Abstract: 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?Rth(550)/d, 40 nm?Re(550)?60 nm and 100 nm?Rth(550)?300 nm, having a film thickness of from 20 to 45 ?m and having an internal haze of from 0.005 to 0.07% (d means the film thickness (?m)).

Abstract: An optical film is provided and includes: a transparent support satisfying the following expressions (1) and (2); and an optically anisotropic layer having a ?/4 function. The optical film has an Rth (550) satisfying a relation of |Rth (550)|?20. |Re (550)|?10 ??(1) |?Rth (25° C. 30% RH?25° C80% RH)|?20 ??(2) Re (550) represents an in-plane retardation Re at a wavelength of 550 nm, and Rth (550) represents a retardation Rth in a film thickness direction at a wavelength of 550 nm; and ?Rth (25° C. 30% RH?25° C. 80% RH) represents a difference between Rth (550) at 25° C. and 30% RH and Rth (550) at 25° C.

Abstract: An optical film contains a cellulose acylate film, and at least two layers of an optically anisotropic layer A and an optically anisotropic layer B, wherein the cellulose acylate film satisfies the specific formulae, Re(548) of the optically anisotropic layer A is from 80 to 190 nm and the slow axis of the optically anisotropic layer A is at 45°±10° with respect to the film conveying direction, and the optically anisotropic layer B satisfies the specific formulae.

Abstract: A liquid crystal display device is provided and includes: a liquid crystal cell including a pair of transparent glass substrates each having a transparent electrode, and a nematic liquid crystal between the pair of the transparent glass substrates; and a pair of polarizing plates sandwiching the liquid crystal cell. At least one of the pair of polarizing plates includes a protective film; a polarizer; and an optical compensation film. One of the pair of transparent glass substrates, an adhesive; the optical compensation film; the polarizer; and the protective film are stacked in this order, and they satisfy the following equations (1) to (3): |n1?n2|?0.03??(1) |n2?n3|?0.03??(2) |n1?n3|?0.03??(3) where n1, n2, and n3 indicate average refractive indices at 589 nm of the one of the pair of the transparent glass electrodes, the adhesive; and the optical compensation film, respectively.

Abstract: 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 (?) represents the retardation value of the film with respect to light having a wavelength of ? nm; and Rth (?) is the retardation value in the thickness direction of film with respect to light having a wavelength of ? nm.

Abstract: A liquid crystal display device is provided and includes: a liquid crystal cell including a pair of transparent glass substrates each having a transparent electrode, and a nematic liquid crystal between the pair of the transparent glass substrates; and a pair of polarizing plates sandwiching the liquid crystal cell. At least one of the pair of polarizing plates includes a protective film; a polarizer; and an optical compensation film. One of the pair of transparent glass substrates, an, adhesive; the optical compensation film; the polarizer; and the protective film are stacked in this order, and they satisfy the following equations (1) to (3): |n1?n2|?0.03??(1) |n2?n3|?0.03??(2) |n1?n3|?0.03??(3) where n1, n2, and n3 indicate average refractive indices at 589 nm of the one of the pair of the transparent glass electrodes, the adhesive; and the optical compensation film, respectively.

Abstract: A method for producing a cellulose acylate film, comprising casting a polymer solution that comprises a plasticizer having a number-average molecular weight of 200-10000 and a cellulose acylate to form a web; stretching the web having a residual solvent amount of 100-300% by mass in one direction at from ?30° C. to 30° C.; drying the stretched web to reduce the residual solvent amount from 6-120% by mass to less than 12% by mass while controlling the surface temperature of the web so as not to reach 200° C. or higher; and stretching the resulting film at 60-200° C. in a direction different form the stretching direction of the first stretching.

Abstract: A novel optical compensation film is disclosed. The film comprises a transparent film having a ratio Re/Rth(450 nm) of Re and Rth at 450 nm of 0.4 to 0.95 times as large as Re/Rth(550 nm) at 550 nm, having Re/Rth(650 nm) at 650 nm of 1.05 to 1.93 times as large as Re/Rth(550 nm), and having Rth at 550 nm ranging from 70 nm to 400 nm, where “Re” is an in-plane retardation and “Rth” is a thickness-direction retardation; and an optically anisotropic layer having an in-plane optical anisotropy, formed of a composition comprising a liquid-crystalline compound, in which molecules of the liquid-crystalline compound are fixed in an alignment state, wherein the direction of orthogonal projection, onto a plane of the transparent film, of a mean orientation direction of molecular symmetry axes of the liquid-crystalline compound at the interface on the transparent film side is 45° with respect to the in-plane slow axis of the transparent film.

