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. 26, 2013
Filed:
Nov. 26, 2007
Young Soo Han, Gyeonggi-do, KR;
Seok Hoon Jang, Gyeonggi-do, KR;
Jun Hyeak Choi, Gyeonggi-do, KR;
Man Suk Kim, Gyeonggi-do, KR;
Kyu Ha Chung, Gyeonggi-do, KR;
Young Soo Han, Gyeonggi-do, KR;
Seok Hoon Jang, Gyeonggi-do, KR;
Jun Hyeak Choi, Gyeonggi-do, KR;
Man Suk Kim, Gyeonggi-do, KR;
Kyu Ha Chung, Gyeonggi-do, KR;
Cheil Industries, Inc., Gumi-si, Kyeongsangbuk-do, KR;
Abstract
A prism sheet, capable of enhancing wet-out ability in a whole back light unit while maintaining center brightness, transmittance and haze in good condition, is disclosed. The prism sheet includes a base film made of a transparent material and having a flat first surface, and a light refracting part including a plurality of unit prisms unitarily formed with the base film on a second surface of the base film, opposite to the flat first surface. The unit prisms have a predetermined shape of a cross section, and are arranged with orientation. When an angle formed between a ridge of the unit prism of the light refracting part and a normal line of the flat first surface is defined as θ, θand θhave different values from each other, and n is an integer more than 2. An LCD back light unit using the above prism sheet is also disclosed.