Abstract: A head-up display device includes: a plurality of light sources arrayed in matrix in a Y-direction and a Z-direction; and a lens unit in which a convex lens portion for collecting radiant light radiated from the light sources is formed opposing each light source. The plurality of light sources are arranged at an interval A in a Z-direction and at an interval B, which is smaller than the interval A, in the Y-direction. The lens unit has a first connection portion and second connection portions formed at boundaries of the adjacent convex lens portions. The first connection portion extends in the Y-direction, and the second connection portions extend in the Z-direction.

Abstract: A head-up display device includes: a plurality of light sources arrayed in matrix in a Y-direction and a Z-direction; and a lens unit in which a convex lens portion for collecting radiant light radiated from the light sources is formed opposing each light source. The plurality of light sources are arranged at an interval A in a Z-direction and at an interval B, which is smaller than the interval A, in the Y-direction. The lens unit has a first connection portion and second connection portions formed at boundaries of the adjacent convex lens portions. The first connection portion extends in the Y-direction, and the second connection portions extend in the Z-direction.

Abstract: A head-up display device projects display light from a display including a backlight unit and a liquid crystal display element on a viewpoint area of a viewer via projection means and causes an image by the display light to be visually recognized. The backlight unit includes: a light source emitting light for illuminating the liquid crystal display element; a lens array including a plurality of lenses, and dividing the light from the light source and generating a plurality of images of the light source; and light gathering means which gather the light from the images of the light source such that the light corresponds to a display area of the liquid crystal display element, wherein the lens array is configured such that the light distribution angles of the lenses at the periphery thereof are different from the light distribution angles of the lenses at the center thereof.

Abstract: 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 of the head-up display device has a light source for emitting a light beam, a lens array for generating a plurality of images of the light source by dividing the light beam, and a field lens for irradiating on a display member at a given angle the light beam emitted from the image of the light source, which is generated by the lens array, wherein the lens array is arranged such that the imaging surface of the light source generated by the lens array is located on the side of the principal point of the field lens with respect to a focal point on the side of an object of the field lens.

Abstract: 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 of the head-up display device has a light source for emitting a light beam, a lens array for generating a plurality of images of the light source by dividing the light beam, and a field lens for irradiating on a display member at a given angle the light beam emitted from the image of the light source, which is generated by the lens array, wherein the lens array is arranged such that the imaging surface of the light source generated by the lens array is located on the side of the principal point of the field lens with respect to a focal point on the side of an object of the field lens.