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:
Dec. 12, 2023
Filed:
Mar. 18, 2022
Fujifilm Corporation, Tokyo, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
Provided is an optical film that has a thin thickness, is suitable in terms of continuous productivity, and exhibits suppressed tinting of black color in a front direction and an oblique direction in a case of being used as a circularly polarizing plate in an organic EL display device; a circularly polarizing plate; and an organic EL display device. The optical film includes an elongated support and a first, a second, and a third optically anisotropic layer in this order, in which a thickness of the elongated support is 10 to 45 μm, the first optically anisotropic layer is formed of a rod-like liquid crystal compound, the second optically anisotropic layer is formed by fixing a twist-aligned liquid crystal compound having a helical axis in a thickness direction, the third optically anisotropic layer is formed of a liquid crystal compound, and each optically anisotropic layer exhibits predetermined optical characteristics.