Nitto-denko Corporation

Nitto Denko Cororation

Nitto Denko Corproation

Kentarou Takeda

Naoki Takahashi

Nao Murakami

Hiroyuki Yoshimi

Kazutaka Hara

Miki Shiraogawa

Seiji Umemoto

Junichi Nagase

Takashi Shimizu

Mitsuru Suzuki

Shouji Yamamoto

Hironori Yaginuma

Minoru Miyatake

Takeharu Kitagawa

Takahiro Fukuoka

Kazuki Uwada

Takuya Nakazono

Toshiyuki Iida

Akinori Izaki

Tomohito Takita

Yoshiyuki Kiya

Michihito Ooishi

Masaki Hayashi

Tadayuki Kameyama

Tomokazu Yura

Kazuo Kitada

Satoru Koshio

Hideki Ishida

Katsunori Takada

Atsushi Kishi

Satoshi Hirata

Yuu Sugimoto

Tadashi Kojima

Takami Hikita

Ikuo Kawamoto

Hiroki Kuramoto

Daisuke Hayashi

Tomonori Ueno

Tatsuki Nagatsuka

Hiroaki Sawada

Kentarou Yoshida

Taku Yamada

Takuya Mori

Hiroshi Sumimura

Tadatoshi Nakanishi

Kanto Kobayashi

Yuki Hasegawa

Hin Hou

Miki Okamoto

Ayaka Umemoto

Kouzou Nakamura

A polarizing plate with retardation layers of the present invention includes a polarizer, a first retardation layer, and a second retardation layer in the staled order. The polarizer and the lust retardation layer are bonded to each other via a first adhesive layer, the first retardation layer and the second retardation layer are bonded to each other via a second adhesive layer, the first retardation layer and the second retardation layer each have a thickness of 5 &#x3bc;m or less, and the second adhesive layer has an average refractive index of 1.55 or more, and a difference between the average refractive index of the second adhesive layer and an average refractive index of the first retardation layer, and a difference between the average refractive index of the second adhesive layer and an average refractive index of the second retardation layer are each less than 0.08.

Polarizing plate with phase difference layers, and organic EL display device

There is provided a circularly polarizing plate for an organic EL display apparatus that is excellent in productivity, is prevented from warping, and can achieve an excellent tint. An elongated circularly polarizing plate for an organic EL display apparatus according to an embodiment of the present invention includes in the following order: an elongated polarizer having an absorption axis in a longitudinal direction thereof; an elongated first retardation layer functioning as a &#x3bb;/2 plate; and an elongated second retardation layer functioning as a &#x3bb;/4 plate. An angle formed between the absorption axis of the elongated polarizer and a slow axis of the elongated first retardation layer is front 15&#xb0; to 30&#xb0;; and the absorption axis of the elongated polarizer and a slow axis of the elongated second retardation layer are substantially perpendicular to each other.

Circular polarizer for organic EL display device having laminated half wavelength plate and quarter wavelength plate, and organic EL display device

There is provided an optical laminate capable of toeing suitably applied even to an organic EL display apparatus that is extremely thin and is bendable or foldable. An optical laminate according to an embodiment of the present invention is used for an organic electroluminescence display apparatus. The optical laminate includes in this order: a surface protective layer; a polarizer; and an optical compensation layer. The surface protective layer is flexible, has a function of substituting for a cover glass for an organic electroluminescence display apparatus, and functions as a protective layer for the polarizer.

Optical laminated body and organic electroluminescence display device using same

There is provided a circularly polarizing plate capable of realizing a bendable display apparatus in which an excellent reflection hue is obtained and a color change due to bending is suppressed. A circularly polarizing plate according to the present invention is used in a bendable display apparatus. The circularly polarizing plate includes: a polarizer; and a retardation film arranged on one side of the polarizer. In-plane retardations of the retardation film satisfy a relationship of Re(450)&#x3c;Re(550)&#x3c;Re(650), and a slow axis direction of the retardation film is adjusted so as to form an angle of from 20&#xb0; to 70&#xb0; with respect to a bending direction of the display apparatus.

Circular polarizing plate and bendable display device

Provided is an image display mirror that includes a half mirror and an image display apparatus, reduces an influence of a reflected image provided by the half mirror, and is excellent in visibility of an image displayed on the image display apparatus. The image display mirror for a vehicle includes: a first polarizing plate; a first liquid crystal cell; a half mirror; and an image display apparatus in the stated order from a viewer side, in which in the first liquid crystal cell, a state in which a polarization direction of incident linearly polarized light is maintained and a state in which the incident linearly polarized light is transformed into circularly polarized light are switched in accordance with a voltage to be supplied.

Image display mirror for a vehicle

There is provided a display apparatus that can suppress the occurrence of a crack in a circularly polarizing plate in its manufacturing process without reducing designability and mass productivity. A display apparatus according to an embodiment of the present invention includes: a display element; and a circularly polarizing plate placed on a viewer side of the display element. The circularly polarizing plate includes a polarizer and a retardation film. In-plane retardations of the retardation film satisfy a relationship represented by the below-indicated expression (1); and an angle &#x3b8;1 formed between a slow axis of the retardation film and a direction in which a wiring crimping portion provided along at least one side of a peripheral edge portion of the display element extends satisfies a relationship represented by the below-indicated expression (2):(450)&#x3c;(550)&#x2003;&#x2003;(1)&#x3b8;1&#x2266;70&#xb0;&#x2003;&#x2003;(2)where Re(450) and Re(550) represent in-plane retardations measured at 23&#xb0; C., and at wavelengths of 450 nm and 550 nm, respectively.

