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Keiwa Inc patents


Recent patent applications related to Keiwa Inc. Keiwa Inc is listed as an Agent/Assignee. Note: Keiwa Inc may have other listings under different names/spellings. We're not affiliated with Keiwa Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "K" | Keiwa Inc-related inventors


Prism sheet for backlight unit and backlight unit for liquid crystal display device

Provided is a prism sheet for a backlight unit capable of attaining desired luminance in the front direction, and securing a sufficient viewing angle in the direction perpendicular to the orientation direction of the prism array. The prism sheet comprises one or more resin layers, an outermost resin layer of... Keiwa Inc

Optical sheet for liquid crystal display device, backlight unit for liquid crystal display device and production optical sheet for liquid crystal display device

An optical sheet for a liquid crystal display device includes a plurality of protruding portions provided scatteredly on a back face, in which the protruding portions each have a flattened semi-spherical shape or a flattened conical shape with a rounded apex. The protruding portions may each have a half spheroidal... Keiwa Inc

Sheet for image display unit, laminate for image display unit, and image display unit

A sheet for an image display unit to be provided on the front face side of an image display unit includes a substrate layer containing a cycloolefin copolymer as a principal component and an elastomer having a refractive index substantially equal to the refractive index of the cycloolefin copolymer, in... Keiwa Inc

Edge-lit backlight unit and reflective tape member

The edge-lit backlight unit according to the present invention includes a light guide film having an average thickness of no less than 100 μm and no greater than 600 μm; at least one thin light source disposed so as to face at least one end face of the light guide... Keiwa Inc

Light diffusion sheet for overlaying, and backlight unit

A light diffusion sheet for overlaying is to be provided on a front face side of a prism sheet in a backlight unit of a liquid crystal display device, and has a substrate layer and a light diffusion layer overlaid on a front face side of the substrate layer, in... Keiwa Inc

Substrate film for opticla sheet, optical sheet and backlight unit

An object of the present invention is to provide a substrate film for an optical sheet, an optical sheet and a backlight unit capable of markedly enhancing utilization efficiency of rays of light and improving luminance. The present invention is characterized by being a substrate film for an optical sheet... Keiwa Inc








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