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vasiatka2021-08-09 20:42:23
Sensors
vasiatka, 2021-08-09 20:42:23

How is tapping on a capacitive screen polled and at what frequencies?

I am solving a theoretical problem. The time of taps on the screen is processed.
Maximum precision required.

The problem is that the theoretical model of the problem does not agree with the real experiment, it is necessary to understand why and where the excessive noise comes from.
We need any technical information about how the screen sensors are polled, in what order, with what frequencies, how the screen controller (if any) sends information about clicks.

As I understand it, pressing is tied to a certain frequency, i.e. the time intervals between pressings are multiples of some number.
Does the location of the tap on the screen affect the offset of these time intervals? Those. Does the controller send data to the processor/system at precise time intervals after polling all sensors, or immediately upon detecting a press on a specific sensor?

If there is good literature on this subject, I will be very grateful. It is possible in the bourgeois language, it is possible in Russian.

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