Alas, brother, are you worried recently? I wanted to buy a mechanical LED display screen, but when I searched for Taobao and Dong, there were more merchants who jumped out than those who sold pancakes at the subway entrance! What are the "industrial-grade waterproof screens" and "ultra-long life engineering screens" that are dazzling. Don’t panic. Today I will take out the dry goods at the bottom of the box and teach you step by step to pick a reliable display screen. Keep it safe and don’t get stuck after buying it!

1. What is a mechanical LED display?

Don't rush to get your wallet! We have to figure out what this thing is for. Simply put, it is​Big display assembled with metal frame​​, the biggest difference from the TV at home is that this guy is specialized in heavy work! for example:

• Construction information billboard at the entrance of the construction site (not afraid of wind and sun exposure)
• Operation indicator screen on factory assembly line (no shutdown for 24 hours)
• The warehouse's cargo dispatch display screen (it has to withstand the occasional "close contact" of the forklift)

To give a real example: Last year, a logistics warehouse in Shenzhen installed a P4 outdoor screen, but it was hit by a blown shelf on a typhoon day. The screen actually had a scratch on the corners - why is it so resistant to making? The secret is​All aluminum magnesium alloy box + IP65 waterproof structure​It's hidden inside!

2. Three soul questions that must be asked before buying a display screen

​Question 1: Where to use this screen?​​

• Place in an indoor workshop? Choose a brightness of 800-1200cd/m² to be enough
• Install it on an outdoor construction site? Without brightness above 4000cd/m², it is impossible to see clearly under the sun
• Do you need to disassemble and carry it frequently? You have to find a rental screen with a quick disassembly structure (I secretly tell you: Now the high-end model can disassemble 200 screens in 30 minutes!)

​Question 2: What effect does the display content need?​​

• Simply display text? The regular P6-P10 spacing is sufficient
• Want to put product details? You must choose a high-definition screen below P4
• Need dynamic video? The refresh rate must be ≥1920Hz (or it will be full of water ripple when taken)

​​Question 3: What level is the budget stuck?​​

• Temporary use of 1-3 months: It is recommended to rent more than buy more (the average daily cost can be reduced to 2 yuan/square meter)
• Long-term use for more than 3 years: Buy commercial grade directly (don't think it's expensive, it may be cheaper than milk tea every day)

3. Purchase secrets that experts know

​Don't be fooled by the parameters:​

• ​Pixel spacing​Not the smaller the better (P2.5 is a waste to look at 10 meters away)
• ​​Brightness adjustment​ Must have smart functions (automatically adjust the darkness in the middle of the night to save electricity and protect the eyes)
• ​​Protection level​At least IP54 starts (dust and waterproofing is the basic operation)

​​Don't feel troublesome when touching the real thing:​

• Work with the back of your hand for 10 minutes (the machine with good heat dissipation will not be hot)
• Take your phone to the screen to record the video (direct pass with strobe)
• Check splicing seams (high-quality product gap ≤0.1mm)

Recently, I helped my friend choose a P6 outdoor screen for the construction site. The manufacturer did a trick - adding a shock-resistant rubber pad to the structural parts. As a result, the equipment encountered a level 7 gust of wind the next day, and the screen remained motionless! So say​Good structure can really save lives​Ah!

4. I'll step on these pitfalls for you first

1. ​​Beware of low-price traps​
   Last month, a friend bought a piece of screen that costs 800 yuan per square meter for cheap, but it started to be outstanding after using it for two months. After taking apart, you can see that the power supply is actually a copycat! Remember:​The cost price of P6 outdoor screens of regular manufacturers is 1,200+/square meter​, there is definitely a problem below this number!

2. ​​Don't install the service​
   The most outrageous case I have ever seen: a factory bought a high-end screen and installed it by itself, but the signal cable was connected to the reverse and the control card was burned. Professional matters must be left to professionals. Now reliable manufacturers are responsible for installation and debugging, and some can be guided remotely.

3. ​​After-sales guarantee depends on the details​
   Focus on these three points:

• The warranty period starts at least 2 years (those who dare to protect for 5 years are tough characters)
• Fault response time (it is really reliable when you come to the door for 24 hours)
• Spare parts inventory (those who say on-site repairs are all hooligans who have to wait for accessories)

5. Personal advice

After playing with the display screen for more than ten years, my biggest experience is only eight words:​Scenarios are preferred, service is king​. Although the streets are all made screens now, they can truly make solid installation, debugging, after-sales maintenance and count them with both hands. Especially for brothers who are doing mechanical equipment, don’t buy three-no products with cheap prices - the production losses caused by broken screens on the construction site are enough to buy ten new screens!

Finally, let me tell you a cold knowledge: Some manufacturers have started playing now​Modular designIt’s like Lego, you can freely combine screen shapes. I just met a hexagonal splicing warehouse dispatch screen last week, and the sense of technology is simply amazing! So when buying a display screen, finding the right manufacturer can really open the door to a new world.

(Note: The technical parameters and cases in the article are all from industry general data, and some details have been blurred)

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