What is the more the structure of capacitive touch

Multipoint method of capacitance screen, the structure of the capacitive touch screen is mainly on the glass screen coated with a layer of thin film transparent conductor layer, again in the conductor layer and a protective glass, double glass design can completely protect the conductor layer and the sensor. Capacitive touch screen on the touch screen edges are plated narrow electrodes, forming a low voltage ac electric field in conductive body. When touching the screen, the electric field due to the human body, fingers and can form a coupling capacitance between conductor layer, electrode current will flow to the contact from the four edges of bag, and current intensity is proportional to the finger to the electrode distance, the touch screen behind the controller can calculate the current ratio and strength, accurately calculate the position of the touch point. Capacitance screen cost price is higher, its principle is to use life, and to locate the contact when the current screen, so you can operate on your fingers, but the organism, like nails, pen from it. In addition, the accuracy of capacitive touch screen can achieve a few pixels in theory, in fact range in 1 square centimeters.
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