Fujifilm Corporation

Toshihiro Konishi

Yuta Takahashi

Shinpei Yoshida

Ryo Satake

Hiroki Kuwahara

Taro Hashizume

Kenta Yamazaki

Chie Moriya

Yusuke Furuki

Toshikazu Sumi

Hiroyuki Okusa

Provided is a bendable organic EL display device in which change in tint at a bending portion before and after bending is small. The organic electroluminescent display device is a bendable organic electroluminescent display device including a circularly polarizing plate and a bendable organic EL display panel, in which the circularly polarizing plate includes a polarizer and a retardation layer from a viewing side, the retardation layer includes a first optically anisotropic layer formed by fixing a liquid crystal compound twist-aligned along a helical axis extending in a thickness direction, and the first optically anisotropic layer satisfies a predetermined requirement.

Organic electroluminescent display device which is bendable

Provided are a liquid crystal composition, a liquid crystal cured layer, an optical film, a polarizing plate, and an image display device, each of which suppresses streak defects and has excellent temporal stability. The liquid crystal composition includes a liquid crystal compound and a basic compound, in which a pKa of a conjugate acid of the basic compound is 4 to 10.

Liquid crystal composition, liquid crystal cured layer, optical film, polarizing plate, and image display device

Provided are a phase difference film that has a small change in tint in a case where the phase difference film is combined with a polarizer and then applied as a circularly polarizing plate to a display device, and the display device is observed from an oblique direction at all azimuthal angles; as well as a circularly polarizing plate and a display device. The phase difference film includes a first optically anisotropic layer, a second optically anisotropic layer, a third optically anisotropic layer, and a fourth optically anisotropic layer in this order, in which the first optically anisotropic layer is a C-plate, the second optically anisotropic layer is an A-plate, the third optically anisotropic layer is a layer formed by fixing a liquid crystal compound twist-aligned along a helical axis extending in a thickness direction, and the first, second, third, and fourth optically anisotropic layers have a predetermined configuration.

Phase difference film, circularly polarizing plate, and display device

An organic EL display device is provided in which a change in tint is reduced in a bent portion. This organic EL display device is an organic electroluminescent display device including, from a viewing side, a circularly polarizing plate, a first adhesion layer, and a bendable organic electroluminescent display panel, in which the circularly polarizing plate includes, from the viewing side, a linear polarizer, a second adhesion layer, and a phase difference layer functioning as a &#x3bb;/4 plate, a complex modulus of elasticity of the first adhesion layer is 2.50&#xd7;10Pa or less, the first adhesion layer is thicker than the second adhesion layer, and an absorption axis of the linear polarizer is positioned at an angle of 0&#xb0;&#xb1;30&#xb0; or 90&#xb0;&#xb1;30&#xb0; with respect to an extension direction of a ridge line formed in a case where the organic electroluminescent display device is bent.

Organic electroluminescent display device

Growing community of inventors

Kanagawa, Japan

Toshihiro Konishi