US Patent 10540023 User interface devices for virtual reality system

A virtual reality user interface device having a pad and a stylus pen is provided. The pad includes a transparent touch part, a pad tracking part, a touch part frame, and a plurality of light sources disposed on an outside surface of the pad tracking part. The touch part frame is coupled with an outer border area of the transparent touch part and coupled to a portion of the pad tracking part. The pad tracking part includes extension portions extending in a longitudinal direction of the transparent touch part at the periphery of both sides of the transparent touch part from the pad tracking part. The stylus pen includes a stylus grip, a stylus tip detachably mounted to the stylus grip, a stylus tracking part coupled to the stylus grip, and a plurality of light sources disposed on an outside surface of the stylus tracking part.