When you stare at the colorful advertising screen in the mall, have you ever thought about what corner of this thing was made from? The display screen marked "German Technology" on Taobao, but the shipping location shows Shenzhen Huaqiangbei; the "original Japanese" sold at the exhibition, unpacked the packaging and found that the power cord said Made in China... Today we will break it and talk,​The origin of LED display screens​, teach you how to see through the quality from the source of production.

1. Global industrial map

Let me talk about cold knowledge first: 7 yuan is labeled as "Made in China" for every 10 LED screens in the world. But there are still different levels of these 7 blocks:

• ​​Pearl River Delta Cluster​: The 50-kilometer industrial belt from Shenzhen Bao'an to Dongguan Chang'an gathers the world's most complete display industry chain. In a certain Wanping Automation Factory, a robot can assemble a box in 20 seconds.
• ​​The Yangtze River Delta Technical School​: Suzhou, Xi and Chang area specializes in the research and development of control systems. Smart modules that can automatically adjust brightness are mostly accompanied by the "technical genes" here.
• ​New forces in Southeast Asia​: Many assembly factories have emerged in Vietnam and Malaysia in the past two years, but the core driver ICs and lamp beads have to be imported from China.

The fence screen used in an international event last year was very interesting: the box was made in Shenzhen, the control system came from Suzhou, and was finally assembled in Vietnam. As a result, there was a color difference problem on the spot, and the technical team flew three times before they could get it done. So say​The origin tag is a word game, the key depends on where the technology comes from​。

2. The mirror on the production line

Teach you three ways to see the fog of bankruptcy:

1. ​Touch the heat sink temperature​: After two hours of running the good display, the heat sink temperature will not exceed 60℃. I have seen a small factory product that can fry eggs in half an hour after starting the machine. This product is used for half a year and is accurately burned.
2. ​​Look at the details of the cable​​: The gold-plated thickness of the aviation plug is ≥3μm to be considered qualified. Some manufacturers use iron sheets to plating copper, but they have poor contact after inserting and unplugging twenty times.
3. ​Check the arrangement of lamp beads​: Take a photo with a macro lens of your mobile phone. The authentic San'an Optoelectronics lamp beads are arranged like a military parade array, and the counterfeit goods are twisted and twisted like drunkenness.

To give a real case: A transparent screen "German Craft" bought by an internet celebrity restaurant showed light spots after using it for three months. When I opened it, I found that the lamp beads were a copycat from a small workshop in Shenzhen, and the control system was still the version from five years ago. So say​Don’t be superstitious about the label of origin, the key is to look at the production standards​。

3. Comparison of performance in global origin

The most realistic way to talk with data:

Pay attention to this detail:​The box accuracy is 0.1mm, and there will be gaps visible to the naked eye when splicing​​. This is why high-end commercial screens would rather spend 30% more than choose the Pearl River Delta production.

4. Soul interrogation session

​​Q: It is said that domestic screens are of poor quality, is it true?​​
A: This is true ten years ago, but now the high-end screens produced by major Shenzhen factories are awesome to the international brands. A P1.2 micro-pitch screen used in a Marina Bay landmark project has not been replaced in a module for three consecutive years.

​​Q: How to determine whether it is an OEM product?​​
A: Check the customs declaration form! Original production has at least the import customs declaration certificate for driver IC and lamp beads, and only the customs declaration record for the OEM products is

​​Q: Imported screens must be better?​​
A: Wake up! The circular screen used by a European luxury brand is actually labeled by Shenzhen OEM, and the price has tripled.

Editor's opinion

After struggling in the industry for more than ten years, I have said something offensive:​Buying an LED screen is like buying seafood. The key is to see "Shui Pier"​. Next time you purchase, don’t just look at the brochure and go directly to the factory workshop - see if there is a constant temperature aging workshop (this thing cannot be built at all in a small factory), touch the seams of the box just coming off the production line (the accuracy is enough to clip A4 paper), and it is best to randomly draw a module and continuously grill for 72 hours (there is no dead light to be considered passing). Remember, the quality of manufacturers who dare to let you visit the production line casually is definitely not much worse!

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