Transparent substrate for liquid crystal device and light control sheet
AssigneeToppan Inc.
InventorsYusuke Takahashi, Daisuke Yamashita
Life of this patent
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Abstract
A transparent substrate for a liquid crystal device includes an alignment layer that regulates an alignment direction of liquid crystal molecules contained in a light control layer included in a light control sheet, which is the liquid crystal device, and a base layer on which the alignment layer is formed. The substrate includes a first surface and a second surface opposite to the first surface. The first surface is part of the alignment layer. The second surface is part of the base layer. A surface, which contacts the alignment layer, of the base layer has surface roughness Ra1 of 20 nm or less in a pencil hardness test. A sum Ra1+Ra2 of the surface roughness Ra1 and surface roughness Ra2 of the second surface is 5 nm or more.
Claims20
A transparent substrate for a liquid crystal device, comprising:
- a base layer;
- and
- an alignment layer formed on the base layer such that the alignment layer has a surface forming a first surface of the transparent substrate and that the base layer has a surface forming a second surface of the transparent substrate on an opposite side with respect to the first surface,
- wherein the alignment layer regulates an alignment direction of liquid crystal molecules in a liquid crystal layer in the liquid crystal device, the base layer has a surface that is in contact with the alignment layer such that the surface in contact with the alignment layer has hardness of F or more in a pencil hardness test, and the first surface of the transparent substrate has a surface roughness Ra1 of 20 nm or less such that a sum Ra1+Ra2 of the surface roughness Ra1 of the first surface and surface roughness Ra2 of the second surface is 5 nm or more.
Dependencies are inferred from the claim text.