Recently, Lao Wang encountered something bad when he opened a shopping mall - an LED screen that cost 300,000 yuan was covered with fog in broad daylight! This incident made me suddenly realize that the water used to choose a pixel screen is much deeper than that of a mobile phone. Today we broke it apart and talked about it. Where should I buy this thing so I can’t get a trap?

​​The secret of pixel spacing is hidden. Choose the wrong choice and burn money directly​​
Did you know? The difference in the number behind P is 0.5mm, and the price can be different from the wheel! For example, the P2.5 and P3 screens are also worth a 100-meter difference. The key depends on​ ​Range of sight formula: pixel pitch (mm)×2=optimal viewing distance (m)​ ​. If your shopping mall channel is 8 meters wide, it is best to choose P4 ； But if the jewelry counter is displayed, you must have P1.8 or below, otherwise it will be all mosaics.

There is a living case: A Southeast Asian commercial complex mistakenly chose P3 as a window screen. The customer looked closer and saw the details of the jewelry. Finally, it was disassembled and reinstalled for an extra 500,000 yuan. A lesson from blood and tears!

​​The real thing is to change the brightness​​
Don't just listen to the seller's "highest brightness", you have to see​ ​Intelligent dimming range​ ​! The indoor screen must be automatically adjusted between 800-1200cd/m². In places like libraries, the late-night mode must be reduced to below 300. Outdoor screens have to be built - the actual measured data is speaking. At noon, the screens with brightness below 4000cd/m² are basically scrapped.

There are so many ways here:

• Automatically brighten 15% anti-water mist reflection in rainy days
• Turn on low blue light eye protection mode in the backlight environment
• Brightness compensation is completed within 0.3 seconds when the sudden strong light is shining

​​Hidden costs can eat half a screen​​
Do you believe that the five-year maintenance fee accounts for 55% of the total investment? I have disassembled the account book: electricity bills account for the majority, followed by color difference correction. If you want to avoid being slaughtered, these two must be welded to death in the contract:

1. ​​With energy consumption monitoring chip​ ​Models, save 23% of electricity bills per year
2. ​​Cloud color calibration system​ ​Standard configuration, the color shift of a stadium in Tokyo last time, the engineer did it in Shenzhen.

Don’t believe the nonsense of “ten years of maintenance-free”! The most pitfall case I have seen is that the pixel decline occurred in the screen for half a year, and the repair fee after the manufacturer ran away was even more expensive than the new screen.

​​Future trends need to be stuck in advance​​
Now the top pixel screens are playing "environmental symbiosis"! A certain arc screen in Singapore can switch the display mode according to the traffic flow - advertising is broadcast at rush hour in the morning and evening, and it becomes an art installation during peak hours. What's even more amazing is the integrated air monitoring, which automatically turns red when PM2.5 exceeds the standard. This interactive design is amazing!

If I ask me, buying a pixel screen is like finding a wife - parameters are the basics, and the temperament must be consistent, and the key is to be tough (referring to after-sales service). Next time you want to purchase, you will fight these three things: pixel density, dynamic dimming, and cloud operation and maintenance. It will be like new after ten or eight years of maintenance. The money saved is enough to open a branch!

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