Other

Keio University

Enplas Corporation

Dai Nippon Printing Co., Ltd.

Japan Science and Technology Agency

Membrane Technology and Research, Inc

Nitto-denko Corporation

Sekisui Chemical Co., Ltd.

Mitsui Chemicals, Inc.

Japan Aviation Electronics Industry, Limited

Hitachi Chemical Company, Ltd.

Toyo Boseki Kabushiki Kaisha

Toyobo Co., Ltd.

Mitsubishi Pencil Company, Limited

Nittoh Inc.

Yasuhiro Koike

Yoshiyuki Okamoto

Eizaburo Higuchi

Takayuki Arai

Masaki Naritomi

Timothy C Merkel

Zhenjie He

Akihiro Tagaya

Takashi Kuroda

Norihide Sugiyama

Hirotsugu Yoshida

Tazuru Okamoto

Hiroshi Yamamoto

Tsuyoshi Ishikawa

Nao Murakami

Fumihiro Arakawa

Hiroyuki Takemoto

Takehito Fuchida

Tadahiro Sunaga

Takashi Oda

Hidenobu Murofushi

Runa Nakamura

Shouhei Maezawa

Yuki Masabe

Ryosuke Nakao

Hitoshi Suzuki

Kazuaki Yokoyama

Yinzhong Guo

Wei-Hong Liu

Hiroka Inabe

Kayoko Watai

Toshitaka Torikai

Hiromasa Kawai

Takayoshi Yamauchi

Naohiko Moriya

Kana Yamamoto

Hao Zhang

Minoru Suzuki

Keiichi Mochizuki

Akihito Mitsui

Akihiro Yoshida

Takashi Iwamoto

Takeshi Ota

Hirofumi Io

Hiroyuki Muto

Keisuke Kawashima

Akihiro Horibe

Azusa Inoue

Masato Aoyama

Didier Grand-Clement

St&eacute;phane Cabeza

Kazumasa Osumi

Ryo Nihei

Shinya Inoue

There is provided a display device exhibiting a good color reproducibility, even when observed through polarized sunglasses. A display device comprises a polarizer a and an optical film X on a surface on a light emitting surface side of a display element, wherein L, which is the light incident vertically on the optical film X, among light incident on the optical film X from the display element side, satisfies a specific condition, and L, which is the light emitting vertically from the light emitting surface side of the optical film X, and passing through a polarizer b having the absorption axis parallel to the absorption axis of the polarizer a, satisfies a specific condition.

Display device and method for selecting optical film of display device

Provided is an optical fiber cable which allows for high-quality signal transmission in short-distance transmission. The optical fiber cable is designed for use in optical communication based on transmitting an optical beam from a light-emitting device, to a light-receiving device. The optical fiber cable has: a proximal end which is one end thereof on the side of the light-emitting device, and a distal end which is the other end thereof on the side of the light-receiving device, wherein an optical beam returning from the side of the distal end toward the side of the light-emitting device has an Mfactor of 1.7 or more; and a length of 50 m or less.

Optical fiber cable

The present invention provides a liquid crystal display method capable of, when a screen thereof is observed through a polarizer such as sunglasses, ensuring an excellent visibility regardless of the angle of observation. In a liquid crystal display device at least having a backlight light source, a liquid crystal cell, and a polarizer disposed on a viewing side of the liquid crystal cell, a white light-emitting diode is used as the backlight light source; and a polymer film having a retardation of from 3,000 nm to 30,000 nm is used so as to be disposed on the viewing side of the polarizer so that an angle between an absorption axis of the polarizer and a slow axis of the polymer film becomes about 45 degrees.

Method for improving visibility of liquid crystal display device, and liquid crystal display device using the same

There is provided a display device exhibiting a good color reproducibility, even when observed through polarized sunglasses. A display device comprises a display element, and a polarizer a and an optical film X on a surface on a light emitting surface side of the display element, wherein L, which is the light incident vertically on the optical film X, among light incident on the optical film X from the display element side, satisfies a specific condition, and L, which is the light emitting vertically from the light emitting surface side of the optical film X, and passing through a polarizer b having the absorption axis parallel to the absorption axis of the polarizer a, satisfies a specific condition.

Display device, and method for selecting optical film for display device

Method for improving visibility of liquid crystal display device, and liquid crystal display device using same

Disclosed is an optical film having low wavelength dispersibility which is obtained by stretching a film formed of a fluorine-containing cyclic olefin polymer including at least one selected from a repeating structural unit represented by the formula described below, wherein a phase difference at a wavelength of 550 nm is greater than or equal to 50 nm, wavelength dispersibility represented by a ratio Re (400 nm)/Re (550 nm) of a phase difference Re (400 nm) at a wavelength of 400 nm to a phase difference Re (550 nm) at a wavelength of 550 nm is 1.00 to 1.05, wavelength dispersibility represented by a ratio Re (400 nm)/Re (800 nm) of a phase difference Re (400 nm) at a wavelength of 400 nm to a phase difference Re (800 nm) at a wavelength of 800 nm is 1.00 to 1.05, and total light transmittance is greater than or equal to 92%. 

