Have you encountered this situation? My friend's milk tea shop opened just installed an LED screen on the door, but after half a year of use, the color blocks broke out, and the repair fee was even more expensive than buying the screen. In this case, it is probably because you chose the wrong manufacturer. Then the question is - where should we find reliable ones in so many LED display factories across the country? Today we broke it apart and broke it and talked about it.

​​Industry Map: Golden Corridor Connected with Lights​​
The 120 kilometers from Shenzhen to Dongguan gathers 62% of the country's LED display production capacity. Here is a cold knowledge: More than 70% of the LED screens you see on the commercial street every day come from this area. Why are they all gathered here? To put it bluntly, the industrial chain is complete - from chip packaging to driver IC, you can find all the accessories in half an hour of driving.

For example, the production base of a large South China factory is as big as a football field. Other people’s assembly line, from patch to aging tests, the monthly production capacity easily exceeds 10,000 square meters. The advantage of this scale effect is that the P3 screen with the same configuration can be about 18% cheaper than that of other factories.

​​The tips for choosing a factory: three visible standards​
Newbie Xiaobai chooses factories and remembers these three iron laws:

1. ​​View the equipment list​​: There must be an SMT patch machine + vacuum reflow soldering machine, which is the entry-level equipment for display screens
2. ​​Touch the sample section​: The circuit board thickness of high-quality modules is ≥2.0mm, and inferior products are usually only 1.6mm.
3. ​Check the workshop humidity​: The humidity of the patch workshop in regular factories is controlled at 45%±5% year-on-year

A restaurant owner complained to me that he had found a small workshop before, but the control card was burned after the screen was filled with water. Later, I changed my factory with an IP65 laboratory and soaked in water for testing. The screen was fine for 72 hours.

​​Technical Secret Battle: The Doors Hidden in Parameters​
Now the display parameters are always "high refresh rate". Here we teach you how to read the real kung fu:

• ​​True 1920Hz refresh rate​​: Use slow motion mode of the phone to shoot the screen, and the black scanning line should not appear on the screen.
• ​​Effective protection level​: Splash mineral water onto the screen at work, and the water droplets should roll down in the lotus leaf effect
• ​​Intelligent brightness adjustment​: When the sun shines directly at 12 noon, the screen content should be clearly visible and not reflective

The purchasing director of a supermarket chain revealed to me that they now specialize in choosing factories with optical laboratories. This type of manufacturer can do spectral analysis to ensure that the color deviation value of each screen is ≤0.003, and even if a chain store installs ten screens, it will not be excellent.

​Service Trap: The easiest pit for beginners​
Be sure to confirm these four points before signing the contract:

1. Are 3D modeling pre-installed services provided? (Can avoid on-site cutting and damage to the screen)
2. Is the control system open to the protocol? (Convenient to access intelligent central control in the later stage)
3. Is there a local spare parts library? (Emergency repairs do not require waiting for express delivery)
4. Do you dare to sign a brightness decay contract? (The annual decay of high-quality screens should be ≤5%)

I heard that a factory has no spare parts library and the customer waited for two weeks for the screen to break down, which directly caused the store to lose more than 200,000 yuan. Nowadays, those who know how to buy are required to read the manufacturer's "Spare Parts Reserve List", and the inventory of core driver ICs must reach at least 15% of the installed capacity.

​​Field Test Factory: Five Must-see details​

1. Randomly select block screen in the aging workshop, play it continuously for 72 hours to see if there are any dead lights.
2. Let technicians demonstrate the module replacement on-site, and high-quality products can be replaced in a single block within 3 minutes.
3. Check the anti-collision angle of the packaging box, regular manufacturers use EPP foam material
4. Observe whether the quality inspector is using a magnifying glass to check the solder joints
5. Look at the warehouse shipping area. Normal factories should have logistics vehicles queued up every day.

An old man who is doing stage rental told me that he would first check whether the toilet is clean when choosing a factory. A factory that cannot even take care of the toilet is good, so quality control will definitely not be much better. The words are rough but the truth is not rough. This trick really helped him avoid the pit twice.

At the end of the day, let me reveal the inside story of the industry: If a truly powerful manufacturer, the first question for the order acceptor is "What is the altitude of your installation environment?" Because the heat dissipation design needs to be recalculated at a height of more than 2,000 meters. Those who quote without asking about the use environment are 80% of the second-dea dealers. Next time I go to the factory for inspection, remember to bring a USB flash drive to store the 4K test film source, and the live broadcast of the red gradient screen - it is basically impossible to be wrong if you can hold this test.

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