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Capacitive Touch Screen
- Jul 03, 2018 -
10 Inch Touch Screen

The basic structure of the capacitive touch screen is: Organic glass substrate for a single, uniform forging respectively on internal and external surfaces of the organic glass on a layer of transparent conductive film, respectively in the outside surface of transparent conductive film on the four corners of a narrow electrodes on cone. Its working principle is: When the finger touch capacitive touch screen, in working face through high frequency signal, at this point a finger and touch screen face form a coupling capacitance, the equivalent of a conductor, because work surface has high frequency signal, the fingers in touch points suck a little current, the small current respectively from touch screen on the four corners of the electrode, through the four electrodes with the finger to the four corners of the current is proportional to the linear distance, the controller through the calculation of the four current ratio, can be concluded that the contact point coordinate values.

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