Head-up display device

A head-up display device for a vehicle that superimposes and displays a virtual image on a foreground of an occupant of the vehicle, the head-up display device comprising:

• a projector that emits light of a display image to be displayed as the virtual image;
• an adjustment mechanism that mechanically displaces a projection range of a projection member mounted on the vehicle, to which the light emitted from the projector is projected;
• a state controller that controls a state of the display image to be projected by the projector to maintain a display position of the virtual image according to a displacement of the projection range by the adjustment mechanism;
• and
• an information acquisition unit that acquires position information of an eye point of the occupant, wherein:
• the adjustment mechanism displaces the projection range to a corresponding projection position corresponding to the eye point in accordance with a movement of the eye point;
• the state controller temporarily changes the state of the display image to display the virtual image at a corresponding display position corresponding to the eye point in accordance with the movement of the eye point;
• and
• the state controller returns the state of the display image toward a previous state of the display image before changing to maintain displaying the virtual image at the corresponding display position in accordance with the displacement of the projection range to the corresponding projection position by the adjustment mechanism.