ALEXANDRIA, Va., June 17 -- United States Patent no. 12,314,517, issued on May 27, was assigned to Uniphy Ltd. (Leeds, Great Britain).
"Optical touch screen" was invented by David Lomas (Swindon, Great Britain), Michael David Bean (Windsor, Great Britain), Iain Macalister (Beverston, Great Britain) and Jim Edward Nicholas (Clifton Village, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A touch sensitive apparatus comprises: a top plate comprising a plurality of touch detection regions, and having one or more light sources associated therewith, such that light from the one or more light sources is transmitted within the top plate with total internal reflection; a plurality of detectors for detec...