Capacitive pen is the use of conductive material having conductive properties for capacitive touch screen complete with interactive pen operation. Current sensing using human 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 smallnbsp;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. For some simple production capacitive pen, is not recommended, very simply, you are willing to dig thousands of dollars to a good cell phone, why give up a dozen or hundreds of dollars to come to buy specifically for touch screen use of capacitive pen it causes:

1 Do not firmly in touch using will cause scratching off the screen phenomenon. The main professional to do the pen are generally used machines do, the process will be relatively rough, especially conductive parts are not secure.

2 is not high precision, used for painting, generally need to use high-sensitivity capacitive pen, this capacitive pen in the market are more expensive side, mainly on the process as well as quality, are relatively more stringent requirements