What causes water ripples on LED displays? How to solve it?

When shooting LED film screen images at close range with a mobile phone or camera, water wave-like stripes often appear. This is moiré, or water ripples. So how are water ripples on LED film screens produced? And how can they be solved?

What causes water ripples on LED film screens?

Water ripples are a manifestation of the beat principle. When two equal-amplitude sine waves with similar frequencies are superimposed, the amplitude of the synthesized signal will change according to the difference between the two frequencies. Water ripples generally present an irregular arc diffusion state.

How to eliminate water ripples on LED film screens?

1. Change the camera angle. By changing the camera's shooting angle or rotating the camera's focal length, you can eliminate or improve the water ripple phenomenon.

2. Change the camera position. By moving left or right or up and down to change the angle relationship, you can reduce moiré.

3. Change the focus. Too clear focus and high details may cause moiré. Changing the focus can change the clarity, which helps eliminate moiré.

4. Change the focal length of the lens. You can use different lenses or focal length settings to change or eliminate moiré.

5. Use a front filter to make its exposure conditions meet the spatial frequency, thoroughly filter out the high spatial frequency part of the image, and reduce the chance of moiré, but this will also reduce the sharpness of the image at the same time.

The above is the method to eliminate water ripples. Water ripples are not a problem with the LED film screen itself. Even if you shoot a regular LED display, water ripples will appear. It is a common phenomenon! You can only start with the shooting equipment to improve or eliminate the impact of water ripples.

The above is an in-depth analysis of causes and solutions for water ripples on LED displays. I hope it will help you understand LED displays. If you have any needs for LED displays, you can click here to jump to our LED product page to learn more about the characteristics of our brand's LED products. You can also click here to contact us and tell us directly about your specific needs. We will arrange professional personalized customization experts to provide you with the most professional services.