OPTICAL COMPENSATION FILMS

• Main Authors: JANSEN AXEL, RIEGER BERNHARD, HERM ILONA, PAULUTH DETLEF, SIEMANN ULRICH, FIEBRANZ BERND
• Format: Patent
• Language: English; Korean
• Published: 24.08.2010
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; 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; DYES; FREQUENCY-CHANGING; GENERAL PROCESSES OF COMPOUNDING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

PURPOSE: Optical compensation films are provided to increase the contrast depending on the angle of a VALCD(Vertically Aligned Liquid Crystal Display) by improving the dispersion of a TAC film and a compensation film. CONSTITUTION: An optical compensation film is comprised of a cellulose acylate optical compensation film. The optical compensation film includes more than one compound having more than two rings. The one of two chins is an aromatic ring. The mass rate of the compound having more than two rings is 0.5-10 weight% based on the total weight of the compensation film. The optical compensation film has 20-150um thickness, specially 30-100 um thickness.