The key switch will flutter when it is used. At this time, we need to find the reason, and find the solution, the specific reason and the treatment method. The following is a detailed introduction to you.

The reason why the key switch flutters badly is that the scanning frequency of dynamic display can not be less than 25 Hz in theory, and it usually needs more than 30 Hz in practice to have better display effect. It's normal to show when you don't press the button. It flutters when you press the button. It's because the scanning frequency can satisfy the requirement when you don't press the button. After pressing, the scanning frequency can't satisfy the requirement because of the increase of the program and many delays, so the phenomenon of "flutter" arises.

How to deal with the problem of how to reduce the running time of the key program to ensure that the scanning program can be scanned on time. Li Feng advocates placing some of the programs that appear to be scanned in the continuous processing of the timekeeper, so as to ensure the scanning frequency, and changing the delay in some of the key processing programs to the punctual interruption.

These are the problems and reasons that need to be paid attention to in the use of key switches. If there is a situation of jitter, we must find these fundamental problems to solve.