Patent application number | Description | Published |
20100046105 | Optical Sheet For High Resolution, Filter Comprising The Same, And Display Device Having The Sheet Or The Filter - Provided are an optical sheet for high resolution, a filter comprising the same, and a display device having the optical sheet for high resolution or the filter. The optical sheet for high resolution includes: a plurality of external light absorption units that are disposed separate from each other at a predetermined interval and comprise a light absorbing material; a plurality of light transmission units optically separated from each other by the external light absorption units, wherein the refractive index of the light transmission unit is smaller than the refractive index of the external light absorption unit. Thus, the optical sheet for high resolution, the filter comprising the same, and the display device having the optical sheet for high resolution or the filter can maintain high resolution by reducing generation of ghost images and moiré phenomenon and improving the contrast ratio. | 02-25-2010 |
20110043920 | OPTICAL SHEET WITH HIGH CONTRAST RATIO AND FILTER COMPRISING THE SAME, AND IMAGE DISPLAYING DEVICE INCLUDING THE SHEET OR THE FILTER - An optical sheet for enhancing contrast ratio, a filter including the same, and an image display device including the optical sheet or the filter. The optical sheet includes: a light transmission portion including a plurality of grooves disposed at predetermined intervals in an end portion of the light transmission portion on one side; and a plurality of external light absorption portions each disposed in said each groove and comprising a composition completely or incompletely filling the groove, the composition comprising a light absorbable material, wherein at least one of the grooves comprises a recess portion formed on the top of the external light absorption portion. When used in the image display device, the optical sheet and the filter including the optical sheet can achieve a relatively high light transmission rate, prevent formation of ghost images, prevent the occurrence of the Moire phenomenon, and achieve a relatively high contrast ratio to maintain high resolution. | 02-24-2011 |
Patent application number | Description | Published |
20080319157 | METHOD FOR PRODUCING NORBORNENE MONOMER COMPOSITION, NORBORNENE POLYMER PREPARED THEREFROM, OPTICAL FILM COMPRISING THE NORBORNENE POLYMER, AND METHOD FOR PRODUCING THE NORBORNENE POLYMER - Disclosed is a method for producing a norbornene monomer composition, a norbornene polymer produced using the norbornene monomer composition, an optical film including the norbornene polymer, and a method for producing the norbornene polymer. The method includes reacting a reaction solution that contains cyclopentadiene, dicyclopentadiene, or a mixture of cyclopentadiene and dicyclopentadiene, an acetate compound, and a solvent so that a content of an exo isomer is 50 mol % or more. Variables such as a reaction temperature, a reaction time, a molar ratio between reactants, and addition of a solvent are controlled so that the exo isomer is contained in content of 50 mol % or more. Accordingly, it is possible to industrially produce an acetate norbornene addition polymer by using the acetate norbornene monomer composition containing the exo isomer in content of 50 mol % or more. | 12-25-2008 |
20090092769 | METHOD FOR POLYMERIZING CYCLOOLEFIN POLYMER CONTAINING POLAR FUNCTIONAL GROUPS AND ELECTRONIC DEVICES EMPLOYING THE POLYMERIZED CYCLOOLEFINS - Disclosed is a method for preparing a cycloolefin polymer containing polar functional groups, comprising: preparing a catalyst mixture including i) a precatalyst, containing a Group 10 transition metal having a ligand containing oxygen ions bonded to the metal; ii) a first cocatalyst which is an organic compound containing a Group 15 element; and iii) a second cocatalyst which is capable of providing an anion and weakly coordinating to the metal of the precatalyst; and subjecting a monomer solution comprising a norbornene-based compound containing a polar functional group to an addition polymerization reaction in the presence of an organic solvent and the catalyst mixture, at a temperature of 80-200° C., the total amount of the organic solvent being 50-800% by weight based on the total weight of the monomer contained in the monomer solution, and the product yield of the polymer being 50% by weight or more based on the total weight of the monomer. | 04-09-2009 |
20090192277 | Method of producing cyclic olefin polymers having polar functional groups, olefin polymer produced using the method and optical anisotropic film comprising the same - A method of producing a cyclic olefin polymer having a polar functional group and a high molecular weight with a high yield in which a catalyst is not deactivated due to polar functional groups, moisture and oxygen is provided. According to the olefin polymerization method, deactivation of a catalyst due to polar functional groups of monomers can be prevented, and thus a polyolefin having a high molecular weight can be prepared with a high yield, and the ratio of catalyst to monomer can be less than 1/5000 due to good activity of the catalyst, and thus removal of catalyst residues is not required. | 07-30-2009 |
20090295000 | Biaxial-optical polynorbornene-based film and method of manufacturing the same, integrated optical compensation polarizer having the film and method of manufacturing the polarizer, and liquid crystal display panel containing the film and/or polarizer - Disclosed is a method of manufacturing a biaxial polynorbornene-film having a compensation film which has good light transmittance and a uniform in-plane retardation value and can function as both a negative C-plate and an A-plate. | 12-03-2009 |
20100036071 | Method of polymerizing cyclic olefins and vinyl olefins, copolymer produced by the method and political anisotropic film comprising the same - A method of copolymerizing cyclic olefins and polar vinyl olefins, a copolymer produced by the method, and an optical anisotropic film including the copolymer are provided. According to the copolymerization method, a cyclic olefin and a polar vinyl olefin can be effectively copolymerized using a catalyst system composed of a compound containing a group 13 element and a radical initiator. The resulting copolymer is transparent, and has high adhesion, thermal stability, optical anisotropy and strength, and a low dielectric constant. The optical film including the copolymer can be used as a plastic lens, a polarizer protective film, an adhesive film, and a compensation film, and in a LCD display. | 02-11-2010 |
20110245069 | CATALYST SYSTEM FOR PREPARING CYCLIC OLEFIN ADDITION POLYMER, CYCLIC OLEFIN ADDITION POLYMER PREPARED BY USING THE CATALYST SYSTSEM AND METHOD FOR PREPARING THE SAME - The present invention relates to a catalyst system for preparing a cyclic olefin addition polymer, a method for preparing the catalyst system and a cyclic olefin addition polymer prepared by the method, and more particularly to the method comprising the steps of contacting some content of norbornene-based monomer having a specific polar functional group with a catalyst system comprising a) a Group X transition metal compound; b) a compound comprising a neutral Group XV electron donor ligand having a cone angle of at least 160°; and c) a salt capable of offering an anion that can be weakly coordinated to the transition metal of the a) the Group X transition metal compound. | 10-06-2011 |