Position detecting apparatus and method for controlling the same

A position detecting apparatus comprising:

• a moving body having a lens mounted thereon;
• an input unit that receives an input command for moving the lens;
• a driver that moves the moving body in a first direction or a second direction according to the input command;
• a first sensor and a second sensor respectively mounted on the moving body;
• a displacement detection pattern unit having a plurality of reflecting bodies arranged thereon at predetermined intervals to reflect light emitted by the first sensor or the second sensor;
• and
• a controller that controls the first sensor and the second sensor to be alternately turned on to emit light, and if the light reflected by the displacement detection pattern unit is sensed by the first sensor or the second sensor, the controller detects a position of the lens based on sensing results,
• wherein the controller determines a period in which the first sensor is turned on and a period in which the second sensor is turned on based on an intersection point of a signal waveform sensed by the first sensor and a signal waveform sensed by the second sensor.