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. 02, 2010
Filed:
May. 21, 2004
Tetsuya Hoshino, Tsukuba, JP;
Yasushi Sugimoto, Tsukuba, JP;
Teruo Teshima, Chikusei, JP;
Tomo Dobashi, Chikusei, JP;
Tetsuya Hoshino, Tsukuba, JP;
Yasushi Sugimoto, Tsukuba, JP;
Teruo Teshima, Chikusei, JP;
Tomo Dobashi, Chikusei, JP;
Hitachi Chemical Co., Ltd., Tokyo, JP;
Abstract
An optical filmhas a transparent base filmmade of polyethylene terephthalate (PET), a prism made of photo-curing resin such as acryl modified epoxy on an incident surfacethat is one face of the base film, and a hologram similarly made of photo-curing resin on an exit surfaceopposing the incident surface. The prism has grooves or ridges each having a substantially triangular cross section to totally reflect incident light so as to bend the light into a direction perpendicular to the exit surfaceThe hologram anisotropically diffuses light exiting from the exit surface, to improve brightness.