Konica Corporation

Konica Minolta Opto, Inc.

Konica-minolta Holdings, Inc.

Konica Minolta, Inc.

Koji Tasaka

Noriyasu Kuzuhara

Hiroki Umeda

Takatoshi Yajima

Nobuo Kubo

Nobuyuki Takiyama

Shigeki Oka

Takashi Murakami

Shigeto Ohmori

Hirokazu Sato

Akira Sato

Masaru Iwagaki

Sota Kawakami

Isamu Michihata

Kunio Shimizu

Takahiro Takagi

Takashi Takebe

Kazuhiro Miyazawa

Minori Tamagawa

Hirokazu Koyama

Kouji Tashiro

Koichi Saito

Rieko Ren

Shinji Inagaki

A circularly polarizing plate has a polarizer and two &#x3bb;/4 plates (T1, T2) bonded respectively onto both sides of the polarizer so as to face each other, the circularly polarizing plate is characterized in that the in-plane retardation values Ro of the &#x3bb;/4 plates (T1) and the &#x3bb;/4 plates (T2) satisfy (a) to (c) below in an environment with a temperature of 23&#xb0; C. and RH of 55%. (a) The in-plane retardation value Ro of the &#x3bb;/4 plates (T1), when measured within the range of 450 to 650 nm, is 3.0 to 20.0 nm smaller than the in-plane retardation value Ro of the &#x3bb;/4 plates (T2). (b) The in-plane retardation value Ro of the &#x3bb;/4 plates (T1) (450) falls within the range of 110 to 140 nm. (c) The in-plane retardation value Ro of the &#x3bb;/4 plates (T2) (650) falls within the range of 145 to 165 nm.

Circularly polarizing plate and three-dimensional image display apparatus

A cellulose ester film containing a polyester represented by Formula (1) or (2), wherein an in-plane retardation value (Ro) is 0 to 5 nm and a retardation value in a thickness direction (Rt) is &#x2212;20 to 10 nm, Ro and Rt being measured at 23&#xb0; C. and 55% RH:B-(G-A-)G-B&#x2003;&#x2003;Formula (1)

Cellulose ester film, polarizing plate for in-plane-switching mode display and in-plane-switching mode display using the cellulose ester film

A liquid crystal display comprising: a brightness enhancing film, polarizing plate (A), a liquid crystal cell, polarizing plate (B) laminated in that order, Wherein (i) polarizing plate (A) has a polarizing plate protective film facing the brightness enhancing film; (ii) the polarizing plate protective film is a cellulose ester film; (iii) an in-plane retardation value Ro(550) of the of the cellulose ester film represented by Formula (I) is 0 to 5 nm; and (iv) a retardation value in a thickness direction Rt(550) of the of the cellulose ester film represented by Formula (II) is &#x2212;15 to 15 nm,(550)=()&#xd7;&#x2003;&#x2003;Formula (I)(550)={()/2&#x2212;&#x2003;&#x2003;Formula (II)

Liquid crystal display

A manufacturing method of an optical film provided with a convexoconcave structure, comprises the steps of: coating a resin solution including a first resin solved by a solvent onto an endless or roll-like mold provided with a convexoconcave structure, and forming a resin solution layer on the mold; laminating a film substrate onto the resin solution layer to make a laminated film before the solvent in the resin solution layer is completely dried, the film substrate including a second resin, which is capable of absorbing the solvent or is soluble by the solvent; and peeling the laminated film from the mold before the solvent in the laminated film is completely dried.

Method for manufacturing an optical film having a convexoconcave structure

A manufacturing method of a cellulose ester film satisfying the relationships, Nx&#x3e;Ny&#x3e;Nz, and 0.8&#x2266;R/R&#x2266;3.5, the method comprising casting a cellulose ester dope containing a solvent of a good solvent and a poor solvent on a support to form a web; peeling the web from the support; transporting the peeled web (step D); holding the edges in the transverse direction of the web (step A); stretching the resulting web in the transverse direction while applying a tension; reducing the tension in the transverse direction of the web; and drying the stretched web, wherein the residual solvent content of the web is 5 to 90% by weight at the beginning in the step A, and the residual poor solvent content in the residual solvent content of the web is from 15 to 95% by weight at the terminal point in the Step D

Cellulose ester film, its manufacturing method, optical retardation film, optical compensation sheet, elliptic polarizing plate, and image display

A cellulose ester film comprising a compound represented by Formula (1): Formula (1) B-(G-A)n-G-B, wherein B represents a benzene monocarboxylic acid residue; G represents an alkylene glycol residue having 2-12 carbon atoms, an aryl glycol residue having 6-12 carbon atoms, or an oxyalkylene glycol residue having 4-12 carbon atoms; A represents an alkylene dicarboxylic acid residue having 4-12 carbon atoms or an aryldicarboxylic acid residue having 6-12 carbon atoms; and n represents an integer of 1 or more.

