Those advertising screens that are dozens of meters wide on the roadside look quite intimidating, don’t they? Last year, a chain restaurant brand spent more than 3 million to install screens. As a result, color patches appeared after the rainy season, and the maintenance fee was more expensive than the installation fee! Today we will explain clearly what kind of outdoor screen is really good.

​​#Waterproof and dustproof are the bottom line​​
Don't be fooled by the sales about "military-grade protection", just look at the parameters! ​ ​IP65 certified​ ​It is the basic threshold. This level means that it can withstand high-pressure water gun cleaning. Here’s a little bit of trivia – for a screen that can truly withstand the test, the wiring port will be made into a gooseneck structure, and it can still play videos normally during heavy rain.

The test method is also simple: take a mineral water bottle and pour water against the heat dissipation hole. If the water drops roll down in a lotus leaf effect, it means the hydrophobic coating meets the standard. Friends in the southern region should pay special attention. When the humidity exceeds 85% during the rainy season, the humidity inside the screen must be kept below 35%. This requires​ ​Dual channel dehumidification system​ ​to achieve.

​​#Brightness adjustment hides a lot of knowledge​​
Have you ever seen a screen that lights up your eyes during the day and turns you blind at night? Qualified outdoor screens must be able to​ ​4000-7500 nits intelligent adjustment​ ​. There is actual measured data - a screen with a light sensor consumes 38% less power per day than a screen with a fixed brightness. Focus on these two functions:
√ Automatically track sunrise and sunset times
√ Manually set the brightness curve (for example, automatically reduce the brightness by 30% after 8 pm)

There is a pitfall here: the brightness of some screens is adjusted as a whole, and a good screen should support partitioned light control. For example, when sunlight only shines on the left side of the screen, the brightness of the right half is not affected. This technology can extend the life of the lamp beads by 20%.

​​#The cooling system determines life and death​​
Have you ever touched the back of an outdoor screen? If it’s hot, just pass! Under normal working conditions, the heat sink temperature should be controlled within 55°C. There is a case - a screen was used at a highway intersection​ ​Turbocharger air duct​ ​, the temperature is 12°C lower than the traditional structure under the same power.

When selecting a screen, focus on the distribution of heat dissipation holes:

1. The air inlet must be at the bottom of the screen (with dust filter)
2. The air outlet is designed at a 45-degree angle (to prevent rainwater backflow)
3. There must be thermal imaging monitoring points inside (automatic frequency reduction when exceeding critical value)

​​#Three iron rules for installation and maintenance​​
Don’t think that everything will be fine once you finish pretending! The most outrageous case I have ever seen was that the screen was blown off by strong winds, and it was found that four expansion screws were missing. Remember these numbers:

• No less than 8 fixed points per square meter
• Ground resistance must be <4Ω
• Conduct stress testing at least twice a year

Maintenance costs must also be calculated in advance:

Personal experience: Those who boast a "ten-year warranty" will 80% consider natural wear and tear as man-made damage. Dare to sign with truly reliable manufacturers​ ​Performance degradation commitment letter​ ​, such as ensuring that the brightness attenuation does not exceed 15% within three years. Remember to write this in when you sign a contract next time, so that it is written in black and white!

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