Capacitive touch screen quotation structure

- Aug 23, 2018-

The basic structure of capacitive touch screen is as follows: the base plate is a single layer of plexiglass, a transparent conductive film is deposited evenly on the inner and outer surface of the plexiglass, and a long and narrow electrode is inserted on the four corners of the transparent conductive film on the outer surface.Its working principle is: when the finger touch capacitive touch screen, in working face through high frequency signal, at this point a finger and touch screen face form a coupling capacitance, the equivalent of a conductor, because work surface has high frequency signal, the fingers in touch points suck a little current, the small current respectively from touch screen on the four corners of the electrode, through the four electrodes with the finger to the four corners of the current is proportional to the linear distance, the controller through the calculation of the four current ratio, can be concluded that the contact point coordinate values.