Apparatus for operating optical-reflector and apparatus and method for controlling position of optical-reflector

Abstract

An apparatus for operating an optical-reflector according to an embodiment of the present disclosure includes a first carrier configured to rotate based on a first direction perpendicular to an optical axis, a second carrier having an optical-reflector for reflecting a light toward a lens and accommodated in the first carrier to rotate based on a second direction perpendicular to both the optical axis and the first direction with respect to the first carrier, a plurality of magnets provided to the second carrier at different positions, a plurality of hall sensors configured to output signals respectively corresponding to the positions of the plurality of magnets, and a position control unit configured to calculate the signals input from the plurality of hall sensors to generate a position signal that is a signal about a current position of the second carrier.

What is claimed is: 
     
         1 . An apparatus for operating an optical-reflector, the apparatus comprising:
 an optical-reflector provided at a front of a lens and reflects a light toward the lens;   a carrier to which the optical-reflector is mounted;   first and second magnets provided to the carrier at different positions;   a first hall sensor configured to output a first signal corresponding to the position of the first magnet;   a second hall sensor configured to output a second signal corresponding to the position of the second magnet;   a position control unit configured to generate a position signal that is a signal about a current position of the carrier, wherein when the first and second magnets have the same pole at surfaces facing the first and second hall sensors, the position control unit generates the position signal by doing the subtraction to the first and second signals, and when the first and second magnets have different poles at surfaces facing the first and second hall sensors, the position control unit generates the position signal by doing the addition to the first and second signals.   
     
     
         2 . The apparatus for controlling a position of an optical-reflector according to  claim 1 , further comprising:
 a driving control unit configured to control a position of the carrier using the position signal.   
     
     
         3 . The apparatus for controlling a position of an optical-reflector according to  claim 1 , wherein the first and second magnets are provided at surfaces opposite to each other based on the carrier.