Abstract:
Provided is a method of preparing a resin composition for an optical film. The method includes forming a four-component copolymer by reacting an alkyl(meth)acrylate-based monomer, an acrylate-based monomer containing a benzene ring, and a (meth)acrylic acid monomer by using a continuous bulk polymerization method; and forming a resin composition for an optical film by removing unreacted monomer and solvent from a reaction product in a devolatilizer.
Abstract:
The light emitting device includes a first conductive semiconductor layer; a second conductive semiconductor layer on the first conductive semiconductor layer; and an active layer between the first and second conductive semiconductor layers. The active layer includes a plurality of well layers and a plurality of barrier layers, wherein the well layers include a first well layer and a second well layer adjacent to the first well layer. The barrier layers include a first barrier layer disposed between the first and second well layers, and the first barrier layer includes a plurality of semiconductor layers having an energy bandgap wider than an energy bandgap of the first well layer. At least two layers of the plurality of semiconductor layers are adjacent to the first and second well layers, and have aluminum contents greater than that of the other layer.
Abstract:
Provided are an apparatus and a method for measuring battery capacity fade. The apparatus for measuring battery capacity fade includes: at least one battery used in a hybrid vehicle, a plug-in hybrid electric vehicle or an electric vehicle; a sensing unit sensing current, voltage and temperature of the at least one battery; a data processing unit measuring voltage and current data from the sensing unit if the current is constant current in a charging period and state of charge (SOC) is in a predetermined region; and a calculating unit setting at least two points on the voltage data and applying the voltage data corresponding to the at least two points to an equivalent circuit model of the at least one batter, to calculate faded capacity.
Abstract:
There is provided a method for preparing an acrylic copolymer resin for an optical film includes: suspension-polymerizing an acrylic monomer containing a benzene ring, an alkyl(meth)acrylate monomer, and a (meth)acrylic acid monomer to prepare a copolymer; and thermally treating the copolymer at a temperature ranging from 240° C. to 300° C. As the method for preparing an acrylic copolymer of the present invention, a resin having an effectively lowered CTE can be manufactured by inducing the formation of a glutaric anhydride structure by using suspension polymerization that facilitates adjustment of the molecular weight of a resin.
Abstract:
The present invention relates to acryl-based copolymers including an alkyl(meth)acrylate-based monomer; a (meth)acrylate-based monomer containing an aromatic ring; and a maleimide-based monomer, a resin composition including the same, and an optical film prepared by using the same.
Abstract:
The present invention relates to an acrylic copolymer having high heat resistance and high strength, and an optical film comprising the same, and more particularly, to an acrylic copolymer for optical films in which alkyl (meth)acrylate monomers; (meth)acrylate monomers comprising aromatic rings and/or aliphatic rings; and (meth)acrylamide monomers are included and polymerized. An acrylic copolymer according to the present invention is excellent in heat resistance while maintaining transparency. Further, an optical film comprising a compound resin including the acrylic copolymer has superior transparency and heat resistance and is excellent in formability, adhesion, retardation properties, and durability.
Abstract:
A mobile image forming apparatus is provided that comprises a casing, a support frame to surround a printing medium roll from which a printing medium is supplied and to guide the printing medium, an image forming unit to form an image on the printing medium guided by the support frame and a printing medium receiving portion disposed between the casing and the support frame to receive therein the printing medium on which the image is formed by the image forming unit. The mobile image forming apparatus may further comprise a roll support core disposed in the support frame to rotatably support the printing medium roll.
Abstract:
A cathode active material composition includes a cathode active material, a water-based binder, and a transition metal oxide. A cathode is prepared using the cathode active material composition. A lithium battery includes the cathode. The lithium battery has improved high-rate characteristics and lifespan characteristics by preventing an increase in internal resistance due to the corrosion of an electrode base material.
Abstract:
Provided is an apparatus and method for encoding/decoding moving pictures based on adaptive scanning. The moving picture apparatus and method can increase a compression rate based on adaptive scanning by performing intra prediction onto blocks of a predetermined size, and scanning coefficients acquired from Discrete Cosine Transform (DCT) of a residue signal and quantization differently according to the intra prediction mode. The moving picture encoding apparatus includes: a mode selector for selecting and outputting a prediction mode; a predictor for predicting pixel values of pixels to be encoded of an input video based on the prediction mode to thereby output a residue signal block; a transform/quantization unit for performing DCT onto the residue signal block and quantizing the transformed residue signal block; and an encoder for adaptively scanning and encoding the quantized residue signal block based on the prediction mode.
Abstract:
An image forming apparatus having a first image forming unit and a second image forming including a printing medium supplier which supplies a printing medium, a selection guide which selectively guides the printing medium from the printing medium supplier to one of a first supplying path of the first image forming unit and a second supplying path of the second image forming unit, and a first feed roller which is disposed between the selection guide and the printing medium supplier, and transfers the printing medium from the printing medium supplier to the selection guide.