Analysis and Solutions for Common Faults of Capacitive Touch Screens

1.Resolve EMI interference: Specifically, enhance anti-interference design by adding a surrounding grounding wire around the Touch Screen to shield external interference signals, and design circuits in accordance with the IC design standards.

Please refer to the design drawings below.

2.Optimize the FPC: Apply full-area copper paving to the ground wire of the FPC to increase the grounding area, which can reduce the probability of component damage caused by static electricity and minimize static interference. The wiring design of the FPC shall also comply with the IC design standards.

Please refer to the design drawings below.

3.Optimize filtering through software: Debug the software program to shield interference signal bands and prevent accidental touches caused by interference waves.

Please refer to the oscilloscope waveforms obtained from the tests below.