Moire Effect on LED Screen: Causes, Prevention, and Solution

Digital signage has continued to prove its value and is changing the world of advertising and communication. Many businesses are adopting it to engage audiences and boost sales, pivoting its growth from $24.86 billion in 2022 to $45.94 billion by 2030. These numbers mean that the need for LED screens will continue to skyrocket. 

Aside from businesses, individuals and corporate institutions now use LED screens to display content in concerts, churches, traffic LED displays, and sports arenas. Even as this method of reaching a larger audience proves to be more effective than static campaigns and other types of advertising, it comes with a few challenges, including the Moire effect.

The Moire effect is the uneven blind-like pattern on your LED screen when different patterns overlap. If you have had a Moire effect on your LED screen in the past or currently have one, keep reading. In this article, we explore the Moire effect, its causes and its impact on businesses and events, prevention measures, and how to fix it if it ever occurs.

What Is Moire Effect on LED Screens?

Moire Effect on led screen

The Moire effect is a visual distortion that appears on a screen when two similar or slightly different patterns overlap or superimpose, creating an odd pattern on your LED screens. In simple terms, the Moire effect occurs when unusual stripes appear on your display images or videos.

“Moire” is a French word referring to something watery or cloudy, and this definition relates to the undulating swatches this effect usually creates. These patterns are intrusive, visually confusing, or even disorienting to the audience’s eyes. They can interfere with the clarity of the entire or reasonable parts of the underlying image, text, or video.

For instance, if you are watching a football match or your favorite TV show and a rainbow-like, distorting pattern not similar to the original display appears, you may have a moire effect on your LED screen.

Sometimes, the effect may be large-scale, making it difficult to see the original display. We will discuss the various factors that cause the Moire effect, their solution, and how to prevent it from happening again below.

What Causes Moire Effect on LED Screens?

The Moire effect has become a widespread issue that businesses and individuals face with LED walls. While some people know what it is and why it happens, others are novices. Here’s a list of 18 causes of the Moire effect of LED screens.

  • Lower LED Screen Resolution: This means that the pixels on the screen are larger than they should be and, as a result, more visible, making it difficult to display finer details. Let’s say you are trying to display a small font size or a detailed image; a low screen resolution will cause the Moire effect to appear.
  • Insufficient Refresh Rate: A slow refresh rate means your LED wall cannot keep up with the rapid changes in graphics, resulting in flickering or blurring that can interfere with displaying the original patterns. For instance, a slow refresh rate can cause the Moire effect on the LED screen if you are playing a game at high speed.
  • Pixel Misalignment: It is essential to consider the display content when choosing a LED screen because if the pixels on your LED screen do not align for any reason, it can cause interference patterns distorting the image or video display.
  • Poor-quality Anti-aliasing: Aliasing is a distortion that occurs when your LED screen displays digital images and videos at a lower resolution than the original content. On the other hand, anti-aliasing is a technique hardware and software systems use to smooth out spiky edges and reduce the appearance of aliasing.

If the system anti-aliases poorly, it can create odd patterns that interfere with the display of your content. For instance, applying a low-quality filter to an image with parallel lines may not properly smooth out the lines. Instead, it will create a new pattern of interference that appears as a Moire effect on the LED screen.

What Causes the Moire Effect on LED Screens

  • Software or Drivers Incompatibility: Software and drivers interpret digital images or video and display them on an LED screen. When a user or software administrator uses incompatible software or drivers, they may not properly interpret the content data, leading to visual phenomena such as the Moire effect on LED screens.

Also, incompatible software or drivers can lead to incorrect scaling or resolution of an image or video, making the Moire effect worse than it already is.

  • Poor-Quality Video Cables: When displaying content with a LED screen, it is essential to use only high-quality facilitators. For instance, using low-quality video cables to connect your LED wall to other devices also causes the Moire effect. 
  • Overlapping Elements on Your LED Screen: When two patterns overlap or superimpose on the LED screen, it can create interference patterns causing the Moire effect. Some examples of overlapping elements on an LED wall include:
    • Multiple tabs in a web browser that is open simultaneously overlap each other.
    • Displaying dialog boxes or pop-up windows on other windows on your LED screen.
    • Overlapping images or graphics, such as icons or logos
    • User interface elements, including buttons or menus, sit on top of other elements within an application or website.
    • Overlapping text or other content, like captions or annotations, displaying on top of images or video.

