Nitto-denko Corporation

Nhk Spring Co., Ltd.

Nitto Denki Corporation

Nitto Denko Corproation

Seiji Umemoto

Toshihiko Ariyoshi

Takuya Nakazono

Shuuji Yano

Satoshi Hirata

Kentarou Takeda

Takao Suzuki

Kazuya Hada

Hideo Abe

Seiji Kondo

Yuuki Nakano

Ryoji Kinoshita

Yuu Sugimoto

Akinori Izaki

Naoki Takahashi

Katsunori Takada

Yoshitsugu Kitamura

Ikuo Kawamoto

Keisuke Kimura

Fumihito Shimanoe

Eiko Suefusa

Kiichi Shimodaira

Shuji Yano

Mitsuru Suzuki

Hiroyuki Yoshimi

Tadayuki Kameyama

Kazutaka Hara

Yutaka Ohmori

Hiroaki Kishioka

Junichi Nagase

Michie Sakamoto

Takahisa Konishi

Tomohito Takita

Shouji Yamamoto

Hideyuki Yonezawa

Waka Sakaitani

Yuuki Yano

Tetsushi Kunitake

Teruaki Oosawa

Bin Fang

Takashi Kamijou

Minoru Miyatake

Hiroyuki Kondo

Takashi Kamijo

Takahiro Fukuoka

Hideo Sugawara

Itsuo Takeuchi

Tomonori Noguchi

Yoshimasa Sakata

Hideyuki Usui

Hitoshi Takahira

Masahiro Yaegashi

Tatsuki Nagatsuka

Miki Shiraogawa

Yuuji Saiki

Kouji Kimura

Masakuni Fujita

Masayuki Kawai

Tokio Sakauchi

Tohru Ida

Hidehiko Andou

Seiji Kondou

Nobuyoshi Yagi

Yasuo Fujimura

Suguru Yamamoto

Shuusaku Nakano

Tatsuya Osuka

Michihito Ooishi

Kazumasa Shibata

Ichiro Amino

Junzou Miyazaki

Toshihiro Ariyoshi

Ryota Hatsuda

Kazuhito Kouno

Tishihiko Ariyoshi

There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a cover sheet arranged on a viewer side of the liquid crystal cell, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; and a second polarizer arranged on a viewer side of the cover sheet to cover the transmission portion, wherein an absorption axis direction of the first polarizer and an absorption axis direction of the second polarizer are substantially perpendicular to each other.

Liquid crystal display apparatus

There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a second polarizer arranged on a viewer side of the liquid crystal cell; a cover sheet arranged on a viewer side of the second polarizer, the cover sheet having an opening portion at a position corresponding to a display region of the liquid crystal cell; and a third polarizer arranged on a viewer side of the cover sheet to cover the opening portion, wherein the opening portion of the cover sheet is filled with a pressure-sensitive adhesive.

A liquid crystal display apparatus includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a second polarizer arranged on a viewer side of the liquid crystal cell; a cover sheet arranged on a viewer side of the second polarizer, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; a first optical compensation layer arranged on a viewer side of the cover sheet, the first optical compensation layer having an Re(550) of from 100 nm to 180 nm; and a third polarizer arranged on a viewer side of the first optical compensation layer, wherein an angle formed by a slow axis direction of the first optical compensation layer and an absorption axis direction of the third polarizer is from 35&#xb0; to 55&#xb0; or from 125&#xb0; to 145&#xb0;.

The pressure-sensitive adhesive composition of the invention includes a base polymer; and amphiphilic molecule particles that have an aggregate structure of amphiphilic molecules having hydrophilic group and hydrophobic group in the same molecule. The pressure-sensitive adhesive has stable adhesive characteristics and can be reduced in adhesive strength in a desired manner depending on how it is to be used.

Pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, pressure-sensitive adhesive member and image display, and method for peeling off optical film from an image display and method for removing display panel from image display

Provided are a cutting information determination method that can use a simpler process to improve yield, and a strip-shaped polarizing sheet manufacturing method using such a method, an optical display unit manufacturing method using such a method, a strip-shaped polarizing sheet, and a polarizing sheet material. A cutting position in the width direction A2, in which a polarizing sheet material MP is to be cut along its longitudinal direction A1, is determined based on the numbers of defects counted with respect to plural points in the width direction A2 of the polarizing sheet material MP. This makes it possible to determine the cutting position in such a way that a region with many defects does not fall within the cut width, so that a higher-yield cutting position can be determined. The cutting position can also be determined using a simple process in which defects are counted with respect to plural points in the width direction A2.

Strip-shaped polarizing sheet and polarizing sheet material

An object of the invention is to provide a method for manufacturing an optical display panel. The method includes a feeding step including feeding an optical cell with a thickness of 0.2 mm to 1.0 mm by means of a feed roller unit arranged perpendicular to a direction in which the optical cell is fed; a bonding step including feeding a long carrier film from a continuous roll and bonding a sheet piece of the optical film to a lower surface of the optical cell with the pressure-sensitive adhesive interposed therebetween, wherein the lower surface is on a side in contact with the feed roller unit; and a rotation step including rotating the optical cell by 90&#xb0; with respect to the direction in which the optical cell is fed which is bonded in the bonding step.

