| 摘要 |
<p>The present invention provides a head-up display device which can improve light irradiation efficiency toward an eye box, suppress the amount of brightness change for a display image affected by the movement of the viewpoint, and achieve desirable properties for the light distribution angle. An illumination optical system (111) of the head-up display device has a light source (111a) for emitting a light beam (L0), a lens array (111c) for generating a plurality of images of the light source (111a) by dividing the light beam (L0), and a field lens (111d) for irradiating on a display member (113) at a given angle the light beam (L0) emitted from the image of the light source (111a), which is generated by the lens array (111c), wherein the lens array (111c) is arranged such that the imaging surface of the light source (111a) generated by the lens array (111c) is located on the side of the principal point of the field lens (111d) with respect to a focal point on the side of an object of the field lens (111d).</p> |
