LIGHT-DIFFUSING FILM AND PRODUCTION METHOD THEREOF, LIGHT-DIFFUSING POLARIZING PLATE, AND LIQUID CRYSTAL DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide a light-diffusing film having high frontal contrast and a wide viewing angle, preventing color irregularity and showing good visibility, and to provide a light-diffusing polarizing plate and a liquid crystal display device using the film.SOLUTION: The light-diffusing...

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Bibliographische Detailangaben
Hauptverfasser:	KANEMITSU AKIYOSHI, TANAKA TOMOKO
Format:	Patent
Sprache:	eng
Schlagworte:	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 LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a light-diffusing film having high frontal contrast and a wide viewing angle, preventing color irregularity and showing good visibility, and to provide a light-diffusing polarizing plate and a liquid crystal display device using the film.SOLUTION: The light-diffusing film comprises a base film 101 and a light-diffusing layer 102 layered on the base film 101 and comprising light-transmitting fine particles 104 dispersed in a light-transmitting resin 103. The light-transmitting fine particles 104 have a weight average particle diameter r of 5 μm or more and less than 15 μm. The light-diffusing layer 102 has an average film thickness d of 10 μm or more and 20 μm or less, and shows film thickness irregularity of 20% or less, the film irregularity defined by the maximum film thickness and the minimum film thickness in accordance with a formula of A (%)=100×((maximum film thickness)-(minimum film thickness))/(maximum film thickness). The light-diffusing film is applied to the light-diffusing polarizing plate and to the liquid crystal display device.