OPTICAL FILM

To provide an optical film that can make the emission intensity of a visible light region uniform when incorporated into an image display device in combination with an LED light source, and can make hue of a display screen uniform, but can prevent brightness from deteriorating.SOLUTION: An optical f...

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Bibliographische Detailangaben
1. Verfasser:	KAWANAMI KEITA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	To provide an optical film that can make the emission intensity of a visible light region uniform when incorporated into an image display device in combination with an LED light source, and can make hue of a display screen uniform, but can prevent brightness from deteriorating.SOLUTION: An optical film is a polyester film containing a dye and/or a pigment, having a film haze of 6% or less, a transmittance of 450 nm light of 4% or less, and a transmittance of 550 nm light of 20% or more, and a color tone (b) value of 50 or more.SELECTED DRAWING: None 【課題】ＬＥＤ光源と組み合わせて画像表示装置に組み込んだ際、可視光領域の発光強度を均一化することができ、表示画面の色彩の均一化することができ、それでいて輝度が低下するのを防ぐことができる光学フィルムを提供する。【解決手段】染料および／または顔料を含有するポリエステルフィルムであり、フィルムヘーズが６％以下であり、４５０ｎｍの光線透過率が４％以下であり、５５０ｎｍの光線透過率が２０％以上であり、色調（ｂ*）値が５０以上であることを特徴する光学フィルムである。【選択図】なし