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A closed-loop lens drive motor

A lens drive, lens technology, applied in installation, optics, instruments, etc., can solve the problems of slow response speed and high power consumption

Active Publication Date: 2016-09-07
SHANGHAI BILLU ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But generally speaking, these lens driving devices are open-loop settings, so there are disadvantages of slow response and high power consumption

Method used

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  • A closed-loop lens drive motor
  • A closed-loop lens drive motor
  • A closed-loop lens drive motor

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0015] Such as figure 1 as shown,

[0016] A lens drive motor comprising

[0017] shielding cover 1,

[0018] front cover 2,

[0019] Base 3,

[0020] Carrier 4,

[0021] magnet 5,

[0022] PCB board 6,

[0023] Ball 7,

[0024] Yoke iron 8,

[0025] Wherein the PCB board 6 is provided with a coil 9 and a Hall element 10 .

[0026] Such as figure 2 with image 3 As shown, the lens carrier 4 is located in the base 3, the lens carrier 4 is provided with a PCB board 6 outside, the inside of the PCB board 6 is provided with a coil 9, the center of the coil 9 is provided with a Hall element 10, and the outside of the PCB board 6 is provided with a yoke 8, The outside of the lens carrier 4 is provided with a magnet 5 near the coil side, the front end of the base 3 is provided with a front cover 2 , and the outside of the base and the front cover 2...

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PUM

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Abstract

The invention discloses a closed-loop lens driving motor, which comprises a base, and a lens carrier is arranged inside the base, and is characterized in that a PCB board is arranged outside the lens carrier, a coil is arranged inside the PCB board, a Hall element is arranged at the center of the coil, and a PCB board is arranged outside A yoke is provided, a magnet is provided on the side of the lens carrier close to the PCB, and a shielding cover is provided outside the base. The operating principle of the drive motor is that the energized coil generates a magnetic field, which generates a force with the magnetic field of the magnet to push the lens carrier forward and backward. The Hall element in the center of the coil senses the position of the magnet and outputs an electrical signal. After the control chip receives the electrical signal The calculation is performed, and the output signal controls the magnitude of the input current of the coil to change, thereby controlling the lens carrier to achieve balance at a certain position. The present invention adopts the Hall element to realize the feedback, and because the control chip has the memory capability, the adjusting response speed is fast.

Description

technical field [0001] The invention relates to a lens driving device, in particular to a closed-loop lens driving motor applied to a camera, a video camera or a mobile phone with a camera function to drive the lens to move and adjust the focal length. Background technique [0002] With the diversification of functions of digital products, digital devices equipped with video cameras or cameras, such as mobile phones, multimedia players, etc., have been developed rapidly and widely used. The above-mentioned video cameras or cameras usually adopt lenses with adjustable focal length or auto-focus, and the adjustment process is to change the position of the lens, and a drive motor is usually used to drive the lens to move. [0003] The driving device for adjusting the focal length of a traditional camera usually includes stepping motors, gears, cams, and connecting rods. A lens structure with a stable autofocus function disclosed in Chinese patent document CN2938165Y includes a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/04H02K33/18G03B30/00
Inventor 王建华
Owner SHANGHAI BILLU ELECTRONICS CO LTD