Do you often see large screens of moving and talking advertisements in shopping malls? Or were you shocked by the cool stage background at the concert? ​ ​Most of these LED displays that are eye-catching are born from a mysterious factory in southern China.​​. Today we will talk about where these black technology products that make the world's eyes shine.

1. Intelligent heart hidden in Shenzhen

Speaking of the location of the LED display factory, we have to draw the map south - 22°32' north latitude and 113°54' east longitude. This coordinate corresponds to the science and technology industry belt in Bao'an District, Shenzhen. Why are you all gathered here? Let me tell you, here is a radius of 20 kilometers and you can find all the chips, lamp beads, and power supply required for the display screen. It is fully equipped like a convenience store at your doorstep.

Last year, I visited an automation factory covering an area of over 10,000 square meters. Their production line is really eye-catching:

• The whole process of mechanical arm operation from lamp bead patch to module assembly
• Each screen must undergo 26 quality inspection processes
• Aging test room can simulate extreme climates from the Arctic to the equator

The most important thing is,​​These factories are just 40 minutes' drive from Shenzhen Airport​​, the screen produced in the morning can be "flying" abroad in the afternoon. Guess what? Now there are ten display screens in Southeast Asian shopping malls, and at least seven are labeled "MADE IN SHENZHEN".

2. The hard-core daily life of a technical home

Although the display screen is simple to light up, there are so many ways to go inside. Take the most common advertising screens for example. The outdoor use and indoor use are completely different things. I've seen a technician debugging a device, and the parameters are adjusted more refined than experimenting:

• The brightness of the outdoor screen must be adjusted to 4,000 nits, and you can still see clearly under the sun
• Instead, the indoor screen needs to be pressed to 1200 nits, so your eyes won't be tired after looking at it for a long time.
• The tiles on the stage can withstand the impact of hundreds of people dancing

I saw the staff changing the screen at Nanjing Metro Station, what a guy! ​ ​The curved screen with P0.9 pitch is installed like a Lego-pair clap.​​, It is said that the quick disassembly structure was used, saving half the time than the traditional method. The operation and maintenance guy told me: "The screen now comes with a physical examination function. Which lamp bead is going to retire? The background knows first before we do it. "

3. Customs clearance code for global projects

You may not imagine what kind of fairy orders our Chinese LED factories receive. Last year, the fence screen had to withstand the critical hits of football and protect against rain. The final delivery screen could work continuously in the heavy rain for 72 hours. There is also the transparent screen of the Internet celebrity shopping mall in Tokyo, with a transmissibility of 86%. From a distance, it looks no different from an ordinary glass window. When you get closer, you suddenly start playing advertisements.

What I admire most is the customized projects:

• A 20-meter curved screen made for Singapore shopping malls has a curve error of less than 0.5 mm
• The window screen made for Korean chain stores will still play smoothly in the middle of minus 15℃ in the middle of winter
• The floor tiles screen made for Southeast Asian casinos and high heels have no scratches after three years

4. Purchase skills that experts know

What is the easiest pitfall for beginners to take on LED screens? ​**​Only look at the price and not after-sales service~**! I know a bar owner who bought a miscellaneous screen with a cheap picture, but the screen flashed into a light ball on the day of opening. Later, I changed to the rental screen of a regular manufacturer, and the engineers were directly brought to the site for debugging.

Let me give you a few key points:
✓ The box should be made of magnesium-aluminum alloy, which is light and heat-dissipating
✓ The power supply depends on the conversion efficiency, and only 85% of the power can be saved
✓ It is best to choose a dual backup control system, and it can continue to broadcast after being interrupted.

By the way,​​Now all high-end screens come with smart dimming​​, can automatically adjust the brightness according to ambient light. Some data say that this can save 40% of the electricity bill in a year. Based on the power consumption of large screens in the mall, the money saved is enough to buy a few more screens.

If you want to talk about my experience over the years, the LED display industry really responds to the words——​​A layman watches the fun, while an expert watches the trick​​. Next time you see the cool large screen on the street, you might as well pay more attention to whether its color transition is natural and whether the splicing seams are misaligned. These details are the real standards for testing the strength of the factory. After all, in this era when pixels determine appearance, whoever masters core technology will hold the key to opening the vision of the future.

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