A video wall is not a one-size-fits-all solution. There are many options to choose from when designing a commercial building video wall display: the size and shape of the digital canvas, what type of content will be displayed and the purpose of the video wall. Operationally, you may focus on desired reliability, maintenance and serviceability of the equipment. Hardware and technology decisions ensure the video wall will deliver both the desired viewing and ownership experience.
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One of these choices is deciding between an LCD display or an LED video wall. Continue reading to find out more about the basics, as well as the advantages and disadvantages of each solution.
About LCD Digital Screen Displays
Most people are familiar with LCD technology, which stands for Liquid Crystal Display. These types of displays have a massive presence in this world, used in living rooms to watch movies, fast-food restaurants to showcase menus, airports to show flight schedules, and everything in between. LCD technology was developed in the s and has been used worldwide as a standard for roughly 20 years. It is a tried-and-true technology that has stood the test of time and will be around for the foreseeable future.
On an LCD screen, the panel is illuminated by a light source and works through reflection or transmission of light. Overall, LCD displays have better viewing angles and less glare than LED screens. This technology was designed to be energy efficient and tends to be lighter in weight.
How does an LCD screen display work?
In an LCD monitor, there are multiple layers behind the protective glass on the screen that work together to produce an image:
Thin layer of liquid crystal material placed in between two layers of electrodes and glass
Color filter to produce colors
LED backlight behind the glass and color filters to emit light
LCD video wall displays differ from those mentioned in the above use cases in that they are designed and built specifically to serve video walls.
An LCD video wall is made up of multiple LCD panel monitors mounted on a surface to create a digital canvas, which then work together to create a unified experience. They operate 24/7 at a high brightness and have thin bezels that help create a seamless look when the displays are placed next to one another.
Bezel thickness and the brightness rating are among key attributes to consider for an LCD video wall display. Here is what each of these means and why.
Bezel:
Bezel thicknesses for video wall displays are measured in &#;bezel-to-bezel&#; thickness.
This is the thickness of the bezel when two displays are placed next to one another. Displays can be either large bezel or thin bezel.
Nits:
Brightness is measured in Nits. A higher Nit value means the display will be brighter. A brighter display is necessary in a room that sees plenty of direct sunlight, or if the intent is to draw in visitors from far away. With LCD video walls, the price of the hardware goes up as the display size and brightness increase, and the bezel width decreases.
The next item to consider is the type of content that will be displayed on your video wall. LCD displays have high resolution screens &#; modern 4K displays have over 8 million pixels! This means that the content being displayed is highly detailed and crystal-clear. A viewer could stand less than 1 foot away from the screen and be able to see exactly what is being shown on the screen.
Like previously mentioned with LCD video walls, an important consideration in the decision-making process is the type of content that will be displayed on the video wall. LED video walls suffer from image degradation and pixilation from up close, so fine details will be lost, and text will be illegible. If detail from up close is important, LCD displays are much better suited for that situation.
Content examples that are well-suited for an LCD video wall:
Fine text for directory listings
Transit schedules
Announcements
News, weather, and stock tickers
Wrapping it up
Video walls add exciting drama and premium value to showcase spaces. It is an investment that adds a perfect eye-catching solution for a busy lobby, conference room, or any other space.
Video walls are relatively new. But LCD technology has had decades of mainstream adoption, and with that comes both familiarity and lower costs. If those are important to you, then an LCD video wall is likely the right choice.
An LCD video wall will provide a fantastic experience for the user if:
The intent is to have more informative and detailed content
The content must be viewed from a close distance
About LED Digital Screen Displays
LED video walls are similar to LCD video walls, but the digital canvas is built using LED panels. Individual LED panels can be anywhere from 12&#;x12&#; to 36&#;x18&#;, which is much smaller than LCD displays. LED panels have a larger presence in this world than most might think&#;they are found indoors and outdoors at stadiums, arenas, concert venues, airports, and in use as large digital advertisements in iconic places such as Times Square.
LED panels are made up of 2 main components: the cabinet and the module. The cabinet houses internal components such as cabling and circuit boards.
The module is a small rectangular board that contains all the individual LEDs (light-emitting diodes). Unlike LCD, there is no glass or color filter on the LED video wall panels. The individual diodes that are placed on the modules produce both color and light.
One of the most impressive features of LED panels is that they can be combined to create almost any shape, without a bezel interrupting the digital canvas. LED video wall panels can be placed on curved surfaces, 90-degree edges, and other non-standard surfaces. The smaller size of the panels in relation to LCD video wall displays means they can fill more space on a surface&#;they aren&#;t limited to standard 46&#; and 55&#; sizes as are LCD video wall displays.
