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:
Dec. 23, 2003
Filed:
Sep. 24, 2001
Kohei Arakawa, Shizuoka, JP;
Fumihiko Mochizuki, Shizuoka, JP;
Kenichi Nakagawa, Shizuoka, JP;
Mitsuyoshi Ichihashi, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A flat plate collimator and backlight system capable of improving the display characteristics of liquid crystal display devices are obtained. In order to achieve this end, a collimator is provided which comprises a cholesteric liquid crystal layer exhibiting a selective-reflection wavelength band with respect to perpendicularly-incident light in the wavelength range &lgr; to &lgr; (&lgr; <&lgr; ), and which satisfies the relation &lgr; <&lgr; with respect to the maximum-emission wavelength &lgr; in the emission spectrum of the light source with which the collimator is used in combination, and a backlight system employing this collimator and light source is provided.