Liquid lens focusing and anti-shake device, camera module and electronic equipment

Abstract

The invention discloses a liquid lens focusing device, a camera module and electronic equipment. The liquid lens focusing and anti-shake device comprises a liquid lens a SMA actuator which comprises an SMA wire and two actuating bodies, wherein the SMA wire can be electrified to contract, each actuating body comprises a connecting rod, a supporting part and a first elastic arm, one end of the connecting rod is connected with the SMA wire, one end of the connecting rod is elastically connected with the supporting part, and the first elastic arm is arranged between the connecting rod and the supporting part and can be elastically bent; and a driven part, wherein one end of the connecting rod is hinged to the driven part, an adjusting ring is arranged on the driven part, and the SMA wire canshrink to drive the adjusting ring to move so as to make contact with and extrude the liquid lens. The displacement of the adjusting ring can be greater than the shrinkage of the SMA wire, a large focusing stroke can be realized under the condition that the size of the actuator is small, and miniaturization is facilitated. Meanwhile, the two connecting rods in the SMA actuator are coaxially hingedso that the inclination of the adjusting ring is improved and the imaging quality is improved.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a liquid lens focusing and anti-shake device, a camera module and electronic equipment. Background technique [0002] The liquid lens usually includes a ring-shaped frame, a light-transmitting cover plate and a light-transmitting film that respectively close the two ends of the ring-shaped frame. The shape of the liquid, and then change the curvature and focal length of the liquid lens. [0003] A camera module with a liquid lens generally also includes an adjustment component and an actuator. The adjustment component is arranged on the side of the liquid lens with a light-transmitting film, and the actuator is used to drive the movement of the adjustment component so that its ring contacts the light-transmitting film. Squeeze or separate. The actuator of the camera module generally adopts a voice coil motor or an SMA actuator. [0004] The voice coil motor generates driving force t...

AI Technical Summary

Problems solved by technology

Existing SMA actuators usually directly pull the adjustment assembly through the SMA wire, so the driving stroke of the adjustment assembly is usually not greater than the shrinkage of the SMA wire, and the movement stroke can only be made by increasing the overall scale of the SMA actuator. Larger, so it is not conducive to the miniaturization of the liquid lens focusing device

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