The product CS19108R125P-C111 uses a ten-point capacitive touch.
Capacitive touch screens are very sensitive to power noise. Ripple voltage/current from the power adapter will cause the LCD ripples, and will also cause the capacitive touch malfunction: If you use the APK Multi-Touch under Android to test, you can find the touch point float. There are several ways to solve this problem:
- Use a high quality power adapter.
- Use a battery to provide the power, like a cell phone or tablet PC.
If the user power adapter isn’t be good enough, there’s another effective method to solve this problem: Make sure the CS19108R125P-C111 power input connector Pin 3 really connect to user “Power System Ground”. This method can eliminate the problem totally. Users can also use another method to test this problem: touch the GND of CS19108R125P-C111 by one hand, the other hand operates on the capacitive touch screen. In this case, the user’s body acts as the Power System Ground.