Capacitive touch screen
Capacitive touch screen can be simply seen as a screen composed of four layers of composite screen: the outermost layer is a glass protective layer, followed by a conductive layer, the third layer is a non-conductive glass screen, and the fourth inner layer is also a conductive layer. The innermost conductive layer is the shielding layer that plays the role of shielding the internal electrical signal. The conductive layer in the middle is the key part of the whole touch screen. There are direct leads on the four corners or four edges
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