Capacitive Technology Touch Screen

- Nov 28, 2016-

Work is the use of the body's current sensing. Capacitive touch screen is a four-layer composite glass, and laminated on the inner surface of the glass screen is coated with a layer of ITO, the outermost protective layer is a thin layer of silica glass, sandwich ITO coatings as a face, led to four electrodes on the four corners, ITO the inner shielding to ensure a good working environment. When the fingers on the metal floor while, body electric, the user and the touch-screen surface with a coupling capacitor, high frequency current, capacitance is a direct conductor and finger suck a small amount of current from the contact point. The current flows from don't touch the electrode on the four corners of the screen, and flows through this four-electrode current is proportional to the distance to the four corners and finger, the controller through the accurate calculation of the four current, come to the location of the touch point.

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