Fujifilm Corporation

Japan Science and Technology Agency

Yoshiaki Hisakado

Yukito Saitoh

Yoji Ito

Makoto Ishiguro

Hiroshi Sato

Jun Takeda

Nobutaka Fukagawa

Keita Takahashi

Yujiro Yanai

Hiroshi Matsuyama

Yoichi Maruyama

Hirofumi Toyama

Yuta Takahashi

Taiji Katsumata

Masato Nagura

Naozumi Shiraiwa

Susumu Sugiyama

Takahiro Ohno

Naoyuki Nishikawa

Shigeaki Nimura

Hajime Nakayama

Yasuyuki Sasada

Takuya Inoue

Rikio Inoue

Yu Naito

Kunihiro Atsumi

Junichi Hirakata

Yutaka Adegawa

Shinpei Yoshida

Satoshi Shimamura

Isao Fujiwara

Hirotsugu Kikuchi

Tisato Kajiyama

Toshihiko Nagamura

Tomonori Ichinose

Ryouta Matsubara

Ryousuke Takada

Ryosuke Miyauchi

A circularly polarizing plate in which tint unevenness in an oblique direction can be suppressed when the circularly polarizing plate is applied to an organic EL display device. The circularly polarizing plate includes a polarizer and a phase difference film laminated on one surface side of the polarizer, in which it has a moisture content of 1.8% or less, an absolute value of a chromaticity a* and chromaticity b* are 10 or less at any azimuthal angle, in a case where the chromaticity a* and b* are measured at all azimuthal angles with a polar angle of 40° from a normal direction of the circularly polarizing plate of a laminate, and when a reflectivity is measured at all azimuthal angles with a polar angle of 40° from the normal direction of the circularly polarizing plate of the laminate, the reflectivity is 3.0% or less at any azimuthal angle.

Circularly polarizing plate, organic electroluminescent display device, and display device

The present invention is to provide an optical film having optically anisotropic layer having excellent durability, and a polarizing plate and an image display device using the same. An optical film of the present invention is an optical film having at least an optically anisotropic layer, in which the optically anisotropic layer is a layer obtained by polymerizing a polymerizable liquid crystal composition containing a predetermined liquid crystal compound and a polymerization initiator, and an extrapolated glass transition starting temperature of the optically anisotropic layer is 70&#xb0; C. or higher.

Optical film, polarizing plate, and image display device

A film of 15 to 45 &#x3bc;m thick containing a cellulose acylate and an aromatic ester oligomer having a repeating unit derived from a dicarboxylic acid and a repeating unit derived from a diol, in which the repeating unit derived from a dicarboxylic acid has a ratio m/n of from 0/10 to 3/7, m and n represent a molar proportion of a repeating unit derived from an aliphatic dicarboxylic acid and an aromatic dicarboxylic acid, respectively, and the film satisfies |Rth(590)|&#x2264;50 nm; has a good appearance and is free of deterioration in display performance when the film with a thin thickness is produced in the form of a roll, achieves a high pencil hardness by imparting a high Knoop hardness to the film, even with a hard coat layer provided, and is free of display unevenness on installing the film in a liquid crystal display device.

The polarizing plate of the present invention includes a polarizer and an optical element that rotates a polarization plane of polarized light emitted from the polarizer, an orientation direction on a surface of the optical element on a polarizer side is parallel to an absorption axis of the polarizer, an orientation direction on a surface of the optical element opposite to the polarizer is perpendicular to the absorption axis of the polarizer, and &#x394;nd and a birefringence parameter Rof the optical element fall in a range of a predetermined region in an orthogonal coordinate in which &#x394;nd is indicated along a vertical axis and the birefringence parameter Ris indicated along a lateral axis.

Polarizing plate

The present invention is to provide a polarizing plate exhibiting sufficient adhesiveness between a resin layer and a pressure sensitive adhesive layer and excellent peeling property in reworking process, and an image display device provided with the polarizing plate. The polarizing plate of the present invention includes a polarizer, and the resin layer that is in direct contact with the polarizer, in which the thickness of the polarizer is 20 &#x3bc;m or less, a hydrogen bonding component of a surface free energy of the resin layer is 3.5 mN/m or more, and the thickness of the polarizing plate is 70 &#x3bc;m or less.

