Do you often see those shocking giant screens in stadiums and concerts, and you mutter to yourself:​Where can ordinary people see these LED engineering screens that are bigger than my living room?​More importantly, when purchasing such professional equipment, you can’t just place an order by looking at the brochure, right? Today we will reveal the "unwritten rules" of this industry to ensure that you avoid detours.

Sprinkle cold water first - don't trust those businesses that say "come in our exhibition hall to see it casually." The real engineering screen is to​Practical use environment​Tested in ​. Just like when buying a windbreaker, you can’t just try it on the mall, you have to go to the snow mountain to test it. The organizer of a music festival suffered this loss last year. The screen was fine during the warehouse test, but it was installed on the outdoor stage, but due to the sea breeze, a large area of ​​dead lights appeared in three months.

Three golden points for offline live surveys

If you want to see the real effect of the engineering screen with your own eyes, these three places are the most reliable:

1. ​​Sports event venues​: Pay attention to the protective performance of the fence screen, and the scores will still be clearly displayed on rainy days.
2. ​Urban Transportation Hub​: The advertising screens at airports and high-speed rail stations are the best test of continuous operation ability, after all, they will not turn off the plane for 24 hours.
3. ​​Large performance venue​: Whether the rental screen is quick disassembly and assembly design is good, you can tell it by looking at the smoothness of the equipment team when changing the scene.

There is a trick - pay attention​Industry Exhibition Schedule​. For example, at the Display Technology Expo in March every year, exhibitors will set up real usage scenarios. Last year, a booth directly moved the swimming pool into the showroom to demonstrate the waterproof performance of the underwater LED screen. This opportunity that is realistic cannot be missed.

How to distinguish between real and fake online channels?

Nowadays, many manufacturers are doing VR, but there are many ways here:

• ​​Look at the reflective details​: When shooting a real engineering screen, it retains the subtle reflection of the metal frame, and CG synthesis is often too perfect
• ​Listen to the ambient noise​: On-site shooting videos can include cooling fan sounds, and fake ones will usually be covered with background music.
• ​Check timestamp​: The other party is required to provide construction site video with date watermark, and it is best to see the pictures under different weather conditions.

Teach everyone a trick: Let the sales manager​Live video connection​. Point the phone lens at their test workshop and require random sampling of the brightness uniformity of a certain screen. Manufacturers who dare to operate like this have basically guaranteed product quality.

How to view the key parameters of the engineering screen?

Don't be scared by the dense technical parameters, remember these three core indicators:

1. ​​Protection level​: At least IP65 is required for outdoor use. The larger the number, the stronger the protection (for example, IP68 can be soaked in water)
2. ​​Refresh rate​: Only above 1920Hz can ensure that the videos taken do not flash. You can measure it by pointing your phone camera at the screen.
3. ​​View angle range​: 160° is the minimum standard, and the good engineering screen will not turn color when viewed from the side

There is a real comparison case: both manufacturers have nominal brightness of 3000cd/m², but field tests have found that the screen of Home A seems to be covered with gray under the noon sun, while Home B’s is still bright - it turns out that Home A plays word games, and it is targeted to be peak brightness rather than continuous brightness. Therefore, the parameters cannot be fully trusted, but depends on the actual performance.

Hidden test points for special scenes

If you want to look at a special purpose engineering screen, you have to prepare some "over-the-syllabus":

• ​​Seismic Test​: Let the manufacturer demonstrate the screen's shock resistance in transportation state, and move it up and shake it twice to hear if there are any abnormal noises in parts.
• ​Extreme temperature​: It is required to provide test videos of high and low temperature laboratories, both minus 20℃ and 50℃ must be started normally
• ​Signal compatibility​: The real thing is to bring an old laptop to test on-site. It is compatible with VGA interfaces.

Have you heard of the weird needs of that desert music festival? The organizer requires that the screen can not only resist sandstorms, but also be able to work continuously at high temperatures of 50℃ for 18 hours. The final winning bid was usedSpecial heat dissipation coating​, It is said that air insulation layer can be formed on the panel, and this black technology parameter table will not be written.

Editor's point of view: Looking at the engineering screen is like taking the pulse of traditional Chinese medicine. You cannot just look at the surface, you have to look at, listen, ask, and touch the whole set. Next time I encounter a salesperson who is full of fantasy, I will ask him directly if he dares to install the screen on the site you designated for trial operation for three months - real gold is not afraid of fire, and good screens can withstand the tossing.

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