Explore our LED video wall options and configurations by downloading our Product Catalog.
A Note on LED Pixel Pitch
The most important factor to consider when scoping LED panels for a video wall is what is referred to as &#;pixel pitch.&#; The pixel pitch is effectively the distance between each pixel on the LED panel&#;a pixel pitch of 6mm means each pixel is spaced 6 millimeters away from the adjacent pixel. The smaller the pixel pitch, the smaller the distance is between each pixel, which means there are more pixels per square inch on the digital canvas.
Deciding which pixel pitch is best for a space typically requires input from technical specialists, but here&#;s a good rule of thumb to follow:
Multiply the pixel pitch by 3 to get the
minimum
distance in feet a viewer must be from the wall to be able to interpret the content
viewing experience &#;
For example, a pixel pitch of 4mm would require a viewer to be 12 feet away to decipher any details in the video wall, and 40 feet away for the best viewing experience.Pixel pitch factors into viewing distance. When the pixels are close together, the image is more detailed and can be viewed comfortably by others from a close distance. But when the pixels are spaced further apart, a viewer needs to stand further away to view the image clearly.
Lastly, pixel pitch impacts the price of the LED video wall more than any other factor. For example, a 2mm pixel pitch LED video wall costs significantly more than its 10mm pixel pitch counterpart.
Is LED right for you?
As is the case with an LCD video wall, an LED video wall will add exciting drama and premium value to showcase spaces. LED panel displays don&#;t enjoy the benefit of decades of mainstream adoption as do their LCD counterparts. However, the technology curve is increasing their availability and lowering their costs. At this time, an LED video wall will have higher upfront costs compared to an LCD video wall. If cost is the main concern, then an LED video wall system will not likely fit into your budget
An LED video wall would be well-suited and cost-justified if the intent of the video wall is to provide an immersive viewing experience from a further distance. This could be content with lots of movement, animation, imagery, and bright colors to draw viewers into your space or provide a unique experience.
Aside from LED video wall cost, there are other factors to consider which could make an LED video wall system the frontrunner for your project. Here are the advantages and disadvantages to consider:
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LED Video Wall Advantages
No bezel:
LED panels are combined to create a bezel-less, uninterrupted digital canvas
High brightness,
high contrast ratio, no glare:
creates brighter, darker, more vivid colors that can easily be seen in direct light
Limitless shapes and sizes:
the smaller size of LED panels allows them to be combined to create unique canvases, including curved, 90-degree edge, and other combinations not possible with LCD displays
High refresh rate:
ideal for moving content; creates extremely smooth motion on the display with no judder
Easy maintenance and service; high reliability:
LED module replacement takes seconds with little effort; LED panels are rated with a lifetime of 80,000-100,000 hours, depending on the product
Indoor or outdoor:
outdoor LED panels are 100% weatherproof and can withstand extremely high and low temperatures
LED Video Wall Disadvantages
Image degradation from up close:
LED panels lose clarity and detail the closer the viewer stands from the panels
High upfront costs
: LED panels are consistently coming down in price, but one can generally expect to pay much more for LED than LCD
Wrapping it up
Video wall systems come in all shapes and sizes. The components used to create the video wall experience vary widely. Consider variables other than video wall cost when scoping out both the content and the hardware. Because these parts and pieces could make or break the captive viewing experience you&#;re hoping to achieve, or worse, defeat the entire purpose of that video wall.
So if you&#;re looking to buy a video wall in the next year, talk to us about your plans. We&#;ll discuss your goals and options to determine what digital video wall package and digital directory elements are right for you. Contact us today to get a free video wall consultation.
Many people know Christie for our projectors &#; which makes sense, we&#;ve been manufacturing projectors for almost 65 years &#; but we also specialize in video wall solutions. We manufacture secure, TAA-compliant LED and LCD video wall displays, and content management and processing technologies to create complete AV solutions. We help partners and customers around the world determine the best video wall solution for their projects, whether it&#;s a mission-critical control room, a stunning lobby installation, or an engaging retail display.
So how do you know what video wall technology is right for you? Should you choose an LED video wall or go with LCD?
Let&#;s look at the factors you need to consider and the advantages and drawbacks of different direct-view display technologies for each.
Seal Telecom, a Convergint company, selected Christie LCD panels for a control room in Brazil.
Brightness requirements vary, so the key is to find the right amount for your application and space. You&#;ll need higher brightness to improve overall contrast in environments where ambient light is high &#; such as rooms with walls of windows. However, if people work close to the video wall, for example in some control rooms, too much brightness can cause headaches or eye strain over time. On the other hand, if the wall isn&#;t bright enough, the contrast will likely be too low, making it difficult to discern detailed images and text on the wall.
