Camera device, SMA driving device, manufacturing method and driving method thereof

Through the bidirectional SMA drive device, the current adjustment technology of uplink and downlink drivers is used to solve the problems of short stroke, large energy consumption and uneven focus speed of existing SMA drivers, achieving more efficient and even lens movement and focus effects.

CN111629125BActive Publication Date: 2025-03-28NINGBO SUNNY OPOTECH CO LTD
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Patent Information

Application Number
CN201910151258.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-02-28
Publication Date
2025-03-28
Estimated Expiration
2039-02-28

AI Technical Summary

Technical Problem

The driving stroke of existing SMA drivers is short, resulting in short moving distance of the camera lens assembly, large energy consumption, uneven focus speed and poor stability.

Method used

Bidirectional SMA drive equipment, including an upstream driver and a downstream driver, controls the thermal driving direction and force of the SMA line through current adjustment to realize the up and down movement of the lens in the middle position.

Benefits of technology

It improves the movement response speed of the lens, reduces the unidirectional maximum driving current, reduces power consumption, uniforms the movement speed of the lens, and improves the uniformity of the focus speed.

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Abstract

The present invention provides a camera device, an SMA driving device, and a manufacturing method and a driving method thereof, wherein the camera device comprises at least one circuit board, a photosensitive chip, at least one lens, a lens holder, and at least one SMA driving device. The SMA driving device further comprises a lens carrier, at least one upward drive, and at least one downward drive, wherein the lens carrier is drivingly connected to the upward drive, the upward drive supports the lens carrier upward in a thermally driven manner, and pulls the lens carrier to move upward, wherein the lens carrier is drivingly connected to the downward drive, the downward drive pulls the lens carrier downward in a thermally driven manner, and pulls the lens carrier to move downward, wherein the lens is arranged on the lens carrier of the SMA driving device, and the SMA driving device drives the lens to move up and down.
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