Abstract: Provided are a liquid crystal display device, in particular, an optical compensation film and a polarizing plate having an excellent optical compensation function for OCB mode liquid crystal display device which has a rapid response speed and a suitability for moving images and capable of further contributing to thinning the liquid crystal display device, as well as the OCB mode liquid crystal display device having a high display grade, the rapid response speed, the suitability for moving images and a high transmittance. For this purpose, a roll-shaped lengthy optical compensation film wherein values of Re(0°), Re(40°) and Re(?40°) thereof are in the ranges of 37±6 nm, 50±6 nm and 124±12 nm, respectively is provided.

Abstract: An optical film is provided and includes a transparent polymer film. The optical film satisfies specific relations of retardation values and has a glass transition temperature of 120° C. or higher.

Abstract: An optical compensation film is provided and includes a cellulose acylate film and an optically anisotropic layer containing a liquid crystalline compound. The cellulose acylate film satisfies specific conditions in relation to substitution degrees of hydroxyl groups in glucose units constituting cellulose of the cellulose acylate film, and has a thickness of 40 to 85 ?m.

Abstract: A polarizing plate including: a protective film; a polarizer; and a polymer substrate, laminated in this order, wherein the polarizer has a thickness of 10 to 25 ?m and a width of 1700 to 2300 mm, and the polymer substrate has a thickness of 30 to 70 ?m.

Abstract: A liquid crystal display of OCB mode or VA mode comprises a backlight unit, a backlight-side polarizing plate, a liquid crystal cell of OCB mode or VA mode, and a viewer-side polarizing plate in order. The viewer-side polarizing plate comprises a first transparent protective film, a polarizing membrane, a second transparent protective film and a light-diffusing layer in order. In the liquid crystal display of OCB mode, an optically anisotropic layer is formed from liquid crystal compound on the first transparent protective film. The first transparent protective film is a cellulose acetate film having a Re retardation value of 20 to 70 nm and a Rth retardation value of 100 to 500 nm. The light-diffusing layer comprises transparent resin and transparent fine particles dispersed therein. The transparent resin and the transparent fine particles have refractive indices that are different from each other.

Abstract: A polarizing plate comprises a light-scattering polarizing element and a light-absorbing polarizing element. The elements are so arranged that the polarizing transmission axis of the light-scattering polarizing element is essentially parallel to the polarizing transmission axis of the light-absorbing polarizing element. The light-scattering polarizing element has a polarizing layer comprising an optically isotropic continuous phase and an optically anisotropic discontinuous phase.

Abstract: Disclosed is a polarizing plate comprising a protective film and a liquid crystal display device that utilizes the polarizing plate, wherein the protective film has a moisture permeability of 1 g/m2/24 h to 100 g/m2/24 h.

Abstract: An optical compensation film is provided and includes a cellulose acylate film and an optically anisotropic layer containing a liquid crystalline compound. The cellulose acylate film satisfies specific conditions in relation to substitution degrees of hydroxyl groups in glucose units constituting cellulose of the cellulose acylate film, and has a thickness of 40 to 85 ?m.

Abstract: An optical film is provided and includes a transparent polymer film. The optical film satisfies specific relations of retardation values and has a glass transition temperature of 120° C.

Abstract: A liquid crystal cell of bend alignment mode or hybrid alignment mode should be optically compensated suitably enough to display an image of high contrast. In the displayed image, change of hue is little, and no inversion of gradation is observed. In a liquid crystal display having a liquid crystal cell of bend alignment mode and a pair of polarizing plates, one of the polarizing plates comprises a polarizing membrane and two optically anisotropic layers. A first optically anisotropic layer is made from discotic compounds oriented in hybrid alignment, and is placed so that a direction giving the maximum refractive index in plane may be essentially at 45° to a transmission axis in plane of the polarizing membrane. The second optically anisotropic layer consists of a cellulose ester film, and is placed so that a direction giving the maximum refractive index in plane may be essentially parallel or perpendicular to a transmission axis in plane of the polarizing membrane.

Abstract: An optical compensation film is provided and has a cellulose acylate film coated with an optically anisotropic layer containing a liquid crystalline compound, cellulose having a glucose unit, a hydroxyl group of the glucose unit being substituted with an acyl group having at least two carbon atoms. The cellulose acylate film satisfies relationships specified in the specification.

Abstract: In a liquid crystal display device, a light source, a light-scattering or light-reflecting polarizer, a light-absorbing polarizer, liquid crystal cells, and a light-absorbing polarizer are disposed in this order. A light source side transparent protecting film of the light-absorbing polarizer on the light source side uses a transparent polymer film whose in-plane retardation value and retardation value of the thickness direction are low.