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Minisize pick-up head module displacement sensor

A technology of displacement sensor and miniature camera, which is applied in the direction of instruments, installation, optics, etc., and can solve the problem of not having a position sensor of moving parts

Inactive Publication Date: 2008-09-17
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stepper motors can only memorize the initial position. Because the position is adjusted by the driving pulse current when driving, this type of motor does not have a position sensor that can judge the displacement of the movable part.

Method used

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  • Minisize pick-up head module displacement sensor
  • Minisize pick-up head module displacement sensor
  • Minisize pick-up head module displacement sensor

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] Embodiments of the displacement sensor for the miniature camera module of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] In the description, the resistance type displacement sensor of the present invention will be applied to an arbitrary linear actuator. This is just one embodiment, and the present invention can also be suitably applied to other lens drivers.

[0025] figure 1 Among (a) is the oblique view that is used to install the linear driver 20 of displacement sensor of the present invention;

[0026] figure 1 (b) is a sectional view of the linear actuator 20 for mounting the displacement sensor of the present invention.

[0027] First, if figure 1 As shown, as an embodiment of the linear driver 20 used to install the micro camera module of the displacement sensor of the present invention, the linear driver 20 is installed in the central part for voice coil motor or piezoelectric and other ways and...

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PUM

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Abstract

A small-sized camera head module displacement sensor is disclosed. The lens driver of the displacement sensor is composed of a moving component which has a plurality of glasses lens in the internal central location; a fixed resistor guide member which has a resistor passing through at least one side of the moving component; a lens cone covering the moving component and the fixed resistor guide member; and a base which supports the moving component and the fixed resistor guide member and is equipped with lens in the internal central location. The moving component moves along with the lens cone and the fixed resistor guide member. The lens driver of the displacement sensor also includes a connecting lead member connected with more than one fixed resistor guide member, contact materials locating at both sides of the connecting lead member and contacting with the fixed resistor guide member, and a circuit connecting the fixed resistor guide members. The connecting lead member and the contact materials move along with the movement of the fixed resistor guide member, so as to percept and lead-out the displacement of the moving component. The invention is a displacement sensor with accurate displacement, simple and convenient manufacturing and low price.

Description

technical field [0001] The present invention relates to the invention of a displacement sensor in a lens driver device for performing Auto Focusing and Optical Zooming in a miniature portable terminal. Background technique [0002] In recent years, with the continuous development of communication technology and digital information processing technology, portable terminal technology that integrates functions such as information processing and calculation, communication, and image information input and output has gradually emerged. For example: PDA with digital camera and communication function installed, mobile phone with digital camera function added, personal multi-media player (PMP: personal multi-media player), etc. are all products produced by using this type of technology. Due to the continuous development of digital camera technology and information storage capabilities, the installation of high-level digital camera modules (digital camera modules) is becoming more com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B13/36G02B7/04G01B7/04
Inventor 吴昌熏李英珠全赫仁太善
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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