Generally, any visual elements displaying one another on an LED wall or other display device are overlapping.

  • Complex Structures or Designs: Structures and designs containing repeating patterns or fine details are vulnerable to the Moire effect. View them at a lower resolution or overlay them with similar or slightly different patterns. They will create interference swatches that can appear as extremely spiky edges and a Moire effect on your LED screen.

For example, a complex geometric design with fine lines or repeating patterns may appear smooth and well-defined when you view it at its original size. Still, when you proceed to scale it down or find a balance by overlaying it with other similar designs, it will create the Moire effect.

  • Text With Thin Strokes or Small Font Sizes: Thin strokes or small font sizes contain minute details and high-frequency swatches, which are difficult for a screen to reproduce accurately. When you view content like this on an LED screen with a low pixel density, these details may appear to overlap with other similar patterns, resulting in the Moire effect.
  • High Contrast Images: High contrast images have sharp transitions between light and dark areas. These transitions can create high-frequency patterns that are difficult for a screen to reproduce. 

For example, a high-contrast image of a black-and-white checkerboard will likely create the Moire effect when viewing it on an extremely low-resolution LED wall. Other similar swatches will uninterruptedly overlay the checkerboard pattern.

  • Reflections From External Light Sources: External light sources, like overhead lighting or direct sunlight, can create reflections on an LED screen while interfering with the patterns on the surface.
  • Interruption From Electronic Devices: If a nearby electronic device emits a similar pattern of electromagnetic waves, it can interfere with an LED screen’s pixel pattern, creating the Moire effect. Some examples of electronic devices that emit electromagnetic waves include Cell phones, Wi-Fi routers, Bluetooth devices, and microwave ovens.
  • Pixelated Images: Various LED walls have a fixed pixel density, meaning they can only display a specific number of pixels per inch. So, when the LED screen displays videos or images, the pixels of such content must align with existing pixels of the screen to have a visible display.

However, when an LED screen displays media content with a different pixel density, the pixels of the image may not align with the pixels of the screen, causing a Moire effect on the LED screen.

For instance, if you display an image with a low pixel density on an LED screen with a high pixel density, the image pixels will scale up to fit the LED wall’s original pixel density. The same goes for a high pixel density displaying on an LED screen with a low pixel density; the pixels of the image will scale down, causing the Moire effect.

  • Viewing Distance: When you are at a certain distance from your LED screen, the relative angle and frequency of the pixel pattern can create an interference pattern, leading to a Moire effect on the LED screen. The distorting pattern may change slightly or disappear if you move closer or further from the screen.
  • Physical Damage To the Screen: Light passing through a scratched or cracked screen can be diffracted or scattered in various directions, creating interference patterns overlapping on the underlying image. This interference then interacts with the image’s pixel pattern, forming a Moire effect on the LED screen.
  • Displaying Content Not Suitable For Your LED Screen: Your LED wall consists of light-emitting pixels; the spacing and arrangement of these pixels determine the resolution and quality of the display. However, when displaying videos or images not suitable for your LED screen, the pixel structure of the screen can interact with the content, creating the Moire effect.
  • Incorrect Color Calibration: LED screen color calibration is the process of adjusting the color and brightness of your screen to represent the colors of an image or video accurately. If you do not calibrate your LED screen properly, the colors you have on the screen will not match the actual colors of the image or video. 

Let’s say your LCD screen displays content as overly saturated; the Moire effect will become highly visible when displaying certain patterns, such as diagonal or circular patterns.

  • Improper Scaling: Scaling involves changing the size of an image or video to fit a particular screen size or display resolution. When a designer or an editor doesn’t scale images or videos properly, the pixels of the original content may not align with the pixels on the screen, causing the Moire effect. 

As stated earlier, the Moire effect is a common occurrence that can happen to any business or individual using an LED screen for display. But, the severity and frequency depend on the purpose, the individual, the type of screen, and the content for display.

