Alas, have you noticed it? Now there are more and more large LED screens on the street, but why are some screens as clear as mobile phones, while others seem to have mosaics? Last week, my cousin opened a milk tea shop and bought an LED screen for 50,000 yuan. As a result, she couldn't see the menu clearly during the day. She was so angry that she almost sold the screen as scrap iron. Today, let’s talk about how novice Xiaobai can buy an LED screen that is not a trick.

1. Buying a screen is not about buying a cabbage before understanding these three parameters.

To be honest, when I helped someone pick an LED screen for the first time, I was confused when I saw the parameter table - what do the numbers P2, P3, and P4 mean? Later I figured it out, I found out that​ ​The P value represents the pixel spacing, in millimeters​​. Take a chestnut:

• ​​P2.5​​: Suitable for viewing within 5 meters (the cash register of milk tea shop)
• ​​P4​​: Suitable for 10 meters distance (Mall Atrium Advertising)
• ​​P6​​: Suitable for 20 meters away (large screen on the roof)

A man who runs a hot pot restaurant complained to me that the P6 screen he bought on a certain platform was installed on an 8-meter-wide store. When you look closer, it feels like playing a pixel game. So,​ ​Selecting a screen is like wearing glasses, the most important thing is to choose a screen​​。

2. Price fog: What is the difference from thousands to hundreds of thousands?

I know you want to ask the most: "How much does this thing cost?" " But the price of LED screen is the same as the base of hot pot, and the price difference can be ten times different in different ingredients:

​​Entry-level (30,000-80,000)​​：

• Suitable for small stores under 50㎡
• Commonly used P4-P6 specifications
• Average daily use of less than 8 hours
• Note: Automatic brightness adjustment must be provided, otherwise it will be manually adjusted on cloudy and sunny days.

​​Commercial grade (100,000-300,000)​​：

• Special for shopping malls/office buildings
• Must bring IP65 waterproof (must-see in rainy areas in the south)
• Case: A chain gym used a screen with a cooling system, but it has not failed in three years

​​Engineering grade (500,000+)​​：

• Airport/Sports Stadium
• 24 hours uninterrupted operation
• Focus on the cooling structure and power supply redundancy design

3. Guide to avoid pits: You will regret it when you step on these three minefields

Last month, a fan sent me a private message saying that the screen will appear in half a year after it is used, and the repair fee is more expensive than buying a new screen. Remember these bloody and tears lessons:

1. ​​The lifespan of the lamp beads needs to be asked clearly​​：

   • Qualified product lifespan ≥50,000 hours
   • Use inferior glue for inferior products, which will turn yellow at high temperatures
   • Test method: open the screen continuously for 72 hours to see if there are any dark spots

2. ​​Protection level cannot be saved​​：

   • Outdoor screen at least IP65 waterproof
   • IP67 is required by sea/high humidity areas
   • The most exaggerated thing I have ever seen is the mushrooms on the back of the screen...

3. ​​Control cards need to be natively matched​​：

   • Don't buy second-hand control cards to save money
   • Missing match will cause splash screen/stutter
   • Say important things three times:​​Need original! Need original! Need original! ​ ​

4. The bosses who have used these black technologies say they are really good

There are some new technologies in the industry now, which are particularly suitable for specific scenarios:

​​Transparent screen​​：

• 86% transparency
• Installed in the window will not affect lighting
• It is very useful for promotions in shopping malls

​​Floor tiles screen​​：

• Aviation-grade aluminum as the bottom shell
• Anti-slip surface treatment
• Suitable for show at the press conference, a mobile phone brand played a special effect of "Walk Walking" last year

​​Flexible screen​​：

• It's OK to install it on a cylinder
• Transport weight reduction by 60%
• Suitable for short-term activities such as pop-up stores

5. Personal suggestions: After-sales service is more important than product

After working for so many years, I have seen too many people fall into after-sales service. Let me tell you a real story: On a typhoon last year, water was injected into the outdoor screen in a supermarket. The supplier brought the backup module to the door the next day, and it was done in two hours. What is the key? There are 30 service outlets across the country, and engineers are on standby 24 hours a day.

So, please ask clearly before placing an order:

1. How long is the warranty period? (The industry standard is 2 years)
2. Are there any local repair points?
3. How long does it take to arrive at the scene after a sudden failure?
4. Do you need an extra fee for software upgrades?

Finally, I would like to say the heart-wrenching words: buying LED screens is like buying air conditioners.​​Three points for products and seven points for services​​. Don’t look for small workshops with greed for cheapness. If something goes wrong, you won’t be able to find someone even if you cry. Now some manufacturers can provide one-stop service from design to installation, and even help you with the playback content. This is called worry-free and effortless.

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