Method, device and equipment for calibrating lens module comprising voice coil motor

A lens module and voice coil motor technology, which is applied to color TV parts, TV system parts, TVs, etc., can solve the problems of long shooting time, long time consumption, shallow depth of field of lens modules, etc., and achieve fast The effect of accurate focus

Active Publication Date: 2020-06-09
ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In practical applications, fixed focus or automatic focus methods are generally used to focus lens modules with voice coil motors, but the depth of field of lens modules in fixed focus methods is relatively shallow, which may not meet the needs of users, while automatic focus Focusing needs to continuously search for a clear point within the VCM current range, which takes a long time, resulting in a long shooting time and affecting user experience

Method used

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  • Method, device and equipment for calibrating lens module comprising voice coil motor
  • Method, device and equipment for calibrating lens module comprising voice coil motor
  • Method, device and equipment for calibrating lens module comprising voice coil motor

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[0047] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0048] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0049] figure 1 It is a schematic structural diagram of a lens module with a voice coil motor in the embodiment of this specification. Such as figure 1 As shown, it includes: a ...

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Abstract

The embodiment of the invention discloses a method, device and equipment for calibrating a lens module comprising a voice coil motor. According to the scheme, the method comprises the following steps:acquiring a plurality of calibrated driving current values of a lens module comprising a voice coil motor; acquiring a plurality of calibration object distances that correspond to the plurality of calibration driving current values and represent the distances between the lens module and target images for calibration; and according to the plurality of calibration driving current values and the plurality of calibration object distances, carrying out linear fitting to obtain a mapping function used for focusing the lens module.

Description

technical field [0001] The present application relates to the technical field of high-precision measurement, and in particular to a method, device and equipment for calibrating a lens module including a voice coil motor. Background technique [0002] In the prior art, a lens module with a camera function in devices such as smartphones is usually provided with a voice coil motor (Voice Coil Motor, VCM). The function of the voice coil motor in the lens module is to drive the lens to move, so as to realize the adjustment of the focal length, so that the lens module can capture clear images. [0003] The focusing principle of the lens module with a voice coil motor is to control the stretching position of the spring leaf by changing the DC current of the inner coil of the motor in a permanent magnetic field, thereby driving the lens on the spring leaf to move. Based on this principle, the lens module with a voice coil motor can achieve high focusing accuracy. [0004] In pract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N17/00
CPCH04N17/002H04N23/671H04N23/67
Inventor 何炜雄梁明杰李志荣刘源
Owner ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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