What is a Video Wall?
A video wall is a large display consisting of multiple screens tiled together to create a unified and seamless visual experience. And the video wall screen can display many picture or video or text from different input signals. It can display one whole picture or multi picture in a single screen. Video wall is widely used in monitoring room, news broadcast studios，traffic control rooms, shopping mall, conference rooms, and retail spaces. And there are 2 types of videowall solutions. These screens can be LCD (Liquid Crystal Display) video wall or LED (Light Emitting Diode)video wall panels.
Catagories: LCD videowall screen & LED Video Wall
LCD videowall system have many difference with led videowall system, major different from screen type, screen size, resolution, brightness,color,lifespan, and install method, and display signal process processor’s difference.
Screen type of video wall system:
LCD videowall screen display system is consist of multi LCD screens, the monitor screen is LCD panel, it is featured with high resolution, but also, easy to break characters. While LED videowall system is consist of many small pieces LED modules, and every manufacturer’s module size may differs .LED module is made of led diodes.
Screen size
LCD video wall system standard screen size including 46″ 49″ 55″ and 65″, and normally these size are fixed. The video wall is consist of multi of those size. But LED videowall screen size, as mentioned before, every manufacturer’s module size differs, it may 250*250, or 500*500 or 500*1000 or other size, depends on their designs.
Resolution
LCD Video wall system’s resolution is 1920×1080 or 4K resolution. and 1080P are most commonly used for indoor use. While LED video wall solution is depends on the LED module’s resolution, there are many types module solution like P1.953, P2, P2.5,P2.604,P2.976, P3.91 ,P4, P5, indoor led, and outdoor led like P2.5,P3,P3.076,P4,P5,P6,P10. LED splicing screen processors usually support higher resolutions because they are composed of multiple small LED modules, which can achieve an almost seamless splicing effect. However, LCD splicing screens usually have a certain physical border, and there will be a certain gap when splicing screen monitors together.
Brightness:
LCD videowall display mainly indoor, the brightness is 500nits, or 700nits . But LED videowall screens range from 800 nits to1000 nits, depends on indoor use or outdoor use. Outdoor led display requires a high brightness to have good visual experience under the sunshine,brightness may range from 4500 to 6500cd/m2. LED splicing screens can provide higher brightness and contrast, suitable for use in bright environments. LCD splicing screens have relatively low brightness and contrast, suitable for use in darker environments.
Color
LED splicing screen can provide brighter and richer colors because it is composed of red, green and blue primary color LED lights. LCD splicing screen color performance is relatively dim because it is composed of liquid crystal layer and backlight layer.
Lifespan
The lifespan of LED splicing screens is relatively short, usually around 50,000 hours. The lifespan of LCD splicing screens is longer, reaching more than 100,000 hours.
Install method
both types videowall display requires to have mounting bracket to install the screens. LCD video wall system brackets include wall-mount bracket, pop-up front maintenance bracket, cabinet type bracket and floor-stand bracket.
Processor for video wall
There are also some differences between LED video wall screen processors and LCD video wall screen processors in video signal processing, which are mainly reflected in signal input, processing capabilities and output. The following are their differences in video signal processing:
1. Signal input format:
-LED video wall screen processors usually support a variety of video signal inputs, including HDMI, DVI, VGA, SDI, CVBS, etc. They need to convert video signals of various formats into signal formats suitable for LED screens.
-LCD video wall screen processors also support a variety of video signal inputs, but due to the characteristics of the LCD screen itself, they usually do not need to perform complex signal conversion, but directly distribute the input signal to each LCD unit.
2. Signal processing capabilities:
-LED videowall screen processors need to have strong signal processing capabilities, because the LED screen is composed of a large number of LED lights, and each LED light needs to be precisely controlled. The processor needs to implement functions such as signal scaling, cropping, splicing, and color correction to ensure the display effect of the entire screen.
-Although LCD video wall screen processors also need to perform signal processing, due to the fixed pixels of the LCD screen, the processor’s task is relatively simple, mainly switching, distributing and synchronizing signals.
3. Signal output and screen control:
– The LED video wall screen processor needs to distribute the processed signal to each LED module and ensure the brightness and color consistency of the entire screen. This usually involves complex algorithms and calibration processes.
– The LCD videowall screen processor outputs the signal directly to each LCD unit. Since the LCD screen itself has a unified backlight system and color management, the processor does not need to consider the brightness and color consistency of the screen too much when outputting the signal.
4. Signal delay and synchronization:
– The LED video wall processor needs to minimize the delay of signal processing to ensure the smoothness and synchronization of video playback. This is especially important for large LED screens.
– The LCD video wall processor also has synchronization requirements, but since the response time of LCD screens is usually slower than that of LED screens, the requirements for synchronization may not be particularly strict in some applications.
5. Special functions of videowall processors:
– The LED video wall processor may also include some special functions, such as edge fusion technology, which is used to create smooth transitions between multiple LED screens to reduce the visibility of splicing lines.
– LCD video wall processors may include special display functions such as picture-in-picture and multi-screen splitting to display different content on multiple LCD screens at the same time.
In short, the main difference between LED splicing screen processors and LCD splicing screen processors in video signal processing lies in the conversion, distribution, synchronization and special effects processing of signals. LED processors require more complex processing capabilities to ensure the display effect of the entire LED screen, while LCD processors focus more on signal distribution and synchronization.
Different applications of LCD Video wall screen and LED video wall screens
LED video wall screens and LCD video wall screens differ in their application scenarios due to their respective technical characteristics. The following are their respective main application scenarios:
Application scenarios of LED screens:
1. Outdoor advertising: LED screens are often used in outdoor billboards, building exteriors, stadiums, transportation hubs and other places that need to be viewed from a distance due to their high brightness and good visibility.