The Impact of the Moire Effect on LED Screen Content

Moire effect is disruptive and can pose severe problems, especially when hosting important events. Imagine you are in a conference meeting presenting with the indoor office LED screen. Suddenly, the images and texts appear skimpy and unclear; your team will have no choice but to move the meeting due to the disruption or continue without the presentation.

What about events that you cannot salvage? In this section, we highlight how the Moire effect affects the quality of display content, how it affects businesses, and its impact on various events.

The Impact of the Moire Effect on LED Screen Content

How Moire Effect Affects the Quality of the Content Displayed on LED Screens

The Moire effect can affect the text, graphic, image, or video you are displaying in several different ways, and they include the following:

  • Image Distortion: The Moire effect can cause the image on the LED screen to appear distorted or blurry, making the display less appealing and leaving the audience with a terrible viewing experience. 
  • Less Contrast: The Moire effect can reduce the contrast of the content you display on the LED wall. Lesser contrast automatically removes the original image structure giving it a flat appearance.
  • Poor Clarity: It can also reduce the clarity of the content you showcase on the LED screen, making the image appear slightly blurry, unsharp, and lacking detail while ruining the viewers’ experience.
  • Flickering: The Moire effect can cause the screen to flicker or pulse, distracting and unpleasant. This can be noticeable when the screen displays high-contrast images or moving content, such as videos.
  • Text Distortion: During a text presentation, the Moire effect can break up texts, making them unreadable or nearly unreadable because of the interaction between the pixels of the LED display and the content.
  • Jagged Edges: If you are presenting texts or images with jagged edges due to the Moire effect, it can make the content look unprofessional, lower its quality, and even distract your audience from the actual message you want to convey.
  • Moire Patterns: When the Moire effect is present, it can create uneven patterns on the screen, distracting and confusing the viewers. These patterns are quite obvious in areas with regular patterns, such as in the background of an image.
  • Color Banding: Certain colors and patterns may look great on your smartphone or personal computer, but it doesn’t mean they will look good on LED walls. When gradients and smooth color transitions appear blocky, you have a Moire effect on your LED wall. 
  • Ghosting: Another way to determine if you have a Moire effect LED screen is if the images or texts on your screen appear to have a trail or an afterimage, especially in areas with fast movements.
  • Rainbow: The Moire effect can create various uneven patterns on your LED screen, including the highly visible rainbow effect, lowering the quality of the text, graphic, image, or display video.
  • Motion Artifacts: You can determine if you have a Moire screen using different ways; another determining factor is when your display content is stuttering or juddering, reducing the communication and quality of your display.
  • Clashing Patterns: When patterns clash due to the Moire effect, it can make the content look busy and reduce quality. This occurs when there are multiple patterns or textures on the screen, which can interact with each other and create unwanted Moire patterns or interference patterns.

The Impact of the Moire Effect on Businesses That Rely on LED Screens for Advertising or Communication

Many businesses rely on LED screens for various reasons, including commercial LED displays, conference meetings, product displays, etc. This advertising method benefits them since 63% of consumers relay that digital signage grabs their attention better than traditional static media. 

Having so much positive impact on consumers, imagine how terrible it will be for businesses that regularly have a Moire effect on their LED screens. Luckily, there are preventive measures and solutions for this effect. However, let’s first look at the impact of the Moire effect on businesses that rely on LED walls for advertising or communication.