If you start with a higher brightness display, 700 nits up to , you can reduce brightness to an acceptable level for the ambient light in your space. This has several benefits, including:
Power efficiency &#; Running a 700-nit panel at 500 nits draws less power than a 500-nit panel at 500 nits
Extended life &#; Running at reduced power lowers the thermal profile on the display, extends the life of the LEDs or LED backlight, prevents failures, and reduces cooling requirements
Improved black and low-level gray on LCD panels
LED video walls can display content clearly even in high ambient light environments. This is thanks to the high brightness typical of LED tiles and high contrast ratios. The result is an outstanding perceived level of black that results in a high-contrast image even in elevated levels of ambient light.
MicroTiles® LED creates a nearly seamless video wall display and is available in pixel pitches ranging from 0.75mm to 1.5mm.For a greater viewing experience, a video wall display should be completely seamless so that viewers don't notice the transition from one screen to the next in a tiled array.
LCD panels minimize this transition with bezels that are less than 1mm. For large video walls, where viewers are typically three meters (10 feet) or more away, we can consider any gaps, in combination with the bezel, as negligible. Near-seamless LCD panels can be fragile to handle &#; but you can overcome this by having trained professionals build your wall.
By contrast, best-in-class LED tiles are truly seamless and are designed to touch each other without increasing the distance between the pixels from one tile to the next. They include direct-mount systems with advanced mechanical design integrating x, y, and z-axis&#; to fine-tune physical adjustments for near-perfect alignment. Advanced software capabilities should include automatic seam correction to further enhance the seamless image quality.
Are you looking for more tips and advice for selecting video wall technology? Check out our tech brief Discover the advantage of LED video walls. (You just need to add your address to access the guide.)
Your content should look brilliant on a new video wall system, but will it maintain that same level of performance over time?
If factors such as color uniformity, brightness uniformity, and imaging quality aren&#;t your highest priorities, then LCD panels may be the best and most cost-effective solution &#; especially if your application doesn&#;t require 24/7 operation.
However, if image quality is paramount, LED displays might be the best choice. Best-in-class LED walls offer advanced capabilities that optimize the image and automatically maintain color uniformity and brightness over its lifetime.
The optimal viewing distance is the point where the viewer can no longer distinguish individual pixels. For LED, we calculate viewing distance by multiplying the pixel pitch (mm) by 8. For a pitch of 1.25mm, the optimal viewing distance is 10 feet (1.25 x 8). While tiled LCD solutions can achieve a pixel pitch as small as 0.37mm, making close-up viewing possible and viewing distance a non-issue.
A big benefit of LCD panels is their low initial price. LCD panels can be a fraction of the initial cost of an equivalent LED-based system. Although operational lifetime is lower and there are other performance compromises, LCD panels could be the most appropriate solution for an application with a tight budget.
A video wall forms a complete and integrated solution when it&#;s combined with content management and processing technologies.
All displays consume power and require cooling &#; so you need to consider ongoing operational costs such as power consumption and heating, ventilation, and air conditioning (HVAC) &#; but not all display technologies are the same.
LED displays generally draw more power and require more HVAC than LCD displays. However, LED video walls are more energy-efficient than LCD panels. The difference in efficiency can be as high as 400% or more, depending on which displays you compare.
A video wall forms a complete and integrated solution when it&#;s combined with content management and processing technologies.
You can directly integrate Software Defined Video over Ethernet (SDVoE) solutions into your video wall for uncompressed, zero-frame latency, artifact-free content over 10G networks.
With the right image processing solution, you can display 4K@60Hz content and scale and position content across synchronized outputs. For environments like control rooms, some video wall processors can securely display, arrange, and operate multiple sources.
Best-in-class LCD and LED video walls enable full service from the front to reduce repair time and downtime and don&#;t require special mounts that add cost and complexity. The best systems leverage remote video sources, controllers, and power supplies to simplify maintenance and minimize disruption.
Christie Professional Services is one of the industry&#;s most trusted advisors in designing, manufacturing, deploying, and supporting professional AV display systems, including video walls. With strategic locations worldwide and a comprehensive network of customer service engineers, project managers, and training and service technicians, Professional Services can rapidly dispatch the expertise, parts, and replacements required.
Selecting the right technology for your video wall can be daunting, but we&#;re here to help. We have the experience and expertise to help you choose the right technology, the right content management and processing solutions, and support you with warranty and services for the lifetime of your video wall.
Are you looking for more tips and advice for selecting video wall technology? Check out our tech brief, Discover the advantages of LED video walls.
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