Nitto-denko Corporation

Nippon Shokubai Co., Ltd.

Tsuyoshi Chiba

Tomotake Nashiki

Hideo Sugawara

Hiroaki Kishioka

Shunsuke Shutou

Tomohide Banba

Masahiro Ooura

Naoki Takahashi

Takashi Yamaoka

Ikuo Kawamoto

Kuniaki Ishibashi

Masakuni Fujita

Kazuhiro Nakajima

Akiko Sugino

Hiroyuki Okada

Masayuki Satake

Yuusuke Toyama

Youichirou Sugino

Yoshitsugu Kitamura

Shinichi Inoue

Kazuya Hada

Akiko Ogasawara

Shunsuke Shuto

Kohei Yano

Naoki Tomoguchi

Satoru Kawahara

Hideyuki Yonezawa

Shigeo Otome

Masahiro Hata

Nobuyuki Kozonoi

Daisuke Kajihara

Tsutomu Hani

Yow-Hei Sohgawa

Ken-Ichi Ueda

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&#xd7;10to 1.0&#xd7;10&#x3a9;/&#x25a1;.

Input display device

Provided is an optical unit for a display panel device with a capacitive touch input function. In the optical unit, a touch panel laminate comprises: an optically transparent first substrate layer laminated to one surface of a transparent adhesive layer; a first transparent electrically conductive layer laminated, through a first undercoat layer, to a surface of the first substrate layer on a side opposite to the adhesive layer; an optically transparent second substrate layer laminated to the other surface of the adhesive layer; and a second transparent electrically conductive layer laminated, through a second undercoat layer, to a surface of the second substrate layer on a side opposite side to the adhesive layer.

Display panel device with touch input function, optical unit for said display panel device, and production method for same

A capacitive touch sensor laminate for use in a display panel device includes: a dielectric central substrate structure made of a transparent resin material and formed to have flat surfaces, respectively, on opposite sides thereof; a at least one-layer structured coat layer made of a transparent material, formed on each of the flat surfaces, and including at least one refractive index adjusting layer for suppressing visibility of an electrode pattern formed by the transparent electrically conductive layer; and a transparent electrically conductive layer formed on and in adjacent relation to the coat layer. The at least one-layer structured coat layers formed on respective ones of the flat surfaces are configured such that thicknesses of corresponding layers therein on respective opposite sides of the dielectric central substrate structure are set to allow the corresponding layers to become mutually symmetrical across the dielectric central substrate structure.

Capacitive touch sensor laminate for display panel device

A film sensor includes a polarizing film, an antistatic layer and a capacitive sensor that are laminated in this order, the capacitive sensor having a transparent film, a transparent electrode pattern formed on one side of the transparent film, and an adhesive layer formed on the one side of the transparent film to embed the transparent electrode pattern. The transparent film is disposed between the antistatic layer and the transparent electrode pattern. The antistatic layer has a surface resistance value of 1.0&#xd7;10to 1.0&#xd7;10&#x3a9;/&#x25a1;.

Film sensor

A display panel device has a window, a touch panel laminate and a display panel. The touch panel laminate has: a transparent first substrate layer; a first transparent conductive layer laminated to the first substrate layer through a first undercoat layer; a transparent second substrate layer; and a second transparent conductive layer laminated to the second substrate layer through a second undercoat layer. The second conductive layer faces the first conductive layer through at least the first substrate layer and the first undercoat layer. The first conductive layer is closer to the window than the first substrate layer. A polarizing film layer is bonded to the window, and a &#x3bb;/4 retardation film layer is disposed between the polarizing film layer and the touch panel laminate. The display panel is disposed on a side opposite to the window with respect to the touch panel laminate.

Display panel device having touch input function

Provided are a polarizer protective film containing a (meth)acrylic resin as a main component and being excellent in adhesion with a polarizer, a polarizing plate including the polarizer protective film and a polarizer which are unlikely to peel off from each other, and an image display apparatus of high quality using the polarizing plate. The polarizer protective film of the present invention includes a coating layer containing a (meth)acrylic resin (B) as a main component on at least one surface of a film containing a (meth)acrylic resin (A) as a main component.

Polarizer protective film, polarizing plate, and image display apparatus

A pressure-sensitive adhesive optical film of the present invention comprises: an optical film comprising a transparent base film and a discotic liquid crystal layer on one side of the transparent base film; and a pressure-sensitive adhesive layer that is provided on the discotic liquid crystal layer, wherein the pressure-sensitive adhesive layer is made from a pressure-sensitive adhesive containing an acrylic polymer comprising an alkyl(meth)acrylate (a1) and a ring structure-containing (meth)acrylate (a2) as monomer units and having a weight average molecular weight of 1,000,000 to 3,000,000, and a crosslinking agent. The pressure-sensitive adhesive optical film has durability and can be prevented from causing display unevenness in a peripheral portion of a display screen.

