Hey, you said that the LED large screen looks really good when it lights up, but where are the backend devices that control the picture hidden? Last month, I passed by the mall and saw workers tinkering behind the big screen while stepping on a ladder. I was curious to look over - good guy! It turns out that this thing is like a computer host, and it is not installed in a conspicuous place but wants to hide and seek. Today we will talk about this cold knowledge.

1. The backend system is a "brain", you have to find a safe house

To put it bluntly, the LED screen backend is the control center of the entire set of equipment. Just like your router cannot be placed next to the fish tank, you have to find one for this thing​Dust, waterproof, and hand-proof​ place. A common operation is to stuff a special metal control cabinet, no more than 20 meters away from the screen.

Do you know? Last year, the transparent screen of a South Korean commercial body suddenly turned black. After checking for a long time, it was found that the cleaner used the control box as a tool box! So now, professional installations will put warning signs on the control cabinet and fingerprint locks are installed.

2. Different hiding techniques are very different in different scenarios

​​1. Outdoor advertising screen: Playing tunnel battles​
To dig a "bunker" in the steel frame structure, three hard indicators must be met:

• ​​Lightning protection grounding wire​Install three days earlier than the screen
• Box​Heat dissipation hole​Drag downwards (default rainwater backflow)
• Reservation​Instrument port​Can allow adults to get in

On a typhoon day, a large screen in a pedestrian street in Shenzhen could work normally after two hours of soaking in water, all thanks to this "bunker" design.

​2. Stage floor tiles screen: fighting guerrilla warfare​
The most fear of equipment being stepped on when performing temporary shows. Experts will scatter the controllers inStage keel interlayer​, each control box tube has a 2x2m area. There is an advantage to doing this - if there is any problem in the area, you can repair it by lifting the floor, and it will not affect the overall performance.

​3. Shopping mall window screen: Play invisibility​
Have you ever seen a decorative column that makes a control box? This is what a luxury store in Shanghai does, with the control cabinet covered with rhinestones, which is both beautiful and anti-theft. What's even more amazing is that they use​Fiber+wireless​Double backup, even if the naughty kid pulls the wire, you won’t be afraid.

3. Hiding well can save a lot of money

Let me tell you a real case: the fenced screen of a stadium in Tokyo hides the control room under the auditorium. After five years,​Repair fees save 60% compared to similar projects​​. Why? Because the sun and rain are avoided, the life of components will be doubled.

There is a calculation formula here that is quite interesting:​Ideal installation distance = screen length × 0.2+3 meters​. For example, for a 10-meter-long screen, the control box is best hidden from 10×0.2+3=5 meters away. This distance not only ensures the signal stability, but also facilitates daily maintenance.

4. Three major pitfalls that novices often step on

1. ​Use the controller as a fan heater​
   There was a gym that insisted on installing a control cabinet in the locker room, but the steam soaked the circuit board into a "seafood market". Remember, leave it around the control box30cm heat dissipation space​, industrial air conditioners must be installed if the temperature exceeds 40℃.

2. ​​The wires go into spider webs​
   The most outrageous installation I have ever seen, the control box pulled a 200-meter line to the screen! The signal attenuation was so bad that my mother didn't recognize him. Professional practice is to add one every 50 metersSignal amplifier​, it’s like telling the courier: "You are tired of running this road, so change your relay."

3. ​Forgot to leave the maintenance port​
   After installing the screen in a certain exhibition center, I found that the ceiling must be removed to repair it! Now the industry standard is to leave every 10 square meters​60×60cm maintenance port​, the position must also be avoided from the load-bearing structure.

5. Future trends: The hid the backend, the smarter it is

Now some high-end projects have begun to play "distributed control" and dismantle the brain into several cerebellums. For example, a spherical screen in Dubai, 256 control modules are hidden in the gaps of the steel frame. Which one is broken and which one is replaced by the traditional solution​​Save 30% of electricity​。

What's even more exaggerated is that the control box with self-test function can predict faults 7 days in advance. It’s like installing a private doctor on your device, and coughing twice reminds you that it’s time to take medicine.

I have to say that this backstage device is like a paranormal in martial arts novels. The deeper you hide, the better your skills will be. Next time I see the cool LED screen, maybe guess where its "brain" is hidden - maybe it's right under your feet!

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