Did you know? A shopping mall in Shanghai installed a three-layer LED large screen last year, but 12 modules were burned out in half a year. This thing makes many bosses who want to install multi-layer screens scratch their heads - where can I buy this thing reliably?

▎​​Why are multi-layer screens three times more expensive than single-layer screens? ​ ​

1. ​​Complex heat dissipation structure​ ​: Each layer must have independent air ducts to dissipate heat layer by layer like a toaster.
2. ​​Signal synchronization requirements are high​ ​: The picture delay of the five-layer screen must be ≤0.3ms
3. ​​The load-bearing capacity must meet the standard​ ​: Each square meter must bear a weight of 200kg

Last year, the three-layer interactive screen installed in a shopping mall in Tokyo underwent 28 light structure tests. In the end, aviation aluminum was used to complete it. This kind of technical work is not something that a small workshop can do.

▎​​Three tips to avoid pitfalls when purchasing​​
→​​See the workshop​ ​: Only manufacturers that dare to let you watch videos on the assembly line are reliable.
→​​Measurement parameters​ ​: Focus on the refresh rate (≥1920Hz) and brightness adjustment range (from 800 indoors)
→​​Check certification​ ​: ISO9001 and CE certification are the minimum thresholds

There was an old nightclub owner who was looking for a bargain and bought a five-layer screen to put in the DJ booth. As a result, the whole place flickered as soon as the lights were turned on. Later, it was discovered that the driving power supply was not electromagnetic shielded. This is a low-level mistake that regular manufacturers would never make.

▎​​What details should be paid attention to during installation? ​ ​

1. ​​The distance between layers should not be less than 15cm​ ​(Otherwise there will be problems with heat dissipation)
2. ​​Independent power supply for each floor​ ​(Prevent the entire screen from being paralyzed)
3. ​​Regular dust removal and maintenance​ ​(Dust accumulation exceeding 2mm will affect heat dissipation)

Last month, I helped install a four-layer window screen for a brand store in Seoul, and specially added an intelligent dust removal system. Using a camera to monitor dust thickness and automatically remind you to clean, this thoughtful design is becoming more and more popular.

The editor finally tells the truth: when buying a multi-layer screen, don’t just look at the quotation, but also check whether the manufacturer has done similar projects. It is best to choose a factory with a monthly output of more than 10,000 square meters. A company of this size has to have dozens of quality inspectors, so the quality is naturally guaranteed. By the way, I heard that multi-layer screens now exported to Japan must pass JQA certification. If you can get this standard, you can make the right choice with your eyes closed.

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