Optical anti-jitter voice coil motor

Abstract

The invention discloses an optical anti-jitter voice coil motor, comprising a shell and a base connected with the shell, wherein an upper gasket, an upper shrapnel, a lower gasket and a lower shrapnel are arranged in the shell; a center through hole is formed in the upper end face of the shell; and a lens carrier is arranged in the center through hole. The optical anti-jitter voice coil motor is characterized in that the top of the lens carrier is connected with the upper gasket, and four corners of the upper gasket are connected with the lower gasket via suspension wires; the lower gasket is connected with the bottom of a coil frame, and the top of the coil frame is connected with the inner ring of the upper shrapnel; the outer frame of the upper shrapnel is connected with the top of a magnet frame; a first coil is arranged on the side wall of the coil frame, and a second coil is arranged on the side wall of the lens carrier; the first coil corresponds to a first magnet, the second coil corresponds to a second magnet, one of the first magnet and the second magnet is a unipolar magnet, while the other one is a bipolar magnet. The optical anti-jitter voice coil motor has the advantages of simple structure, low production cost, power saving and multi-degree-of-freedom jitter prevention.

Description

technical field [0001] The invention relates to the technical field of a lens driving device with an autofocus function; in particular, it relates to a voice coil motor with an optical anti-shake function. Background technique [0002] With the continuous development and advancement of technology, consumers have higher and higher requirements for the imaging quality of portable digital products (such as smart phones and tablet computers). At present, the optical image stabilization (OIS) function has been commonly used in digital cameras; however, the optical image stabilization function has not been popularized in camera modules of portable digital products. Optical image stabilization is a built-in gyroscope in the lens. The gyroscope detects a small movement and sends a signal to the microprocessor to immediately calculate the displacement to be compensated, and then compensate according to the direction and displacement of the lens. The position and angle of the lens gr...

AI Technical Summary

Problems solved by technology

When the shaft-shifting optical anti-shake voice coil motor is taking pictures, the optical axis of the lens will be tilted, which is not perpendicular to the chip. Once tilted, it will affect the edge imaging effect; the structure of the translational optical anti-shake voice coil motor is complex and the cost of materials is high. , high cost, low yield rate, high power consumption, a large number of PIN pins using Hall chips, and the OIS function will fail under strong magnetic field conditions

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