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:
Jul. 05, 2011
Filed:
Jul. 27, 2007
Applicants:
Hyoung-joo Kim, Euiwang-si, KR;
In-sun Hwang, Suwon-si, KR;
Heu-gon Kim, Suwon-si, KR;
Sung-kyu Shim, Seoul, KR;
Taek-sun Shin, Cheonan-si, KR;
Inventors:
Hyoung-Joo Kim, Euiwang-si, KR;
In-Sun Hwang, Suwon-si, KR;
Heu-Gon Kim, Suwon-si, KR;
Sung-Kyu Shim, Seoul, KR;
Taek-Sun Shin, Cheonan-si, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A dual prism sheet includes a base film, upper prisms formed on an upper surface of the base film and lower prisms formed on a lower surface of the base film. A cross-section of the upper and lower prisms is formed as an isosceles triangular shape having a base and a vertex angle, and a phase of the upper prisms is delayed between about 0 and about 0.5 times of a prism pitch with respect to a phase of the lower prisms.