ANTIGLARE HARD COAT FILM, AND POLARIZING PLATE AND IMAGE DISPLAY APPARATUS USING THE SAME

• Main Authors: KISHI ATSUSHI, KURAMOTO HIROTAKA, HAMAMOTO DAISUKE, TSUNO NAOKI
• Format: Patent
• Language: English
• Published: 07.03.2013
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

PROBLEM TO BE SOLVED: To provide an antiglare hard coat film which has excellent antiglare properties and a low haze value and prevents white blur when viewed from an oblique direction, so that the depth of black can be improved.SOLUTION: The antiglare hard coat film comprises an antiglare hard coat layer containing fine particles on at least one surface of a transparent plastic film base material, and has a haze value of 5-30%. According to an unevenness cycle obtained by applying the Fourier analysis to an uneven shape of the surface of the antiglare hard coat layer, the maximum value of a power spectrum as a function of the convexity width in the range of 1-1000 μm is equal to or greater than 0.05 and less than 0.15, where the convexity width is defined by a half of the cycle (frequency) in the obtained power spectrum in units of μm, and the ratio b/a of the maximum value (b) of the power spectrum for the convexity width of 15-1000 μm to the maximum value (a) of the power spectrum for the convexity width equal to or greater than 1 μm and less than 15 μm is equal to or less than 2.5.