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Voice coil motor for driving liquid lens and lens assembly with voice coil motor

A technology of voice coil motor and lens assembly, which is applied in the direction of electric components, connection with control/drive circuit, lens, etc., which can solve the problems of inability to obtain auto-focus and optical anti-shake effects, and inability to accurately control the displacement and deformation of liquid lens, etc. Achieve the effect of automatic focus and optical image stabilization, precise displacement and deformation, and weight reduction

Active Publication Date: 2019-07-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current driving device of the liquid lens cannot accurately control the displacement and deformation of the liquid lens when performing autofocus and optical image stabilization, thus failing to achieve good autofocus and optical image stabilization effects

Method used

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  • Voice coil motor for driving liquid lens and lens assembly with voice coil motor
  • Voice coil motor for driving liquid lens and lens assembly with voice coil motor
  • Voice coil motor for driving liquid lens and lens assembly with voice coil motor

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Embodiment Construction

[0062] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0063] In application scenarios such as taking photos and videos, it is often necessary to change the focus position of the camera or lens to achieve automatic focus and optical image stabilization.

[0064] Autofocus (auto focus, AF) is to use the principle of light reflection of the subject to image and receive the light reflected by the subject through the lens on the image sensor, and obtain the object distance of the subject through computer processing. Automatically move the lens to complete the focus adjustment.

[0065] Optical image stabilization (OIS) refers to the setting of optical components in imaging instruments such as cameras, such as lens settings, to avoid or reduce the phenomenon of instrument shake that occurs during the process of capturing optical signals, so as to improve image quality. A common practice is...

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Abstract

The invention provides a voice coil motor for drives a liquid lens and a lens assembly with the voice coil motor. The voice coil motor comprises a number of sub-motor parts which are independently controllable. Each sub-motor part comprises a fixed part, a movable part movable relative to the fixed part along the optical axis direction, and a connection elastic piece which is connected with the liquid lens and the movable part. The movable part drives the connection elastic piece to press the liquid lens when the movable part is subjected to a force in the optical axis direction. The connection elastic piece is a leaf spring, and the stiffness coefficient in the optical axis direction is greater than the stiffness coefficient of the connection elastic piece in a direction perpendicular tothe optical axis. The voice coil motor further comprises a driving circuit part which controls the moving distance of the movable part. The voice coil motor provided by the technical scheme can accurately achieve autofocus and optical anti-vibration of the liquid lens at the same time.

Description

technical field [0001] Embodiments of the present application relate to the field of lens driving devices, and more specifically, relate to a voice coil motor for driving a liquid lens and a lens assembly with the voice coil motor. Background technique [0002] Autofocus (auto focus, AF) is to use the principle of light reflection of the subject to image and receive the reflected light on the image sensor after passing through the lens, and then obtain the subject distance of the subject through computer processing, and then automatically focus on the subject according to the subject distance. Move the lens to complete the focus. [0003] Optical image stabilization (OIS) is a kind of shake detection through the gyroscope, and then the OIS motor translates or rotates the entire lens in the opposite direction to compensate for the image blur caused by the shake of the terminal device during exposure. [0004] For traditional lenses, different motor components are usually use...

Claims

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Application Information

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IPC IPC(8): G02B26/00G02B3/14G02B7/09G02B27/64G03B13/36G03B5/00H02K33/00H02K11/30H02K11/215
CPCG02B3/14G03B13/36G03B5/00H02K41/0356G02B27/646G03B3/10G03B5/02G03B30/00G03B2205/0015G03B2205/0069G03B2205/0084G02B7/09G02B7/023H02K11/33G02B26/004G03B2205/0007H02K2211/03
Inventor 夏太红杨川王建文江海霞蒋磊李邓峰居远道
Owner HUAWEI TECH CO LTD
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