Four-wire resistive touch screen working principle demonstration experiment instrument and demonstration method thereof

The invention discloses a four-wire resistive touch screen working principle demonstration experiment instrument, which comprises a computer with a display screen, a four-wire resistive touch screen and a USB control card. After the four-wire resistive touch screen is connected with the computer via the USB control card, an arrow point on the computer display screen can be controlled. The four-wire resistive touch screen working principle demonstration experiment instrument also comprises a touch screen working principle simulation device. The device comprises two variable resistance devices fixed on the base. Two ends of the two variable resistance devices are correspondingly connected onto the USB control card interface via wires. After the other end of the USB control card is connected onto the computer, the arrow point on the computer display screen can also be controlled. The invention also discloses the experiment instrument demonstration method. The experiment instrument is used for carrying out learning on the working principle of the four-wire resistive touch screen, which is more intuitive and easier to understand for students, and the students can more clearly know the working principle of the four-wire resistive touch screen and the role of the ITO in the four-wire resistive touch screen played.