Patent ID: 7480453

Claim:
A camera module, comprising: a lens holder; a lens module including a lens barrel and at least one lens received in the lens barrel, the lens barrel being axially movably received in the lens holder for transmitting light from outside the camera module therethrough; a position detecting mechanism comprising: a conductive strip disposed on an outer periphery of the lens barrel along an axial direction thereof; a plurality of conductive terminals arranged on an inner periphery of the lens holder parallel to each other for separately connecting with the conductive strip; a plurality of electrical sources, each of the electrical sources comprising a cathode and an anode, the cathode being electrically connected to one corresponding conductive terminal; and a processor electrically connected with the anode of the electrical source for detecting a potential difference between each conductive terminal and an input terminal of the processor associated with movement of the lens module; and an image pick-up module being arranged so as to receive the light from the lens module.