Friends who have just entered the industry must have encountered this kind of confusion: Search "LED monochrome screen purchase" online, and hundreds of manufacturers will pop up saying that their quality is good, and the prices range from 800 to 3,000 per square meter. Who should you trust? Last year, a supermarket owner bought a low-priced screen at a bargain price. However, it started to flicker after half a year, and the maintenance fee was more expensive than the screen. Let’s chat today​ ​How to buy LED monochrome screen​​。

​​Understand the core parameters first​​
Don’t be fooled by merchants! These parameters must be asked clearly:

1. ​​Pixel pitch​ ​: P4-P6 is used indoors, and P10-P16 is used outdoors. The cost difference is 20% with a spacing difference of 1mm.
2. ​​Brightness range​ ​: Supermarket counters cost 800-1200cd/m², and parking lots start at 4000cd/m².
3. ​​Protection level​ ​: Outdoor screens must have IP65 certification (dustproof and waterproof)

A restaurant owner bought the wrong brightness specifications and could not see the specials on the window screen clearly during the day. Later, he spent an extra 20,000 yuan on reinstallation. remember:​ ​Brightness is not better when it is higher​ ​, it needs to be adjusted according to the ambient light. Now the smart dimming screen can automatically adapt to the light intensity.

​​Procurement avoidance comparison table​​

Special reminder​ ​Cabinet material​ ​, never buy galvanized sheets! The current mainstream is die-cast aluminum cabinets, which although 15% more expensive, have good heat dissipation and do not deform. I bought a low-quality box in a shopping mall last year. After half a year of use, the joints were completely rusted.

​​Five must-see items during factory inspection​​

1. Check to see if there is an SMT placement machine in the workshop (to ensure the accuracy of lamp bead welding)
2. Touch the sample screen frame to see if there are burrs (to determine the mold accuracy)
3. Check the "grayscale" on the test report (must be ≥16bit)
4. Ask clearly about the power module brand (Delta/Mean Well's are more expensive than other brands but more stable)
5. Test the response speed of the control system (the delay after pressing the button is not allowed >0.5 seconds)

Let me teach you a trick: bring a USB flash drive to save the gradient grayscale image, and use your mobile phone to shoot a slow-motion video during the live broadcast.​ ​Direct pass with horizontal stripes or frame skipping​​。

​​Frequently Asked Questions and Answers​​
Q: Why is the price difference 3 times for the same specifications?
A: Lamp wicks are divided into grades such as Preh/Jingyuan. The light decay of inferior wicks exceeds 30% in 2 years, while good wicks can maintain 85% brightness after 5 years.

Q: How to judge whether it is a refurbished screen?
A: The new screen’s lamp bead solder joints are matte silver-white, while the refurbished screen has traces of secondary welding.

Q: What should I do if there is a sudden failure?
A: Choose a manufacturer with 24-hour technical support. Remote guidance can solve 80% of the problems, which is three times faster than waiting for the maintenance team.

The editor has seen too many cases of being greedy for cheap and suffering big losses. To be honest:​ ​Buying an LED screen is like buying an air conditioner​ ​, the installation service is more important than the machine itself. Especially for engineering screens, don’t save the installation fee. A customer asked Guerrilla to install it himself, but the drainage design was reversed, and water poured directly into the control card when it rained.

Finally, an industry secret is revealed: manufacturers with a monthly production capacity of more than 10,000 square meters can purchase raw materials at a price that is 25% lower than that of small workshops. This cost difference is enough to upgrade your configuration. When purchasing next time, you might as well ask: "Can you send me the operation training video of the control system?" "——Manufacturers who are willing to provide detailed tutorials will generally have good after-sales service.

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