Nitto-denko Corporation

Masahiro Yaegashi

Daisuke Ogomi

Yuki Nakano

Yuji Saiki

Kota Nakai

Yuuki Nakano

Mitsuru Suzuki

Tetsurou Ikeda

Reiko Akari

Shusaku Goto

Shinobu Nagano

Seiji Umemoto

Masayuki Satake

Kuniaki Ishibashi

A whiteboard film () according to an embodiment of the present invention includes: a diffuse reflection layer () to diffuse-reflect visible light; an absorptive polarizing layer () having a first transmission axis that is parallel to a first direction; and a reflective polarizing layer () being disposed between the diffuse reflection layer () and the absorptive polarizing layer () and having a second transmission axis that is substantially parallel to the first direction. A whiteboard () according to an embodiment of the present invention includes: a diffuse reflection plate () to diffuse-reflect visible light; an absorptive polarizing layer () having a first transmission axis that is parallel to a first direction; and a reflective polarizing layer () being disposed between the diffuse reflection plate () and the absorptive polarizing layer () and having a second transmission axis that is substantially parallel to the first direction.

Whiteboard film, whiteboard, peep prevention system

The room includes: a ceiling; a floor; and a wall having a pair of wall surfaces opposite to each other, and another pair of wall surfaces opposite to each other in a direction intersecting the pair of wall surfaces. One of the pair of wall surfaces and the other pair of wall surfaces has a window. The wall surface opposite to the wall surface having the window has arranged thereon a first screen. An inner side of the window, and a projection-side surface of the first each has arranged thereon a polarizing plate. An absorption axis direction of a polarizer of the polarizing plate of the window, and an absorption axis direction of a polarizer of the polarizing plate of the first screen and/or an absorption axis direction of a polarizer of the polarizing plate of the second screen are substantially perpendicular or parallel to each other.

Room

Provided is a polarizer having a non-polarization portion with reduced shape unevenness. The polarizer of the present invention is a polarizer having a non-polarization portion, in which the non-polarization portion has a shape matching degree of 0.05 or less. In such polarizer, the number of portions where the shape of the non-polarization portion is distorted is small. Accordingly, when the non-polarization portion of the polarizer is used as, for example, a portion corresponding to a camera portion of an image display apparatus, alignment processability is improved and hence the alignment of the camera can be satisfactorily performed.

Polarizer having non-polarizing part

A long polarizer that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, that shows no variation in quality when provided as a final product, and that is excellent in yield in its production. A polarizer according to an embodiment includes a long resin film containing a dichromatic substance, the polarizer having non-polarization portions arranged in a lengthwise direction and/or a widthwise direction at predetermined intervals, the non-polarization portions including decolored portions formed through partial decoloring.

Polarizer having non-polarization portions, a long polarizing plate and image display device comprising the polarizer

A polarizer that can realize the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus. A polarizer including a resin film containing a dichroic substance, wherein the polarizer has a low dichroic substance concentration portion whose content of the dichroic substance is relatively low in the resin film. In the polarizer, the low dichroic substance concentration portion has a content of an alkali metal and/or an alkaline earth metal of 3.6 wt % or less.

Polarizer, polarizing plate, and image display apparatus

A polarizer that can realize the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus. A polarizerincluding a resin film containing a dichromatic substance, wherein the polarizer has a low dichromatic substance concentration portion whose content of the dichromatic substance is relatively low in the resin film. The low dichromatic substance concentration portionis brought into contact with an acidic solution. The low dichromatic substance concentration portion corresponds to a camera portion of an image display apparatus on which the polarizer is mounted.

A long polarizer that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, that shows no variation in quality when provided as a final product, and that is excellent in yield in its production. A polarizer including a long resin film containing a dichromatic substance, the polarizer having non-polarization portions arranged in a lengthwise direction and/or a widthwise direction at predetermined intervals, the non-polarization portions including decolored portions formed through partial decoloring.

There is provided a polarizer having a non-polarization portion that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, the polarizer being excellent in dimensional stability and external appearance of the non-polarization portion. A polarizer according to an embodiment of the present invention includes a resin film containing a dichromatic substance, wherein: the polarizer has a non-polarization portion at a predetermined position; and the non-polarization portion includes a thin-walled portion thinner than another portion of the resin film.

Polarizer

A long polarizing film laminate capable of producing a polarizer that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, that shows no variation in quality when provided as a final product, and that is excellent in yield in its production. A polarizing film laminate according to an embodiment of the present invention includes: a long polarizer; and a surface protective film arranged on one surface side of the polarizer. The polarizing film laminate has, on the one surface side, exposed portions where the polarizer is exposed. The exposed portions are arranged in a lengthwise direction and/or a widthwise direction of the polarizer at predetermined intervals.

Polarizing film laminate comprising a long polarizing having exposed portion where a polarizer is exposed

A polarizer according to an embodiment of the present invention includes a resin film having a thickness of 13 &#x3bc;m or less and containing iodine. The resin film has formed therein a low-concentration portion having a content of the iodine lower than that of another portion.

A polarizing plate of the present invention comprises a polarizer; an adhesive layer; and a transparent protective film bonded to at least one side of the polarizer with the adhesive layer interposed therebetween, wherein the adhesive layer is formed from an active energy ray curing adhesive containing at least one curable component, and the adhesive layer has a glass transition temperature (Tg) of 60&#xb0; C. or more, and a thickness of 0.01 &#x3bc;m an to 5 &#x3bc;m. The polarizing plate has sufficient durability in a severe environment at high temperature and high humidity.

Polarizing plate, optical film and image display

A method of the present invention for producing a polarizing plate including a polarizer and a transparent protective film provided on one side of the polarizer with an adhesive layer interposed therebetween, include the steps of: (A) irradiating at least one side of a polarizer with vacuum ultraviolet rays to treat a surface of the polarizer; (B) bonding a first transparent protective film to the side of the polarizer, which has been subjected to the surface treatment step (A), with a first adhesive layer interposed therebetween to produce a temporary polarizing plate; and (C) peeling off the first transparent protective film and a surface layer of the polarizer, which has been subjected to the surface treatment, from the temporary polarizing plate. A thin polarizing plate in which shrinkage-induced bending is reduced may be obtained by the method.

Method for producing polarizing plate, polarizing plate, optical film, and image display

A polarizing plate of the present invention comprises: a polarizer; a transparent protective film placed on at least one side of the polarizer; and an adhesive layer interposed between the polarizer and the transparent protective film, wherein the polarizer is a stretched polyvinyl alcohol film dyed with a dichroic material and containing a sulfate ion, and the adhesive layer is formed with an active energy ray-curable adhesive containing at least one curable component. The polarizing plate has durability at high temperature.

Polarizing plate, manufacturing method therefor, optical film and image display

A polarizing plate of the present invention comprises: a polarizer; a transparent protective film placed on at least one side of the polarizer; and an adhesive layer and an adhesion facilitating layer interposed in this order from the polarizer side between the polarizer and the transparent protective film, wherein the adhesive layer is formed with an active energy ray-curable adhesive that contains a hydroxyl group-containing N-substituted amide monomer as a curable component, and the adhesion facilitating layer is formed with a polymer resin composition that contains 100 parts by weight of a polymer resin and 3 to 30 parts by weight of an organosilane compound having at least one functional group selected from an acryloyl group, a methacryloyl group, a vinyl group, and a mercapto group. The polarizing plate has good adhesion.

Growing community of inventors

Ibaraki, Japan

Masahiro Yaegashi