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http://www.amongo.com.cn/android-based-all-in-one-pcs/

1. Development background of capacitive touch screen

With the rising market position of tablet computers, the capacitive touch screen industry has been led to become an uprising industry. But as more and more companies enter the market, competition in the entire industry has become increasingly fierce, profit margins have been continuously compressed, and touch screen stock markets have become more volatile.

2. The development direction of capacitive touch screen

The capacitive touch screen allows the user to lightly touch the icon or text on the LCD display to realize the host operation, which eliminates the operation of the keyboard and mouse and makes the human-computer interaction more intuitive. It is mainly used for public hall information queries, leadership office, electronic games, song order, multimedia teaching, air ticket/train ticket pre-sale, etc.
The capacitive touch screen uses a transparent metal layer coated on a glass plate as a conductor, and narrow electrodes are arranged on both sides of the LCD touch screen, and a low-voltage AC electric field is formed in the conductive body. When the finger touches the metal layer, when the conductive object touches, the capacitance of the contact will change, the current from the four electrodes will flow to the contact, and the controller can determine the position information of the contact through the current. Since the capacitance changes with temperature, humidity, or grounding, it has poor stability and is prone to drift.

Industrial control capacitive touch screens usually use resistive screens, but now the development of touch products is powerful, sensitive capacitive screens completely replace resistive screens, capacitive touch screens will be widely used in the industrial field.

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