Head-up display device

A head-up display device mounted in a mobile object, the head-up display device configured to project a display light toward a projection member of the mobile object and to cause the display light to reach a visible area in the mobile object while causing the projection member to reflect the display light to display a virtual image visible from an inside of the visible region, the head-up display device comprising:

• a light source unit configured to emit an illumination light;
• a light condensing unit configured to cause condensation to collimate the illumination light;
• a liquid crystal element including a plurality of liquid crystal pixels aligned in an opening portion and configured to form an image with the illumination light, which is emitted from the light condensing unit to illuminate the opening portion, and to emit the display light of the image in a light flux shape in an emission direction corresponding to an incident direction of the illumination light;
• and
• an enlarging light guide unit including a positive optical element having a positive refractive power and a negative optical element having a negative refractive power, wherein
• the optical elements are located on an optical path to guide the display light from the liquid crystal element toward the projection member while enlarging the virtual image, and
• the negative optical element on the optical path is located closer to the liquid crystal element than the positive optical element to locate an entrance pupil farther from the liquid crystal element toward the light source unit.