A projection screen apparatus has: a display panel having an external panel surface and an internal panel surface; an actuator device by way of which an oscillating motion is impartable to at least a part of the projection screen apparatus; a diffuser screen, disposed adjacently to the internal panel surface, to which the oscillating motion with respect to the display panel is imparted by way of the actuator device; and a gap between the internal panel surface of the display panel and an inner surface of the diffuser screen directed toward the internal panel surface being filled at least in part with at least one viscoelastic filler material.