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:
Apr. 08, 2014
Filed:
May. 18, 2011
Applicants:
Hee-joong Lee, Gyeonggi-do, KR;
Jin-ho Kim, Seoul, KR;
Sung-hoon Hwang, Seoul, KR;
Seung-ki Hong, Gyenggi-do, KR;
Inventors:
Hee-Joong Lee, Gyeonggi-do, KR;
Jin-Ho Kim, Seoul, KR;
Sung-Hoon Hwang, Seoul, KR;
Seung-Ki Hong, Gyenggi-do, KR;
Assignee:
Sekonix Co., Ltd, Gyeonggi-do, KR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection lens unit for a pica-projector includes a plurality of plastic lenses and a single glass lens to minimize a change in focal length due to the heat generated inside the pico-projector. The lens array includes: