Abstract: Embodiments provide a retention apparatus for a head-mounted device and a head-mounted apparatus including the retention apparatus and the head-mounted device. The retention apparatus includes left and right band portions arranged on respective sides of a user's head, which connect to the head-mounted device at one end, and include opposing free ends that are arrangeable toward a back side of the wearer's head. The retention apparatus includes left and right elastic straps and an adjustment mechanism. The adjustment mechanism is arrangeable at the back of the user's head and includes arms the telescope into and out of the adjustment mechanism. The elastic straps are attached to the left and right band portions at first ends and to respective arms of the adjustment mechanism at second ends. Adjustably moving the arms of the adjustment mechanism stretches or relaxes the elastic straps, adjusting tension of the retention apparatus.

Abstract: According to one implementation, an image display system includes a computing platform having a central processing unit (CPU), a system memory storing a software code, a display screen, and a motor controlled by the CPU and coupled to a rotor for rotating the display screen. The CPU is configured to execute the software code to spin the display screen about an axis at a predetermined spin rate using the motor and the rotor, and to render each of multiple perspectives of an image on the display screen at a frame rate during each revolution of the display screen about the axis. The predetermined spin rate is determined based on the number of perspectives of the image rendered per revolution of the display screen and the frame rate.

Abstract: Embodiments provide a retention apparatus for a head-mounted device and a head-mounted apparatus including the retention apparatus and the head-mounted device. The retention apparatus includes left and right band portions arranged on respective sides of a user's head, which connect to the head-mounted device at one end, and include opposing free ends that are arrangeable toward a back side of the wearer's head. The retention apparatus includes left and right elastic straps and an adjustment mechanism. The adjustment mechanism is arrangeable at the back of the user's head and includes arms the telescope into and out of the adjustment mechanism. The elastic straps are attached to the left and right band portions at first ends and to respective arms of the adjustment mechanism at second ends. Adjustably moving the arms of the adjustment mechanism stretches or relaxes the elastic straps, adjusting tension of the retention apparatus.