Do you often see the promotional information screen at the entrance of a convenience store, or the real-time scrolling exchange rate board in the bank lobby? These "self-moving" LED full-color scrolling screens are now installed even in community supermarkets. But here comes the problem. The prices found on a certain product range from 3,000 to 300,000. How should a novice choose to avoid being disappointed? My cousin was cheated last year - the screen he bought for 20,000 yuan became stuck after two months of use. When it was repaired, he found out that it was a second-hand refurbished screen.

​​First figure out the type of scroll screen you want​​
Even though they are all called full-color scrolling screens, there are huge differences when broken down:

1. ​​indoor poster screen​ ​(Brightness of 800-1200cd/m² is enough, too bright will be dazzling)
2. ​​outdoor advertising screen​ ​(It must reach 4000cd/m², otherwise you will not be able to see clearly at noon)
3. ​​Special scene screen​ ​(For example, used by banks​ ​Anti-static screen​ ​, needed by the milk tea shop​ ​Waterproof fog screen​​）

A manufacturer that supplies chain stores in Southeast Asia told me that they installed​ ​Smart photosensitive screen​ ​It can automatically adjust the brightness according to the environment, directly saving 40% of the electricity bill - this function is now standard for mid-to-high-end screens.

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​​Purchasing channels hide great knowledge​​
There are three current mainstream purchasing methods:
① Find it directly​ ​Manufacturer​ ​(Suitable for those who want more than 5 yuan, you can get a discount of 15%-20%)
② local​ ​service provider​ ​(Add 25% but includes installation)
③ E-commerce platform (the riskiest, I have seen projects using off-the-shelf goods as new products)

Here comes the point:​ ​A video factory inspection is a must​ ​! For truly powerful manufacturers, fully automatic placement machines and high-temperature aging rooms are standard equipment in the workshop. I heard that there is a factory in Shenzhen with a monthly output of 10,000 square meters. Each screen must go through 72 hours of non-stop testing before leaving the factory.​ ​Red, green, blue and white four-color carousel test​ ​, this kind of insistence on quality is reliable.

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​​Question and answer: How to identify fake screens? ​ ​
Q: Merchants say they support product inspection, but where should I check specifically?
A: Teach you three killer moves:

1. Move your finger across the screen surface,​ ​1920Hz high refresh screen​ ​It shouldn’t be grainy
2. If you shoot in slow motion with your mobile phone, obvious scanning lines will appear on the copycat screen.
3. Ask to see​ ​CE certification number​ ​, the kind where you can check the authenticity on the official website

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​​After-sales service is the touchstone​​
The most outrageous case was that the screen was damaged by water and the merchant refused to insure it. Only later did I know that I had to take a look.​ ​IP65 protection certification​ ​. Reliable manufacturers will have​ ​24 hours video guidance​ ​, last time I heard that a shopping mall in Tokyo encountered technical problems when installing a screen, and engineers remotely debugged it in two hours at three o'clock in the morning - this kind of service is truly guaranteed.

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The editor thinks that buying an LED scroll screen is like buying an air conditioner. No matter how loud the advertisement sounds, you have to watch it​ ​Do you dare to give me a five-year warranty?​​、​​Can you come up with similar cases?​​、​​Is there 24/7 technical support?​ ​. The next time you encounter a merchant with a particularly low quotation, just ask him to bring up the real-time monitoring of the workshop - whether it is a mule or a horse, pull it out for a walk and you will know whether it is true or false.

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