HEAD-UP DISPLAY SYSTEM

A problem to be addressed by the present invention is to provide a head-up display (HUD) system that makes it less possible that coloring is visually recognized on a windshield even with sunglasses worn. The gist of the present invention resides in a head-up display system including: an image projector configured to project an image; and a resin film configured such that the image from the image projector is projected on the resin film; the head-up display system being characterized in that, in a light constituting the image from the image projector, the intensity of a p-polarized light component with respect to an incidence plane is 51% or more of the intensity of all the light components, assuming that the resin film is a reflective plane, and that the resin film is disposed in such a manner that the incidence plane where the maximum of the absolute value of a* and the maximum of the absolute value of b∗ determined by the measurement method described in the DESCRIPTION satisfy the following formulae (1) and (2) is at 90±10° to a horizontal plane. Maximumofabsolutevalueofa*≤30Maximumofabsolutevalueofb*≤30