Moiré effect in LED displays usually appears as repeated patterns or ripples on the display. It is a visual phenomenon caused by interference between two or more different grid-like structures (such as an arrangement of LED pixels and perception by a camera or eye). Specifically, when the angles and frequencies of two grid-shaped pixel arrays interfere, the light and dark parts of the grids overlap each other, resulting in a moiré phenomenon.
There are two main reasons for the formation of moiré patterns: First, the refresh rate of the LED display. If the refresh rate of the LED display is too low (such as below 1920Hz), moiré patterns will easily appear when shooting with a mobile phone or video recorder; second, Due to the aperture and focus distance of the shooting equipment, moiré patterns can be avoided by adjusting the camera angle and position, changing the focus, and the focal length of the lens.
To eliminate the moiré phenomenon, you can start from two aspects: LED display and shooting equipment. From the perspective of LED displays, increasing the screen refresh rate can reduce the occurrence of moiré; from the perspective of shooting equipment, using a large aperture to shoot can reduce the chance of moiré. Obvious places" to avoid moiré patterns.