ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,395,172, issued on Aug. 19, was assigned to DARFON ELECTRONICS CORP. (Taoyuan, Taiwan).
"Touch input device" was invented by Chao-Yu Chen (Taoyuan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A touch input device includes a circuit board, a plurality of illuminant elements disposed on the circuit board, a spacer disposed over the circuit board, a plurality of light guide plates, a shielding sheet, and a top plate. The circuit board has a board edge and an upper surface having a plurality of sensing regions. The spacer has a light-leaking edge and a plurality of accommodation holes for accommodating the illuminant elements and the light guide p...