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:
Mar. 01, 2011
Filed:
Aug. 15, 2008
Yuka Utsumi, Hitachi, JP;
Shintaro Takeda, Hitachi, JP;
Hiroyuki Kagawa, Hitachinaka, JP;
Daisuke Kajita, Hitachi, JP;
Ikuo Hiyama, Hitachinaka, JP;
Kikuo Ono, Mobara, JP;
Yuka Utsumi, Hitachi, JP;
Shintaro Takeda, Hitachi, JP;
Hiroyuki Kagawa, Hitachinaka, JP;
Daisuke Kajita, Hitachi, JP;
Ikuo Hiyama, Hitachinaka, JP;
Kikuo Ono, Mobara, JP;
Hitachi Displays, Ltd., Chiba-Ken, JP;
Abstract
Disclosed herein is a liquid-crystal display device capable of reducing leakage of light under a black state due to scattering from a liquid-crystal layer, and having high-contrast ratio, excellent image quality performance. The liquid-crystal display device comprises: a liquid-crystal panel including one pair of polarizers disposed on one pair of substrates, a liquid-crystal layer held in sandwiched form between the pair of substrates, and a group of electrodes formed on at least one of the pair of substrates for applying an electric field to the liquid-crystal layer; and a light source unit disposed outside the pair of substrates. The liquid-crystal layer includes a liquid-crystal material having an ordinary-light refractive index of at least 1.46, but up to 1.49, an extraordinary-light refractive index of at least 1.54, but up to 1.59, and a mean photoelastic constant of at least 8, but up to 25, and exhibiting a nematic phase.