Capacitive pen is the use of conductive material having conductive properties for capacitive touch screen complete with interactive pen operation.

Capacitive pen using current sensing body work. Capacitive touch screen is a four-story complex glass screen, the inner surface of the glass panel and sandwich coated with a layer ITO (both coated conductive glass), the outermost layer is a thin layer of silica glass protective layer, ITO coating as a job surface, leads to the four corners of the electrodes, the inner layer of ITO as a shield in order to ensure a good working environment. When the fingers touch the metal layer, the electric field due to the human user and the touch screen surface of a coupling capacitor for high-frequency current, capacitance is directly conductor, so your fingers away from the contact point of a small current. This current flows from the electrode, respectively, on the four corners of the touch screen, and a current flows through four electrodes from the four corners of the finger to the proportional controller through the accurate calculation of the four current ratio, come touch points location information.

Capacitive pen usefulness

Generally used for touch phones or game consoles.