Voice coil motor capable of realizing OIS (optical image stabilization) through pure translational motion

Abstract

The invention discloses a voice coil motor capable of realizing OIS (optical image stabilization) through pure translational motion. The voice coil motor comprises a case consisting of a lower cover and a metal magnet yoke, a lens holder arranged in the case, a plurality of magnets arranged on inner walls of the magnet yoke, a focusing coil capable of interacting with the magnets to control focusing of the lens holder, translation coils capable of interacting with the magnets to control the lens holder to move in a plane perpendicular to the lens optical axis, a fixing device and a limiting device, wherein the lens holder can move back and forth along the optical axis relative to the fixing device, and the limiting device fixes the lens holder in the plane perpendicular to the optical axis. The fixing device and the limiting device are matched, so that the translational motion of an automatic focusing part can be conducted in one plane, the deflection can be avoided, and the image stabilization effect is very ideal.

Description

technical field [0001] The present invention relates to voice coil motors used in electronic equipment accessories. Background technique [0002] With the increasing popularity of smart phones, people have higher and higher technical requirements for taking photos with smart phones, expecting that the camera effect of mobile phones can reach the level of digital cameras. The digital camera can realize the functions of optical image stabilization (OIS) and tilt-shift photography because it has a relatively complex mechanical structure to control the multi-dimensional movement of the lens, but this complex mechanical structure cannot be applied to mobile phones, because the mobile phone itself The hardware and software foundation of the limited the further development of its camera. [0003] In order to improve the camera's camera capability on the basis of the hardware and software of the mobile phone itself, it is also a topic that smartphone manufacturers have been working...

AI Technical Summary

Problems solved by technology

However, the optical image stabilization effect of the motors produced by them is not ideal. For example, when the motor performs translational movement, it will be affected by the spring plate and other forces. The plane of its translational movement cannot be completely perpendicular to the optical axis of the lens. A certain deflection angle is generated, which affects the photo effect, and the existing motor has too many pins, which is not easy to match with the mobile phone circuit and other defects.

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