Do you often see those large luminous screens that can perform magic in shopping malls and subway stations? I'm itching to know where these high-tech gadgets come from? Today we will become "display detectives" and take a look at the ins and outs of these colorful light-emitting panels. To be honest, finding this thing is much harder than finding a partner - you have to understand the market, know the ropes, and you have to be careful not to be fooled!

Exploring the Three Golden Channels

If you want to get a reliable full-color LED screen, you should look for these three ways:

​​1. Industrial Belt Express​​
80% of the country’s best screens are concentrated in the Pearl River Delta and Yangtze River Delta. There is an industrial park in Shenzhen that houses an automated factory with a monthly output of 10,000 square meters. The assembly line is assembled by robotic arms. The scene is more exciting than a science fiction movie. Focus on​ ​National high-tech enterprise​ ​Brand, this type of manufacturer usually dares you to make a video inspection of the factory.

​​2. Industry exhibition gold rush​​
The LED exhibitions in Beijing and Guangzhou are gathering places for experts. At last year's exhibition, there was a transparent screen with a transmittance rate of 86%. Passersby thought the glass was made of spirit. Remember to bring a brightness tester to expose those exhibitors who falsely mark parameters on site.

​​3. The secret doorway of the Foreign Trade Terminal​​
Export-quality goods are often piled in bonded warehouses. A certain manufacturer shipped 87% of its goods to Japan and South Korea, but the warehouse manager let slip that the export final order required three more procedures than the quality inspection of domestic sales. However, for this kind of channel, you must look for CE and CCC certification, and don’t be greedy for cheap.

Four principles to avoid stepping into pitfalls

Teach you a few tricks to distinguish between a real boss and a leather bag company:

​​See the production workshop​​
• The dust-free workshop is a basic operation. The reflection on the ground can be seen in the mirror.
• The quality inspection equipment is more complete than the school laboratory
• I heard that some manufacturers even have to pass three inspections on their screws.

​​See technical parameters​​

• ​​refresh rate​ ​: Anything above 1920Hz is expired.
• ​​Brightness adjustment​ ​: If the outdoor screen is lower than 4000cd/m², you will be blind.
• ​​Protection level​ ​: IP65 is the bottom line of the industry. Those who dare to get wet in heavy rain are real men.

​​See actual case shooting​​
Don’t believe the renderings! For live video verification:
• Is there any halo when taking pictures of the screen at night?
• Is there any smear when playing fast ball game videos?
• The picture taken on a cloudy day is not clear

​​See service outlets​​
24-hour response is no joke. Some companies have service points in 110 countries. The last time there was a strike in the middle of the night for the large screens in Singapore's shopping malls, engineers arrived with spare parts in three hours, which was even more punctual than takeout.

Question and answer time

​​Q: Is it reliable to buy online? ​ ​
A: It depends on the situation! The basic models sold in Dongdong’s self-operated store are okay, but the high-end customized screens must be inspected offline. The most outrageous case I have ever seen was that an online shopping screen was claimed to be waterproof outdoors, but it turned out that water vapor entered the day after it was installed. When I took it apart, I saw that the sealing strips were all double-sided tape.

​​Q: Can I buy second-hand screens? ​ ​
A: A field that only experts dare to touch! Teach you how to age when looking at screens:

1. Check the production date of the control card (hidden in the system menu)
2. Check the oxidation degree of the power cord interface
3. Measure the maximum brightness attenuation value, if it exceeds 20%, pass directly

​​Q: How to find suppliers in small counties? ​ ​
A: The "cloud factory inspection" model is now popular, and some manufacturers can conduct live broadcasts to inspect the production line. Focus on their logistics capabilities. Some companies in county-level cities can deliver goods within 48 hours, and the installation masters take the high-speed train to your door with tool kits.

Editor's opinion

After ten years in this industry, the biggest lesson learned is——​ ​Good screens all have "obsessive-compulsive disorder about details""​ ​. For example, for real military-grade products, even the direction of the screw lines must be unified. ； The packaging wooden box of the high-end customized screen can be used directly as furniture. Next time you see a cool big screen on the street, you might as well take a closer look at the arrangement density of pixels and touch the heat dissipation hole design of the frame. You might be able to guess which god's handiwork it is. These days, buying an LED screen is like looking for a partner. Glossy appearance doesn't count, the key is to look at the inner "hard core strength"!

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