Alas, don’t say it, it’s really not an easy thing to buy an LED advertising screen now. Last month, my friend opened a shopping mall and insisted on purchasing a large screen by himself. As a result, he was dizzy by the parameter table - what refresh rate, pixel spacing, and brightness adjustments look like a heavenly book. Today we broke it apart and broke it up and talked about how to choose this thing to be reliable?

1. First understand what you are going to do?

Buying a screen is like buying shoes - you have to look at the occasion first! You can't go to a marathon wearing flip flops, right?

• ​Street shops attract business​: 5-10 square meters of P6-P8 screen is enough, and the price is affordable
• ​​The eye-catching artifact of the shopping mall atrium​​: You must choose a high-definition screen below P3, preferably with automatic brightness adjustment function
• ​Concert stage background​: You must use a rental screen with a high refresh rate (at least 3840Hz)

The owner of a chain hotpot restaurant complained to me that he bought a low refresh rate screen last year for cheap photos, but the videos taken on Douyin were all ripple, which looked like signal interference. So,​Use is more important than anything else to the scene​​。

2. You have to know these parameters

Don't be fooled by salesmen! Remember these core indicators:

1. ​Pixel spacing​: The smaller the number, the clearer it is (the value after P)
   • 5 meters outside to choose P6
   • Select P2.5 for interaction within 3 meters
2. ​​Brightness adjustment​：
   • Indoor 800-1200 nits just right (too bright hurts the eyes)
   • Outdoors below 4,000 nits, they become mute in the sun
3. ​​Protection level​：
   • IP43 is enough for indoor
   • Open air must be IP65 rainproof and dustproof

Last time I met a milk tea shop owner and spent a lot of money to buy an outdoor screen to install it in the store, but the customer was so lit up that he covered his eyes. This is like wearing short-sleeved sleeves in the middle of winter - it’s not that the things are bad, it’s that they use the wrong place!

3. Find a manufacturer to remember these five-step instructions

1. ​​Looking at the workshop is more important than looking at the exhibition hall​​：
   Once I went to a manufacturer for inspection, and the exhibition hall was decorated like an Apple experience store, but the workers in the workshop were still manually soldering circuit boards. Later I learned that their monthly production capacity is only 2,000 square meters, which can this ensure quality?

2. ​​Don’t just look at pictures for cases​：
   A reliable manufacturer can show you the installation site video, and it is best to contact real users to learn from the scriptures. I heard that there is a home that makes stadium fence screens. The product has been used in Tokyo Olympic venues for three years without any problems.

3. ​​Ask the after-sales service, don't be afraid of trouble​：
   Have you tried calling at 2 a.m. for technical support? There are really manufacturers who can provide 24-hour online guidance. I met a customer when the screen was blown by a typhoon, so the manufacturer directly sent an engineer to take a red-eye flight to repair it.

4. ​​Certification check is not a formality​：
   CCC and CE certificates need to be carefully read the numbers. Now, you can fake them with dozens of dollars on Taobao. The copycat factory exposed last year had the same certificate as the real one, but the product faded after half a year of use.

5. ​​More than price​：
   Don’t just look at the quotation per square meter, and count the electricity bill, maintenance bill, and replacement parts costs. It looks like a cheaper screen of 2,000 yuan, but the electricity bill I paid in more than three years is enough to buy another half of the screen.

4. Don't forget these three things before paying

1. ​​Live viewing mockup​​：
   Let the manufacturer draw a red solid color picture and get closer to see if there are any highlights and bad points. Once I saw a screen at the exhibition. It was very beautiful when I played the promotional video, and the solid color picture looked like a starry sky.

2. ​​Trial content​：
   Take the USB flash drive to broadcast the actual promotional videos of your store to see if the colors are accurate. The most outrageous thing I have ever seen is that there is a screen that shows everyone's faces green, making them look like an alien.

3. ​​Details of signing a contract​：
   Write down the warranty period, response time, and accessories prices clearly in black and white. The most deceptive case I have ever heard of is that changing a power module costs 8,000 yuan, which is more expensive than buying a new one.

After all, buying an LED screen is like finding a partner - just looking at the face is not enough, you have to look at the inside. Those who have guaranteed the "lowest price on the entire network" will cut corners in invisible places. On the contrary, manufacturers who honestly show you the production line and show their technical trump card can really accompany you for a long time. If you are not sure about your ideas next time, remember to clearly list the usage scenarios and budgets, and directly contact the manufacturer technician to chat with it. It is more effective than arguing with sales!

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