Abstract: A disclosed hinge assembly for a head-mounted display device comprises a four-bar linkage. A first linkage of the four-bar linkage is mountable to or forms part of a wearable article for a head of a user. A second linkage and a third linkage of the four-bar linkage each rotatably couple the first linkage to a fourth linkage of the four-bar linkage. The fourth linkage of the four-bar linkage is mountable to or forms part of a display device. A disclosed head-mounted display device comprises a display device; a rearward mount by which the head-mounted display device is mountable to a wearable article for a head of a user; and a hinge assembly rotatably coupling the display device to the rearward mount. The hinge assembly includes a four-bar linkage that provides a path of travel for the display device along a curved path from a deployed state to a stowed state.