Patent ID: 9599815
Date: 2017-03-21
CPC Classifications: B60K,G02B

Claim:
1. A head-up display apparatus that projects a display image, which is formed on a display surface, onto a projection surface of a movable body to display a virtual image viewable from an inside of a cabin of the movable body, the head-up display apparatus comprising: a display that includes a plurality of pixels arranged along the display surface and controls the pixels to form the display image on the display surface; a light source that radiates light; and a diffusion plate that diffuses the light coming from the light source and emits the diffused light toward the display; wherein: the diffusion plate is made of a transparent material and has a plurality of through-holes that penetrate the diffusion plate in a thickness direction of the diffusion plate; and in a specific direction on the display surface, a dimension of the through-hole is smaller than a pixel pitch of the pixels further comprising: a magnifier optical system that magnifiers the display image formed on the display surface and projects the magnified display image onto the projection surface, wherein: the dimension multiplied by a magnification ratio of the display image in the specific direction is less than or equal to 0.5 millimeters, the magnification ratio being provided by the magnifier optical system and the projection surface.