Generally, capacitive touch panel products are coated with a layer of antimony tin oxide film (ato layer) and protective film (hard coat layer) on the surface of transparent glass, while the LCD monitor (LCD monitor) needs to be treated with electronic signal interference prevention (shielded layer).

The capacitive touch panel manufacturer tells you that when a person is not in contact with the touch panel, the various electrodes are at the same potential, and there is no electric current passing through the touch panel. When it comes into contact with the touch panel, the static electricity in the human body flows into the ground and generates a weak current to pass through. The detection electrode changes according to the current value, and the contact position can be calculated. The capacitive touch panel manufacturer tells you that the antimony tin oxide film (ato) layer on the glass surface has a resistivity. In order to obtain the same electric field, electrodes are installed around it, and the current is input from four sides or four corners.　
The capacitive touch panel manufacturer tells you that when inputting from 4 sides, the electric field is obtained by the resistance distribution method around the 4 corners is less than the impedance on the 4 sides. For practical applications, there is a type of mounting a set of resistive substrates on a transparent conductive film (ato layer); there are also types of etching the transparent conductive film (ato layer). When inputting from 4 angles, the equal electric field is generally obtained by combining the frontal edge resistance of printing and the transparent conductive film (ato layer). The capacitive touch panel manufacturer tells you that when inputting from the 4 sides, it can be calculated according to the current ratio of the top and bottom and the left and right, and the detection method is relatively simple. When inputting from 4 corners, the detection method has to get the distance ratio to the 4 sides, and the position calculation is also more complicated.