Hey, friends have been asking me about this recently. You said that the streets are now full of LED screens, and there are shiny displays hanging in shopping malls, on the side of the road, and even at the entrance of the vegetable market. But why do some people get fined after pretending? Some display screen is damaged after half a year? There are so many ways to go here...

​​Let’s talk about the common pitfalls first.​​
I heard a true story last month - the owner of a hot pot restaurant was greedy for cheap and spent 80,000 yuan to install an outdoor screen. As a result, when the rainy season came, the screen started to smoke. Later I learned that the protection level of the screen was not enough at all, not even IP54. So,​ ​When looking at parameters, you can’t just look at brightness and size. Waterproof and dustproof indicators are the lifeblood.​​。

​​To find the screen, you have to look at the application scenario.​​

1. If you are installing the exterior wall of a commercial complex, you must choose one that can reach a brightness of over 5000cd/m² and have an intelligent dimming function (it must be visible even under the sun at noon).
2. For stage performances, the refresh rate must be 1920Hz, otherwise the camera will be full of water ripples.
3. The kind used in stadiums must be able to withstand the vibration of the audience's stamping feet, and the box joint error cannot exceed 0.1mm.
   Suddenly I remembered that the fence screen used in an international sports event last year was said to be able to withstand level 9 winds. Not just any company can make this kind of special screen.

​​Procurement channels are very deep​​
The market is now very chaotic, with prices ranging from 30,000 to 300,000 for the same size. Teach you three ways to distinguish authenticity:

• Touch the heat dissipation holes: Made by a serious manufacturer, the metal frame is not hot to the touch for ten minutes.
• Look at the debugging interface: the professional-level control system has multi-language options in Chinese, English, Japanese and Korean
• Ask about the warranty terms: Those who dare to promise door-to-door maintenance for three years are the hard ones.
  A customer complained to me that he bought a "foreign trade single screen" on an e-commerce platform, but even the driver chip turned out to be second-hand. This kind of loss is enough to suffer once.

​​Question and answer time​​
Q: Why do some screens look white during the day?
A: It depends on the grayscale. The real good screen is under the strong light at noon.​ ​Low brightness and high gray technology​ ​It can make the picture have clear layers, and products like those that intelligently adjust the brightness of 800-1200cd/m² will not blur into one piece.

Q: How to judge the strength of a manufacturer?
Let me teach you a tough trick - it depends on whether they dare to let you see the production line. For a truly confident company, the fully automatic placement machines in the workshop are running smoothly, and the quality inspection process is stricter than the college entrance examination invigilator. I heard that there is a Shenzhen company whose monthly production capacity exceeds 10,000 square meters, and the whole process of quality inspection has to pass 27 levels. Only the goods coming out of this kind of factory are reliable.

​​Special reminder​​
Many projects now require displays with interactive functions. For example, transparent window screens in shopping malls,​ ​Transparency 86%​ ​It is the threshold of the industry and can display advertisements without blocking the view inside the store. There is also a front desk service screen that must support touch + voice dual operations. These are not something that a small workshop can handle.

Editor's opinion: Looking for a large LED screen is like looking for a partner. You will suffer a big loss just by looking at the appearance. You have to look at the parameters to see the kernel, and ask about the details for guarantees. Remember, reliable suppliers will help you avoid risks from the beginning of solution design. Those who only say "absolutely no problem" will probably go wrong.

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