The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2005
Filed:
Dec. 11, 2003
Jung Ho Ryu, Suwon, KR;
Dae Hyun Jeong, Suwon, KR;
Oui Serg Kim, Seoul, KR;
Byung Woo Kang, Seoul, KR;
Jung Ho Ryu, Suwon, KR;
Dae Hyun Jeong, Suwon, KR;
Oui Serg Kim, Seoul, KR;
Byung Woo Kang, Seoul, KR;
Samsung Electro-Mechanics Co., Ltd., Kyungki-do, KR;
Abstract
The present invention relates to a lens driving device, more particularly, capable of adjusting an effective focal length determined by the relative distance of lenses in an optical device having a zooming function. In the lens driving device, a barrel unit has an internal space for containing a lens therein and a guide slot for allowing forward and backward movement of the lens through rotation of the barrel unit. A ring-shaped piezoelectric actuator unit is arranged adjacent to the barrel unit for being contracted or expanded radially in response to an external input signal. A drive member is mounted on the piezoelectric actuator unit and having a plurality of segments projected toward the barrel unit to contact the same.