Patent ID: 9063617
Filing Date: 2015-06-23
Classification: G06F

Abstract:
1. An interactive display system comprising: a waveguide that comprises: an interface surface configured to be engaged by a user with an object; and an underlayer having a first index of refraction and being disposed between layers of the waveguide having indices of refraction that are less than the first index of refraction; and one or more photosensitive detectors in optical communication with the underlayer to receive electromagnetic radiation therefrom, the one or more photosensitive detectors generating one or more output signals, a given one of the one or more output signals being related to an amount of electromagnetic radiation received from the underlayer by the corresponding one of the one or more photosensitive detectors that generated the given output signal, wherein the waveguide and the one or more photosensitive detectors are configured such that electromagnetic radiation emanating from the object into the waveguide is guided by total internal reflection within the underlayer to the one or more photosensitive detectors such that information related to the position of the object with respect to the interface surface can be determined as a function of the one or more output signals.