| 摘要 |
PROBLEM TO BE SOLVED: To provide a head-up display (HUD) device suppressing luminance unevenness.SOLUTION: An HUD device 100 includes: a laser scanner 10 projecting laser light that forms a display image 71; and a screen member 30 including a plurality of optical elements 32 arrayed in a lattice form so as to diffuse laser light incident from the laser scanner 10 to the optical elements 32 and to guide the light toward a projection surface 91 side. Each optical element 32 has, on a surface thereof, a curved surface 33 in a convex curved form as a common curved form among the optical elements 32, and diffuses laser light to exit via the curved surface 33 to the projection surface 91 side. Regarding adjacent ones of the optical elements 32, sag amounts S from surface vertices 34 of the curved surfaces 33 thereof to a boundary 35 therebetween are different from one another. |
