The cool advertising screens I see every day when I pass by the mall, the information wall updated in the subway station, and the shocking stage background at the concert scene - where is the "mysterious computer" behind these LED screens hidden? Could it be that it really disappeared like magic? Today, let’s break this layer of window paper and let you see the tricks in the industry!

1. Three major stealth techniques to control computers

​More than 90% of LED large screens adopt these three deployment solutions​：

1. ​​Cabinet Secret Room​: Set up a dustproof cabinet 1.5 meters behind the screen, and the temperature should be controlled at 22℃±3℃
2. ​Remote control​: Place the host in the monitoring room a hundred meters away and transmit signals through optical fiber
3. ​Module integration​: The latest box is built-in microcomputer, with a thickness of no more than 10cm

Last year, a music festival made a joke - the staff put the computer under the stage, but the subwoofer made the system crash and the whole audience blacked for 5 minutes. So,​The wrong position is really fatal​！

Golden distance formula for different scenarios

There is a cold knowledge: if you support a large screen with a refresh rate of 1920Hz, the transmission distance exceeds 30 meters, you must use a photoelectric converter, otherwise there will be a shadow visible to the naked eye!

These details determine success or failure

​​Three hidden points that veteran drivers understand​：

1. The cooling air outlet should avoid the screen cooling channel, preferably convection
2. Ground wiring should be treated with rat prevention, and backup lines should be prepared before important activities
3. Wireless control must be prepared at least for dual-band redundancy, and 5G signal wall-through capability is poor

To give a real case: A brand installed a computer under the air conditioner outlet at the press conference, and the condensate water poured back into the motherboard, causing heavy losses.​​Environmental adaptability is more important than configuration​！

Soul-questioning session

​​Q: How high is the computer configuration sufficient?​​
A: Look at the resolution! The 4K screen has at least i5+GTX1660, and the 8K screen has RTX3080. But note:
→ Don't use gaming graphics cards, professional graphics cards have 3 times more stable
→ The memory must be dual channels, 32GB is standard
→ Solid-state drives must have power-off protection function

​​Q: How to switch quickly when encountering an emergency?​​
A: Smart people have prepared two plans:
① Main control computer + backup computer real-time hot backup
② Dual links for cloud control and local control
③ The USB flash drive direct plug function can save the scene at critical moments

Last year, a power outage occurred in a stadium in Tokyo, and the backup system was switched in 28 seconds. The audience did not notice any abnormalities. This is the value of the professional solution!

Editor's opinion

I have to say that the most fun thing in the industry now are those manufacturers that directly integrate control modules into screen boxes. Just like the latest rental screen, you can see a miniature host with waterproof treatment by removing the cover of the box. This design is much more stable than an external computer. Remember to ask clearly when purchasing next time: Can you achieve "screen and machine integration"? Is there a power-off function? After all,​Good designs are hidden in invisible places​, do you think this is the reason?

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