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. 03, 2007
Filed:
Apr. 11, 2005
Ikuo Onishi, Tsukuba, JP;
Satoko Horikoshi, Tsukuba, JP;
Toshiyuki Ito, Tsukuba, JP;
Shigeki Kikuyama, Tsukuba, JP;
Ikuo Onishi, Tsukuba, JP;
Satoko Horikoshi, Tsukuba, JP;
Toshiyuki Ito, Tsukuba, JP;
Shigeki Kikuyama, Tsukuba, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
The invention is directed to a lighting system having a reflector, light sources and a light control member sequentially disposed from a light incident side to a light outgoing side. Preferably used for large displays requiring high uniformity, this invention eliminates lamp image and removes the necessity to do light source repositioning, while enabling luminance in the exit plane to achieve excellent luminosity and uniformity. This invention achieves total light transmittance of more than 50% when light is incident at a predetermined angle a from the normal direction of the incident plane and achieves 1.05–3 times more total light transmittance than when the light is from a direction normal to the incident plane. This is achieved by the light control member by controlling the ratio between total light transmittance in the positions of greater transmittance and the total transmittance in the positions of lesser transmittance.