Alas, recently a friend asked me: "I want to install a large LED screen in the store. I found hundreds of brands online, but the price difference is ridiculous. How should I choose? "To be honest, this thing is like buying a car - the layman watches the fun, while the expert sees the trick. Today we will break it apart and chat, so that you can chat with the manufacturer after reading it!

1. Get three things to know first when buying a screen

​​1. Where do you use it? ​ ​

• ​​Outdoor advertising screen​​: Must resist creation! The brightness starts at least 4000cd/m² (it won’t be caught in the sun), and the waterproof level must be IP65 up (it will still be as stable as an old dog on heavy rains)
• ​​Shopping mall window screen​​: The transmittance must be sufficient! It is recommended to choose more than 86% of transparent models (don't let the screen block the product)
• ​​Stage rental screen​​: Lightweight is the most important! Aluminum-magnesium alloy box with quick disassembly structure can be disassembled 10 square meters in 5 minutes

​​2. How much are you going to spend? ​ ​
For example, if the screen with the same P3 specification is sold on e-commerce platforms, it may be a public model product (after-sales service? It does not exist), a professional manufacturer with a capacity of 6,000/㎡ for three years of home maintenance. Here is a key point——​ ​Don't just look at the unit price! Installation fee, shipping fee, maintenance fee must be included​ ​

​​3. What service do you want? ​ ​
The most scammed thing I have ever encountered: a customer bought a low-priced screen with a cheap price, but the motherboard was burned in a rainy rain. The manufacturer actually said that "artificial damage is not warranty." So,​ ​These three points must be written in black and white​​：
① Warranty includes labor costs
② How to compensate for repair responses exceeding 48 hours
③ Software upgrades are not charged

2. There are so many tricks in the parameters

​​It’s so common to have a brightness mark! ​ ​I will teach you a trick: turn on the professional photo mode of your mobile phone and meter it in front of the screen. If the EV value is less than 12, this screen will definitely become "blind" under the sun.

​​Don't be fooled by refresh rate​​:1920Hz is the watershed in the industry, and screen videos below this number are all ripple. A friend who was on the live broadcast suffered a loss - he bought a screen with a nominal 3840Hz, but after using professional equipment to test it, he only had 1200Hz, and the return was arguing for half a month!

​​Here's a personal opinion​​: Now some manufacturers like to blow "nanocoated dustproof", but they are actually IQ tax! What is really reliable is the structural waterproofing - see if there is a three-layer silicone seal on the joints of the module, and whether the heat dissipation hole is a maze-style design.

3. The procurement channels are very deep

Experience in helping restaurant chain purchases last month:

​​The key point is here​​: It is recommended to find a factory directly if the budget exceeds 50,000, which can save 25%-30% of the interim costs. But keep a close eye on three points——
① See if there is a fully automatic chip machine in the production workshop (the hand-welded screen cannot be used)
② Ask if the modules are in the same batch (color difference can make people angry)
③ The test report must contain a CMA certification seal

4. Knowledge in installation and maintenance

The most outrageous scene of overturning: a 20-square-meter curved screen was installed in the atrium of the mall, but the load-bearing beam was not reinforced, and the screen fell off the day of opening! So:

1. Outdoor screens must be calculated for wind load (high winds of level 8 are the bottom line)
2. The power supply line must be routed separately (don't squeeze a switch with the air conditioner)
3. Clean the dust at least twice a month (it will be done if the dust accumulates more than 3mm of heat dissipates)

​​Personal bloody and tears lessons​​: Don’t believe in the “maintenance-free” nonsense! I bought the so-called self-cleaning screen before to save trouble, but the southern plum rainy season directly grew moldy spots. Now I’m learning my lesson - when signing the contract, let the manufacturer give you two years of free maintenance!

5. Exclusive advice from industry veterans

There are two new trends in the market now:

1. ​​Flexible screen becomes a hot commodity​​——Restaurants use 360° circular screen to engage in immersive dining, and the average customer price can increase by 20%
2. ​​Remote operation and maintenance are standard​​——Any better manufacturers can check the screen status on your phone, and automatically alarm when the temperature is high

Finally, let’s say heartfelt words: buying an LED screen is like a person. Don’t just look at the appearance (parameters), but also the inner (quality control) and sense of responsibility (after-sales service). Remember these horoscopes——​ ​"Read more and ask more, choose fast installation slowly"​​, make sure you don’t step on the pit!

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