Abstract: A pen for capacitive touch input includes a replaceable head and a conductive handle. The conductive handle is a tube having a tunnel or a rod having a stocking hole for receiving the replaceable head and exposing the conductive tip of the replaceable head to touch a capacitive touch control device. The pen is adaptive to different capacitive touch control devices for precision and sensitivity on position detection by using different replaceable heads.

Abstract: A capacitive touchpad has insulating blocks provided above and below a resilient layer. The insulating blocks above the resilient layer are offset in position with respect to the insulating blocks below the resilient layer. Due to the insulating blocks, a plurality of gaps are formed in the capacitive touchpad. The gaps are filled with a fluid medium. When a conductive or non-conductive object touches the capacitive touchpad, the resilient layer is deformed at the touched position and thereby displaces the fluid medium completely from the affected gaps. As a result, the distance and the dielectric coefficient between the resilient layer or an electrode plate and a sensor layer are changed, causing variation in capacitance.

Abstract: A three-dimensional touch sensor is constructed from a two-dimensional capacitive touch sensor in association with a conductive layer and an elastic insulator or with an insulation layer and an elastic conductor. When the three-dimensional touch sensor is touched, the two-dimensional capacitive touch sensor positions the touch point in a sensing plane, and the elastic insulator or the elastic conductor deforms responsive to the pressure and thus generates a capacitance variation, from which a sensing value in the perpendicular direction is derived related to the magnitude of the pressure.