Retardation film, polarizing plate and liquid crystal display

• Main Authors: TAMAGAWA, MINORI, KUZUHARA, NORIYASU
• Format: Patent
• Language: Chinese; English
• Published: 16.12.2007
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; 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; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; POLYSACCHARIDES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

Disclosed is a retardation film which is improved in display quality by suppressing variation in the retardation value due to moisture that was a problem involved in the conventional cellulose retardation films. Also disclosed are a polarizing plate and a liquid crystal display. The retardation film is characterized by containing a cellulose derivative and an esterified compound which is obtained by esterifying a part or all of the OH groups in a compound (A) having one furanose structure or pyranose structure or in a compound (B) wherein not less than 2 but not more than 12 of at least either of the furanose structures or the pyranose structures are bonded.