  • Reduced Visibility: When the Moire effect occurs, it can make the text, graphics, image, or video on the LED screen break up and be difficult to read or understand. This can reduce the visibility of the message you are trying to relay, making it less effective.
  • Ruin Brand Image: If the Moire effect is always present on a business’s LED screens, it can create a negative brand image. For instance, if you constantly display ad videos in your establishment, and they always have the Moire effect, customers will perceive your business as unprofessional, eventually damaging your company’s reputation.
  • Miss Out on Opportunities: Many business display promos and sales offers on LED walls in their organizations. If the Moire effect makes the content on the screen difficult to comprehend, customers may miss important messages or promotions. The business will miss opportunities to generate sales or increase brand awareness.
  • Distraction: No matter how reasonable the message may be, anyone would lose interest in a skippy or unclear display. The Moire effect can distract viewers, taking away their attention from the display content.
  • Difficulty Representing Brand Products: When displaying brand products, you want them to appear as beautiful as the original. But what happens when the Moire effect causes colors to shift or appear differently? It becomes difficult for you to accurately represent your brand, products, and services.
  • Eye Strain: When a Moire effect on a LED screen stays for longer periods, it can cause eye strain in viewers. The audience will become uncomfortable and eventually ignore the display text, image, or video.
  • Negative Word of Mouth: Most people buy from a brand due to referrals from people they trust. However, customers who are dissatisfied with the quality of your LED wall display will share negative reviews about your business, discouraging others from engaging with them.
  • Higher Maintenance Costs: LED screens prone to the Moire effect require more frequent maintenance, increasing the operational costs of using this technology.
  • Lower ROI: If the Moire effect impacts the effectiveness of your business’s advertising or communication campaign, it will lead to poor customer acquisition and a lower return on investment (ROI) over time.

The Impact of the Moire Effect on Businesses and Events

The Impact of the Moire Effect on Events

Every event needs an appealing display to light up the room and entertain the audience. Various corporate and institutions use LED screens in situation rooms, decision theaters, and churches to display important information and religious content.

Your event is all fun and engaging until your LED screen becomes glitchy and starts to cause interruptions in the content you display. Such small situations could turn your amazing event into a nightmare. Here are some of the negative impacts of a Moire LED wall on your event.

  • Distraction: The Moire effect creates a distracting pattern that can draw the audience’s attention away from the event’s main focus. Especially if you are hosting the event to convey important information or the attendees must focus on specific elements, such as speakers or presentations.
  • Disorientation: Not everyone can withstand strong visual inconsistencies; no one should undergo such a situation. Moire effect on LED screens cause disorientation or motion sickness in some people, making it difficult for them to engage with the event and even leave early.
  • Misinterpretation of Content: It is easy to misinterpret graphics, images, and videos that are distorted, blurry, and skipy. The Moire effect can create new shapes or patterns, confusing your audience and leaving them to give another meaning to the display content.
  • Poor Engagement: The distraction of the Moire effect on a LED screen display can reduce attendees’ engagement and participation in the event. Instead of listening to the speaker, asking questions, or engaging with the event’s LED display, they will focus on murmuring about the occurrence to one another.
  • Reduced Credibility: It takes years and some level of trust for individuals to attend a particular event consistently. They want a mind-blowing experience. A Moire effect on a LED screen can reduce the event’s credibility and professionalism, harming the host’s reputation and making it less likely to return.
  • Negative Impact on Sponsorships: The Moire effect can harm sponsors’ return on investment and future sponsorship opportunities if it appears in their branding. Sponsors lose interest and will be less likely to support your event.
  • Social Media Backlash: In today’s world, where social media makes it easy for people to connect and know what’s going on with others in real-time or near real-time, having a disastrous event is a no-go area for individuals and businesses. 

This is because there is a 100% probability that your attendees will share negative experiences of your screen’s Moire effect on social media, harming the event’s reputation.

  • Poor User Experience: Providing a smooth and enjoyable experience for your audience is the secret to succeeding in whatever industry you are in. Interruption from the Moire effect goes against this successful hack. 

It can create a poor user experience for the attendees interacting with digital or appealing elements of your event. This will make it harder for them to engage with the display content and even reduce their overall satisfaction with the event.

The moire effect on LED screens produces experiences that deter attendees from returning to future events.

