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:
Nov. 29, 2005
Filed:
Dec. 21, 1999
Minoru Miyatake, Osaka, JP;
Takafumi Sakuramoto, Osaka, JP;
Minoru Miyatake, Osaka, JP;
Takafumi Sakuramoto, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
An optical element of the present invention is constituted by a multilayer structure having a polarizing plate, and a light diffusing plate. The light diffusing plate is formed of a birefringent film containing dispersed therein minute regions differing from the birefringent film in birefringent characteristics. The minute regions are formed of a thermoplastic liquid-crystal polymer. The difference in refractive index between the birefringent film and the minute regions in a direction perpendicular to the axis direction in which a linearly polarized light has a maximum transmittance, Δn, is 0.03 or larger and that in said axis direction, Δn, is not larger than 80% of the Δn. Furthermore, the Δndirection for the light diffusing plate is parallel to the transmission axis of the polarizing plate. A liquid-crystal display of the present invention has a liquid-crystal cell and the optical element disposed on one or each side of the cell.