Recently I discovered an interesting phenomenon: many friends who have just entered the industry are studying "how newbies can quickly increase their fans", but they know nothing about the LED displays that are eating. Last month, I helped someone deal with a bad thing: an event company bought three-no products with greed for cheapness, but the screen at the event suddenly blackened and the six-digit number was directly lost! Today we will talk about this seemingly simple and actually many purchasing issues.

1. Select screens to avoid pits and three major mine areas

Let me tell you a real case first. A friend spent 30,000 yuan to buy a "high-end screen" in the wholesale market. The brightness is less than 800cd/m², and it is impossible to see clearly in broad daylight. Three most common pitfalls when buying a regular screen:

• ​​Brightness imaginary​: The indoor screen is marked with 2000cd/m², but it is actually less than 1200.
• ​​Protective fraud​: It is known as IP65 waterproof, but it will be short-circuit when it rains lightly
• ​​After-sales shirk​: If something goes wrong, no one can be found, the repair quotation is more expensive than the new machine

Here I will teach you a stupid way - bring a luminance meter to take a live test! Qualified products are​Indoor 800-1200cd/m²​​This area, at least outdoors​4000cd/m² up​. There is a boss who is even more amazing. He just takes his phone to slow motion to shoot the screen.​Refresh rate is lower than 1920Hz​The original shape immediately appeared, and the picture was full of ripples.

2. Hard core parameter comparison table

When choosing a screen, don’t just listen to sales bragging. These parameters must be determined by:

1. ​Pixel spacing​: It’s not that the smaller the better. There is no difference between P4 and P6 when looking at the 3-meter appearance.
2. ​​Grayscale​: Starting at 16 bits, otherwise there will be faults in gradient colors
3. ​​Dead light rate​: Within three-tenths, you can see if you take the solid color picture and test it

There is a cold knowledge: a real good screen​The shutdown state is light gray​, if it is pure black, it will definitely cut corners. Let me reveal another industry insider - look at the power cord!​​National standard 3×2.5mm² wire diameter​It is the bottom line. If you encounter a 1.5mm², you can pass it directly.

3. Revealing the Procurement Channel

Now there are many online and offline channels, how can you choose to be reliable? Let me tell you my personal experience: I helped the gym choose screens last year. After comparing six of them, I found out that​There are suppliers who have built their own factories​​The quote is actually 20% lower than that of the middleman. Focus on these points:

• ​Test report​: The actual brightness and color temperature measurement data of the CMA chapter should be included
• ​Production cycle​: The regular P3 screen is delivered within 7 days.
• ​​Installation Cases​: Don’t believe in the renderings, just take live videos

The most amazing thing is that there is a supplier who took the initiative to invite me to them10000㎡ automation workshop​ Visit and watch the screen with your own eyes for a 48-hour aging test. Not everyone has this confidence.

4. Soul interrogation time

Q: How to determine whether it is a refurbished screen?
A: Focus on​Interface wearand​Border scratches​, the snaps on the new screen are even more neat than that of the Virgo. Let me teach you another trick - check the serial number! Regular manufacturers can provide​Factory record within three years​​。

Q: What is the difference between a rental screen and a project screen?
A：​​Lease box​It is necessary to have a quick disassembly structure, and the aluminum-magnesium alloy frame can be disassembled and assembled in 15 minutes. A performance company boss said he was hiding, and they used engineering screens for rental, but they repaired the connector three times in two months.

Q: How to implement after-sales guarantee?
A: The contract must state4-hour response, 24-hour home visit​, it's better to see theirs for yourself24-hour technical center​. I heard that there was a tough guy, and the engineer brought a spare module to the door and replaced the failed unit instantly on site.

Once when I was chatting with the master, he told the truth: "Buying a screen means buying a service system." The most professional supplier I have ever met, and I have taken it with me during the design stage of the project​Spectroscopy analyzer​​To measure ambient light, even the power supply phase must be adjusted three times during installation. Now I finally understand why all major projects are designated​Full process control​​Manufacturers—The hidden costs saved are much more than the difference.

After all, buying a regular LED screen is like finding a partner. You can’t just look at the external parameters. The key is to examine your inner strength. Next time, if you encounter a salesperson who is full of scent, remember to give him three questions: "Can you measure the brightness on site?" "Do you dare to sign a compensation agreement for dead lights?" "Can you go to the factory to inspect goods now?" These three questions can screen out 80% of unreliable suppliers.

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