
A) INDIUM TIN OXIDECapacitive sensors found in most existing touchscreens, track pads, OLED displays, and other electronics use indium tin oxide (ITO) as an electrode. The conductive material transmits an electric current to a user’s fingertips. ITO is also transparent, so light from the underlying LCD screen shines through.
B) SENSOR BOARDThe sensor board injects tiny electric currents into the ITO layer. When a user touches the screen (and thus...