BIAXIAL OPTICAL POLYNORBORNENE FILM AND METHOD OF MANUFACTURING THE SAME, INTEGRATED TYPE OPTICAL COMPENSATION POLARIZING PLATE PROVIDED THEREWITH AND METHOD OF MANUFACTURING THE SAME, AND LIQUID CRYSTAL DISPLAY PROVIDED WITH THE FILM AND/OR THE POLARIZING PLATE

• Main Authors: CHUN SUNG HO, NIKOLAI MALIMONENKO, KIM WON KOOK, PAIK KYUNG LIM, SERGEY BELYAEV
• Format: Patent
• Language: English
• Published: 24.12.2010
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; GENERAL PROCESSES OF COMPOUNDING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PROBLEM TO BE SOLVED: To provide a method of manufacturing a retardation film excellent in translucency, having a uniform in-plane phase difference value, and capable of providing both roles as a negative C plate and A plate. SOLUTION: The method of manufacturing the biaxial optical polynorbornene film includes a step of preparing a composition containing a polynorbornene polymer, by using a mixed solvent of a high-boiling point solvent with a boiling point difference of ≥20°C and a low-boiling poing solvent to dissolve the polynorbornene polymer, in which a content of the high-boiling point solvent is 0.1-15 wt.% based on a weight of the polynorbornene polymer, a step of drying partially the composition by casting, to obtain a polynorbornene film containing the mixed solvent within a range of 1-6 wt.% based on total weight of the polynorbornene film, and a step of uniaxial-stretching the partially dried film along one direction in parallel to a film face, at a stretching temperature of ≤+ 20°C of a boiling point of the high-boiling point solvent, followed to be dried at the boiling point of the high-boiling point solvent or more, while maintaining a stretched state. COPYRIGHT: (C)2011,JPO&INPIT