A touchscreen is a term derived from the English words Touch and Screen, referring to a touch screen. That is, it is the display that the user touches to perform certain actions. It is worth noting that the touchscreen is present not only in phones but also in other equipment. For example, in the onboard screens of cars and smartwatches.
What is a touch screen? Modern phones are equipped with a touchscreen, which consists of a glass panel, which is covered with a layer of transparent resistive material. This is a standard capacitive touch screen. Special electrodes in the corners supply an alternating low-voltage voltage to the conductive layer. As you know, the body of any person can conduct current through itself and has a small capacitance. That is why the so-called “leakage” occurs when touching the display. And the location of this “leakage” is determined by the controller.
In devices produced in the early days of touch screens, resistive screens, where in addition to the glass plate is a special membrane. When you press, the membrane is deflected and in contact with the panel. The built-in controller records the change in resistance and then converts it into touch coordinates. An interesting feature is that capacitive touch screens do not respond to pressing objects, while resistive displays respond to no touch.