Pressure-sensitive adhesive optical film and image display

An optical compensation layer-attached polarizing plate including a polarizing plate, an optical compensation layer and another optical compensation layer that are laminated in this order, wherein the optical compensation layer has the relation nx&#x3e;ny=nz, including a resin with a photoelastic coefficient absolute value of at most 2.0&#xd7;10m/N, and has an in-plane retardation (nx&#x2212;ny)din the range of 200 nm to 300 nm, the optical compensation layer has the relation nx&#x3e;ny&#x3e;nz, including a resin with a photoelastic coefficient absolute value of at most 2.0&#xd7;10m/N, and has an in-plane retardation (nx&#x2212;ny)din the range of 90 nm to 160 nm, a slow axis of the optical compensation layer makes an angle of 10&#xb0; to 30&#xb0; with an absorption axis of the polarizing plate, and a slow axis of the optical compensation layer makes an angle of 75&#xb0; to 95&#xb0; with the absorption axis of the polarizing plate.

Optical compensation layer-attached polarizing plate, liquid crystal panel, liquid crystal display, image display, and method for producing optical compensation layer-attached polarizing plate

There is provide a polarizing plate provided with optical compensation layers capable of performing viewing angle compensation with respect to a liquid crystal cell, providing broadband circular polarization, contributing to thickness reduction, preventing uneven display due to heat, and favorably preventing light leak in black display, and an image display apparatus using the same. The polarizing plate provided with optical compensation layers of the present invention includes a polarizer, a first optical compensation layer, and a second optical compensation layer in the stated order, wherein: the first optical compensation layer contains a resin having an absolute value of photoelastic coefficient of 2&#xd7;10m/N or less, and has a relationship of nx&#x3e;ny=nz and an in-plane retardation Reof 100 to 170 nm; the second optical compensation layer has a relationship of nx=ny&#x3e;nz, an in-plane retardation Reof 0 to 50 nm, and a thickness direction retardation Rthof 30 to 400 nm; and an absorption axis of the polarizer and a slow axis of the first optical compensation layer form an angle of 25&#xb0; to 65&#xb0;.

Polarizing plate provided with optical compensation layers and image display apparatus using the same

A polarizing plate with optical compensation layers that performs a wide viewing angle compensation with respect to a liquid crystal cell, allows circularly polarized light to be obtained over a wide range of light wavelengths, contributes to the reduction in thickness, prevents thermal irregularity from occurring, and can effectively prevent light leakage from occurring in a black display. The polarizing plate includes a polarizer, a first optical compensation layer, and a second optical compensation layer that are stacked together in this order. The first optical compensation layer is formed of a liquid crystal compound and has a relationship of nx&#x3e;ny=nz and an in-plane retardation Reof 100 to 170 nm. The second optical compensation layer has a relationship of nx=ny&#x3e;nz and a thickness direction retardation Rthof 30 to 400 nm. The angle formed between the absorption axis of the polarizer and the slow axis of the first optical compensation layer is in the range of 'plus' or 'minus' 25 to 65 degrees.

Polarizing plate with optical compensation layer, method of producing the same, and liquid crystal panel, liquid crystal display, and image display including the same

To provide a polarizing plate provided with optical compensation layers capable of contributing to thickness reduction, preventing uneven display due to heat, and favorably preventing light leak in black display, and an image display apparatus using the same. The polarizing plate provided with optical compensation layers of the present invention includes a polarizer, a first optical compensation layer, a second optical compensation layer, and a third optical compensation layer in the stated order. The first optical compensation layer, the second optical compensation layer, and the third optical compensation layer each have predetermined absolute value of photoelastic coefficient, refractive index profile, and in-plane retardation and/or thickness direction retardation. An absorption axis of the polarizer and a slow axis of the first optical compensation layer form an angle of 10&#xb0; to 30&#xb0;. The absorption axis of the polarizer and a slow axis of the second optical compensation layer form an angle of 70&#xb0; to 95&#xb0;. The absorption axis of the polarizer and a slow axis of the third optical compensation layer form an angle of 70&#xb0;to 95&#xb0;.

Growing community of inventors

Ibaraki, Japan

Tsuyoshi Chiba