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The large video screen technology

[su_row][/su_row] [su_row][su_column size=”1/2″]The SUPERVISION team is mobilised to explain the essential part of the large video screen technology and to provide you with a glossary including more detailed information about our screens.
[/su_column][su_column size=”1/2″]We expect all these insights combined will help you better understand the various technical terminologies and improve the management of your projects according to your expectations.
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giant-led-screen-assembly-pixel-matrix-module
[/su_row] [su_row][su_column size=”1/2″] A large video screen is made up of LEDs assembled together on matrices which are mounted on modules. In order to obtain a perfect video rendering, the joints between modules are not visible at all, regardless the viewing distance.[/su_column][su_column size=”1/2″] Robust and waterproof, our outdoor screens have been designed and tested to stand up to the severest environments : altitude, temperature differences …
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Types of large LED screens

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SMD LED screen

The SMD technology consists of packaging 3 color chips (red, green, blue) in 1 lamp.
Enhanced contrast levels and improved contrast/brightness ratio (especially in Full Black), greater color accuracy, outstanding resolutions are the salient features of the SMD technology which is used in most of our screens : LM11, LM15, LM17, LMB46, M5.8 …
Coupled with the CREE LED, the SMD technology has made of the brand new M5.8 one of the market’s top performing screens.

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DIP LED screen

Most DIP screens have a separate LED (R, G, B) for each of the three main colours: Red, Green, and Blue. But the disadvantage is the pixel diameter can’t be too small.

DIP LED technology is virtually no longer applied to the our screens nowadays.

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Pixel

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A pixel is the smallest element of an image.
Each pixel is made up of a cluster of LEDs : a red, a green and a blue.
The color of a pixel can be stored by using a combination of those LEDs.
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Pixel pitch

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The pixel pitch is the physical distance measured in mm from the center of one pixel to the center of the next – both vertically and horizontally.
It will determine the screen resolution.
Thus, the pixel pitch constitutes a primary criterion for selecting giant screens.

The lower the pitch, the higher the resolution.
And the higher the resolution, the lower may be the distance from the screen.

Generally speaking, the outdoor screens have a larger pixel pitch as the distance between the screen and the closest viewer is higher.

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Real vs virtual pixel pitch

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There are 2 types of components layout in a DIP LED configuration, thereby creating a « real » pixel pitch and a « virtual » pixel pitch.

■ Real pixel technology (1R1G1B – 1red, 1green and 1 blue LED) : each LED works independently.

■ Virtual pixel technology (2R,1G,1B – 2 reds, 1green and 1blue LED) and each LED is shared by the neighboring 4 pixels at the same time.

Virtual pixel pitch has consequently less LEDs / sqm. Image quality can be adversely affected : low brightness level, display flickering, and other troublesome visual effects.

The virtual pixel configuration remains mostly used with large, fixed installations such as our LM103. Mind that contents need to be adjusted using animated videos.

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A real pixel configuration definetely delivers the best display performance.
A virtual pixel configuration will offer cost benefits but will create an image that has compromised quality.
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Screen resolution

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The LED screen resolution refers to the number of pixels (or points), in other words, to the pixel density / sqm in the display area.
The increase of the resolution reduces the readibility distance* of a LED giant screen.
The combination of the following parameters « minimum distance**/ maximum distance*** – resolution » determines the appropriate screen size according to your configuration.

* Readibility distance: distance between the audience and the giant screen.
** Minimum distance : distance between the closest spectator and the giant screen.
*** Maximum distance : distance between the farthest spectator and the giant screen.

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What content can be broadcasted on a large screen ?

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You can launch any video contents in any formats on a giant screen.

Our screens are increasingly required to broadcast contents like Social Wall (Facebook, Instagram, Twitter…).
The image sources include direct TV, video recording on site, advertising spots but also any contents from a DVD, Blu-ray, PC, hard drive …

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What power supply is needed ?

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Giant screens consume 1 KVA (Kilo Voltampère) / sqm in average.

SUPERVISION leaves a sufficient margin in terms of power supply in order to cater for unforeseeable events and to avoid any voltage decreases.
You can consult the specific product literature summarizing all technical details.

Electrical power is supplied primarily by:
■ The connection to the mains
■ A power generator

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The electrical consumption increases with the screen size, its brightness… Hence, an outdoor screen will use more energy than an indoor.

Our mobile screens operate with 100% autonomy.
To that end, they are either fitted with an integrated power generator (LM11, LMC30, LMB46, LMC50) or are towed by a motor vehicle equipped with a generator. This feature allows them to function completely independently.

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