2. Large-scale events: Such as concerts, sports events, exhibitions, etc., LED screens can provide a large-screen visual experience, suitable for large audiences.
3. Traffic instructions: Traffic information display screens in places such as highways and city squares, LED screens can clearly display real-time traffic information.
4. Stage rental: LED screens are often used in concerts, theaters, TV shows and other stage backgrounds and rental markets due to their modular design and flexibility.
Application scenarios of LCD screens:
1. Commercial displays: Such as retail stores, shopping malls, exhibitions, etc., LCD screens are often used to display product information, promotional activities and brand publicity.
2. Control rooms and command centers: LCD screens are used for monitoring video, data analysis and real-time information display, such as security monitoring, traffic command centers, etc.
3. Education and conference: LCD screens are used for demonstration and teaching in schools, corporate conference rooms, training centers and other places.
4. Home entertainment: LCD screens are the main type of home TVs and computer monitors, suitable for personal and family use.
In summary, LED screens are suitable for outdoor and large venues that require high brightness, large size and long-distance viewing, while LCD screens are more suitable for indoor displays and information display occasions that require higher resolution and color accuracy.
Video wall display system
To conclude, a full Video wall screen solution include:Input signal, Display LCD monitor screen,mounting brackets for LCD screens, signal processor /matrix and cables.
Input signal: Normally LCD monitor screens video wall support HDMI, DP, DVI, VGA input signals. video wall not only supports multiple signal inputs of a single type, but also supports multiple different types of input signals to be displayed on the video wall at the same time.
For example: For a 3×3 layout video wall display system, if the customer has 6 or 9 HDMI signals to display on the video wall, they can be displayed simultaneously through the signal processing equipment HDMI SPLITTER, HDMI matrix, or HDMI processor. What if there are 3 HDMI, 2 VGA, and 1 DP signals to be displayed on the video wall at the same time? At this time, the input signals include HDMI, VGA, DP and other types, which can also be displayed on the display system at the same time. It only needs to be displayed on the large screen through the processor. Therefore, LCD video wall has advantages when there are multiple types of input signals (that is, the signal sources that need to be displayed on the large screen).
LCD Monitor screens
The video wall screens here can be divided into different types according to size, resolution, brightness, joint bezel etc.
Video wall screen Size :Now leading video wall screen manufacturer ( Samsung, LG, Leyard and Planar etc ) screen size mainly 65″ 55″ 46″ 49″. The most used is 55” 49″ and clients tend to use larger size nowadays.
Resolution of LCD wall screens: 4K High-resolution LCD video wall (UHD), or 1920*1080P (FHD) resolution panels. 1080P resolution monitors are more popular.
Brightness of LCD video wall screens: only 2 types lcd video wall brightnes:500 nits brightness, 700nits brightness. The higher brightness, the cost higher.
Video wall screen joint bezel distance-This is a typical major factor in designing a video wall display system. Joint bezel means the gap between 2 screens when putting 2 LCD monitors together. Leading manufacturers’ screen joint bezel distance** 3.5mm, 1.7mm, 1.8mm, 0.88mm. The smaller the bezel, the better the visual effect , and for sure,the price higher.
Based on the above factors, different screen properties can be combined, which brings many possibilities to the video wall solution.
Mounting bracket
-There are many different types of brackets for splicing screens, which can be generally divided into ordinary wall-mounted brackets, front maintenance brackets, and floor-standing brackets，cabinet bracket.
wall-mount bracket:
Front maintenance pop-up bracket-Some suppliers also call it a hydraulic bracket. As the name suggests, it pops up after pressing the surface of LCD monitor. This bracket can be installed in a modular manner, which is easy to install and extremely convenient for future screen maintenance and repair without removing the screen
Floor stand-metal stand is fixed to the ground according to the project and it is locked
Cabinet bracket– Similar to a floor stand, it can be fixed on the wall or on the ground. The most notable feature is that there is a cabinet at the bottom for placing signal processing equipment, matrix processor, etc., hiding the equipment and creating a clean and tidy environment.
Signal processor equipment
3 major types: processor/matrix/ HDMI splitter.
HDMI Splitter: This is the lowest cost signal processing solution in the video wall solution. Its function is to distribute one HDMI input signal to multiple screens. Currently, some HDMI splitters have 1 HDMI Input signal to 4HDMI output, 1 HDMI Input signal to 8 HDMI output, 1 HDMI Input signal to 12 HDMI output signals, and 1 HDMI Input signal to 16 HDMI output. Its function is limited to stretching the signal into a whole display. The advantage is low cost and simple and easy operation. The disadvantage is that it cannot handle some complex display requirements, such as multi-screen overlay. Moreover, the HDMI splitter cannot handle the input signals of multiple splicing screens, such as DP and HDMI mixed signals. It only supports single signal type HDMI input.
Matrix
According to the input signal type, the matrix can be divided into HDMI matrix, DVI matrix, DP matrix, VGA matrix and mixed signal matrix (with two or more mixed signal inputs, such as 4 HDMI input signals, 5 DP input signals.). The price of different signal inputs is different. The functions that the matrix can achieve include:
1. Control the display position of the input signal on the VIDEO WALL through software,
2. Screen power on and off
3. Split screen display on a single screen
4. Single signal single screen display or the entire Video Wall display.
Proccessor ：Compared with the matrix, the processor is more complex and powerful in terms of both function and software settings. In addition to owning all the functions of the matrix, the processor can also achieve picture in picture, image overlay, image roaming, picture extend to full screen, etc. Moreover, the processor can support more mixed inputs and outputs.
cable connection-DS Tech We can also provide customers with the best screen connection solution, and display the entire videowall screen display solution at the lowest cost and most efficiently through different cables, signal processing equipment, etc.
