It is an object of the present invention to provide a projection image-displaying member having excellent suitability for polarizing sunglasses, a windshield glass, and a head-up display system. The projection image-displaying member has a first polarization converting layer, at least one selectively reflecting layer, and a second polarization converting layer in this order. The first polarization converting layer and the second polarization converting layer are layers formed by fixing a helical alignment structure of a liquid crystal compound. The number of pitches in the helical alignment structure and a film thickness satisfy all relational expressions below.When the first polarization converting layer has a number of pitches x1 and a film thickness y1 (unit: µm),(i) 0.3 ≤ x1 ≤ 2.0 and(ii) y1 ≥ 1.86x1 + 0.13.When the second polarization converting layer has a number of pitches x2 and a film thickness y2 (unit: µm),(iii) 0.25 ≤ x2 ≤ 2.0(iv) y2 ≤ 1.37x2 + 5.5, and(v) y2 ≥ 1.37x2 + 0.25.
PROJECTION IMAGE DISPLAYING MEMBER, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM
PROJEKTIONSBILDANZEIGEELEMENT, WINDSCHUTZSCHEIBENGLAS UND HEAD-UP-ANZEIGESYSTEM
ÉLÉMENT D'AFFICHAGE D'IMAGE DE PROJECTION, VITRE DE PARE-BRISE ET SYSTÈME D'AFFICHAGE TÊTE HAUTE
2022-02-23
Patent
Elektronische Ressource
Englisch
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