Input display device

Patent metadata

Field	Value
Publication number	US-9916048-B2
Application number	US-201213677780-A
Country	US
Kind code	B2
Filing date	Nov 15, 2012
Priority date	Nov 16, 2011
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

An input display device includes a liquid crystal layer containing liquid crystal molecules that are homogeneously aligned in an absence of an electric field, a first polarizer disposed on a viewing side of the liquid crystal layer, a capacitive sensor disposed between the first polarizer and the liquid crystal layer, and an antistatic layer disposed between the first polarizer and the capacitive sensor, the antistatic layer being attached to the first polarizer. The capacitive sensor has a transparent substrate, a transparent electrode pattern formed on the transparent substrate, and a first adhesive layer formed on the transparent substrate to embed the transparent electrode pattern, and the antistatic layer has a surface resistance value of 1.0×10 9 to 1.0×10 11 Ω/□.

First claim

What is claimed is:

1. An input display device comprising:
a liquid crystal layer containing liquid crystal molecules that are homogeneously aligned in an absence of an electric field;
a first polarizer disposed on a viewing side of the liquid crystal layer;
a capacitive sensor disposed between the first polarizer and the liquid crystal layer; and
an antistatic layer disposed between the first polarizer and the capacitive sensor, the antistatic layer being attached to the first polarizer,
the first polarizer, the antistatic layer, the capacitive sensor and the liquid crystal layer being laminated in this order from the viewing side,
wherein the capacitive sensor has a transparent substrate, a transparent electrode pattern formed on the transparent substrate, and a first adhesive layer formed on the transparent substrate to embed the transparent electrode pattern, and
wherein the antistatic layer has a surface resistance value of 1.0×10 9 to 1.0×10 11 Ω/□.

2. The input display device according to claim 1 , further comprising a retardation film that widens a viewing angle on the viewing side, the retardation film being disposed between the antistatic layer and the first adhesive layer.

3. The input display device according to claim 1 , wherein a second polarizer is disposed on a side of the liquid crystal layer opposite to the viewing side via a second adhesive layer.

4. The input display device according to claim 1 , wherein the antistatic layer includes any one of a surface active agent, an alkaline metal salt, a polyhydric alcohol, a conductive fine particle and a conductive polymer.

5. The input display device according to claim 4 , wherein the alkaline metal salt is bis(trifluoroalkanesulfonyl)imide alkaline metal salt.

Assignees

• Nitto Denko Corp

Inventors

• Ishibashi Kuniaki
• Sugino Akiko
• Chiba Tsuyoshi
• Fujita Masakuni
• Yamaoka Takashi

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02F2202/22

  Antistatic materials or arrangements · CPC title

• G02F2001/133738

  Physics · mapped topic

• G02F1/13338 Primary

  Input devices, e.g. touch panels · CPC title