Moving-coil closed-loop auto-focusing camera module with low magnetic interference
A moving-coil closed-loop auto-focusing module with low magnetic interference includes an upper cover, a base frame, a lens module, an elastic module, at least one coil, at least one pair of two opposing driving magnets, an external circuit and at least one sensor magnet. The coil surrounds the lens module. The two driving magnets are located individually at respective lateral sides of the base frame in correspondence with the coil. The external circuit located under the base frame includes an image-sensing element and at least one sensor. The sensor magnet is mounted peripherally to the lens module, and has magnetic lines parallel to the optical image-capturing axis, such that a magnetizing surface of the sensor magnet can face downward to align the sensor on the external circuit. Thereupon, the lens module can be controlled to displace along an optical image-capturing axis in a closed-loop manner.
PowerGate Optical Inc.
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Ying Chun Hsieh Jen Te Pao Yu Chia Shih Chan
Huang Chuang Ho Chen Wen