Nowadays, many electronic products are used by touch, and most of them are used by fingers. Our touch screen is one of them. Then, what can be used instead of fingers for touch screens?
You can wrap the tip of the pen with the tin foil in the cigarette, leaving one end of the tin foil close to the pen body, then pinch the pen body and the tin foil with your hand, and touch the capacitive screen with the pen tip.
The capacitive touch screen technology uses the current induction of the human body to work. The capacitive touch screen is a four-layer composite glass screen. The inner surface and the interlayer of the glass screen are each coated with a layer of ITO. The outermost layer is a thin layer of silica glass protective layer. The interlayer ITO coating is used as the working surface, and the four corners are led out Four electrodes, the inner layer of ITO is a shielding layer to ensure a good working environment.
When a finger touches the metal layer, due to the electric field of the human body, a coupling capacitor is formed between the user and the surface of the touch screen. For high-frequency current, the capacitor is a direct conductor, so the finger draws a small current from the contact point. This current flows from the electrodes on the four corners of the touch screen, and the current flowing through the four electrodes is proportional to the distance from the finger to the four corners. The controller calculates the position of the touch point by accurately calculating the ratio of these four currents. .
If you still want to know more about the touch screen, what else can be used instead of your fingers, I hope it will be helpful to you. If you want to know more about the touch screen, you can click on the website page to browse!
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