Joong Lee, Chang Seok Lee, Koon Shik Cho, Ho Kwon Yoon
Life of this patent
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Abstract
An actuator of a camera module includes a driving coil disposed to face a detection target; a driving circuit including a plurality of transistors connected to the driving coil; and a processor configured to provide a respective gate control signal to a gate of each of the plurality of transistors, and detect a displacement of the detection target based on a component of an oscillation signal generated in a driving signal applied to the driving coil in response to an operation of any one of the plurality of transistors being switched by the respective gate control signal.
Claims22
An actuator of a camera module, the actuator comprising:
- a driving coil disposed to face a detection target;
- a driving circuit comprising a plurality of transistors connected to the driving coil;
- and
- a processor configured to:
- provide a respective gate control signal to a gate of each of the plurality of transistors, and
- detect a displacement of the detection target based on a component of an oscillation signal generated in a driving signal applied to the driving coil in response to an operation of any one of the plurality of transistors being switched by the respective gate control signal.
An actuator of a camera module, the actuator comprising:
- a lens barrel;
- a driving coil configured to provide a driving force to the lens barrel;
- a driver configured to provide a driving signal to the driving coil;
- and
- a processor configured to detect a displacement of the lens barrel based on a component of an oscillation signal generated in the driving signal in response to a change in a level of the driving signal provided to the driving coil.
A processor-implemented method of controlling an actuator of a camera module, the processor-implemented method comprising:
- providing a respective gate control signal to a gate of each of a plurality of transistors connected to a driving coil facing a detection target to periodically switch the plurality of transistors on and off to apply a driving signal to the driving coil to cause the driving coil to apply a driving force to the detection target to move the detection target;
- and
- detecting a displacement of the detection target based on an oscillation signal generated in the driving signal by the switching of the plurality of transistors, the oscillation signal having a frequency that varies as the detection target moves.
Dependencies are inferred from the claim text.