Patent ID: 8599140

Claim:
A method for providing a touch interface for including a display, the method comprising: providing an electromagnetic signal to the display from a first side of the display to a second side of the display, wherein the display is transparent and the first and second sides are beveled within the display; determining whether the electromagnetic signal is detected at the second side of the display, the display providing the electromagnetic signal a path between the first side and the second side through the display in the absence of a detectable touch such that the electromagnetic signal is detected at the second side of the display in the absence of the detectable touch, the path including at least one total internal reflection in the display, and where the detectable touch when at one of the at least one total internal reflection is detectable as a portion of the electromagnetic signal transmitted along the path is not detected on the second side; and blocking a zero mode path between the emitter and the detector for the electromagnetic signal, wherein the zero mode path is characterized by a path without internal reflection.