| abstract |
Provided are a head-up display system whereby double images can be reduced and an image can be displayed with high reflectance and high transmittance, and a windshield glass whereby a projection image display portion is not noticeable from the outside under external light when the windshield glass is used in the head-up display system. The head-up display system according to the present invention includes a windshield glass including a projection image display portion, a circularly-polarized-light reflecting layer and a λ/2 phase difference layer being included in the projection image display portion, the circularly-polarized-light reflecting layer including 4 or more cholesteric liquid crystal layers, and one of the four or more cholesteric liquid crystal layers having a center wavelength of selective reflection of 350 nm to less than 490 nm, and the head-up display system includes the windshield glass and a projector. |