Automatic focusing device

An autofocus and lens technology, which is applied in the direction of focusing devices, focusing devices, camera focusing devices, etc., can solve the problems of complex structure of the lens driving device and achieve the effect of simple structure
CN1790150AInactive Publication Date: 2006-06-21HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
Publication Date
2006-06-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a self-focusing device, which contains lens tube and piezo element in the lens tube, wherein the lens tube is composed of the first lens group, second lens group and lens, which realizes the focusing function; the lens is contained in the piezo element, which connects the variable voltage circuit electrically.
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Description

【Technical field】

[0001] The invention relates to an automatic focus device of a digital camera, in particular to an automatic focus device of a digital camera for electronic devices. 【Background technique】

[0002] Most of the optical modules of digital cameras used in electronic devices (such as mobile phones, PDAs, etc.) are fixed-focus designs, so they cannot realize the zoom function. In order to shoot farther objects, it is necessary to change the object distance, so the position of the lens needs to be adjusted. The focusing mechanism of a traditional digital camera generally uses a motor and a transmission mechanism to drive the lens to move to perform the focusing action. It needs to be equipped with a complex transmission mechanism to implement it. Used on smaller electronic devices.

[0003] In the prior art, a piezoelectric element is used to drive the lens to achieve the focus of the camera. For example, U.S. Patent No. 4,601,539 discloses a lens moving device ...

Claims

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