Patent ID: 11947109

Abstract:
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), 0.3≤x1≤2.0 and  (i)y1≥1.86x1+0.13.  (ii)When the second polarization converting layer has a number of pitches x2 and a film thickness y2 (unit: μm), 0.25≤x2≤2.0,  (iii)y2≤1.37x2+5.5, and  (iv)y2≥1.37x2+0.25.  (v)