Toppan Printing Co., Ltd.

Toppan Inc.

Toppan Holdings Inc.

Kaori Morinaga

Masayuki Takahashi

Yuji Yano

Taisuke Enya

A transparent base material for a liquid crystal device includes an alignment layer that regulates orientations of liquid crystal molecules contained in a light control layer included in the liquid crystal device, a flexible base layer on which the alignment layer is formed, and a first surface and a second surface opposite to the first surface. The first surface is located on the alignment layer, the second surface is located on the base layer, the alignment layer includes polyimide, and the first surface has an indentation hardness of 0.25 GPa or higher as measured by a nanoindentation test according to ISO 14577-1:2015.

Transparent base material for liquid crystal device, light control sheet, and light control device

A light control sheet including a first transparent electrode layer, a second transparent electrode layer, a light control layer including a resin layer formed between the first transparent electrode layer and the second transparent electrode layer, the resin layer including voids dispersed therein and filled with a liquid crystal composition including liquid crystal molecules, and a first orientation layer formed between the first transparent electrode layer and the light control layer such that a haze of the light control layer is increased by applying a voltage to the first transparent electrode layer. The light control layer has a first surface in contact with the first orientation layer, and an area ratio of the voids at the first surface is 49% or more where the area ratio is a percentage of a total area of all the voids to an area of the first surface.

Light control sheet

A light control sheet including a light transmissive resin substrate, and a light control layer formed on the light transmissive resin substrate. The light control layer includes a liquid crystal layer and a pair of electrode layers that sandwich the liquid crystal layer. The light transmissive resin substrate includes a light transmissive resin sheet and a surface-treated layer that has a barrier property, the light transmissive resin sheet has a first surface that faces the light control layer and a second surface opposite to the first surface, and the surface-treated layer is formed on at least one of the first surface and the second surface.

Growing community of inventors

Taito-ku, Japan

Kaori Morinaga