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:
Jul. 16, 2019
Filed:
Aug. 08, 2014
Sumitomo Chemical Company, Limited, Chuo-ku, Tokyo, JP;
Tadahiro Kobayashi, Osaka, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
Laminated body including a substrate and an optically anisotropic layer. This layer satisfies the following expressions (1), (2), and (3): Δn(450)/Δn(550)≤1.00 (1), and 1.00≤Δn(650)/Δn(550) (2) wherein Δn(450), Δn(550) and Δn(650) represent the respective birefringences of the layer that are derived from retardation values of the laminated body that are obtained by measuring the laminated body at wavelengths of 450 nm, 550 nm and 650 nm in the state of inclining the fast axis of the layer at an angle of 50 degrees to act as an inclined central axis; and n>n≅n(3) wherein nand nrepresent the respective refractive indexes of the substrate in directions parallel with the plane of the substrate, these directions being orthogonal to each other, and nrepresents the refractive index of the substrate in a direction orthogonal to each of the directions about nand n.