LUMINANCE-ENHANCED FILM

Disclosed is a luminance-enhanced film, including birefringent island-in-the-sea yarns, whose island portions are grouped, based on two or more spinning cores, present in a sheet. The luminance-enhanced film causes formation of an optical modulation interface between island portions and sea portions...

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Bibliographische Detailangaben
Hauptverfasser:	YANG, IN YOUNG, KIM, YEON SOO, JO, DEOG JAE, KIM, DO HYUN, KIM, JIN SOO
Format:	Patent
Sprache:	eng ; fre ; ger
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 MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SPINNING TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TEXTILES
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Beschreibung
Zusammenfassung:	Disclosed is a luminance-enhanced film, including birefringent island-in-the-sea yarns, whose island portions are grouped, based on two or more spinning cores, present in a sheet. The luminance-enhanced film causes formation of an optical modulation interface between island portions and sea portions, thus maximizing optical modulation efficiency, as compared to conventional birefringent island-in-the-sea yarns. The birefringent island-in-the-sea yarns of the present invention are free of aggregation of island portions in the center thereof, although the number of island portions is 500 or more. As a result, the birefringent island-in-the-sea yarns maximize an optical modulation interface area, and thus considerably improve optical modulation efficiency, as compared to conventional birefringent island-in-the-sea yarns including one spinning core. Accordingly, the birefringent island-in-the-sea yarns advantageously exhibit considerably improved luminance, as compared to conventional birefringent island-in-the-sea yarns wherein birefringent fibers or one spinning core is present in a sheet.