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:
Sep. 21, 2004
Filed:
May. 16, 2000
Tadayuki Kameyama, Osaka, JP;
Hironori Motomura, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
A liquid-crystal display device having a polarizing element, an optical element, a polarized light supply unit, and liquid-crystal cells. The polarizing element has a function of separating natural light into reflected or transmitted light composed of polarized light, wherein a half-reflecting wavelength in each position in a surface of the polarizing element ranges within ±10 nm relative to a half-reflecting average wavelength when the half-reflecting wavelength is a wavelength which is located at a long or short wave side of a wavelength exhibiting maximum reflectivity on the basis of a spectrum of reflected light in a predetermined wave range in which the natural light is separated into the reflected light and the transmitted light, and which exhibits reflectivity of 50% with respect to the maximum reflectivity, and the half-reflecting average wavelength is an average of half-reflecting wavelengths in the surface. The optical element has a laminate of the polarizing element and an absorption type polarizing plate. The polarized light supply unit has a surface light source provided with a reflection layer, and either one of the polarizing element and the optical element disposed above the surface light source. The liquid-crystal cells are disposed on the light output side of the polarized light supply unit.