

Head-up display technology has progressed rapidly in recent years. Compact, fixed-reference head-up display systems are now installed in automobiles. Virtual-reality (VR) and mixed-reality (MR) goggles for the consumer market are also available. Nevertheless, various impediments to user-friendly head-up display technology remain. One challenge relates to the increased size, weight, cost and power consumption of redundant optical componentry in a fixed-reference head-up display system or wearable display device. One embodiment provides a head-up display system. The display system comprises a microprojector, first and second viewer optics, a redirection optic, and an electronic controller.

Switchable electronically between first and second optical states, the redirection optic is configured to receive a display image from the microprojector, to convey the display image, in the first optical state, to the first viewer optic, and to convey the display image, in the second optical state, to the second viewer optic.
