Camera module with automatic focusing function and focusing method thereof

A camera module and driving film technology, which is applied to the focusing device of the camera, the mechanism that generates mechanical power, the camera, etc., can solve the problems of slow electrical response speed, lag, unfavorable fast focusing, etc.

Inactive Publication Date: 2009-04-29
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of VCM and liquid lens to realize the auto-focus function requires electrical signals to drive, and both of them have a large hysteresis effect compared with the electrical drive signal, and the electrical response speed is slow, which is not conducive to fast focusing.

Method used

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  • Camera module with automatic focusing function and focusing method thereof
  • Camera module with automatic focusing function and focusing method thereof
  • Camera module with automatic focusing function and focusing method thereof

Examples

Experimental program
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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] See figure 1 , Is a camera module 100 provided by the first embodiment of the present invention, which includes a lens holder 110, a lens barrel 120, and an image sensor 130. The lens holder 110 has a top accommodating cavity 112 and a bottom accommodating cavity 113 for accommodating the lens barrel 120 and the image sensor 130, respectively, and the lens barrel 120 is provided with optical elements and image sensors. The device 130 is optically coupled, and the optical center of the lens barrel 120 and the image sensor 130 are located on the same optical axis 60.

[0029] The lens barrel 120 is provided with optical elements, such as various lenses 121 arranged in order. The outer diameter of the lens barrel 120 is equal to the diameter of the top accommodating cavity 112, so that the lens barrel 120 is positioned on the optical axis 60. The direction m...

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Abstract

A camera module comprises a lens base, a lens cone and an image sensor. The lens cone and the image sensor are arranged in the lens base, and an optical component is arranged in the lens cone and coupled with the image sensor. The camera module further comprises at least one drive chip and a corresponding elastic sheet; the drive chip comprises a substrate, a shape memory alloy film arranged on the substrate and a control drive circuit; the control drive circuit supplies a drive current to the shape memory alloy film to cause the film to generate a recovery stress by resistance heating so that the drive chip is bent to drive the lens cone to move along an optical axis; and the control drive circuit stops supplying the drive current to cool the shape memory alloy film and eliminate the recovery stress, thus the elastic sheet rebounds to the lens cone.

Description

Technical field [0001] The invention relates to a camera module, in particular to a camera module with an automatic focusing function. Background technique [0002] With the development of camera technology, camera modules have been widely used in camera devices for various purposes. The combination of camera modules and various portable electronic devices such as mobile phones, cameras, computers, etc., has been favored by many consumers. . [0003] The camera module usually includes a driving motor, at least one lens module driven by the driving motor, and a photosensitive component optically coupled with the lens module. The lens module may include one or more lenses, and the lenses are optically coupled with the photosensitive component. Preferably, the center point of the photosensitive component is located on the optical axis of the one or more lenses. The driving motor drives the lens module to move relative to the photosensitive component to find an imaging position with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B13/36G02B7/09G02B7/28
CPCG03B3/10G02B13/001G03B13/36G02B7/08H04N5/23212F03G7/065H04N5/2257H04N23/57H04N23/67
Inventor 陈杰良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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