Lintec Corporation

Yumiko Matsubayashi

Satoshi Naganawa

Takeshi Kondo

Shinichi Hoshi

Naoki Taya

Takashi Morioka

Yoshitomo Ono

Kazue Saito

Yuko Iwamoto

Kiichiro Kato

Atsushi Tezuna

Kazuhiro Tsuda

Osamu Kanazawa

Huminori Ikeda

The present invention provides a luminescent composition which is capable of providing an inorganic electroluminescent sheet with a high productivity at low costs in an efficient manner, and has a desired light transmittance (transparency) when no electric voltage is applied thereto, an inorganic electroluminescent sheet obtained from the luminescent composition which can be mass-produced, and a process for producing the inorganic electroluminescent sheet. The present invention relates to a luminescent composition including an inorganic electroluminescent substance and a binder resin, wherein a content of the inorganic electroluminescent substance is not less than 0.5 part by mass and less than 100 parts by mass on the basis of 100 parts by mass of the binder resin; and an inorganic electroluminescent sheet including at least a first transparent substrate, a first transparent electrode, an inorganic electroluminescent layer, a first transparent electrode and a second transparent substrate which are successively laminated in this order, wherein the inorganic electroluminescent layer is formed from the above luminescent composition, and the inorganic electroluminescent sheet has a light transmittance of 60% or more as measured at a wavelength of 550 nm under a non-light emitting condition.

Luminescent composition and inorganic electroluminescent sheet using the same

A light-emitting sheet which does not cause failures such as a short circuit without causing dielectric breakdown at the end of element at applying a voltage and which is able to realize stable driving, and an efficient method for producing the light-emitting sheet, are provided. Specifically, a light-emitting sheet having a first electrode, a second electrode, and a light-emitting layer disposed between the first and the second electrodes, wherein a short circuit preventing member composed of an insulator is arranged on the periphery of the light-emitting layer in such a way that a part of the member is projected from the light-emitting layer, and an efficient method for producing the light-emitting sheet, are provided.

Light emitting sheet and manufacturing method thereof

A light-emitting sheet including: a first electrode; a second electrode; and a light-emitting layer disposed between the first and the second electrodes, where the first electrode and/or the second electrode disposed on and under the periphery of the light-emitting layer arc cut to form a non-conductive portion being electrically disconnected with a circuit that applys a voltage to the light-emitting sheet, and as seen from a vertical direction to the plane of the light-emitting sheet, the non-conductive portion formed from the first electrode or the non-conductive portion formed from the second electrode surrounds the light-emitting layer, or the non-conductive portion formed from the first electrode and the non-conductive portion formed from the second electrode are apparently connected to each other and surrounds the light-emitting layer.

Light emitting sheet having high dielectric strength properties and capable of suppressing failures

A luminescent composition can efficiently provide an inorganic electroluminescent sheet with a high productivity at low costs. The composition has a desired light transmittance (transparency) when no electric voltage is applied to it. The composition includes an inorganic electroluminescent substance and a binder resin. A content of the inorganic electroluminescent substance is at least 0.5 part and less than 100 parts by mass on the basis of 100 parts by mass of the binder resin. The inorganic electroluminescent sheet includes a first transparent substrate; a first transparent electrode; the inorganic electroluminescent layer of the luminescent composition; a first transparent electrode; and a second transparent substrate, successively laminated in this order. The inorganic electroluminescent sheet has a light transmittance of 60% or more, measured at a wavelength of 550 nm under a non-light emitting condition.

Process for producing an inorganic electroluminescent sheet

To provide a pressure-sensitive adhesive sheet according to which air entrapment and blistering can be prevented or eliminated via through-holes, and yet the appearance compares favorably with that of a pressure-sensitive adhesive sheet having no through-holes therein, as a substratethere is used one having a surface roughness (Ra) of not less than 0.03 &#x3bc;m, a lightness (L*) in the L*a*b* color system of not more than 60 in the case of having a chroma (C*) of not more than 60 and a lightness (L*) of not more than 85 in the case of having a chroma (C*) greater than 60, and a contrast ratio of not less than 90%, through-holespassing through the substrateand a pressure-sensitive adhesive layerare made to have a diameter in the substrateand the pressure-sensitive adhesive layerof from 0.1 to 200 &#x3bc;m, a diameter at a surface of the substrateof from 0.1 to 42 &#x3bc;m, and a hole density of from 30 to 50,000 per 100 cm, in the case that melted portions formed by a laser are present around the through-holesat the surface of the substrate, the melted portions are made to have an outside diameter of not more than 50 &#x3bc;m, and in the case that thermally deformed portions are present around the through-holesat the surface of the substrate, the thermally deformed portions are made to have an outside diameter of not more than 180 &#x3bc;m.

Pressure-sensitive adhesive sheet

According to the present invention, a pressure-sensitive adhesive for a motor vehicle brake disc antirust film, which comprises an acrylic resin based pressure-sensitive adhesive prepared by crosslinking an acrylic copolymer containing a unit based on a (meth)acrylamide based monomer and having a weight average molecular weight of 500,000 to 1,100,000 with a polyisocyanate compound by the utilization of the unit based on a (meth)acrylamide based monomer as a crosslinking base point. The pressure-sensitive adhesive for a motor vehicle brake disc antirust film can provide a motor vehicle brake disc antirust film which is hardly peeled off when adhered onto a motor vehicle wheel.

Growing community of inventors

Saitama, Japan

Yumiko Matsubayashi