CIRCULAR POLARIZATION PLATE

To provide a circular polarization plate suitable for an on-vehicle display, which can reduce reflected light upon reflecting display light on a windshield in a vehicle and can reduce change in color of the reflected light.SOLUTION: A circular polarization plate has a first optically anisotropic lay...

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Bibliographische Detailangaben
1. Verfasser:	SUMIYOSHI SUZUKA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADVERTISING BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON CRYPTOGRAPHY 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 DISPLAY DISPLAYING EDUCATION ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FREQUENCY-CHANGING LABELS OR NAME-PLATES MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS SEALS SEMICONDUCTOR DEVICES SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:	To provide a circular polarization plate suitable for an on-vehicle display, which can reduce reflected light upon reflecting display light on a windshield in a vehicle and can reduce change in color of the reflected light.SOLUTION: A circular polarization plate has a first optically anisotropic layer, a polarizer, and a second optically anisotropic layer in this order from a viewing side. The first optically anisotropic layer has optical characteristics represented by Re(450)/Re(550)≤1.00, 1.00≤Re(650)/Re(550), 90 nm≤Re(550)≤180 nm. The first optically anisotropic layer and the second optically anisotropic layer are layers containing a polymer polymerized in a state in which a polymerizable liquid crystal compound is oriented.SELECTED DRAWING: None 【課題】車内においてディスプレイ光がフロントガラスで反射した際の反射光を低減するとともに反射光の色変化を低減する、車載用ディスプレイに適した円偏光板を提供すること。【解決手段】視認側から、第１の光学異方性層、偏光子、第２の光学異方性層をこの順に有する円偏光板であって、第１の光学異方性層がＲｅ（４５０）／Ｒｅ（５５０）≦１．００、１．００≦Ｒｅ（６５０）／Ｒｅ（５５０）、９０ｎｍ≦Ｒｅ（５５０）≦１８０ｎｍで表される光学特性を有し、第１の光学異方性層及び第２の光学異方性層が、重合性液晶化合物が配向した状態で重合した重合体を含む層である円偏光板。【選択図】なし