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:
Feb. 26, 2019
Filed:
Jan. 14, 2016
Fujifilm Corporation, Tokyo, JP;
Jun Takeda, Kanagawa, JP;
Shunya Katoh, Kanagawa, JP;
Michio Nagai, Kanagawa, JP;
Yoji Ito, Kanagawa, JP;
Masaya Suzuki, Kanagawa, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A liquid crystal (LC) display device uses a phase difference film which increases front contrast of the device, and a polarization plate. The film includes a first optical anisotropic layer, and a second optical anisotropic layer thereon, the first layer formed by fixing an LC compound in a homogeneous alignment state, has an order parameter (OP) of 0.75 to 0.95, and layer thickness of 0.3 μm to 3.0 μm, the second layer formed by fixing an LC compound in a homeotropic alignment state, has an OP of 0.60 to 0.95, and layer thickness of 0.3 μm to 3.0 μm, the OP which is denoted by OP=(A−A⊥)/(2A⊥+A), 'A' which represents absorbance of the LC compound regarding light polarized parallel to an alignment direction, and 'A⊥' which represents absorbance of the LC compound regarding light polarized vertical to the alignment direction.