Rapidly-focusing mobile phone camera shooting module

Abstract

The invention discloses a rapidly-focusing mobile phone camera shooting module which comprises a microprogrammed control unit, a lens, a focusing motor for driving the lens to move and a distance measuring sensor. The microprogrammed control unit is used for obtaining a signal of the distance measuring sensor, calculating the focusing position of the lens and controlling the focusing motor to drive the lens to move to the focusing position for focusing. By means of the rapidly-focusing mobile phone camera shooting module, mobile phone system sources are not occupied, the focusing position of the lens can be accurately obtained, and ultra-fast focusing of a mobile phone can be achieved.

Description

technical field [0001] The invention relates to a camera module, in particular to a camera module for fast focusing of a mobile phone. Background technique [0002] People hope to be able to capture wonderful and beautiful moments when taking photos. At present, only professional cameras are equipped with camera modules with fast focusing speed, and the focusing speed of existing smartphones has been unable to keep up. The autofocus speed has always been the primary topic for those skilled in the art. [0003] At present, smart phones use the traditional passive contrast method to focus, that is, directly receive and analyze the scene image, and find the best focusing lens position by comparing the contrast of different lens position images. The advantages of this automatic focus method are: It does not require a transmission system itself, so it consumes less energy and is conducive to miniaturization, so it can be applied to portable mobile terminals such as smartphones. ...

AI Technical Summary

Problems solved by technology

Although this traditional focusing method can perform automatic focusing, it cannot achieve good focusing when the ambient light is weak or the brightness contrast is low, and it can also focus on objects with thin lines, polarized light, black or mirror surfaces It is more difficult, and even in the case of good light environment, the focusing speed is quite slow, because the principle of the contrast method determines that it must rely on moving the lens many times and then use the difference method to approach successively to find the best focus position of the lens, while It takes a lot of time to move the lens multiple times. However, people have certain requirements for the focusing time in the actual shooting process. If the focusing time is too long, they often miss the wonderful moment, causing regret.

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