Abstract: The present invention provides a liquid crystal display method capable of, when a screen thereof is observed through a polarizer such as sunglasses, ensuring an excellent visibility regardless of the angle of observation. In a liquid crystal display device at least having a backlight light source, a liquid crystal cell, and a polarizer disposed on a viewing side of the liquid crystal cell, a white light-emitting diode is used as the backlight light source; and a polymer film having a retardation of from 3,000 nm to 30,000 nm is used so as to be disposed on the viewing side of the polarizer so that an angle between an absorption axis of the polarizer and a slow axis of the polymer film becomes about 45 degrees.

Abstract: The present invention provides a liquid crystal display method capable of, when a screen thereof is observed through a polarizer such as sunglasses, ensuring an excellent visibility regardless of the angle of observation. In a liquid crystal display device at least having a backlight light source, a liquid crystal cell, and a polarizer disposed on a viewing side of the liquid crystal cell, a white light-emitting diode is used as the backlight light source; and a polymer film having a retardation of from 3,000 nm to 30,000 nm is used so as to be disposed on the viewing side of the polarizer so that an angle between an absorption axis of the polarizer and a slow axis of the polymer film becomes about 45 degrees.

Abstract: The present invention intends to provide a display, or an optical film with an adhesive, in which a bend of the display or peeling of the optical film does not occur even when the display or the optical film is used under an environment where a temperature change is large, and birefringence due to deformation of an adhesive can be suppressed stably irrespective of the temperature change, and occurrence of light leakage and the like is suppressed, so that the optical performance is more excellent, by pasting a glass plate and an optical film together with an adhesive in which temperature dependence of the birefringence is zero. The present invention relates to a technique for obtaining the above-described effects, the technique capable of stably providing an adhesive in which both the birefringence and the temperature dependence of the birefringence are zero, the adhesive having a measured value of birefringence of an adhesive ?n0 within a range of ±0.

Abstract: The present invention provides a liquid crystal display method capable of, when a screen thereof is observed through a polarizer such as sunglasses, ensuring an excellent visibility regardless of the angle of observation. In a liquid crystal display device at least having a backlight light source, a liquid crystal cell, and a polarizer disposed on a viewing side of the liquid crystal cell, a white light-emitting diode is used as the backlight light source; and a polymer film having a retardation of from 3,000 nm to 30,000 nm is used so as to be disposed on the viewing side of the polarizer so that an angle between an absorption axis of the polarizer and a slow axis of the polymer film becomes about 45 degrees.

Abstract: Provided is an illumination module capable of preventing a light exit surface from being darker along peripheral edge portions as though having borders. An illumination module (1) includes: a light guiding plate (20), which has an end surface (21) and a first principal surface (23); a light source (30) configured to emit light that enters the end surface (21); and a diffusion plate (50), which has alight incident surface (55) and a light exit surface (56). The diffusion plate (50) includes a protruding part (51), which protrudes toward the light guiding plate (20) side and the light source (30), which is positioned so as to face a peripheral edge portion (26) on the end surface (21) side of the light guiding plate (20), and which has a light incident surface (52) into which light exiting the peripheral edge portion (26) enters.

Abstract: Provided is an illumination module capable of preventing a light exit surface from being darker along peripheral edge portions as though having borders. An illumination module (1) includes: a light guiding plate (20), which has an end surface (21) and a first principal surface (23); a light source (30) configured to emit light that enters the end surface (21); and a diffusion plate (50), which has alight incident surface (55) and a light exit surface (56). The diffusion plate (50) includes a protruding part (51), which protrudes toward the light guiding plate (20) side and the light source (30), which is positioned so as to face a peripheral edge portion (26) on the end surface (21) side of the light guiding plate (20), and which has a light incident surface (52) into which light exiting the peripheral edge portion (26) enters.

Abstract: There are provided an optical film having both low orientation birefringence and low photoelastic birefringence and, at the same time, having excellent transparency and heat resistance, and a polarizing plate including the optical film and a liquid crystal display device. An acrylic copolymer according to the present invention includes as constituent units 0.5 to 35% by mass of N-aromatic substituted maleimide units and 60 to 85% by mass of alkyl (meth)acrylate units having a negative intrinsic birefringence in terms of a homopolymer.