Cellulose ester film, polarizing plate and liquid crystal display

A polarizing plate used in a vertical alignment mode liquid crystal display comprising a liquid crystal cell is disclosed, wherein the polarizing plate comprises a polarizing film and a mixed fatty acid cellulose ester film with optical biaxiality provided between the polarizing film and the liquid crystal cell, and wherein the mixed fatty acid cellulose ester film has a retardation in plane R0 of from 31 to 120 nm, and a retardation in the thickness direction Rt of from 60 to 300 nm, in which R0 is represented by the following formula (1) and Rt is represented by the following formula (2):0=()&#xd7;&#x2003;&#x2003;formula (1)={()/2&#x2212;&#x2003;&#x2003;formula (2)

Polarizing plate and liquid crystal display employing the same

An optical compensation film wherein: (i) molecules of a liquid crystalline compound are oriented in a manner that an average tilt angle of the compounds is not more than 4 degrees; (ii) the orientation is fixed; (iii) Ro(&#x3bb;) values are: at wavelength 589 nm: 40-130 nm; at 600 nm: 35-125 nm; and at 630 nm: 35-120 nm; (iv) Rt(&#x3bb;) value are 120-400 400 nm in &#x3bb; range of 500-630 nm; and (v) Values of Ro(589), Ro(600) and Ro(630) satisfy the following formulae:1.0&#x3c;&#x3c;7.0=((589)&#x2212;(630))/((600)&#x2212;(630)).

Optical compensation film, polarizing plate and liquid crystal display

A manufacturing method of a cellulose ester film satisfying the relationships, Nx&#x3e;Ny&#x3e;Nz, and 0.8&#x2266;R/R&#x2266;3.5, the method comprising casting a cellulose ester dope containing a solvent of a good solvent and a poor solvent on a support to form a web; peeling the web from the support; transporting the peeled web (step D0); holding the edges in the transverse direction of the web (step A); stretching the resulting web in the transverse direction while applying a tension; reducing the tension in the transverse direction of the web; and drying the stretched web, wherein the residual solvent content of the web is 5 to 90% by weight at the beginning in the step A, and the residual poor solvent content in the residual solvent content of the web is from 15 to 95% by weight at the terminal point in the Step D0.

An optical compensation sheet comprising at least two optically anisotropic layers each formed by orienting an optically anisotropic compound, the orientation direction in the optically anisotropic layer plane of the optically anisotropic compound in the two optically anisotropic layers intersecting each other at an angle of from 80 to 100 degrees, wherein, viewing the two layers from one side of the sheet, one of the two layers, when the compound is uniaxial, is oriented so that a first angle of optic axis of the uniaxial optically anisotropic compound to the sheet plane increases continuously or stepwise in the thickness direction of the sheet, or when the compound is biaxial, is oriented so that a second angle of a direction giving maximum refractive index of the biaxial optically anisotropic compound to the sheet plane increases continuously or stepwise in the thickness direction of the sheet, and the other layer, when the compound is uniaxial, is oriented so that the first angle decreases continuously or stepwise in the thickness direction of the sheet, or when the compound is biaxial, is oriented so that the second angle decreases continuously or stepwise in the thickness direction of the sheet.

Optical compensation sheet and liquid crystal display

An optical compensation film used for a liquid crystal display comprising a support and an optically anisotropic layer is disclosed. The optically anisotropic layer is a layer on which orientation of the liquid crystalline compound is fixed and the support is an optically biaxial cellulose ester film. A polarizing plate used for a liquid crystal display and a liquid crystal display employing the optical compensation film are also disclosed.

A polarizing plate used in a vertical alignment mode liquid crystal display comprising a liquid crystal cell is disclosed, wherein the polarizing plate comprises a polarizing film and a mixed fatty acid cellulose ester film with optical biaxiality provided between the polarizing film and the liquid crystal cell, and wherein the mixed fatty acid cellulose ester film has a retardation in plane Rof from 31 to 120 nm, and a retardation in the thickness direction Rt of from 60 to 300 nm, in which Ris represented by the following formula (1) and Rt is represented by the following formula (2):0=()&#xd7;&#x2003;&#x2003;formula (1)={()/2&#x2212;.&#x2003;&#x2003;formula (2)

Polarizing plate having cellulose ester films on opposite sides thereof and liquid crystal display employing the same

An optical compensation film comprising a cellulose ester film is disclosed. In the film, (a) each of photoelastic coefficient C(md) in a mechanical direction and photoelastic coefficient C(td) in the transverse direction of the cellulose ester film is 1&#xd7;10to 1&#xd7;10Paand C(md)&#x3c;C(td), (b) retardation Rwithin the plane of the cellulose film defined by Formula (I) is 20 to 70 nm, (c) retardation Rof the cellulose ester film in a thickness direction, defined by Formula (II) is 70 to 400 nm, and (d) both of a dimensional variation ratio S(md) in the mechanical direction and a dimensional variation ratio S(td) in the transverse direction of the cellulose ester film prior to and after being allowed to stand at ambient conditions of 80&#xb0; C. and 90 percent relative humidity for 50 hours are &#x2212;1 to 1 percent, |S(md)|&#x3e;|S(td)|, and C(td)&#xd7;|S(td)|&#x3c;C(md)&#xd7;|S(md)|.

Optical compensation film, viewing angle compensation integral type polarizing plate and liquid crystal display apparatus

A polarizing plate used in a vertical alignment mode liquid crystal display comprising a liquid crystal cell is disclosed, wherein the polarizing plate comprises a polarizing film and a mixed fatty acid cellulose ester film with optical biaxiality provided between the polarizing film and the liquid crystal cell, and wherein the mixed fatty acid cellulose ester film has a retardation in plane Rof from 31 to 120 nm, and a retardation in the thickness direction Rt of from 60 to 300 nm, in which Ris represented by the following formula (1) and Rt is represented by the following formula (2):0=()&#x2003;&#x2003;formula (1)={()/2&#x2212;&#x2003;&#x2003;formula (2)

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Hino, Japan

Koji Tasaka