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Actuator and camera module provided with actuator

A technology of an actuator and a moving frame, which is applied in the directions of cameras, instruments, installations, etc., can solve the problem of low focusing accuracy, and achieve the effect of improving focusing accuracy.

Active Publication Date: 2014-01-22
郑州联创电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many kinds of actuators in the prior art, one of which is a shape memory alloy (Shape Memory Alloy, SMA) actuator, however, the focusing accuracy of the shape memory alloy actuator is not high

Method used

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  • Actuator and camera module provided with actuator
  • Actuator and camera module provided with actuator
  • Actuator and camera module provided with actuator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] see Figure 1 to Figure 3 , is a camera module 100 according to an embodiment of the present invention. The camera module 100 includes an actuator 200 and a lens unit 15 . The actuator 200 includes a base 10 , an elastic piece 11 , a fixed frame 12 , a movable frame 14 , and a driving unit 16 .

[0015] The base 10 is roughly flat. A circular light exit hole 101 is defined at the center of the base 10 . The base 10 includes an upper surface 102 . A convex plate 103 is formed at a corner of the upper surface 102 , and a protruding post 104 is formed on the convex plate 103 . A fixing hole 105 is formed at another corner of the upper surface 102 opposite to the protrusion 104 . Positioning pillars 106 and positioning holes 107 are respectively formed at the other two corners of the upper surface 104 .

[0016] The elastic sheet 11 is in a ring shape, and the inner diameter of the elastic sheet 11 is larger than the diameter of the light exit hole 101 . Two lugs 111...

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PUM

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Abstract

The invention relates to an actuator including a base, a fixing frame, a movable frame and a drive unit. The fixing frame is fixedly arranged on the base. The movable frame is accommodated in the fixing frame and loaded on the base. The movable frame includes an abutting face which faces the base. The drive unit includes an SMA wire, a controller, a position sensor and a guide rod. The SMA wire includes a bending part arranged between two ends, wherein the bending part contacts the abutting face. The guide rod passes through the movable frame and is fixed on the base. The controller is used for applying current to heat the SMA wire and change the length of the SMA wire so as to drive the movable frame to move along the guide rod. The position sensor is used for sensing the position of the movable frame and transmitting the sensing result to the controller. The controller is also used for adjusting the size of the current according to the sensing result.

Description

technical field [0001] The invention relates to the field of imaging, in particular to an actuator and a camera module with the actuator. Background technique [0002] With the rapid development of communication technology, camera modules have been widely used in portable electronic devices such as mobile phones. In order to improve the quality of pictures taken by the camera module, the camera module generally has a zoom function, and has an actuator that can drive the camera module to zoom. [0003] There are many kinds of actuators in the prior art, one of which is a shape memory alloy (Shape Memory Alloy, SMA) actuator, however, the focusing accuracy of the shape memory alloy actuator is not high. Contents of the invention [0004] In view of this, it is necessary to provide an actuator capable of achieving precise focusing and a camera module with the actuator. [0005] An actuator includes a base, a fixed frame, a movable frame and a driving unit. The fixed frame ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/08G03B13/32G03B30/00
Inventor 丘祺纬
Owner 郑州联创电子有限公司
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