Nitto-denko Corporation

Hisashi Mihara

Seiichi Kusumoto

Youichirou Sugino

Eiji Hamamoto

Naoki Takahashi

Tadayuki Kameyama

Hironori Motomura

Senri Kondou

Kazuki Tsuchimoto

Kazuhiro Higashio

Atsushi Kitagawa

Yuuji Saiki

Takashi Shouda

Akira Ootani

The present invention provides a polarizing film or a polarizer that has an elastic modulus of at most about 3500 N/mmand suppresses occurrence of warping, the polarizing film is obtained by adsorbing a dichroic material in a polyvinyl alcohol-based film 20 &#x3bc;m in thickness and stretching the film. The polarizing film has a transmittance of at least 43% and a polarization degree of at least 98%. A transparent protective layer is laminated on at least one surface of the polarizing film to form a polarizing plate.

Polarizing film and image display

The present invention provides a polarizing film or a polarizer that has an elastic modulus of at most about 3500 N/mmand suppresses occurrence of warping, the polarizing film is obtained by adsorbing a dichroic material in a polyvinyl alcohol-based film 20 &#x3bc;m in thickness and stretching the tilin. The polarizing film has a transmittance of at least 43% and a polarization degree of at least 98%. A transparent protective layer is laminated on at least one surface of the polarizing film to form a polarizing plate.

A polarizing plate having excellent moisture durability and a liquid crystal display using the same are disclosed. The polarizing plate is produced by covering all surfaces and sides of a polarizer with low moisture-permeable layers having moisture permeability of 310 g/m&#xb7;24 h or less. The rate of change in dimension of the polarizer in the uniaxially stretched direction is &#xb1;0.1% or less after left at a temperature of 60&#xb0; C. and humidity of 95% for 100 hours.

Polarizing plate having polarizer sides covered with low moisture permeable layers with permeability different than protective films covering the polarizer surfaces

A polarizing plate used for manufacturing a liquid crystal display with suppressed irregularity in brightness, a method of manufacturing the same, and a liquid crystal display using the same, are provided. The polarizing plate is formed having a laminate of a polarizing film and a transparent protective layer provided on at least one surface of the polarizing film. By heat-treating and subsequently reheat-treating, the laminate has a shrinkage force of at most 8N/10 mm width when the laminate is further left at 60&#xb0; C. for 1 hour, and furthermore, the laminate has a single hue value b of at most 4.6 NBS.

Polarizing plate and method of manufacturing the same, and liquid crystal display using the polarizing plate

A liquid crystal display comprising a liquid crystal display wide viewing angle polarizing adhesion film, which comprising a polarizing layer laminated on an optical compensation film and a retardation film and/or a brightness enhancement film laminated on said polarizing layer, wherein said polarizing layer is directly laminated on said optical compensation film, adhered onto at least one side of a liquid crystal panel, is less brightness nonuniformities.

Liquid crystal display wide viewing angle polarizing film and liquid crystal display wide viewing angle polarizing adhesive film

A polarizing plate and a liquid crystal display using the same are disclosed. The polarizing plate includes a polarizer made of a synthetic resin and protective films. The same protective films are attached to both sides of the polarizer. When a FTIR-ATR method is carried out with respect to the both sides of the protective film and a peak intensity (A) in the wavelength range around 1488 cmof one side, a peak intensity (B) in the wavelength range around 1365 cmof one side, a peak intensity (A') in the wavelength range around 1488 cmof another side and a peak intensity (B&#x2032;) in the wavelength range around 1365 cmof another side are measured, and (C) and (C&#x2032;) are represented by the relationships: (A)/(B)=(C) and (A&#x2032;)/(B&#x2032;)=(C&#x2032;), (C)/(C&#x2032;)&#x2267;1.2 is satisfied. The same sides of the protective films having the (C) and (C&#x2032;) are adhered to both sides of the polarizer. In the polarizing plates, in accordance with the invention, even at the exposure to heat and humidity, advantageously occurrence of curling (warping) is reproduced.

