Friends who have just entered the industry always ask me: Where are the LED large screens that can be used for hundreds of thousands of yuan in the mall? Last year, I encountered a ridiculous thing when I helped people inspect goods - a screen marked "German technology" fell out of the container with a simplified Chinese quality inspection form. Today, let’s open this layer of window paper and talk about the ways in which LED screens were born.

1. The hometown of 70% of the world's LED screens is here

You may not believe it if you say it. Most of the LED screens we see every day come from the Pearl River Delta. Last month, I went to an industry exhibition and read through the information of twenty manufacturers and found a rule:

• ​​Shenzhen Bao'an​​: Ten booths and seven registered here
• ​​Dongguan Chang'an​: Module accessories wholesale distribution center
• ​​Huizhou Zhongkai​​: Packaging chip production base

Once I followed the logistics vehicle from Bao'an to Yantian Port, and saw eight LED factories 30 kilometers along the way. The driver joked that even a brick in this area could hit three screen factory technicians.

2. There is a quality password hidden in the workshop

A real good screen is not just a label, it depends on whether there are these hard configurations on the production line:

​​▎Full automatic patch workshop​​

• The robotic arm accuracy must reach 0.01mm (one seventh of the hair)
• The workshop must wear an anti-static bracelet before entering (I have seen those who wear slippers be stopped directly)
• Temperature and humidity control is stricter than ICU ward

Last year, I visited a 100,000-level dust-free workshop in a factory, and even mosquitoes couldn't fly in - I installed a four-layer air filtration system.

​​▎Aging test area​

• Run at full load for 72 hours continuously (temperature soars to 60℃)
• Each screen must undergo 20 power-off impact tests
• Waterproof test directly with high pressure water gun

The most ruthless quality inspection I have ever seen, soaking the screen in salt water and conducting electrical testing, which is said to simulate the corrosion rate of the seaside climate for ten years.

​​▎Packaging assembly line​

• Seismic resistance test free fall from a height of three meters
• Box gap fortress moisture-proof beads (Southern plum rainy season life-saving charm)
• At least three steel belts per wooden box

The whole goods were shipped to Russia, and it was frozen at minus 30 degrees Celsius for a week, and it was still lit normally without the box. Later I learned that the manufacturer specially added a low-temperature start module.

Three and three tricks to see through the real origin

Don’t believe in the “imported original” that salespersons brag. Learn these three tricks to ensure that you don’t fall for it:

​1. Check the screw holes​

• Metric thread (commonly used in China) vs. English thread (overseas equipment)
• Galvanized screws (resistant to rust) vs ordinary screws (prone to rust)
• See if there are any traces of secondary disassembly

​2. Touch the circuit board​

• Domestic boards like to use green solder resist paint
• Japanese accessories solder joints are conical
• European standard board must have CE steel printing

​3. Ask for parameter details​

• Real imported screen can report original chip batch number
• The protection level must be accurate to the decimal point (such as IP65.3)
• The specific heat dissipation solution is the thickness of the heat dissipation fin

Once I opened the "Made in the United States" screen and the Chinese "Inspector: Wang XX" was printed on the control card. This wave of operations really treats the buyer as a fool.

4. The invisible value behind the origin

Do you think buying a screen is done? These hidden benefits are also provided by good origin:

​​▎The technical master who responded 24 hours a day​

• The Pearl River Delta manufacturer arrived in two hours
• Foreign manufacturers may have to wait for three days
• Overseas brands can kill you by just the time difference

​​▎Spare parts guarantee in five years​​

• Local factory inventory modules are adjusted at any time
• The small workshop may even sell molds and scrap iron
• Imported accessories and other three months are normal

​​▎The firefighting team in an emergency​

• Shenzhen manufacturers can bring engineers directly into the computer room
• Some manufacturers do not even have permission to control software

Last year, a large screen of an e-commerce warehouse went down. The local factory arrived at 2 a.m. with a backup module, and it was forced to repair it before the morning courier went to work. This service is not something that overseas brands can provide.

Editor's opinion

To be honest, buying an LED screen now is similar to finding a partner - it’s useless to just look at your appearance, you have to find out your family’s background. I have seen the most conscientious manufacturer and dared to let customers broadcast the production process in the workshop. Not everyone has this confidence. The latest industry report shows that the five-year failure rate of screens produced in the Pearl River Delta is 12% lower than that of imported brands, and the maintenance cost is only one-third. Next time you want to buy a screen, you might as well ask if you can check the production ledger - manufacturers who dare to show their trump card will not have the quality accuracy!

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