ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,474,805, issued on Nov. 18, was assigned to PIXART IMAGING INC. (Hsin-Chu, Taiwan).
"Sensing touchpad" was invented by Chi-Chieh Liao (Hsin-Chu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sensing touchpad includes a substrate, a plurality of first driving electrodes, a plurality of sensing electrodes, at least one second driving electrode and at least one ground element. The substrate has a first surface and a second surface opposite to each other. The plurality of first driving electrodes are arranged in a first layer on the top surface of the substrate. The plurality of sensing electrodes are arranged in a second layer on the first layer....