Piezoelectric ceramic driver for optical focusing and zooming of mobile phone

Abstract

The invention relates to the field of piezoelectric ceramic drivers, in particular to a piezoelectric ceramic driver for optical focusing and zooming of a mobile phone. The structure of the piezoelectric ceramic driver comprises a disc stator at the center, a piezoelectric ceramic plate stuck to the surface of the stator, and a mobile body in threaded fit with the stator, wherein the piezoelectric ceramic plate is of a thin ring shape, and upper and lower surface electrodes of the ring-shaped ceramic are of fan-shaped quarter shapes; and when electrical signals are introduced to the surfaces of four fan-shaped regions of the piezoelectric ceramic, continuous driving force is formed on the internal thread of the disc stator to propel the mobile body to rotate spirally relative to the stator so as to realize axial linear motion. The manufacturing process is simple and suitable for industrialized production; compared with the prior art, the piezoelectric ceramic driver is easily microminiaturized, the output performance of an executor is more stable, and the piezoelectric ceramic driver has broad application prospect in the fields of optical focusing, precision driving and micro systems. Particularly, the piezoelectric ceramic driver can realize double effects on focusing and zooming in an embedded lens of the mobile phone or a notebook computer.

Description

technical field The invention relates to the field of piezoelectric ceramic drivers, in particular to a piezoelectric ceramic driver that can be used for optical focusing and zooming of mobile phones. Background technique With the development of science, there is an urgent need for miniature linear actuators in the fields of optical focusing, precision driving and microsystems. The efficiency of the original electromagnetic drive drops sharply at the micro scale, and it is difficult to manufacture. The piezoelectric driver is a new type of driver, which uses the inverse piezoelectric effect of piezoelectric ceramics to convert small-amplitude vibrations into required motions through structural design, and has the advantages of simple structure, easy miniaturization, power-off self-locking, etc. It has broad application prospects in the above fields. Especially in the field of mobile phone optical focusing, notebook computer built-in video lens, medical optical focusing and...

AI Technical Summary

Problems solved by technology

That is to say, its structural thickness direction is not easy to be thinned, and it is not compatible with the integrated circuit technology, and there are deficiencies in the thinning design of the product; c) the structure of the multi-faceted tube body 121 of the ultrasonic motor in this invention is a non-axisymmetric structure, which is not suitable for producing ideal and stable bending traveling waves

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