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US 9,906,181 B2Granted
Voice coil motor driver and camera module having the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorShin Jae Kang
Life of this patent
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Abstract
A camera module having a voice coil motor driver, including a driving controller configured to compare a reference voltage and a negative feedback voltage to output a driving control signal, and a driver configured to drive a coil of the voice coil motor according to the driving control signal.
Claims18
A voice coil motor driver, comprising:
- a driving controller comprising:
- a comparator configured to compare a reference voltage and a negative feedback voltage to output a driving control signal,
- a P metal-oxide-semiconductor field-effect transistor configured to activate or deactivate according to the driving control signal, and to allow a current generating the negative feedback voltage to flow when activated;
- and
- a driver configured to drive a coil of the voice coil motor according to the driving control signal.
2 more elements
A camera module, comprising:
- a sensor module configured to detect physical properties of a lens module and to output a detection signal indicative of the physical properties of the lens module;
- a controller configured to control movement of the lens module according to the detection signal;
- and
- a voice coil motor driver comprising a driving controller and being configured to:
- compare a reference voltage according to a control signal of the controller and a negative feedback voltage,
- generate a driving control signal, and
- drive a coil of a voice coil motor according to the driving control signal to move the lens module,
- wherein the driving controller comprises:
- a comparator configured to compare the reference voltage and the negative feedback voltage to output the driving control signal, and
- a P metal-oxide-semiconductor field-effect transistor configured to activate or deactivate according to the driving control signal, and to allow a current generating the negative feedback voltage to flow when activated.
7 more elements
Dependencies are inferred from the claim text.