Abstract: Disclosed is an optical film comprising a resin material containing a copolymer of 20 to 90% by weight of methyl methacrylate, 10 to 70% by weight of tert-butylcyclohexyl methacrylate represented by formula (I): and 0 to 20% by weight of a monomer other than methyl methacrylate and tert-butylcyclohexyl methacrylate, the optical film having been produced by drawing an undrawn film formed by melt-extruding the resin material by a factor of 1.4 to 6.0 in terms of area ratio.

Abstract: Disclosed is an optical film produced by a method comprising continuously discharging a molten resin on a casting roll through a die lip of an extruder, wherein the molten resin contains a copolymer of (A) 75 to 99% by weight of an (meth)acrylate monomer that, when homopolymerized, has a negative intrinsic birefringence, and (B) 1 to 25% by weight of an (meth)acrylate monomer that, when homopolymerized, has a positive intrinsic birefringence, and a velocity ratio V2/V1 of 1.2 to 15 is satisfied wherein V1 represents a discharge velocity of the molten resin from the die lip, m/min; and V2 represents a surface velocity of the casting roll, m/min.

Abstract: An optical resin material includes a multicomponent system whose number of components z which is defined under a counting condition of including original number x(x?2) of copolymer into the number of components is three or more. Wherein the combination of the components constituting the multicomponent system is selected such that: at least one of respective signs of intrinsic orientational-birefringences of respective homopolymers which correspond to respective monomers constituting respective components of the copolymer and signs of orientational-birefringence properties which the low-molecular-weight organic compound presents in common in the respective homopolymers has a different sign from those of others, and also, at least one of photoelastic-birefringence properties of the respective homopolymers and photoelastic-birefringence properties which the low-molecular-weight organic compound presents in common in the respective homopolymers has a different sign from those of others.

Abstract: Methods of evaluating birefringence of an adhesive agent, and of designing and producing an adhesive agent using the evaluation method, as well as adhesive agents produced using these methods. A polarizing plate and a liquid crystal display device using the obtained adhesive agent are proposed, as well as methods for producing the same.

Abstract: A copolymer of (meth)acrylic ester represented by a general formula (1) including a following repeating unit A and repeating unit B. In the general formula (1), R1 and R2 each independently represent hydrogen atom or methyl group; R3 represents an alkyl group having 1 to 4 carbon atoms; Y represents an atomic group forming an aromatic ring; x represents 1 to n, n represents the number of fluorine atoms which can be contained in the aromatic ring; and a and b each independently represent an integer of 1 or more.

Abstract: The present invention provides a liquid crystal display method capable of when a screen thereof is observed through a polarizer such as sunglasses, ensuring an excellent visibility regardless of the angle of observation. In a liquid crystal display device at least having a backlight light source, a liquid crystal cell, and a polarizer disposed on a viewing side of the liquid crystal cell, a white light-emitting diode is used as the backlight light source; and a polymer film having a retardation of from 3,000 nm to 30,000 nm is used so as to be disposed on the viewing side of the polarizer so that an angle between an absorption axis of the polarizer and a slow axis of the polymer film becomes about 45 degrees.

Abstract: A copolymer of (meth)acrylic ester represented by a general formula (1) including a following repeating unit A and repeating unit B. In the general formula (1), R1 and R2 each independently represent hydrogen atom or methyl group; R3 represents an alkyl group having 1 to 4 carbon atoms; Y represents an atomic group forming an aromatic ring; x represents 1 to n, n represents the number of fluorine atoms which can be contained in the aromatic ring; and a and b each independently represent an integer of 1 or more.

Abstract: A highly sensitive optical sensor in a simple structure for detecting a chemical substance dissolved or dispersed in water is provided. The optical sensor (1) comprises a detecting element (2) having a polymer thin film, a light source unit (3) for emitting light for irradiating the polymer thin film, and a photodetector (4) for detecting the intensity of light reflected from the polymer thin film. The detecting element (2), the light source unit (3), and the photo-detector (4) are integrally mounted in a housing. The polymer thin film is formed on a highly reflective substrate or an optically transparent substrate so as to interact with a chemical substance dissolved or dispersed in water flowing through a water channel (8).