Patent ID: 7352940
Filing Date: 2008-04-01
Classification: G02B,G06F

Abstract:
1. An input device for an electronic device comprising: at least one light source; at least one multi-element light detector to detect light intensity at a plurality of light detecting elements; an input area defining a plane; and a waveguide structure including a first set of waveguides with associated first set of reflective elements, and a second set of waveguides, each composed of a material with first refractive index, wherein: said light source couples light into said first set of waveguides with associated first set of reflective elements; said first set of waveguides directs the light onto said associated first set of reflective elements; said associated first set of reflective elements collimates the light in the plane of the input area to produce a first grid of light beams; and said first grid of light beams traverses the input area in a first direction and is directed to the light detecting elements of said multi-element light detector by said second set of waveguides.