The working principle of the resistance touch screen mainly realizes the operation and control of the screen content through the pressure sensing principle, Wherein the first layer is a glass or an organic glass bottom layer, the second layer is a barrier layer, the third layer is a multi-element resin surface layer, the surface is further coated with a transparent conductive layer, and the upper surface of the second layer is covered with a plastic layer with an outer surface through hardening treatment and smooth and scratch-resistant. The conductive layer and the glass layer inductor on the surface of the multi-component fat surface layer are separated by a plurality of small interlayer,
the current passes through the surface layer, and when the surface layer is depressed, the controller contacts the bottom layer, and the controller reads the corresponding current from the four corners and calculates the distance of the finger position. The touch screen uses two layers of highly transparent conductive layer to form the touch screen, and the distance between the two layers is only 2.5 microns. when the finger touches the screen, the normally mutually insulated two-layer conductive layer is in contact with the position of the touch point, the voltage of the detection layer is changed from zero to non-zero due to the 5 v uniform voltage field in the y-axis direction of one side of the conductive layer, And comparing the obtained voltage value with 5v, the y-axis coordinate of the touch point can be obtained, and the coordinate of the x-axis is obtained in the same way, which is the common basic principle of all the resistance technical touch screens.