Research On PZT Actuatorsused In Phone Cameras Focus System

Cell-phone with camera is becoming a fast growing consuming market. In thefollowing several years the growing trend will not stop. The cell-phone with focuscamera is becoming a basic function of the phone . In this article , the main work is tomake a micro PZT actuator used in focus phone .In the tradition, the digital camera is uses the stepper motor as the actuator, however,the structure is complex, the noise is big, the power consumption is big. Having thespring in the structure is a second choice for the actuation, this drive type is easy toreceive influence by the electromagnetic field. While the piezoelectricity type actuationmay dodge these flaws effectively. In this case, the piezoelectricity type drive typegradually enters people's field of vision.The main reach work of the article contains the following aspects:According to the design requirements, analyzing the PZT principle,PZTcharacteristic. Then putting forward preliminary plans for the design , analyzing theanalytic relationship of than models .Analyzing the displacement characteristic of the designs with finite element method.verify the relationship between finite method and mathematics method .optimize thedesign of the feasible design. do relevant optimization on PZT material, PZT depth, basematerial depth and so on. Make the design fit for the design requirement.