How to Solve the Anti-interference Problem of Capacitive Touch Screen?

In real life, our living standards have improved significantly, and there are many electronic products around us. As far as I know, the anti-interference problem of capacitive touch screen is a very headache for touch screen manufacturers now. The anti-interference of capacitive touch screen is one of the performance requirements of touch screen. If the anti-interference is weak, it will affect the touch screen effect of the switchboard, such as The touch is not sensitive, the problem is inaccurate, and it is very affected by the outside world.　

First of all, we must understand the structure of capacitive touch screen and the principle of capacitive touch screen, and then find the reason for the anti-interference of capacitive touch screen, what is the general impact: capacitive touch screen anti-interference problems are manifested as: screen jumping, inaccurate touch, or complete failure. Then first determine whether there are external factors, such as the power supply is not timely, the signal is weak, the antenna signal is not strong, these are common, just need to detect whether there are any of the above phenomena, and then adjust.

Then, in order to solve the anti-interference problem when designing a capacitive touch screen, the following adjustments must be made: first, add virtual wiring to the blank area on the touch screen panel, that is, fill the wiring outside the display area, and connect the added virtual wiring to each other to form virtual circuit; secondly, the virtual circuit is connected with the ground part of the touch chip to form a shielding circuit. This design eliminates the interference caused by temperature, humidity, environmental electric field, reflection and other factors to the capacitive touch screen, and has low cost and high efficiency.