US Patent 9599825 Visual indicator for transparent display alignment

A head mounted device includes a sensor, a transparent display, and a processor comprising an augmented reality application and an alignment module. The augmented reality application generates a virtual content based on data from the sensor, and displays the virtual content in the transparent display. The alignment module detects an initialization of the augmented reality application and causes a temporary display of an alignment indicator in the transparent display in response to detecting the initialization of the augmented reality application.