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:
Oct. 19, 2010
Filed:
Jan. 24, 2008
Daisuke Kajita, Hitachi, JP;
Ikuo Hiyama, Hitachinaka, JP;
Shintaro Takeda, Hitachi, JP;
Hitachi Displays, Ltd., Chiba, JP;
Abstract
A liquid crystal display device comprises: a first substrate having a first polarization layer on a light incident side; a second substrate having a second polarization layer on a light outgoing side; a liquid crystal layer disposed between the first and the second substrates; a first birefringent film disposed between the first and the second polarization layers; a second birefringent film disposed between the first birefringent film and the second polarization layer; and wherein the liquid crystal layer has a property that a refractive index anisotropy is induced in it by an electric field applied between the pixel electrodes and the common electrode; wherein in-plane retarded phase axes of the first and the second birefringent films form an angle of from 88 degrees to 92 degrees with the first polarization layer; wherein the first birefringent films have Nz coefficients greater than 0.5 and smaller than 0.5, respectively.