Do You Know The Tricks During The Use Of The Touch Screen?
Apr 26, 2021
The touch screen industry is constantly developing, and the market has a wide range of expansion, especially in electronics, or electrical appliances, or smart products. The scope is wider. The arrival of the 5G era makes these touch screens feel better in daily use. I have seen a lot, and promoted synchronously. The advantages are obvious, and it is worth more industry choices!
The working principle of the resistive touch screen is mainly through the principle of pressure sensing to realize the operation and control of the screen content. The screen body of this touch screen is a multi-layer composite film that matches the surface of the display. The first layer is glass or plexiglass. The bottom layer, the second layer is the barrier layer, and the third layer is the surface layer of multi-element resin. The surface is also coated with a transparent conductive layer, and the surface is covered with a hardened, smooth and scratch-resistant plastic layer. The conductive layer and the glass layer sensor on the surface of the multi-element resin are separated by many tiny interlayers; when the current passes through the surface layer and touches the surface layer lightly, it touches the bottom layer, and the controller reads out the corresponding current from the four corners at the same time And calculate the distance of the finger position.
This touch screen uses two highly transparent conductive layers to form a touch screen, and the distance between the two layers is only 2.5 microns. When a finger touches the screen, the two conductive layers that are usually insulated from each other make a contact at the touch point. Because one conductive layer is connected to a 5V uniform voltage field in the Y-axis direction, the voltage of the detection layer changes from zero to zero. Non-zero, after the controller detects this is turned on, it performs A/D conversion and compares the voltage value obtained with 5V to obtain the Y-axis coordinate of the touch point. Similarly, the X-axis coordinate can be obtained. It is the most basic principle common to all resistive technology touch screens.