Polarizing plate having protective films with plasticizer, liquid crystal display using the same, and methods of making the same

Polarizing plate and liquid crystal display using the same

A polarizing plate having excellent moisture durability and a liquid crystal display using the same are disclosed. The polarizing plate is produced by covering all surfaces and sides of a polarizer with low moisture-permeable layers having moisture permeability of 310 g/m &middot;24 h or less. The rate of change in dimension of the polarizer in the uniaxially stretched direction is &plusmn;0.1% or less after left at a temperature of 60&deg; C. and humidity of 95% for 100 hours.

Polarizing plate having all surfaces and sides covered with low moisture-permeable layers and liquid crystal display using the same

A polarizer having good durability that is dyed by iodine, and is given boric acid processing, and moreover contains zinc without generating fault by deposit of boric acid or zinc, may be produced by a process of producing, comprising the steps of: conducting a dyeing processing by iodine to a non-stretched poly vinylalcohol film; conducting an uniaxial stretching processing and a boric acid processing; subsequently conducting a zinc impregnation processing; and furthermore, conducting an iodine ion impregnation processing.

Process of producing a polarizer, polarizer, polarizing plate, and visual display

Disclosed are (1) a polarizer having a function of separating incident light into polarized light through reflection and transmission, which has (a) a haze of 10% or less, or (b) a ratio of parallel transmitted light to incident light of 40 to 60%, (c) a ratio of mirror reflected light to the incident light of 25% or more, (d) a ratio of diffusion reflected light to the incident light of 20% or less or (e) a fraction of mirror reflected light to the whole reflected light of 60% or more; (2) an optical element comprising the polarizer, and a &frac14; wavelength formed by one or two or more retardation layers disposed on at least one side thereof; (3) a lighting device comprising a surface light source, and the polarizer or the optical element disposed thereon; and (4) a liquid crystal display comprising the lighting device and a liquid crystal cell arranged on the light outgoing side thereof, with a polarizing plate intervening therebetween.

Polarizer, optical element, lighting device and liquid crystal display

Thin polarizing plate and liquid crystal display using the same

A liquid crystal element which comprises an oriented liquid crystal polymer and with which a liquid crystal display less apt to have display unevenness in a wide viewing range including the front and slant directions can be fabricated; and an optical element and a polarizing element each containing the liquid crystal element. The liquid crystal element comprises either a layer of an oriented liquid crystal polymer or a substrate and formed thereon the layer of an oriented liquid crystal polymer, wherein the liquid crystal polymer layer has an average in-plane haze of 10% or higher and a dispersion of the in-plane haze H (%) within the range represented by the relationship a-.sqroot.(10a).ltoreq.H.ltoreq.a+.sqroot.(10a) wherein 'a' is the average haze (%), or has an average in-plane haze lower than 10% and a dispersion of the in-plane haze H (%) within the range represented by the relationship 0.ltoreq.H.ltoreq.b+.sqroot.(10b) wherein 'b' is the average haze (%). The optical element comprises a multilayer structure comprising the liquid crystal element and a retardation film laminated thereon. The polarizing element comprises a multilayer structure comprising the liquid crystal or optical element and a polarizing plate laminated thereon.

Liquid crystal element with a layer of an oriental liquid crystal

Disclosed are (1) a polarizer having a function of separating incident light into polarized light through reflection and transmission, which has (a) a haze of 10% or less, or (b) a ratio of parallel transmitted light to incident light of 40 to 60%, (c) a ratio of mirror reflected light to the incident light of 25% or more, (d) a ratio of diffusion reflected light to the incident light of 20% or less or (e) a fraction of mirror reflected light to the whole reflected light of 60% or more; (2) an optical element comprising the polarizer, and a 1/4 wavelength formed by one or two or more retardation layers disposed on at least one side thereof; (3) a lighting device comprising a surface light source, and the polarizer or the optical element disposed thereon; and (4) a liquid crystal display comprising the lighting device and a liquid crystal cell arranged on the light outgoing side thereof, with a polarizing plate intervening therebetween.

Growing community of inventors

Ibaraki, Japan

Hisashi Mihara