An example of a display system includes a sensor, a projector, and control means. The sensor senses user information for calculating a state regarding sleep of a user. The user information is, for example, biological information such as pulse. The projector projects and displays a predetermined image. The projector, for example, projects the image upward to project and display the image on the ceiling. The control means controls the projector in accordance with a state regarding sleep, which is calculated on the basis of the user information.
