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:
Aug. 21, 2012
Filed:
Feb. 05, 2010
Myeong-ho Jeon, Incheon, KR;
Moon-chul Shin, Gyeonggi-do, KR;
Kang-hoon Choi, Gyeonggi-do, KR;
Hyon-myong Song, Daegu, KR;
Jin-hee Cho, Gyeonggi-do, KR;
Kyung-han Kim, Gyeonggi-do, KR;
Hyun-jun Jang, Gyeonggi-do, KR;
Myeong-Ho Jeon, Incheon, KR;
Moon-Chul Shin, Gyeonggi-do, KR;
Kang-Hoon Choi, Gyeonggi-do, KR;
Hyon-Myong Song, Daegu, KR;
Jin-Hee Cho, Gyeonggi-do, KR;
Kyung-Han Kim, Gyeonggi-do, KR;
Hyun-Jun Jang, Gyeonggi-do, KR;
Samsung Electronics Co., Ltd., Yeongtong-gu, Suwon-si, Gyeonggi-do, KR;
Abstract
A focus control device for a beam projector allows the focus of a lens assembly to be finely and easily controlled. The focus control device includes: a control member rotatably mounted on the beam projector for controlling the focus of a lens assembly; a rotary eccentric member provided in the control member, the rotary eccentric member having a control axis eccentric to the rotary axis of the control member, and being rotated while depicting an elliptical trace in response to the rotation of the control member; a focus guide member provided in the rotary eccentric member, the focus guide member allowing the lens assembly to be moved rectilinearly in the direction of an optical axis in response to the rotation of the control member; and an actuating member provided in the lens assembly and coupled to the focus guide member, the actuating member moving the lens assembly in the direction of the optical axis in response to the movement of the focus guide member. According to the present invention, with the rotation of the rotary dial, the moving distance of the lens assembly can be easily controlled, and the lens assembly can be moved finely to project a sharp picture image.