公开(公告)号：US20140285912A1

公开(公告)日：2014-09-25

申请号：US13261868

申请日：2012-11-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Gary T. Boyd ,  Qingbing WANG

IPC: G02B5/04

CPC classification number: G02B5/04 ,  G02B5/045 ,  G02B5/3083 ,  G02B6/0053 ,  G02B6/0056

Abstract: A brightness enhancement film includes a plurality of linear prisms disposed on a birefringent substrate. A light ray that enters the film from the substrate side and exits the film from the linear prisms side undergoes substantially a same phase retardation for mutually orthogonal polarization states while travelling within the film. The light ray exits the film at an angle from a normal to the substrate that is greater than 20 degrees.

Abstract translation: 亮度增强膜包括设置在双折射基板上的多个线性棱镜。 从衬底侧进入膜并从线性棱镜侧离开膜的光线在膜内行进时相互正交的极化状态基本上具有相同的相位延迟。 光线以与大于20度的基板的法线成一定角度离开膜。