Automatic focusing method of cell phone camera module, apparatus thereof and system thereof

Abstract

The invention provides an automatic focusing method of a cell phone camera module, an apparatus thereof and a system thereof. The method comprises the following steps that: a, initialization is carried out and an observation frame is arranged; a camera module enters a focusing station and equipment connection is established; b, a focusing value corresponded to the observation frame is calculated; c, a correct rotation direction of a focusing motor is determined; and d, according to the correct rotation direction of the focusing motor, rough focusing and fine focusing are carried out on the camera module so as to complete focusing. According to the invention, an automatic focusing process can be carried out on a cell phone camera module and the method has advantages of accuracy, reliability and high efficiency and the like. In addition, an image signal processing technology is employed; therefore, a focusing efficiency is improved; it can be avoided that a result by manual focusing is influenced by subjective consciousness of an operator; stability of product quality is enhanced; and burdens of the operator and labor costs of an enterprise are reduced.

Description

technical field [0001] The invention relates to the field of mobile phones, in particular to an automatic focusing method, device and system for a camera module of a mobile phone. Background technique [0002] The mobile phone camera module is a set of camera components built into the mobile phone. Before installing it on the mobile phone, the focal length of the lens needs to be adjusted, which is called module focusing. The process is to observe the imaging accuracy of a selected standard image by the module. , adjust the focal length of the lens of the module to make the image clear. The module consists of a lens, a mirror base, a wafer, a flexible circuit board, and a connector. The outer wall of the lens and the inner wall of the mirror base are threaded. After the lens is screwed into the mirror base, it can be rotated to move up and down relative to the mirror base. Focusing is generally assembled by machine or manually on the lens holder. A standard test chart is pl...

AI Technical Summary

Problems solved by technology

When manually adjusting the focus, if the human eye's judgment on the clarity of the image deviates, it will directly lead to a decrease in the image quality of the camera module, and if it is a little serious, it will affect the use of consumers

In addition, due to the large number of products, the operator has to conduct a single boring observation for a long time, and requires a long time of high concentration, which is easy to cause visual fatigue and make mistakes; the product quality is affected by the subjective consciousness of the operator, and the difference in the individual judgment of the worker The scale is not uniform, and the product quality is difficult to be guaranteed

Actual tests show that about 5% of camera modules fail to adjust to a qualified imaging state when manual focusing is performed

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