Prevention of Moire Effect on LED Screens

Now you know the Moire pattern, its causes, and its impacts on events and businesses that rely on LED screens for advertising. Let’s explore the effective prevention methods of the Moire effect below:

  • Use an LED Screen With a Higher Pixel Density: Using a screen with a higher pixel density will make it more difficult for the screen to pick up patterns while reducing the likelihood of the Moire effect.
  • Adjust the Screen’s Refresh Rate: As we said earlier, the refresh rate of your LED screen can cause flickering, resulting in a blurry-looking or jagged-like effect on texts, images, and videos. But if you adjust the refresh rate properly, you can prevent the Moire effect.
  • Use a Matte Screen or Anti-glare Coating: Long exposure to direct sunlight and harsh ambient lights is one of the causes of the Moire effect on LED screens. However, a matte screen or anti-glare coating can help reduce reflections on your LED wall.
  • Use Topnotch Video Cables and Connectors: To prevent distraction during display, use high-quality video cables and connectors. They are an essential part of interference reduction and Moire effect prevention.
  • Use a Video Signal Processor: Experiencing the Moire effect when using multiple LED screens is almost inevitable. However, you can use a video signal processor to adjust the frequency and timing of the signal to prevent the Moire effect.
  • Use a Diffuser to Soften Light the Screen Emits: If you want to reduce interference and prevent the Moire effect from happening to your screen, use a diffuser. The diffuser will the light emitted by your LED screen.
  • Avoid Using Small Texts or Contrasty Patterns: Another way to prevent the Moire effect is by avoiding the use of small texts or patterns with high contrast. Instead, use medium-sized texts and patterns with average contrast—not too low, not too high.
  • Use a High-quality Graphics Card With a Good Anti-aliasing Filter: Displaying texts and images with jagged edges can ruin your presentation. But a top-quality graphics card and good anti-aliasing will smooth out the edges on your LED wall and prevent the Moire effect.

While occurrences of the Moire effect on LED screens are becoming rampant, we have various ways to prevent it, including using high-quality equipment and avoiding patterns and colors that can create disruption.

How To Prevent Moire Effect on LED Screens

How to Minimize the Moire Effect on LED Screens

The Moire effect is one of the biggest challenges companies and individuals using LED screens experience, and it can ruin important business meetings, advertising campaigns, and other special events. Suppose you have experienced the Moire pattern on your LED wall or are currently struggling to minimize its effect; the following tips will come in handy:

  • Adjust the Resolution: Adjusting the resolution of an LED screen can help minimize the Moire effect since, Moire patterns come from interference between the pixel pattern on the screen and the pattern in the text, video, image, or graphic you are displaying. 

When you adjust the resolution of your LED wall, you automatically change the spacing of the pixels and reduce the uneven patterns appearing. Nevertheless, reducing the resolution can also reduce the image quality and clarity, so it’s advisable to find a balance between reducing the Moire effect and maintaining image quality.

  • Use a Diffuser: A diffuser is a material that distributes light evenly. Using one on an LED screen can reduce the Moire effect. Placing the diffuser over the screen will blend the pixel pattern, making it less noticeable and reducing the chances of Moire patterns appearing.
  • Select the Right Pixel Pitch: In millimeters, pixel pitch is the distance between the center of each pixel on your LED screen from the middle of the other pixels surrounding it. Selecting the right pixel pitch can reduce the Moire effect. 

Choosing a larger pixel pitch means you are availing more space between each pixel, reducing the chances of having Moire patterns on your LED wall. But, a larger pitch also denotes your screen will have a lower resolution.

  • Proper Calibration: Have you ever transferred an image from your computer to your mobile phone, then noticed that the color differs from the original image? It means that your PC’s LED wall is not calibrated. 

Calibration involves adjusting the color and brightness levels to ensure that it displays the original colors in any image you are displaying. Properly calibrating your screen can reduce these patterns and minimize the Moire effect.

  • Use Anti-Aliasing Filters: Anti-aliasing filters help smooth out jagged or skipy edges on texts and images by adding additional pixels. It reduces the sharpness of the edges, which in turn reduces the appearance of Moire patterns.
  • Utilize Multiple Panels: Using numerous smaller LED video wall panels instead of one large screen can help to minimize the Moire effect on your display. When you break the screen into smaller sections, viewers’ eyes will not pick up on existing or emerging Moire patterns.
  • Adjust the Refresh Rate: The refresh rate of an LED screen is the frequency at which you update the video, text, graphic, or image. A higher refresh rate will make the content you display appear smoother and reduce Moire patterns’ noticeability.
  • Change the Audience Viewing Distance: It is no strange news that the distance between the viewer and the screen can impact the appearance of Moire patterns. To minimize this pattern, change the viewing distance and try moving closer to the screen or further away to reduce the visibility of Moire patterns.
  • Use Noise Reduction Filters: Many videos, images, and graphics harbor artifacts that originally shouldn’t be there. This noise shows a Moire pattern, which you can minimize with noise reduction filters. 

