Dai Nippon Printing Co., Ltd.

Akinobu Ushiyama

Takashi Kuroda

Yoshiko Tanaka

Shosei Kubota

Hiroshi Kojima

Satoshi Goishihara

Akiko Tomita

Takayuki Shimada

Kazuki Tanaka

Fumihiro Arakawa

Toshio Yoshihara

Hiroaki Segawa

Norio Ishii

Mitsuhiro Hamashima

Runa Nakamura

Satoko Maenishi

Kazuo Matsufuji

Keiko Kitano

Mitsuru Inoue

Amane Koike

Ai Shinkai

Hikaru Hotta

Provided is an anti-glare antireflection member capable of suppressing coloring in viewing in an oblique direction, and suppressing visual recognition of local luminescent spots. The anti-glare antireflection member comprises an anti-glare layer and a low refractive index layer on a substrate. The average of Δd is 7.0 nm or more and 40.0 nm or less, where Δd is a thickness difference of the low refractive index layer in an arbitrary 2 mm×2 mm region of the anti-glare anti refractive index layer.

Anti-glare antireflection member, polarizing plate, surface plate, and image display device which are provided with anti-glare antireflection member, and method for selecting anti-glare antireflection member

The present disclosure addresses the problem of providing an optical plastic film such that rainbow unevenness when viewed with naked eyes and blackout when viewed with polarized sunglasses can be suppressed without any axis alignment or increase in the in-plane phase difference. Disclosed is an optical plastic film satisfying the following conditions 1 and 2: <Condition 1> when a large sample with a size of 200 mm×300 mm is cut out from a plastic film, the large sample is divided into 30 small samples of 40 mm×50 mm, a region of 30 mm×40 mm obtained by excluding 5 mm from each edge of each small sample is subdivided into 47,000 or more regions, and an in-plane phase difference of each subdivided region is then measured, a percentage of small samples in which an average of the in-plane phase difference of each region measured is 50 nm or more and 1,200 nm or less, among the 30 small samples is 50% or more; and <Condition 2> when the 30 small samples are processed in the same manner as in condition 1 and an angle of slow axis of each subdivided region of each small sample is measured, a percentage of small samples in which a standard deviation a calculated from the angle of slow axis of each region measured is 0.8 degrees or more, among the 30 small samples is 50% or more.

Optical plastic film, and optical laminate, polarization plate, and image display device using same

Provided is an optical film that can suppress rainbow unevenness when viewed with the naked eyes without increasing the in-plane phase difference. The optical film has a low-refractive index layer on a plastic film, the plastic film is a biaxially stretched plastic film with an in-plane phase difference of 2500 nm or less, the low-refractive index layer is located on the outermost surface, and the optical film has a region in which ΔEab satisfies specific conditions, wherein the ΔEab is calculated from the differences between the L* value, the a* value, and the b* value obtained by measuring a laminate 1 including the optical film, the polarizer, and the surface light source under specific conditions and the L* value, the a* value, and the b* value obtained by measuring a laminate 2 including the polarizer and the surface light source under specific conditions, respectively.

Optical film, polarizing plate, image display device, and optical film selection method

Provided is an optical film that can eliminate rainbow unevenness when viewed with the naked eyes and provide favorable color tone uniformity when viewed at an oblique angle. This optical film has a low-refractive index layer on a plastic film, the plastic film has a slow axis that is an axis with the largest refractive index in a plane, and a fast axis that is an axis orthogonal to the slow axis in the plane of the plastic film, and the low-refractive index layer is located on the surface of the optical film. Linearly polarized light is incident, under predetermined conditions, from a surface on a side opposite to the low-refractive index layer of the optical film, and transmitted light of the linearly polarized light is used to measure the a* value and b* value of the L*a*b* color system at 11 measurement points with different angles. The measurements at the 11 measurement points are used to calculate a sum of square of a difference in a* between adjacent measurement points and square of a difference in b* between the adjacent measurement points. The sum was calculated for each of 10 adjacent points. The optical film has a Σ, which indicates a total of the above sums, within a predetermined range.

Optical plastic film, and optical laminate, polarization plate, and image

There is provided an optical sheet which can prevent problems when it is superimposed on another member. The optical sheet includes: a sheet-like base layer; a light control layer having unit shaped elements arranged in a direction parallel to a sheet surface of the base layer; and a light diffusing layer disposed between the base layer and the light control layer. The light diffusing layer includes a binder resin portion and particles dispersed in the binder resin portion. The particles in the binder resin portion includes a single particle and an aggregate formed of aggregated single particles.

Optical sheet, surface light source device and transmission type display device

An optical sheet including a fly-eye lens is provided, which exhibits excellent optical functions, including desired light condensing ability, light diffusing ability and an ability for rendering a light source image substantially invisible, and can be produced with high reproducibility. The optical sheet includes a sheet-like main body, first unit shaped elements arranged on one surface of the main body and together constituting the fly-eye lens; and second unit shaped elements arranged on the one surface of the main body and extending in parallel with one direction on the sheet surface of the main body. The first unit shaped elements are arranged, with a space provided therebetween, on the one surface of the main body, while the second unit shaped elements are arranged between the first unit shaped elements on the one surface of the main body.

Optical sheet, surface light source device and transmission-type display device

An optical sheet including a body portion, unit optical elements arranged on one surface of the body portion, and an uneven coating having an uneven surface with micro-protrusions, provided on the other surface of the body portion. When the hardness He of the optical element surface Pe and the hardness Hm of the uneven coating surface Pm are evaluated in terms of the pencil hardness measured in accordance with JIS K5600-5-4 (1999) (load: 1000 g; speed: 1 mm/s), the hardness Hm is not less than the hardness He (hardness Hm&#x2267;hardness He) and the hardness Hm is preferably not less than F. Further, the hardness He and the hardness Hm preferably satisfy the following relation:hardness+3&#x2267;hardness&#x2267;hardness2

Optical sheet, optical member, surface light source device, and liquid crystal display device

An optical sheet having both of an excellent light condensing function and an excellent scratch resistance is provided. An optical sheet includes: a sheet-like main body; at least three or more first unit shaped elements arranged on one surface of the main body; and second unit shaped elements arranged on the one surface of the main body. Each of the second unit shaped elements extend in parallel with in one direction on a sheet surface of the main body. A height Hof each of the first unit shaped elements from the one surface is higher than a height Hof each of the second unit shaped elements. A rate of an area occupied by the first unit shaped elements on the one surface is not more than 10.0%, when observed along a normal direction nd relative to the one surface.

An anti-glare film having the following: an anti-glare layer which is provided on a transparent substrate film, has a concavo-convex shape on the outermost surface thereof, and has at least a concavo-convex layer formed by curing a curable resin composition, which composition has optically-transparent fine particles A that have an average particle diameter of 1 &#x3bc;m or more and 10 &#x3bc;m or less, reactive inorganic fine particles B that have an average particle diameter of 30 nm or more and 100 nm or less and reactive functional groups b on the surface thereof, and a binder component C that has reactive functional groups c; a skin layer which has a small number of the reactive inorganic fine particles B in an interface on the side opposite to the transparent substrate film side and in the vicinity of the interface; and a region which is situated nearer the transparent substrate film than the skin layer, in which the fine particles B are uniformly dispersed.

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Moriya, Japan

Akinobu Ushiyama