US Patent 10130875 Handheld controller with finger grip detection

A handheld controller including a main body having a thumb surface and a thumbstick extending from the thumb surface. A trigger button is positioned on the main body and a handle extends from the main body on a side opposite the trigger button, wherein the handle has a palm side and a finger side. A third-finger button is positioned on the finger side of the handle and includes a magnet mounted thereon. A sensor operative to detect the magnet is positioned inside the handle adjacent the magnet.