US Patent 9630098 Head mounted display

A head mounted display is provided. The head mounted display includes a head attachment portion and a viewing module coupled to the head attachment portion. The viewing module includes an inner portion having a view port into a screen configuring for rendering image content, and an exterior housing. Further included are a plurality illuminating elements integrated with the exterior housing of the viewing module. The plurality of illumination elements defined for image tracking of the head mounted display. Illumination logic is provided for controlling the plurality of illumination elements to be active or inactive during use of the head mounted display.