Touch screen scanning data self-adaptive noise control method and touch screen scanning data self-adaptive noise control system

Abstract

The invention discloses a touch screen scanning data self-adaptive noise control method, which comprises the following steps: S1, completing one-frame scanning on a touch screen, and calculating according to scanning data to obtain original data; s2, performing difference calculation on the original data and pre-stored reference data to obtain difference data; s3, searching a peak value in the difference data and calculating a touch screen coordinate corresponding to the peak value; s4, reporting the touch screen coordinates corresponding to the peak values, and meanwhile, obtaining a peak value distribution diagram and performing feature analysis; s5, judging whether scanning parameters need to be adjusted or not according to feature analysis result; if yes, executing the step S6, and if not, returning to the step S1, and starting the scanning of the next frame; and S6, calculating a new scanning parameter, and starting the scanning of the next frame. According to the invention, scanning parameters can be dynamically modulated according to the noise intensity, and effective balance can be carried out between noise processing and a point reporting rate.

Description

technical field [0001] The invention relates to a touch screen scanning data processing system, in particular to a touch screen scanning data adaptive noise control method and system. Background technique [0002] Currently, touch screens have become an indispensable part of people's daily life, and commonly used touch screen terminals include smart phones, smart watches, and the like. Capacitive touch screens include self-capacitance screens and mutual-capacitance screens. Taking mutual capacitance as an example, it includes several transmitting ends and several receiving ends. The sending end sends a scanning waveform, which can be a square wave, a sine wave, etc. The receiving end detects the analog voltage signal, performs analog-to-digital conversion, and then performs digital signal processing. The amplitude of the voltage signal at the receiving end is affected by the mutual capacitance of the interaction point between the transmitting end and the receiving end, so...

AI Technical Summary

Problems solved by technology

Therefore, reducing noise and increasing the reporting rate are contradictory. Reducing noise interference will cause the reporting rate to decrease, and increasing the reporting rate will increase the noise interference.

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