A focusing method and system for a camera module

A technology of a camera module and a focusing method, which is applied in the field of photography and can solve problems such as long focusing time and affecting response time

Active Publication Date: 2018-05-01
GOERTEK OPTICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, during the focusing process of the camera module, it is necessary to poll the current interval formed by the focus starting current A when the camera module is down and the focus maximum stroke current D when the camera module is up, resulting in a relatively slow focusing time. long, affecting response time

Method used

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  • A focusing method and system for a camera module
  • A focusing method and system for a camera module
  • A focusing method and system for a camera module

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Embodiment Construction

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0028] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0029] In all examples shown and discussed herein, any specific values ​​should be construed as illustrative only, and not as limiting. Therefore, other instances of the exemplary embodiment may have dif...

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PUM

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Abstract

The invention discloses a focusing method of a camera module and a focusing system of the camera module, and obtains the focusing starting current and the focusing maximum stroke current when the camera module is upward, and the focusing starting current and the focusing maximum stroke current when the camera module is downward; Obtain the current pitch angle of the camera module; calculate the focus start current of the camera module at the current pitch angle according to the current pitch angle, the focus start current when the camera module is up, and the focus start current when the camera module is down; Calculate the maximum focus stroke current of the camera module at the current pitch angle by calculating the current pitch angle, the maximum focus stroke current when the camera module is up, and the focus maximum stroke current when the camera module is down. The focusing method of the camera module and the focusing system of the camera module of the present invention have short focusing time and fast response speed.

Description

technical field [0001] The present invention relates to the technical field of imaging, and more particularly, to a focusing method and system for a camera module. Background technique [0002] With the development of science and technology, a voice coil motor (Voice Coil Motor, VCM) is usually installed in the camera of digital products with camera functions such as mobile phones, tablet computers, and cameras, and the camera module is driven by the voice coil motor to achieve focusing. Generally speaking, by changing the current of the inner coil of the voice coil motor to adjust the position of the lens to change the focal length, so as to achieve autofocus. [0003] Referring to Figure 1, the voice coil motor 3 can drive the lens 2 to move within the frame 1 of the camera module for focusing. The range of movement of the lens 2 is between the starting position 4 and the maximum stroke position 5. The starting current of the voice coil motor is The critical current when ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232G03B13/36
Inventor 宋林东廖吉仁
Owner GOERTEK OPTICAL TECH CO LTD
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