KEIWA INC. Patent applications |
Patent application number | Title | Published |
20150075615 | BACK SHEET FOR SOLAR BATTERY MODULE, PRODUCTION METHOD OF BACK SHEET FOR SOLAR BATTERY MODULE, AND SOLAR BATTERY MODULE - A back sheet for a solar battery module that is less likely to cause a rise in temperature by irradiation with rays of the sun even though displaying a black color in appearance, and is less likely to discolor even after a long-term use thereof while suppressing a rise in cost. The back sheet for a solar battery module according to the present invention includes a colored layer that includes three or more types of color materials each having a different hue and a brightness L* of no less than 45, the colored layer having a brightness L* of no greater than 40. It is preferred that the three or more types of color materials are constituted with at least a red color material, a blue color material and a yellow color material. Preferably, a base sheet on which the colored layer is laminated is further included. It is preferred that the base sheet displays a white color and the colored layer is laminated on the front face side of the base sheet. Moreover, the base sheet preferably includes a base film and a white layer laminated on the front face side of the base film. | 03-19-2015 |
20150049388 | VIEW ANGLE-RESTRICTING SHEET AND FLAT PANEL DISPLAY - The view angle-restricting sheet according to the present invention includes an optically functional layer which includes: a plurality of first light transmission sections that are rectangular in cross section and arranged in a multi-stripe fashion; and at least one second light transmission section that is/are rectangular in cross section and arranged between the first light transmission sections, at least one of the lateral face of the first light transmission section and the lateral face of the second light transmission section that face each other being provided as a light-scattering surface having a microstructure including fine protrusions. The arithmetic mean roughness (Ra) of the light-scattering surface is preferably no less than 1.5 μm and no greater than 4 μm. The ratio (Rz/Ra) of the ten-point mean roughness (Rz) to the arithmetic mean roughness (Ra) of the light-scattering surface is preferably no less than 1 and no greater than 20. | 02-19-2015 |
20140293190 | LIGHT GUIDE FILM, BACKLIGHT UNIT FOR ULTRATHIN LIQUID CRYSTAL DISPLAY DEVICE AND MOBILE COMPUTER, AND METHOD FOR PRODUCING LIGHT GUIDE FILM - The present invention relates to a light guide film for a backlight unit of an ultrathin liquid crystal display device, the light guide film allowing rays of light entering from an end face to exit from a front face side, and including a hard layer ( | 10-02-2014 |
20140130851 | TACKY SHEET FOR PROTECTING BACK FACE OF SOLAR BATTERY MODULE, AND SOLAR BATTERY MODULE USING THE SAME - A tacky sheet for protecting a back face of a solar battery module includes a synthetic resin substrate layer, a tacky material layer laminated on one face side of the synthetic resin substrate layer, the tacky material layer having an average thickness of 0.01 mm or greater and 1 mm or less, and the tacky sheet being to be attached to a back face of a back sheet of a solar battery module via the tacky material layer. | 05-15-2014 |
20140092627 | OPTICAL WAVEGUIDE SHEET, EDGE-LIT BACKLIGHT UNIT AND LAPTOP COMPUTER - The optical waveguide sheet of the present invention is for use in an edge-lit backlight unit of a liquid crystal display unit of laptop computers having a housing thickness of no greater than 21 mm, and includes: an optical waveguide layer containing a polycarbonate-based resin as a principal component; and a hard coat layer laminated on the back face side of the optical waveguide layer, an average thickness of the optical waveguide sheet being no greater than 600 μm. An average thickness of the hard coat layer is preferably from 2 μm to 20 μm. The optical waveguide sheet preferably further includes a lower refractive index layer that is laminated on the back face of the optical waveguide layer and has a refractive index lower than that of the optical waveguide layer, and the hard coat layer is preferably laminated on the back face of the lower refractive index layer. | 04-03-2014 |
20140092626 | OPTICAL WAVEGUIDE SHEET, EDGE-LIT BACKLIGHT UNIT AND LAPTOP COMPUTER - The optical waveguide sheet of the present invention is an optical waveguide sheet for use in an edge-lit backlight unit of a liquid crystal display unit of laptop computers having a housing thickness of no greater than 21 mm, and includes an optical waveguide layer containing a polycarbonate-based resin as a principal component; and a protective layer laminated on the back face of the optical waveguide layer, the protective layer containing an acrylic resin as a principal component, wherein an average thickness of the optical waveguide sheet is no lower than 250 μm and no greater than 600 μm. An average thickness of the protective layer is preferably no less than 10 μm and no greater than 100 μm, and a relative refractive index of the protective layer with respect to the optical waveguide layer is preferably no greater than 0.95. | 04-03-2014 |