Matsushita Electric Industrial Co., Ltd.

Yoshinobu Murakami

Kazuhisa Morimoto

Masahide Tsukamoto

Tetsuro Ohtsuka

Mikiko Matsuo

Hisanori Sugiura

Tetsuya Satou

Hitoshi Hisada

Ryuichi Shingae

Hideo Hatanaka

Tooru Tamura

Shunsuke Matsuda

Akio Ito

A thin film EL device having high electroluminescent efficiency, a low operating voltage, and a long lifetime. A thin film EL device of the present invention uses, as a luminescent layer, a charge-transport luminescent material that has, within a molecule, a portion contributing to charge transport and a portion contributing to luminescence where at least two molecular orbitals contributing to luminescent transition are localized.

Thin film EL device

A thin film EL device having high electroluminescent efficiency, a low operating voltage, and a long lifetime. The thin film EL device uses, as a luminescent layer, a charge-transport luminescent material that has, within a molecule, a portion contributing to charge transport and a portion contributing to luminescence where at least two molecular orbitals contributing to luminescent transition are localized.

Thin film el device

There are provided acrylic plastic lenses having a wide range of refractive indices as well as excellent physical and optical properties by polymerization of specific acrylic monomers in the presence of a photopolymerization initiator and a thermal polymerization catalyst.

Plastic lens of neopentyl glycol dimethacrylate copolymerized with

There is provided a hygroscopic resin comprising a vinyl polymer having an epoxy group, said vinyl polymer being a copolymerization product between a vinyl monomer having a hydrophilic property and a further vinyl monomer having an epoxy group. This hygroscopic resin is not soluble in water or organic solvent and is thus useful for various applications, e.g., a humidity sensor can be made by dispersing a conductive powder in the hygroscopic resin. This humidity sensor has high sensitivity to humidity and can operate stably for a long time.

Hygroscopic resin and humidity sensor using the same

An electro-optical device using a liquid crystal consisting of 99.9 to 30 wt.% of at least one nematic liquid crystal and 0.1 to 70 wt. % of at least one optically active liquid crystal compound, (+)-p-alkoxy-p'-(2-methylbutyl)azoxybenzene. Such a device has a better display performance than similar devices because the mixture has a threshold voltage and a rapid response to an electric signal applied to the device, and so it is very practical for a matrix display device.

Electro-optical device

The present invention provides an improved electro-optical device having a cell for containing a liquid crystal and consisting of two light-transparent plates opposed to each other and having electrically conductive electrodes on the inner surfaces thereof, the electrodes on at least one inner surface being transparent and spacer means between said opposed electrodes; and a power supply coupled to said electrodes for applying an electric voltage to said electrodes, whereas the improvement comprises a liquid crystal in said cell between said electrodes consisting of 99.95 to 65 wt.% of at least one nematic liquid crystal and 0.05 to 35 wt.% of at least one optically active compound of the formula: ##EQU1## wherein X is --N=N-- or ##EQU2##

Electro-optic device

The present invention provides an improved electrooptical device having a cell for containing a liquid crystal and consisting of two light-transparent plates opposed to each other and having electrically conductive electrodes on the inner surfaces thereof, the electrodes on at least one inner surface being transparent, and spacer means between said opposed electrodes; and a power supply coupled to said electrodes for applying an electric voltage to said electrodes, whereas the improvement comprises a liquid crystal in said cell between said electrodes consisting of 99.95 to 65 wt.% of at least one nematic liquid crystal and 0.05 to 35 wt.% of at least one optically active compound of the formula; ##SPC1## Wherein X is CH=N, --N=N--or ##EQU1##

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Katano, Japan

Yoshinobu Murakami