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:
Feb. 03, 2004
Filed:
Oct. 17, 2001
Applicant:
Inventors:
Tetsushi Tanada, Fukushima-ken, JP;
Mitsuo Ohizumi, Fukushima-ken, JP;
Mitsuru Kano, Fukushima-ken, JP;
Assignee:
Alps Electric, Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/1335 ;
U.S. Cl.
CPC ...
G02F 1/1335 ;
Abstract
A reflection type liquid crystal display device has phase difference plates and a polarizer provided on an outer side of a liquid crystal cell. The liquid crystal layer is twisted by 240 to 250 degrees with other characteristics including: &Dgr;nd for the crystal cell of 600 nm-800 nm, &Dgr;nd for the first phase difference plate of 100 nm-200 nm, and the lagging axis &ggr; of 60 to 100 degrees, &Dgr;nd for the second phase difference plate of 300 nm-500 nm and a lagging axis &agr; of 90 to 140 degrees, and an absorption axis &agr; of the polarizer of 20 to 70 degrees or 110 to 160 degrees.