Display device and method for manufacturing same

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

The invention relates a long laminated polarizing plate (PL) comprising at least one reflective linear polarizer (Pr) having a transmission axis parallel to the longitudinal direction of the film, and at least one absorptive polarizer (Pa) having a transmission axis parallel to the longitudinal direction. In this long laminated polarizing plate (PL), the reflective linear polarizer (Pr) and the absorptive polarizer (Pa) are arranged such that their transmission axes are parallel to each other. The long laminated polarizing plate of the invention is excellent in productivity and is applicable to a large-sized liquid crystal display.

Laminated polarizing plate, method for production thereof and liquid crystal display

Adhesive composition according to the present invention includes an adhesive base agent consisting of a monomer and a polymerization initiator. Adhesion of the adhesive composition changes to take local maximum value, minimum value and a value greater than the local maximum value along with increase of irradiation amount of the electromagnetic wave or particle beam irradiated to the adhesive composition under a predetermined temperature environment. In a method for manufacturing a laminate according to the present invention allows for easy peeling of adherends and a layer of the adhesive composition when adhesion of the adhesive composition takes the minimum value.

Adhesive composition and method for manufacturing a laminate using the adhesive composition

Provided is a polarizing plate that has an excellent viewing angle characteristic and suppresses changes in display characteristics. A polarizing plate of the present invention is used in an organic EL panel, and includes a polarizer (), a first retardation layer (), and a second retardation layer (). The first retardation layer () shows a refractive index characteristic of nx&#x3e;ny&#x2267;nz, satisfies a relationship of Re(450)&#x3c;Re(550), and has a water absorption rate of 3% or less. The second retardation layer () shows a refractive index characteristic of nz&#x3e;nx&#x2267;ny. A laminate of the first retardation layer () and the second retardation layer () has an Re(550) of from 120 nm to 160 nm and an Rth(550) of from 40 nm to 100 nm.

Polarizing plate and organic EL panel

A material roll including a roll of a continuous sheet material, including an optical member including a polarizer and a release film provided on one side of the optical member with an adhesive interposed therebetween, wherein when no external force is applied, the continuous sheet material curls in the longitudinal direction in such a way that the release film is facing inward, and the continuous sheet material is for use in a process including bonding the optical member to a substrate with the adhesive interposed therebetween to form an optical display unit.

Optical display unit, and sheet material and roll for use therein

Provided are a material roll and a method for manufacturing the material roll in which lifting between base films and an optical film is hardly generated. Provided is a material roll (R), wherein a first base film (F), a first pressure-sensitive adhesive layer (F), an optical film (F), a second pressure-sensitive adhesive layer (F) and a second base film (F) are wounded together in a manner that said layers are laminated in said order from outer side. An adhesive power A of the first pressure-sensitive adhesive layer (F) at an interface on the first base film (F) side, an adhesive power B of the first pressure-sensitive adhesive layer (F) at an interface on the optical film (F) side, an adhesive power C of the second pressure-sensitive adhesive layer (F) at an interface on the optical film (F) side, and an adhesive power D of the second pressure-sensitive adhesive layer (F) at an interface on the second base film (F) side satisfy the relationships A&#x3c;B and A&#x3c;C&#x3c;D. Lifting between base films (F, F) and optical film (F) can be made unlikely to generate by winding the optical film (F) in a manner that the second base film (F), that has greater adhesive power is in an inside.

Material roll and method for manufacturing material roll

Provided is a liquid crystal display in which occurrence of iridescent unevenness is suppressed, even when a film with high level of mechanical properties, chemical resistance and water-barrier properties is used as a polarizer-protective-film. Also, disclosed is a polarizing plate to be used in the liquid crystal display. The liquid crystal display includes a liquid crystal cell, a light source, a first polarizing plate placed between the liquid crystal cell and the light source, and a second polarizing plate placed on a viewer side of the liquid crystal cell. The first polarizing plate includes a polarizer and a first protective film placed on a light source side principal surface of the first protective film, and the first protective film satisfies following relations: (i) 0 nm&#x2266;Re&#x2266;3000 nm; (ii) Nz&#x2267;5; and (iii) Rth&#x3e;2500 nm.

Liquid crystal display device and polarizing plate

A method of easily manufacturing a light diffusion film by a continuous process, which achieves both good display properties and an increase in viewing angle when used in a liquid crystal display. A method of manufacturing a light diffusion film includes forming a laminate of an original light diffusion film and a photosensitive resin, wherein the photosensitive resin includes at least two types of materials that are different in refractive index from each other; and irradiating the laminate with a collimated laser beam from a side of the original light diffusion film, wherein a reflection hologram formation-preventing layer is located on a side of the laminate opposite from the side of irradiation of the laminate with a collimated laser beam. In the process of irradiating the laminate, the reflection hologram formation-preventing layer prevents formation of a reflection hologram on the photosensitive resin due to a reflected light from the irradiation.

Method of manufacturing light diffusion film, light diffusion film, polarizing plate, and liquid crystal display

Growing community of inventors

Ibaraki, Japan

Kentarou Takeda