The product uses a ten-point capacitive touch screen.
Capacitive touch screens are very sensitive to power noise. Ripple voltage/current from the power adapter can cause the LCD ripples, as well as the malfunction of the capacitive touch. If you use the APK Multi-Touch under Android to test it, you can find the touchpoint float. You can solve this problem by using
- a high quality power adapter.
- a battery to provide the power, like a cell phone or tablet PC
If the user power adapter isn’t good enough, make sure Pin 3 is connected to the Ground. This can eliminate the problem totally. You can test it by touching the Ground of the CS19108R125P-C111 with one hand, and the capacitive touch screen with the other hand.