Nitto-denko Corporation

Takashi Shouda

Masayuki Satake

Takuya Matsunaga

Youichirou Sugino

Seiichi Kusumoto

Yuuji Saiki

Senri Kondou

Hiroshi Shibata

Yasushi Takahashi

Kazuki Tsuchimoto

Takayuki Shigematsu

Atsushi Kitagawa

Seiji Kondo

Hisashi Mihara

Eiji Hamamoto

Yuji Saiki

Shigeo Kobayashi

A polarizing plate excellent in polarization performance in all wavebands from a short wavelength region to a long wavelength region and a liquid crystal display using such a polarizing plate. The polarizing plate including a polarizer has a portion having a polarization degree of 99% or more at each wavelength of light for wavelengths of 420 to 550 nm and a portion having a polarization degree of 99% or more at each wavelength of light for wavelengths of 550 to 700 nm.

Polarizing plate and liquid crystal display using the same

The present invention, a light diffusing sheet comprising a transparent resin layer having a minute unevenness formed on a surface thereof on at least one side of a transparent substrate, and a haze value of the light diffusing sheet is 30% or more, a ratio (Ra/Sm) of a center-line average surface roughness (Ra: &#x3bc;m) and an average height-depth spacing (Sm: &#x3bc;m) is 0.005 or less, and the Ra satisfies a relationship of 0.1&#x2266;Ra&#x2266;0.4. The light diffusing sheet enables suppression of glaring of a screen and white blurring, while maintaining antiglare property, having excellent image visibility.

Light diffusing sheet, optical element and image display

An optical diffusing layer includes a resin coated layer having a surface fine concavo-convex structure. An average of peak-to-peak distance (Sm), an average of center line surface roughness (Ra), and an average of ten-point surface roughness (Rz) on the surface with fine concavo-convex structure satisfy specified equations, and the optical diffusing layer is capable of maintaining antiglare property and screen glare simultaneously controlled, when applied to an LCD in which high definition is required.

Optical diffusing layer, optical diffusing sheet, and optical element

A polarizing film may be manufactured without using adhesives by a method in which a protective film (B) is laminated onto at least one face of a polarizer (A), then adhered by thermocompression bonding. Thus problems on manufacturing method of a polarizing film possibly caused by use of adhesives will not be generated.

Manufacturing method of polarizing film, polarizing film, optical film, and visual display

A polarizing film comprising a stretched film containing iodine, wherein an absorbance characteristics ratio of ((an absorption peak A in a wavelength range of 550 to 650 nm)/(an absorption peak B in a wavelength range of 450 to 520 nm)) is no more than 1.5 when the polarizing film is arranged in a crossed Nicol, form a liquid crystal display for color display that provides as neutral hue as possible, and gives good black color display, and as a result gives an outstanding reproducibility of color.

Polarizing film polarizing plate and liquid crystal display

A polarizing film comprising a polarizer (A) and a protection film (B) prepared on at least one face of the polarizer (A), wherein the protection film (B) is adhered to the polarizer (A) without using adhesives, is induced problems by use of adhesives.

Polarizing film, optical film and liquid crystal display using polarizing film

An optical diffusing layer comprising a resin coated layer having a surface fine concavo-convex structure, wherein an average of peak-to-peak distance (Sm), an average of center line surface roughness (Ra), and an average of ten-point surface roughness (Rz) on the surface with fine concavo-convex structure satisfy specified equations, is capable of maintaining antiglare property and screen glare simultaneously controlled, when applied to an LCD in which high definition is required.

An acrylic derived adhesive that is used for attachment of a polarizing plate having a difference of no more than 5% between an initial gel ratio and a gel ratio after the adhesive is heated at 80&#xb0; C. for 500 hours is efficiently used as adhesive for polarizing plate excellent in long-term preservation quality and for optical member.

Adhesive used for polarizing plate and optical member

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

A polarizing plate is provided with an optical compensation film and includes a polarizing plate, an adhesive layer A, an optical compensation film, and an adhesive layer B adhered to one another, wherein the polarizing plate comprises a polyvinyl alcohol polarizing film containing a dichroic substance, and wherein the elastic modulus of the adhesive layer A of the polarizing plate with an optical compensation film is not greater than 0.06 MPa. Furthermore, a liquid crystal display is provided in which the polarizing plate with an optical compensation film is furnished on at least one side of the liquid crystal cell. Thus, display irregularities can be improved.

Polarizing plate with optical compensation film and liquid crystal display

An optical diffusion sheet comprising a transparent substrate and an optical diffusion layer having fine concavo-convex shape on a surface, wherein 60&deg; glossiness of a surface of the fine concavo-convex shape is 70% or less, and a haze value of the optical diffusion sheet is 30% or more, and in a viewing display equipped with an optical element comprising the optical diffusion sheet provided thereto, following conditions; C1/C0&gE;0.2, C2/C0&gE;0.1, C3/C0&gE;0.1, are satisfied, as C0 when surface illumination is 0 lux, as C1 when surface illumination is 500 lux, as C2 when surface illumination is 1000 lux, and as C3 when surface illumination is 2000 lux., prevent reflection from outside environment, is excellent antiglare property, and suppress whitish display in an image viewing display surface to give an excellent clearness, and further screen glare.

Optical diffusion sheet, optical element, and viewing display

An optical member comprising an optical material or a laminated body of the optical materials in a shape a sheet or a film and an adhesive layer at least on one side thereof, wherein a repulsive force when deformed at 180&deg; in radius of 25 mm with 25 mm width shows 0.2 to 0.8 N, is used in a liquid crystal display. The optical member have a peeling strength may be decreased without decrease in adhesive strength of adhesive itself to enable easy formation of trigger for peeling.

Optical member and liquid crystal display device

The antiglare layer includes at least one resin coat layer (a) containing particles and a resin coat layer (b) laminated on said resin coat layer (a). The resincoat layer (b) contains particles and has a surface uneven configuration. An average particle size of the particles contained in the resin coat layer (b) is smaller than or equal to an average particle size of the particles contained in the resin coat layer (a), is capable of restraining the screen glaring phenomenon while maintaining the antiglare property and in which the whiting is observed to the least extent.

Growing community of inventors

Ibaraki, Japan

Takashi Shouda