You are lucky if your LED wall manufacturers builds-in noise-reduction filters to help reduce the Moire effect. The filters work by analyzing the image or video and removing patterns that could cause Moire patterns to appear.

If you are unsure how to do this yourself, ensure you reach out to your manufacturer to help you make any necessary adjustments. Also, if you are using a rental LED screen, do not hesitate to quickly contact your borrower to inform them of the changes on the display before you adjust the LED wall settings.

How To Fix Moire Effect on LED Screens

To fix the Moire effect on your LED screen, you can either work with your manufacturer or a professional or do it yourself. If you decide to go DIY, here’s a step-by-step guide to help you fix your screen.

  • Identify the Cause of the Moire Effect: The first step in fixing your LED screen’s Moire effect is identifying the underlying cause. You can do this by examining the pattern on the screen and checking for abnormal swatches. 

The Moire pattern could be happening for many reasons. So, ensure you also analyze the type of content you are displaying, the settings of your display device, screen resolution or aspect ratio, and electronic devices near the screen.

  • Adjust the Screen Resolution and Aspect Ratio: If you discover the source of the Moire effects on the pixel grid’s visibility, you can try adjusting the screen resolution to a lower setting. This will make the pixels larger and, in turn, lower the grid visibility. Ensure you do not go too low to avoid low content display quality.

In the same vein, each LED screen has a different aspect ratio that differentiates it from other screens. Always use the correct and only manufacturer-recommended aspect ratio for your LED wall.

  • Change the Refresh Rate: If the pixel grid is not highly visible, it is time to check the refresh rate. If the Moire effect is from the interaction between the display frequency and the refresh rate of your LED wall, try changing the display frequency to a different setting and play around with it until you find a suitable setting.
  • Adjust the Display Settings: The contrast, saturation, brightness, and other display settings can also prompt the Moire effect. If the resolution is perfect and the refresh rate is not low, the next thing to do is to try adjusting these settings to see if it improves the display quality.

How To Fix Moire Effect on LED Screens

  • Use a Different Video Cable: Manufacturers do not create all cables equally; the cable connecting your computer to the LED screen can also affect the Moire effect. Check the following:
    • Cable Quality: A poor-quality video cable may not transmit the signal properly, leading to intrusion or other visual distortions on the LED screen. Upgrading to a better-quality cable will enable you to eliminate the Moire pattern issues.
    • Shielding: Another important factor to consider when it comes to video cables is shielding. Shielding is the metal layer surrounding your cable and helps block clashes from surrounding electronic devices.

If the shielding of your cable is inferior, it may pick up intrusions from nearby devices, which can contribute to the Moire effect. It will help to use a video cable with quality shieldings, such as an HDMI or DisplayPort.

  • Cable Length: The length of the cable can also impact its performance. If the cable is too long, it may not be able to transmit the signal effectively, leading to distortion or other issues on the display content. In some cases, using a shorter cable can help to improve the LED display’s quality.
  • Use an Anti-glare Screen: Reflective LED walls contribute to Moire patterns. Try using an anti-glare screen; if you cannot access one, position your screen in a way that reduces reflections. If you don’t, you can avoid lighting that creates reflections or glare on your LED screen. prone to Moire.
  • Use Software Solutions: After checking the above possible Moire effect sources and if it persists, check if the pattern is present in images or videos. If so, software solutions to eliminate them are available.
  • Replace the Screen: Explore all the possible problems and try fixing them. However, if none of the above solutions work, it may be time to replace the LED screen. But before you do so, contact a professional to help you inspect it again. 

All screens have different components, qualities, and manufacturers. It pays to invest in a high-quality LED wall, and you will spend less on maintenance, and quality screens are also less prone to Moire.

