HEAD-UP DISPLAY SYSTEM

A head-up display system that displays a virtual image superimposed on a real view that can be visually recognized through a window part. The head-up display system includes a display part, an optical system, a light source part, an operation part for adjusting a position of the virtual image in a vertical direction, and a controller. The display part emits a light flux to be visually recognized by an observer as the virtual image. The optical system guides the light flux to the window part. The light source part emits light. The controller controls a display area of the display part in accordance with an operation of the operation part by the observer. The light flux emitted from the display part is reflected by the window part and reaches a visually recognizable area where the observer can visually recognize the virtual image. The light emitted from the light source part is reflected inside an area where the light flux is reflected by the window part and reaches the visually recognizable area. The virtual image and the light from the light source part are superimposed, and can be visually recognized.