Why does the mobile phone flicker when shooting the LED display?

This is because the flashing frequency of the screen is the same. Generally speaking, the screens we see are flashing, but the human eye can't tell them apart. However, if you take a photo with your mobile phone, the two screens will flash at the same time, which will strengthen the feeling of flashing. If the frequency is different, it won't flash.

this is the most basic photographic phenomenon.

The reason is that the refresh frequency of the display screen is 6 Hz, that is, the screen is changed every 1/6th second. Due to the physiological effect of visual retention, it can't be distinguished by the naked eye, but the exposure time of mobile phones and general low-function cameras is 1/125th second, so the changes of the screen that are invisible to the naked eye are often photographed.

professional photographers will increase the exposure time of the camera to solve this problem, but for beginners, it is often necessary to take compulsory anti-shake measures.

increasing the refresh rate of display screen can also help solve this problem, but the refresh rate of LED LCD screen is not much higher, which is generally 6~7 Hz.