Polarizing plate and image display device

A cellulose acylate film containing a cellulose acylate and a sugar ester compound having from 1 to 12 pyranose structures or furanose structures in which at least one hydroxyl group is esterified, the film satisfying 40 nm&#x2266;Re(550)&#x2266;60 nm and 100 nm&#x2266;Rth(550)&#x2266;140 nm, and having a dimensional change of &#x2212;0.5 to 0.5% and an internal haze of at most 0.1%.

Cellulose acylate film, its production method, polarizer and liquid crystal display device

A cellulose acylate film containing a cellulose acylate having a total degree of substitution of from 1.5 to 2.6 and a polycondensate ester, satisfying 3.4&#x2266;Rth(550)/d, 40 nm&#x2266;Re(550)&#x2266;60 nm and 100 nm&#x2266;Rth(550)&#x2266;300 nm, having a film thickness of from 20 to 45 &#x3bc;m and having an internal haze of from 0.005 to 0.07% (d means the film thickness (&#x3bc;m)).

A cellulose acylate film is produced by casting a solution comprising a cellulose acylate resin and a partially ring-opened, styrene/maleic anhydride copolymer. The produced film has improved wet heat durability and low haze.

Cellulose acylate film, method for producing same, polarizer and liquid crystal display device

A glucose compound represented by Formula (I): 

Glucose compound, cellulose composition, cellulose film, polarizing plate and liquid crystal display device

Disclosed is a liquid-crystal display device comprising

Liquid crystal display device

The present invention relates to an optical film produced by stretching a film having a low residual solvent amount in a machine direction followed by heat-treating it at a temperature falling from the glass transition point (Tg) to the melting point (Tm) thereof, which is a cellulose acylate film satisfying the following relations (1) to (6) and containing at least one cellulose acylate and at least one retardation enhancer having an absorption maximum wavelength &#x3bb;max of from 280 nm to 380 nm: (1) 35 nm&#x2266;Re(550)&#x2266;75 nm, (2) 85 nm&#x2266;Rth(550)&#x2266;140 nm, (3) 0 nm&#x3c;&#x394;Re(630&#x2212;450)&#x2266;40 nm, (4) &#x2212;75 nm&#x2266;&#x394;Rth(630&#x2212;450)&#x3c;0 nm, (5) 2.7&#x2266;A+B&#x2266;3.0, and (6) B&#x2267;0, wherein 'A' means a degree of substitution with an acetyl group of said at least one cellulose acylate, and 'B' means a degree of substitution with an acyl group having at least 3 carbon atoms thereof.

Optical film, polarizing plate, and VA-mode liquid crystal display device

An optical compensation sheet for a TN-mode liquid crystal display device is provided and includes a transparent film including one or more layers, and the optical compensation sheet satisfies formulae (1) and (2).40&#x2266;(550)&#x2266;130&#x2003;&#x2003;(1)100&#x2266;(550)&#x2266;200&#x2003;&#x2003;(2)Re(&#x3bb;) is an in-plane retardation value for light at a wavelength of &#x3bb; nm, and Rth(&#x3bb;) is a retardation vale in a thickness direction for light at a wavelength of &#x3bb; nm.

Optical compensation sheet, polarizing plate and TN-mode liquid crystal display device

An optical film is provided and includes a transparent polymer film. The optical film has at least an A1 value defined by Re (450)/Re (550) of from 0.10 to 0.95 and A2 value defined by Re (650)/Re (550) of from 1.01 to 1.50. Re (&#x3bb;) represents the retardation value of the film with respect to light having a wavelength of &#x3bb; nm; and Rth (&#x3bb;) is the retardation value in the thickness direction of film with respect to light having a wavelength of &#x3bb; nm.

Optical film, polarizing plate and liquid crystal display

An optical resin film, which has Re (&#x3bb;) and Rth (&#x3bb;) satisfying retardation requirements (A) to (D), and has an in-plane width direction retardation (Re) variation coefficient of 5% or less and a thickness direction retardation (Rth) variation coefficient of 10% or less: (A) 0.1&#x3c;Re (450)/Re (550)&#x3c;0.95 (B) 1.03&#x3c;Re (650)/Re (550)&#x3c;1.93 (C) 0.4&#x3c;(Re/Rth (450))/(Re/Rth (550)))&#x3c;0.95 (D) 1.05&#x3c;(Re/Rth (650)/(Re/Rth (550))&#x3c;1.9, and a polarizing plate and a liquid crystal display device using the optical resin film.

Growing community of inventors

Minami-ashigara, Japan

Yoshiaki Hisakado