Konica Corporation

Konica Minolta Opto, Inc.

Konica-minolta Holdings, Inc.

Konica Corporation, a Corporation of Japan

Hiroki Umeda

Noriyasu Kuzuhara

Takatoshi Yajima

Koji Tasaka

Nobuo Kubo

Sota Kawakami

Makoto Honda

Toshiaki Shibue

Nobuyuki Takiyama

Shinji Inagaki

Minori Tamagawa

Takashi Murakami

Isamu Michihata

Takahiro Takagi

Koichi Saito

Katsusuke Nagashima

A manufacturing method for an optical film via a solution casting method on a transparent substrate film comprising the steps of: (i) ejecting a micro-particle dispersion containing micro-particles having a average particle diameter of at least 25-200 nm as liquid droplets by use of an ink-jet head when a residual solvent content in a web is 5-400 weight %, and (ii) depositing the liquid droplets to adhere onto one side surface of a web and to form a micro convex structure, and further to form 1-10,000 points of convex parts per 10,000 &#x3bc;mhaving a height of the convex parts of the convex structure of 0.01-0.5 &#x3bc;m.

Manufacturing method for optical film

The method to produce the vertical alignment type liquid crystal display employs

Method for producing vertical alignment liquid crystal display

Disclosed is an optically anisotropic film used for a liquid crystal display of a vertical alignment liquid crystal mode comprising a fatty acid cellulose aster film, a retardation value (Rt value) in the thickness direction of the fatty acid cellulose ester film is from 60 to 300 nm, and the number of luminescent points having a size exceeding 50 &#x3bc;m is zero per 250 mm, and the number of luminescent points having a size of 5 to 50 &#x3bc;m is 200 or less per 250 mmwhen the fatty acid cellulose ester film is observed with two polarizing plates being provided on both surfaces of the fatty acid cellulose ester film so as to shield transmission light.

Optical film and liquid crystal display using the same

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 retardation film manufactured as a long roll film having a slow axis in a lateral direction of the long roll film, wherein an elastic modulus in an in-plane slow axis direction &#x3b5;and an elastic modulus in an in-plane fast axis direction &#x3b5;meet Condition (1), the in-plane fast axis direction being perpendicular to the in-plane slow axis direction:1.26&#x2266;&#x3b5;/&#x3b5;&#x2266;2.60&#x2003;&#x2003;Condition (1).

Retardation film, polarizing plate and vertical alignment mode 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

A polarization plate comprising a polarizer and polarizing plate protective films A and B provided on both surfaces of the polarizer, wherein (i) a thickness of each of the polarizing plate protective films A and B is 30 to 60 &#x3bc;m; (ii) in-plate retardation value Ro of the polarizing plate protective film B is 20 to 100 nm; (iii) retardation value Rt in the thickness direction of the polarizing plate protective film B is 10 to 300 nm; (iv) a thickness of the polarizing plate is 80 to 160 &#x3bc;m; (v) a stiffness of the polarizing plate of the polarizing plate under a condition of 23&#xb0; C. and 55% RH is 20 to 80 g.

Polarizing plate and display device

A polarizing plate comprises a polarizing element; and a hydrophilic polymer film adhered on the polarizing element and having an in-plane orientation. The transmittance of the polarizing plate as a single unit for light having a wavelength of 590 nm is 40% or more under an environment of 23&#xb0; C. and 55% RH, the crossed-Nichols transmittance T2 of the polarizing plate is 0.03% or less under an environment of 23&#xb0; C. and 55% RH, and a change &#x394;T2 in the transmittance T2 of the polarizing plate when the relative humidity changes from 20% RH to 80% RH at 23&#xb0; C. satisfies the following formula:0.05&#xd7;T2&#x3c;&#x394;T2&#x3c;0.9&#xd7;T2.

Polarizing plate and liquid crystal display device

A liquid crystal display device comprising a liquid crystal display in which polarizing plates A and B are provided so as to be held between a vertical orientation mode crystal cell and the corresponding liquid crystal cell, wherein the polarizing layer A comprises the polarizing plate protective films Aand Aand the polarizing layer B comprises the polarizing plate protective films Band B, and at least one of the polarizing plate protective films Aand Bthat are disposed at the liquid crystal cell side is a cellulose ester film Y that simultaneously satisfies the condition that retardation value Ro is 0 to 10 nm and Rt is &#x2212;20 to 20 nm shown by the equation below, and at least one of the polarizing plate protective films Aand Bis the optical compensation film W which has an optically anisotropic layer.

Liquid crystal display device

A film bonded to a polarizer of a polarizing plate, has a surface A and a surface B opposite to the surface A; and a thickness of 10 &#x3bc;m to 70 &#x3bc;m; wherein a refractive index difference between the surface A and the surface B is 5&#xd7;10to 5&#xd7;10.

Retardation film, manufacturing method thereof, polarizing plate and liquid crystal display apparatus

An optically anisotropic film is disclosed. The film comprises a fatty acid cellulose ester film support having an acetyl group and a propionyl group, and a liquid crystal layer containing a liquid crystal compound, or a resin layer containing polyimide, polyamidoimide, polyamide, polyether imide, polyether ether ketone, polyether ketone, polyketone sulfide, polyether sulfone, polysulfone, polyphenylene sulfide, polyphenylene oxide, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyacetal, polycarbonate, polyallylate, acrylic resin, polyvinyl alcohol, polypropylene, cellulose based plastics, epoxy resin, or phenol resin.

A method for producing a roll of an optical compensation film, in the effective width of which an angle of the slow axis in the film face with the width direction of the film is within the range of &#xb1;1&#xb0; and an angle of the fast axis in the film face with the length direction of the film is within the range of &#xb1;1&#xb0;, wherein the angle of the fast axis in the film face with the length direction is cyclically varied by a cycle of from 1.5 m to 500 m in the length direction of the film and the minimum amplitude of the variation is within the range of from 0.1&#xb0; to 1&#xb0;.

Optical compensation film, polarizing plate, displaying apparatus, method for producing optical compensation film and method for producing polarizing plate

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.

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Hino, Japan

Hiroki Umeda