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. 06, 2021
Filed:
Feb. 01, 2019
Sony Corporation, Tokyo, JP;
Shintaro Nakano, Kanagawa, JP;
SONY CORPORATION, Tokyo, JP;
Abstract
An optical compensation device used in a liquid crystal display unit of the present invention includes: a first underlayer (A) including a plurality of structures (A) that each includes at least two surfaces having inclination angles different from each other; a first multilayered film (B) provided on the first underlayer (A), and including at least two refractive index films (and,) that are alternately stacked and have refractive indices different from each other: a second underlayer (C) including a plurality of structures (C) that each includes at least two surfaces having inclination angles different from each other, and being opposed to the first underlayer (A) with the first multilayered film (B) interposed therebetween; and a second multilayered film (D) provided on the second underlayer (C), and including at least two refractive index films (and) that are alternately stacked and have refractive indices different from each other, and an array pitch of the plurality of the structures (AorC) in each of the first underlayer (A) and the second underlayer (C) is smaller than a wavelength of visible light.