Multi-layer sheet and liquid crystal display device
AssigneeSharp Kabushiki Kaisha
InventorsNoriko Watanabe, Takashi Sato, Yukihiro Sumida, Junichi Shimaoka
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Abstract
The curable pressure-sensitive adhesive sheet A of this invention comprises an optically transparent substrate on which the curable pressure-sensitive adhesive layer 2 is layered on and integrated therewith. The curable pressure-sensitive adhesive layer 2 comprises a curable pressure-sensitive adhesive composite comprising a cationically-polymerizable compound, a polymer and a photocationic polymerization initiator. Surface roughness Rt of a surface of the curable pressure-sensitive adhesive layer is 2 μm or less.
Claims6
A multi-layer sheet comprising;
- an optically transparent substrate,
- a cured pressure-sensitive adhesive layer formed by hardening a curable pressure-sensitive layer of a curable pressure-sensitive adhesive sheet in which the curable pressure-sensitive adhesive layer is layered on and integrated with a surface of the optically transparent substrate, and
- a light-diffusing sheet having a lens surface;
- a part of a lens element of the lens surface being embedded in a surface of the cured pressure-sensitive adhesive layer,
- wherein the curable pressure-sensitive adhesive layer comprises a curable pressure-sensitive adhesive composite having a cationically-polymerizable compound, a polymer, and a photocationic polymerization initiator, the said curable pressure-sensitive adhesive layer has a surface roughness Rt of 2 μm or less, and a surface of the substrate on which the curable pressure-sensitive adhesive layer is layered, has a surface roughness Rt of 2 μm or less.
A liquid crystal display device comprising;
- a multi-layer sheet including an optically transparent substrate, a cured pressure-sensitive adhesive layer formed by hardening a curable pressure-sensitive layer of a curable pressure-sensitive adhesive sheet in which the curable pressure-sensitive adhesive layer is layered on and integrated with a surface of the optically transparent substrate,
- a light-diffusing sheet having a lens surface;
- a part of a lens element of the lens surface being embedded in a surface of the cured pressure-sensitive adhesive layer,
- a polarizer layered on and integrated with another surface of the substrate in the multi-layer sheet via a pressure-sensitive adhesive layer or an adhesive layer, and
- a liquid crystal display element;
- said display element being layered on and integrated with the multi-layer sheet via the polarizer,
- wherein the curable pressure-sensitive adhesive layer comprises a curable pressure-sensitive adhesive composite having a cationically-polymerizable compound, a polymer, and a photocationic polymerization initiator and the said curable pressure-sensitive adhesive layer has a surface roughness Rt of 2 μm or less.
Dependencies are inferred from the claim text.