Optical display panel production method and optical display panel production system

Provided are a system and a method for manufacturing an optical display device and a material roll, which can effectively prevent the production of defective optical display devices even in a process including drawing a long sheet material from a material roll and bonding an optical film to an optical display unit, and which is a roll of a laminate of a first base film, a first pressure-sensitive adhesive layer, an optical film, a second pressure-sensitive adhesive layer, and a second base film, which are wound in the roll in this order from the outside, and has a width corresponding to the length of any one side of a rectangular optical display unit, wherein the adhering strength A of the first base film-side interface of the first pressure-sensitive adhesive layer, the adhering strength B of the optical film-side interface of the first pressure-sensitive adhesive layer, the adhering strength C of the optical film-side interface of the second pressure-sensitive adhesive layer, and the adhering strength D of the second base film-side interface of the second pressure-sensitive adhesive layer satisfy the relations A&#x3c;B and A&#x3c;C&#x3c;D.

Material roll and system and method for manufacturing optical display device

Manufacturing method is for manufacturing an optical display panel including an optical cell and a pressure-sensitive adhesive layer-carrying optical film provided thereon with the pressure-sensitive adhesive layer interposed therebetween, which includes the steps of unwinding a multilayer optical film from a roll, feeding the multilayer optical film, feeding an optical cell, peeling off the optical film from a carrier film, and bonding the optical film to one side of the optical cell with a pressure-sensitive adhesive interposed therebetween, wherein the longitudinal length (L) of the carrier film between a position at which the multilayer optical film begins to be unwound in the film feeding step and a position at which peeling is started in the peeling step is 15 times or more the width (W) of the carrier film.

Method and system for manufacturing optical display panel

A roll of a continuous web of an optical film laminate with predefined slit lines for use in a continuous manufacturing system by laminating optically functional film sheets to liquid-crystal panels. The optical film laminate with predefined slit lines comprises an optically functional film having an adhesive layer which is subjected to a preliminary inspection, and a carrier film releasably laminated to the adhesive layer. Defect-free normal sheets and defective or defect-containing sheets having predefined length corresponding to the dimension of the liquid-crystal panel are formed on the carrier film by sequentially forming slit lines along the transverse direction with respect to the lengthwise direction of the optical film laminate.

Roll of continuous web of optical film laminate with predefined slit lines, and method and system for manufacturing the same

An objective of the present invention is to alleviate streaky display unevenness that occurs in liquid crystal display elements when feeding optical function film from a continuous roll having score lines in the width direction thereof and bonding the optical function film on a liquid crystal panel. A continuous roll comprises an optical film laminate () that is in the form of a continuous web wound into a roll and comprises at least an optical function film () and a carrier film () releasably placed on the optical function film (). The optical function film () is divided into a plurality of cut pieces by score lines () formed along a widthwise direction of the optical film laminate (). It is possible to resolve the problem by making the bending rigidity per unit longitudinal length of the optical function film fall within a specific range.

Continuous roll of optical function film, method of manufacture of liquid crystal display element employing same, and optical function film laminating device

There are provided a viewing angle controlling system which can be used in a display device for which peep-prevention and viewing-angle-control are required, and makes it possible to control the viewing angle of a display, and an image display device using the same. The viewing angle controlling system includes: a first polarizer and a second polarizer which are each in the form of a film comprising an absorption dichroic material. The first polarizer has an absorption axis in its film plane, and the second polarizer has an absorption axis in the range of angle from 0 to 45&#xb0; to the normal line of its film plane.

Viewing angle controlling system, and image display device using the same

Disclosed is a material roll that includes a roll of an optical film having defect information markings printed thereon and is resistant to the formation of a defect by the transfer of a bump/dent deformation at the marking site. The material roll includes a long sheet of an optical film with polarizer wound into roll shape; and marking(s) formed at or in a vicinity of at least one defect site. The marking has an optical density of 1.5 or more, and a thickness of a center part of the marking is 1.5 &#x3bc;m or less. The marking preferably has an optical density per unit thickness of 2.5 &#x3bc;mor more.

Optical film material roll and method for manufacturing image display device using thereof

A method for manufacturing a liquid crystal display device by feeding carrier films from continuous rolls, respectively, and by bonding optical films, which are being peeled off or have been peeled off from the carrier films, respectively, to first and second panel surfaces of a liquid crystal panel, respectively, with a pressure-sensitive adhesive interposed therebetween so that the liquid crystal display device is obtained. The method includes: a first bonding step including bonding a first optical film to the first panel surface; a rotation step including rotating the liquid crystal panel; a second bonding step including bonding a second optical film to the first optical film; and a third bonding step including bonding a third optical film to the second panel surface of the liquid crystal panel.

Method and system for manufacturing liquid crystal display device

The method for manufacturing a liquid crystal display device includes carrier film feeding steps including feeding long carrier films from continuous rolls, respectively; peeling steps including folding back each of the carrier films at a front end part placed on a carrier film feed path so that the optical films are peeled off from the carrier films, respectively; and bonding steps including bonding the optical films to the viewer side and back side of a liquid crystal panel, wherein in the bonding steps, the optical films are bonded to the liquid crystal panel in such a manner that the number of times the optical film is bonded to the back side of the liquid crystal panel is greater than the number of times the optical film is bonded to the viewer side of the liquid crystal panel.

Growing community of inventors

Ibaraki, Japan

Seiji Umemoto