Touch panel production

Capacitive screen in principle, the human body as a capacitor element of an electrode, when there is a conductor close to the working surface of the laminated ITO coupled with a sufficient amount of capacitance between the capacitance, the current flow away is enough to cause the capacitive screen misoperation. We know that the capacitance value, although inversely proportional to the distance between the poles, is proportional to the relative area, and is also related to the insulation coefficient of the dielectric. Therefore, when a larger area of the palm of the hand or handheld conductor near the capacitive screen rather than touch can cause capacitive screen malfunction.
Capacitive technology touch screen is a four-layer composite glass screen, the inner surface of the glass screen and the interlayer is coated with a layer of ITO, the outermost layer is only 0.0015 mm thick protective layer of silica glass, interlayer ITO coating as a working surface, four corners lead to four electrodes, the inner layer of ITO for the shielding layer to ensure a good working environment. When the user touches the capacitive screen, due to the human body electric field, the user’s fingertips and the work surface to form a coupling capacitance, because the work surface is connected to the high-frequency signal, so the fingertips absorb a very small current away. This current is divided from the electrodes on the four corners of the touch screen, and theoretically flow through the four electrodes of the current and the finger to the four corners of the distance proportional to the controller through the four current proportional to the precise calculation, the location of the touch point.