Why do water ripples appear when shooting on LED display screens?

1、LED display refresh rate

Refresh rate definition: Refresh rate refers to the number of times the LED display screen repeats the displayed image per second, measured in Hertz (Hz). Common refresh rates include 960Hz, 1920Hz, and 3840Hz.

Low refresh rate impact: If the refresh rate of the LED display screen is low, during shooting, especially when using the high-speed shutter of the camera or mobile phone, it may capture the blank period during the screen refresh process, resulting in water ripple phenomenon. Because LED screens are driven by line by line scanning, when the shutter speed is fast, the screen may not be fully illuminated.

Advantages of high refresh rate: LED displays with high refresh rates (such as 1920Hz/s, 2880Hz/s, 3840Hz/s, etc.) are less prone to this problem because their image update speed is faster and they can provide more stable and clear images.

2、 Shooting equipment settings

Shutter speed: When the camera's shutter speed is set too fast (such as 1/125 second or faster), it is easier to capture the blank period during the LED screen refresh process, resulting in water ripples. On the contrary, when the shutter speed is slow (such as 1/100 second or slower), images and text can be displayed normally.

ISO sensitivity and aperture: While reducing the shutter speed, it is necessary to adjust the camera's ISO sensitivity or aperture to ensure proper exposure of the image.

Other factors

Electromagnetic interference: If there is a strong electromagnetic interference source near the LED display screen, such as high-power appliances, motors, transformers, etc., it may interfere with the signal transmission of the display screen, resulting in water ripples on the screen.

Unstable power supply: When the voltage or current fluctuates greatly, it can also affect the normal operation of the LED display screen, which may cause water ripples on the display screen.

Display quality: Low quality LED displays may have process defects in the manufacturing process, such as unreasonable PCB board wiring, poor component quality, etc., which may lead to the occurrence of water ripples.