  • Use High-Quality Content: Low-quality images, texts, videos, and graphics usually contain Moire patterns. Ensure you use high-quality images; they are free from Moire patterns.
  • Ensure Proper Calibration: Proper calibration makes the content you display more appealing. Therefore, ensure you accurately calibrate your LED screen’s colors and brightness levels. Also, changing the viewing distance can reduce Moire patterns, but ensure that the viewing distance is optimal for the screen, or else the Moire effect may become too obvious.

If you follow these steps accordingly, you can fix or minimize the Moire effect on your LED screen.   

Comparing Different LED Screen Technologies and the Moire Effect

While the Moire pattern can potentially distort all LED wall types, it is important to analyze how it affects various LED screens and models. Doing this will let you know the first place to check and the specific action to take if your LED screen misbehaves.

Different LED Screen Technologies and the Moire Effect

  • Direct View LED: DVLED screens have a higher pixel density than surface-mounted device LEDs and Chip-on-Board LEDs, and of course, this pixel density level can increase the chances of the Moire effect occurring. 

However, they also have superior brightness, contrast, and saturation, which can help minimize the effects of the Moire pattern on your display. In addition, the high-resolution characteristic of DVLED screens makes Moire patterns less noticeable from a distance.

  • Surface-Mounted Device LED (SMDLED): These screens have lower pixel density than Direct view LED screens, and this can enable SMD LEDs to show off less Moire effect than DVLED. 

Even though this is an advantage, it is essential to know that if the pixel pitch is too low, the Moire effect can still be noticeable, especially when the distance between the viewer and the screen is close.

  • Chip-on-Board LED (COBLED): The COBLEDs have a higher pixel density than SMDLED screens, making the odd pattern more noticeable if the pixel pitch is too low. 

However, COB LED screens are mostly for outdoor displays and large-scale digital signage with far viewing distances. The Moire effect is less obvious on COBLED screens.

  • Mini-LED: Mini-LED is a newer LED screen technology. It uses smaller LED chips different from the ones traditional LED screens use. The smaller size of the LED chips offers a higher pixel density, which makes it more prone to the Moire effect. But the Moire pattern will be less obvious at farther viewing distances.
  • OLED: Organic Light-Emitting Diode screens use organic compounds that emit light when one passes an electric current through them. OLED screens have high contrast, wide viewing angles, and deep blacks. 

However, they have a lower pixel density than other LED screen technologies, and this can help reduce the Moire effect. The organic compounds OLED screens use can also minimize the visibility of the Moire pattern because the compounds blur the edges of the pixels.

The Moire pattern affects all LED screen technologies, but the severity of the effect depends on factors such as pixel density, viewing distance, and the type of LED technology.

Frequently Asked Questions (FAQs)

1. What Is the LED Dirty Screen Effect?

The LED dirty screen effect (DSE) is a visual distortion that occurs on LED screens, especially large LED screens with uniform colors and light tones, such as white backgrounds, sports fields, and sky scenes. The dirty screen effect usually appears as a subtle grid pattern or a series of dark, lighter, or discolored spots that seem to spread across the screen. 

One of the causes of DSE is manufacturing imperfections in the LED panel and the optical diffusers that scatter the light emitted by the LEDs, creating an odd distribution of light.  Over the years, manufacturers have come up with measures to reduce it, but it is essential that you look out for signs of DSE when shopping for an LED display.

Ensure you choose a high-quality screen from a reputable manufacturer. Also, frequent cleaning of the LED screen using a microfiber material can help remove any dust or debris contributing to the effect.


The Moire effect on LED screens occurs when two similar or slightly similar patterns overlap, causing interference in the content you display. This effect does not only affect a particular screen type or model. All LED walls are prone to the Moire pattern. But knowing its causes, prevention, and how to fix it can help you know what to do when it occurs.

Also, if you are looking for rental LEDS or want to purchase a brand new LED motion advertising screen with high-quality cables, proper calibration, free installation, and years of warranty, do not hesitate to explore NSE LED’s various LED wall options.

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