Optical film

Disclosed herein is a process for separating components of a gas mixture using gas-separation copolymer membranes. These membranes use a selective layer made from copolymers of perfluorodioxolane monomers. The resulting membranes have superior selectivity performance for gas pairs of interest while maintaining fast gas permeance compared to membranes prepared using conventional perfluoropolymers, such as Teflon&#xae; AF, Hyflon&#xae; AD, and Cytop&#xae;.

Gas separation membranes based on perfluorinated polymers

Provided is an illumination module capable of preventing a light exit surface from being darker along peripheral edge portions as though having borders. An illumination module () includes: a light guiding plate (), which has an end surface () and a first principal surface (); a light source () configured to emit light that enters the end surface (); and a diffusion plate (), which has alight incident surface () and a light exit surface (). The diffusion plate () includes a protruding part (), which protrudes toward the light guiding plate () side and the light source (), which is positioned so as to face a peripheral edge portion () on the end surface () side of the light guiding plate (), and which has a light incident surface () into which light exiting the peripheral edge portion () enters.

Illumination module

A process for separating components of a gas mixture using gas-separation copolymer membranes. These membranes use a selective layer made from copolymers of partially fluorinated or perfluorinated dioxolane monomers and a second monomer, such as dioxane or a partially fluorinated dioxolane. The resulting membranes have superior selectivity performance for gas pairs of interest while maintaining fast gas permeance compared to membranes prepared using conventional perfluoropolymers, such as Teflon&#xae; AF, Hyflon&#xae; AD, and Cytop&#xae;.

Gas separation membranes based on fluorinated and perfluorinated polymers

A liquid crystal display apparatus includes a liquid crystal display panel including a liquid crystal cell between first second polarizing plates; and a surface light source device. The surface light source device includes a light source unit, a light guide plate for outputting first directivity light having directivity of maximum intensity in a first direction, which forms a predetermined angle from a normal direction of the light output surface in a plane approximately parallel to a light guiding direction of light, and having a high ratio of a polarized light component oscillating in the plane and a prism sheet being configured to convert the first directivity light into second directivity light directed in a second direction within a predetermined angle from the normal direction of the light output surface of the light guide plate while substantially maintaining a polarization state of the first directivity light.

Liquid crystal display apparatus

A liquid crystal display apparatus comprises: a liquid crystal display panel including a liquid crystal cell between a first polarizing plate and a second polarizing plate; and a surface light source device having a light source unit and a light guide plate. In a polarized light output from the light guide plate, when the normal direction of a light output surface is defined to be at a polar angle of 90&#xb0;, and the light guiding direction of the light guide plate is defined to be a direction of an azimuth angle of 0&#xb0;-180&#xb0;, a ratio La/Lt of integrated intensity La of output light in ranges where the polar angle is 50&#xb0; to 80&#xb0; and the azimuth angle is 135&#xb0; to 225&#xb0;, 0&#xb0; to 45&#xb0;, and 315&#xb0; to 360&#xb0; to integrated intensity Lt of total output light is 0.3 or more.

Disclosed is an optical material including a cyclic olefin copolymer containing at least a repeating structural unit [A] represented by the general formula (1) and a repeating structural unit [B] represented by the general formula (2) and having a molar ratio [A]/[B] of from 95/5 to 1/99, wherein the absolute value of the ratio &#x394;OB/&#x394;F is from 0.001 to 0.250 in which &#x394;OB represents the amount of a change in the absolute value of the orientation birefringence calculated from the phase difference (nm) at a wavelength of 633 nm/film thickness (&#x3bc;m) in a stretched film obtained from the optical material, and &#x394;F represents the amount of a change in the absolute value of the orientation coefficient determined from the dichroic ratio of parallel light intensity Ito perpendicular light intensity I, each relative to the orientation direction according to Raman spectroscopy. 

Optical material and molded product thereof

In order to fix an optical fiber to a desired position in a holding member easily and tightly, provided is an optical collimator () having a plastic optical fiber () and a cylindrical holder (). The holder () is configured to hold a collimator lens () at an end and has an insertion hole () at an opposite end for inserting the plastic optical fiber (). The plastic optical fiber () is sandwiched by an inner surface of a recess () which is formed at a part of the holder () in proper alignment with the collimator lens ().

Optical collimator and optical connector using same

Growing community of inventors

Yokohama, Japan

Yasuhiro Koike