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:
Mar. 29, 2011
Filed:
Sep. 03, 2008
Young Soo Han, Uiwang-si, KR;
Jun Hyeak Choi, Uiwang-si, KR;
Seok Hoon Jang, Uiwang-si, KR;
Ju Yeol Choi, Uiwang-si, KR;
Young Soo Han, Uiwang-si, KR;
Jun Hyeak Choi, Uiwang-si, KR;
Seok Hoon Jang, Uiwang-si, KR;
Ju Yeol Choi, Uiwang-si, KR;
Cheil Industries, Inc., Gumi-si, Gyeongsangbuk-do, KR;
Abstract
A prism sheet includes a transparent base film with first and second surfaces and an optical refracting part with a plurality of prism units on the second surface, wherein the prism units are integral with the transparent base film, each prism unit having a predetermined height and extending along a first direction on the second surface of the transparent base film, wherein each prism unit includes a ridge extending along the first direction, a distance along a normal between the second surface of the transparent base film and the ridge defining the predetermined height of the prism unit, and wherein at least two prism units include ridges inclined at a predetermined angle other than zero with respect to the second surface of the transparent base film, the inclined ridges being unevenly distributed on the second surface of the transparent base film.