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Automatic focusing method and electronic device of camera module

An automatic focus, electronic device technology, applied in focusing devices, cameras, installations, etc., can solve the problems of long focusing time of the lens, large moving distance of the lens, unable to sample the best focusing position of the lens, etc., and achieve the effect of good image quality.

Active Publication Date: 2010-11-17
ASUSTEK COMPUTER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the number of samples required to use this method is inversely proportional to the distance the camera moves each time
In other words, the smaller the moving distance of the lens, the more sampling times, the higher the accuracy of focusing, but the lens needs a longer time to focus
Conversely, if you want to reduce the focusing time of the lens, the number of sampling times for focusing will be reduced accordingly, and the moving distance of the lens is relatively large, which will cause the situation that the best focusing position of the lens cannot be sampled

Method used

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  • Automatic focusing method and electronic device of camera module
  • Automatic focusing method and electronic device of camera module
  • Automatic focusing method and electronic device of camera module

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Embodiment Construction

[0025] figure 1 is a schematic diagram of an electronic device according to an embodiment of the present invention, and figure 2 for figure 1 Partial cross-sectional view of an electronic device. Please also refer to figure 1 and figure 2 , the electronic device 100 of the present invention may be a mobile phone with a camera function, a personal digital assistant (Personal Digital Assistant) or a notebook computer (Note Book), and this embodiment uses a mobile phone as an example for illustration. The electronic device 100 includes a first casing 110 , a second casing 120 , a camera module 130 and a controller 140 . The first casing 110 is adapted to be connected to the second casing 120 , and the camera module 130 is disposed between the first casing 110 and the second casing 120 . The camera module 130 includes a lens group 132 , an actuator 134 and a photosensitive component 136 . The mirror group 132 is disposed on the second housing 120 , and the actuator 134 is ...

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Abstract

The invention relates to an automatic focusing method of a photography module, focusing movement is divided into two stages, in the first stage, the photography module and a controller are provided, wherein, the controller and the photography module are electrically connected; when the lens group of the photography module is positioned at an initial position, the controller can calculate an automatic focusing score of the photography module; then, the lens group moves two times towards a first direction by a first distance, wherein, the controller calculates the automatic focusing score of the photography module each time when the lens group moves; afterward, the controller carries out judgment by virtue of the difference value of two continual automatic focusing scores, and controls the moving direction of the lens group by utilizing the judgment result.

Description

technical field [0001] The present invention relates to an automatic focusing method of a camera module and its electronic device, and in particular to an automatic focusing method of a camera module capable of fast and precise focusing and an electronic device using the method. Background technique [0002] With the advancement of technology, single-unit single-function electronic devices have gradually evolved into single-unit multi-function electronic devices to meet consumers' demands for convenience. [0003] In terms of the multi-functionality of mobile phones, current mobile phones not only provide communication functions, but also provide functions such as games, surfing the Internet, e-books, and photography. Among them, the camera function that can capture real-time images is very popular among the public. The camera function of the mobile phone is mainly provided by a camera module installed in the mobile phone. Generally speaking, the autofocus method of the cam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B13/36G02B7/28G03B30/00
Inventor 黄英杰
Owner ASUSTEK COMPUTER INC
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