Hey, you said that there are LED advertising screens all over the streets now. Why are some of them as bright as a small sun, and some of them look like they have cataracts? Last month, I helped Lao Zhang repair the screen in their shopping mall. My dear, when I took it apart, I saw that the wiring was messy like a spider web. Is there something wrong with this? Today we will talk about what kind of LED advertising screen is really reliable.

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​​Three elements of a good screen are indispensable​​
First look​ ​Is the refresh rate fast enough?​ ​. Hold your phone up to the screen and take pictures. If water ripples appear, pass quickly - this live broadcast can make you lose followers and cry. Nowadays, 1920Hz is considered a passing standard. Last year, when the county theater held a party, the rented screen was only 1440Hz. When the actors danced, shadows were all over the screen, and the director was so angry that he threw the walkie-talkie on the spot.

Second place​ ​Brightness does its own magic​ ​. It has to reach 5,000 nits in the sun during the day, and automatically drops to 800 nits at night without dazzling the eyes. I have seen convenience stores install fixed-brightness screens, which were as bright as searchlights in the middle of the night. In the end, they had to use newspapers to make ends meet.

The third important thing​ ​Can withstand the torment​ ​. Remember to choose IP65 protection for seaside shops. During the typhoon last year, all the screens in a street were destroyed. Only one that used waterproof strips + stainless steel casing survived. Guess what? During the quality inspection, the manufacturer actually held the high-pressure water cannon for half an hour.

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​​Hidden details​​
• Bank cards cannot be inserted into the seams of the box - the accuracy must be controlled within 0.1mm
• The power cord is equipped with flame retardant material as standard, which will extinguish itself when encountering an open flame.
• The signal interface must have a self-locking buckle that will not loosen after being removed and plugged in 500 times.
Let me tell you a true story: The screen of the pedestrian street milk tea shop kept flickering, and it took me three months to find out that the interface was oxidized. Nowadays, good manufacturers have gold-plated interfaces and equipped with dust-proof plugs. If a salesperson tells you, "Just wipe the socket," immediately tell him to stay where it's cool.

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​​After-sales service is the touchstone​​
The screen went black on the eve of the mall's opening last month, and technicians from the manufacturer climbed over the wall at two o'clock with spare modules to repair it (the front door was locked). Now I do everything that is reliable​ ​24 hours response​ ​, the remote guidance can be accurate to "the second screw of the third module from the left". Those who tell you to "find a real estate electrician" are probably second-rate dealers.

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​​Teach you three ways to check authenticity​​

1. Touch the heat dissipation holes with your hands - it will feel warm after two hours of power on. If it feels hot, turn off the power immediately.
2. Look at the debugging interface - with​ ​Brightness curve automatic calibration​ ​High-end products are functional
3. Photos of the installation site are required - those who do not have a fully automatic placement machine in the workshop will be directly blocked.
   A friend who works at weddings is even better. He brought his own USB flash drive to test the machine, which contained 256-level grayscale test images. A good screen can clearly see the 8th level, but a bad screen will be blurry at the 5th level.

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To be honest, even fish sellers in wet markets now use electronic price tags. But if you find an "all-round decoration team" on the street to install the screen, it will be like a long-lived person eating arsenic - too long to live. Remember, a good screen = hard technology + meticulous attention to detail + a dedicated after-sales team on call. If you put these three together, you are guaranteed to become the most beautiful guy in the entire GAI!

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