Nitto-denko Corporation

Takuya Matsunaga

Takashi Shouda

Masayuki Satake

Hiroshi Shibata

Shuuji Yano

Takayuki Shigematsu

Akihiro Nishida

Hiroe Maeda

Atsushi Kitagawa

Takezou Hatanaka

Takashi Kondou

Seiji Kondo

Youichirou Sugino

Seiichi Kusumoto

Yuuji Saiki

Senri Kondou

Yasushi Takahashi

Shigeo Kobayashi

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 light-diffusing sheet includes a transparent film and a light-diffusing layer formed on at least one side of the transparent film. The transparent film contains a thermoplastic resin having a substituted and/or non-substituted imido group in a side chain, and a thermoplastic resin having a substituted and/or non-substituted phenyl group and nitrile group in a side chain, and the surface with the minute unevenness has an average height-depth spacing (Sm): Sm&#x2266;80 &#x3bc;m, a center-line average surface roughness (Ra): Ra&#x2266;0.25 &#x3bc;m and a ten-point average surface roughness (Rz): Rz&#x2266;9Ra.

Light-diffusing sheet, optical element and image display

A light-diffusing sheet includes a transparent film and a light-diffusing layer formed on at least one side of the transparent film. The light-diffusing layer is composed of a resin coating layer having a rough surface. The transparent film contains a thermoplastic resin having a substituted and/or unsubstituted imide group at a side chain and a thermoplastic resin having a substituted and/or unsubstituted phenyl group and a nitrile group at a side chain.

Light-diffusing sheet, optical element and image viewing display

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.

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

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.

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Kearny, NJ, United States of America

Takuya Matsunaga