Patent ID: 8736964

Claim:
A head-up display apparatus to achieve a visual recognition of a display image as a virtual display image from a viewpoint region by projecting the display image onto a projection face of a display member, the apparatus comprising: a screen member including an image formation face that forms a display image; and an optical device arranged separate from the screen member, the optical device including a reflection face, which receives and reflects the display image formed by the image formation face, to project the display image onto the projection face of the display member, the screen member and the optical device being arranged in a predetermined three dimensional space having an x axis, a y axis, and a z axis, which mutually intersect orthogonally, wherein: the image formation face includes a plurality of convex portions and a plurality of concave portions along the x axis and the y axis, each of the convex portions and the concave portions having a predetermined first length along the x axis and a predetermined second length along the y axis, the convex portions and the concave portions being disposed in a grid array where one convex portion is disposed to alternate with one concave portion along each of the x axis and the y axis, a virtual reference face of the image formation face being defined such that the convex portion has a convex face that is convex from the virtual reference face and the concave portion has a concave face that is concave from the virtual reference face; and the screen member and the optical device are arranged such that a perpendicular line that is perpendicular to any position of the virtual reference face passes through an outside of the reflection face of the optical device.