CPC G06F 3/0428 (2013.01) [G06F 3/0421 (2013.01); G06F 2203/04107 (2013.01)] | 21 Claims |
1. A touch sensing apparatus, comprising:
a light transmissive panel that defines a touch surface, an opposite rear surface, and panel sides extending between the touch surface and rear surface, the panel sides defining a perimeter of the light transmissive panel;
a plurality of light emitters and detectors arranged along the perimeter and adjacent the panel sides; and
a light guide arranged along the perimeter and comprising a light guide element;
wherein the light emitters are arranged to emit a respective beam of light onto the light guide so as to generate propagating light that propagates above the touch surface,
wherein the light detectors are arranged to receive detection light generated as said propagating light impinges on the light guide,
wherein said propagating light is specularly reflected by the light guide, and
wherein the light guide element comprises a recess or protrusion for interlocking with a correspondingly mating locking surface of a frame element of the touch sensing apparatus.
|