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. 17, 2012
Filed:
May. 19, 2010
Tzeng-ke Shiau, Hsinchu, TW;
Ching-shiang LI, Hsinchu, TW;
Wen-chih Huang, Hsinchu, TW;
Fu-ming Chuang, Hsinchu, TW;
Kuo-tung Tiao, Hsinchu, TW;
Tzeng-Ke Shiau, Hsinchu, TW;
Ching-Shiang Li, Hsinchu, TW;
Wen-Chih Huang, Hsinchu, TW;
Fu-Ming Chuang, Hsinchu, TW;
Kuo-Tung Tiao, Hsinchu, TW;
Coretronic Corporation, Hsinchu, TW;
Abstract
A brightness enhancement film (BEF) includes a light transmissive substrate having a first surface and a second surface, a plurality of lenses disposed on the first surface, and a reflective layer. Each of the lenses has a curved protruding surface facing away from the light transmissive substrate. The radius of curvature of the curved protruding surface in a first direction parallel to the first surface is R, the radius in a second direction is R, and R≠R. The reflective layer is disposed on the second surface and has a plurality of light pass openings respectively located on the optical axes of the lenses. The distance between the apex of the curved protruding surface and the corresponding light pass opening is L, the refractive index of the lenses is n, and the BEF satisfies L<nR/(n−1) and L<nR/(n−1). A backing light module using the BEF is provided.