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. 07, 2004
Filed:
Jul. 23, 2002
Tetsushi Tanada, Fukushima-ken, JP;
Mitsuo Ohizumi, Fukushima-ken, JP;
Mitsuru Kano, Fukushima-ken, JP;
ALPS Electric Co., Ltd., Tokyo, JP;
Abstract
A liquid crystal display device has a pair of transparent substrates facing each other with a liquid crystal layer therebetween. First and second phase difference plates and a first polarizing plate are formed sequentially on one of the transparent substrates, while a reflector, a third phase difference plate, and a second polarizing plate are formed sequentially on the other of the transparent substrates. The reflector is a metal reflection film on a base material with concave portions formed thereon. The metal reflection film includes a plurality of concave surfaces corresponding to the concave portions that face the transparent substrate. The thickness of the metal reflection film is within the range of 5 to 50 nm.