Do you often stare at the weather forecast screen on the street and be stunned? It is obvious that mobile phones can also view the weather, so why do locals still spend a lot of money to install these big guys? Today, let’s talk about this weather display that looks ordinary but actually has hidden mystery. (I secretly tell you that a coastal city replaced a new display last year, and the response speed of typhoon warning was two hours faster! )

1. Hard-core technical threshold for meteorological screens

​​Let me tell you the truth first: Not all LED screens can be used as weather screens! ​ ​ Think about it, not only must this thing withstand the scorching sun and heavy rain, but also do:

• ​​Intelligently adjust brightness at any time​​: At noon, it will light up to 4000cd/m² under the sun, and it will automatically drop to 800cd/m² on rainy days. This is not something that ordinary screens can do.
• ​​24 hours uninterrupted operation​​: Have you seen the display screen of a bank ATM? The stability requirements of meteorological screens are ten times higher than that, and the annual failure rate must be achieved <0.3%.
• ​​Millisecond information update​​: The sudden heavy rain warning is transmitted from the Meteorological Bureau to the display screen, and the entire process must be controlled within 3 seconds.

For example: The old screen installed in a northern city in 2019 will be filled with the screen when the temperature drops to -25℃ in winter. After replacing the professional screen with a constant temperature system, it will still be displayed clearly in -40℃. There is a cold knowledge here - a truly qualified meteorological screen, and the circuit board must undergo 72-hour salt spray test, and the coastal areas will not rust for five years!

2. Three basic needs for professional meteorological screens

​​1. The bottom line is to see clearly​​
In a direct light environment, ordinary advertising screens are like beauty-looking-looking, with bright details all blurred. Professional weather screens must do:

• ​​Pixel density ≥1500 dots/m²​​(More delicate than the mobile phone screen)
• ​​Viewing angle ≥160°​​(You can see clearly even when standing diagonally opposite)
• ​​Grayscale 16bit​​(The dark clouds and light haze are clearly distinguished)

​​2. Be able to withstand extreme weather​​
When typhoon "Plum Blossoms" passed last year, 20% of the outdoor screens in a port city were paralyzed. The survival indicators of professional weather screens are as follows:

• Working temperature -40℃~+85℃
• Protection level IP66 starts (high-pressure water gun is rushing straight for half an hour without water inlet)
• Wind resistance level 12 (equivalent to wind power that can blow away 200 kilograms of strong men)

​​3. Zero error in information transmission​​
Here is an insider of the industry: many units have suffered secret losses! When the normal screen displays "Blue Warning of Heavy Rain", if the red display module happens to be damaged... Professional weather screen must be equipped with​ ​Dual system redundant backup​​, if the main control board is broken, the backup board will automatically take over within 0.5 seconds, and there is no chance of displaying blank space at all.

3. Guide to selecting screens and avoiding pits

​​Q: How to determine whether the screen is suitable for weather? ​ ​
Teach you three practical methods:

1. At 12 noon, 3 meters in front of the station screen, can you see the minimum font size clearly (suggested ≥35mm)
2. Splashing water in a basin imitates a rainstorm to see if the content is deformed
3. Quickly stroke the surface of the screen with your palm to feel whether there is any obvious heat (high-quality screen temperature rise <15℃)

​​Q: Will the maintenance cost be very high? ​ ​
Here is a data comparison:
│ Project│ Ordinary advertising screen│ Professional weather screen │
│--------------│------------│------------│
│ Average daily power consumption│ 18 degrees│ 9.6 degrees │
│ Number of maintenance times in the year│ 6-8 times│ 1-2 times │
│ Accessories replacement rate│ 23% │ 5% or less │

(Real case of a local meteorological bureau: the annual maintenance fee for using ordinary screens was 120,000 yuan in 2018, and it was directly reduced to 28,000 yuan after changing professional screens in 2020)

4. What does the weather screen look like in the future?

Now cutting-edge technologies have started to play tricks:

• With real-time monitoring of air quality (PM2.5 values ​​are directly displayed on cloud patterns)
• UV intensity change reminder (the screen border turns red when the value exceeds the standard)
• Touch interactive query (click the typhoon path to see real-time dynamic pictures)

I heard that there is a darker technology recently - using the screen cooling system to collect rainwater, and then purify it and provide it directly for emergency and disaster relief. This idea is not acceptable!

Editor's opinion: Choosing a meteorological screen is like finding a partner to live. It is useless to be beautiful, and it must be able to withstand the firewood, rice, oil and salt. Those screens that can automatically adjust brightness, have intelligent temperature control, and have redundant backups are really reliable. Don’t be confused by the fancy functions, remember three core points: see clearly, carry it for a long time, and pass it accurately!

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