tft lcd flicker made in china

They expose to various environments, especially now that COVID-19 spreading around the world. So it"s impossible to keep a screen clean all the time. When you are going to clean an LCD display，do you have the right steps in mind？Maybe what you"ve been doing is not right！

I"ve got a chinese 1.44" TFT - very similar to AdaFruit"s. In fact, I think it"s the same and the Adafruit ST7735 library works great with it right away.

But I have a problem: the screen is too slow to update and flickers too much. Even if I only update it once per second the flickering is still very noticeable and prevents me from achieving visual smoothness, which I will need for my project.

Note that I have set up a timer using the TimerOne library, it"s currently set for 100 ms = 10 FPS. But as I said, the code speed is not the problem, I can get higher FPS. It"s flickering that"s the problem.

I think the important clue might be that the LCD driver board"s OSD is also subject to these interferences, so it actually shouldn"t be the VGA signal that produces (most) of the noise because in that case the OSD should be unaffected as well!? I"ll see about some makeshift shielding (cardboard box+ aluminium foil?) for the board to test this hypothesis. I guess it could still be both the VGA signal and the board itself...

Could be an issue with the LCD driver or it"s PSU as well. If the caps are failing and the power provided is noisy, it"ll act up. The worse the input signal, the worse it gets. So getting the input signal to be as clean as possible is always a good thing (even if there were no other issues) but if a good quality cable is not fully fixing the problem then chances it"s not the only problem you have. Oh and same goes for video cards but if you can get a stable picture on other displays and not this one then obviously it"s the culprit.

I could rule out the PSU by getting a 12v 2a adapter... which I was holding off on because it"s exactly the opposite of what I was trying to do, running the LCD driver board off the PSU