Backlight system and optical sheet with pressure-sensitive adhesive

The present invention relates to a backlight system including an adherend for outgoing light, wherein the adherend is a light source (32), a light guide member (30), or a light source unit (3), an optical film (10, 12) subjected to embossing or roughening processing treatment so as to increase the s...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HOTTA, YUJI, TOMINAGA, TAKASHI, MOROISHI, YUTAKA
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING 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 FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	The present invention relates to a backlight system including an adherend for outgoing light, wherein the adherend is a light source (32), a light guide member (30), or a light source unit (3), an optical film (10, 12) subjected to embossing or roughening processing treatment so as to increase the surface area thereof, and a pressure-sensitive adhesive layer (20) containing a pressure-sensitive adhesive polymer having a gel fraction of 35 to 85%, in which the adherend and the optical film are joined through the pressure-sensitive adhesive layer. The adherend has a refractive index which is smaller than a refractive index of the pressure-sensitive adhesive layer (20), and the pressure-sensitive adhesive layer (20) has the refractive index which is smaller than a refractive index of the optical film (10, 12). Further, the invention relates to a process for producing the backlight system, an optical sheet with a pressure-sensitive adhesive which is used in the backlight system, and an image display and an illuminating system using the backlight system.