Camera module with actuator and lens module position detection

An actuator for a camera module, the actuator comprising:

• two or more detectable elements, the detectable elements being respectively disposed on a first surface of a lens barrel and a second surface of the lens barrel;
• an oscillating element comprising a first oscillation circuit unit that comprises two or more oscillation circuits disposed to face the first surface of the lens barrel, and a second oscillation circuit unit that comprises two or more oscillation circuits disposed to face the second surface of the lens barrel;
• and
• a determining device configured to calculate a position of the lens barrel in response to frequencies of a plurality of oscillation signals output from the oscillating element, and configured to determine a temperature of the lens barrel based on the plurality of oscillation signals,
• wherein each of the two or more oscillation circuits of the first oscillation circuit unit and the two or more oscillation circuits of the second oscillation circuit unit comprises a coil and a capacitor, and the coil of each of the two or more oscillation circuits of the first oscillation circuit unit and the two or more oscillation circuits of the second oscillation circuit unit are configured to receive a driving signal.

A processor-implemented actuation method comprising:

• detecting two or more elements respectively disposed on a first surface of a lens barrel of a camera actuator system, and a second surface of the lens barrel;
• determining frequencies of oscillation signals of each of at least a first oscillation circuit and a second oscillation circuit disposed on the first surface of the lens barrel, and a third oscillation circuit and a fourth oscillation circuit disposed on the second surface of the lens barrel;
• calculating a position of the lens barrel in an X-axis direction and a Y-axis direction based on the determined frequencies of the oscillation signals;
• and
• determining a temperature of the lens barrel based on the oscillation signals.