Have you ever noticed those giant advertising screens in shopping malls that make people unable to take their eyes away? Last week, my friend Lao Wang wanted to install screens in a new shopping mall, but he was shocked by the quotations - ranging from 50,000 to 500,000! This is just like buying a mobile phone. It looks like a screen, and the doorways inside are quite deep...

Three major misunderstandings when purchasing screens in shopping malls

The most common pitfalls for novices, I will draw the key points for you:

1. ​​"The higher the pixels, the better"​ ​:wrong! It is impossible to tell the difference between P3 and P4 screens with the naked eye in a shopping mall (the actual viewing effect from 3 meters away is almost the same)
2. ​​"The brightness must be turned up"​ ​：A screen with a brightness of 4000cd/m² is used indoors? That customer must wear sunglasses when shopping!
3. ​​"Imported goods are reliable"​ ​: In fact, 80% of the world’s LED modules are made in China (an international brand foundry is located in Shenzhen)

Hidden easter eggs in the parameter table

When looking at parameters, don’t just focus on the resolution. These three indicators are the key:

• ​​Refresh rate≥3840Hz​ ​: No scanning lines will appear when shooting videos (Have you ever tried shooting with an Apple phone on a normal screen? The screen is full of ripples)
• ​​Grayscale 16bit​ ​: Black dresses will not be blurred when displayed (a clothing store’s return rate dropped by 18% after upgrading)
• ​​Color temperature adjustable range 3000-6500K​ ​: Cosmetics counters need cool white light, while jewelry counters need warm yellow light.

Thoughts triggered by Lao Wang’s story of stepping into a pit

Last year, a shopping mall discovered a problem after installing a screen: it was highly reflective during the day and too dazzling at night. Later I found out that I hadn’t considered these things:

• ​​glass curtain wall reflection​ ​: To measure the incident angle of sunlight at 10 o'clock in the morning (a certain project lost 230,000 yuan due to reinstallation)
• ​​Atrium void structure​ ​: You must use a curved splicing screen (a flat screen will have 23% visual distortion)
• ​​fire sprinkler location​ ​: Leave 80cm of inspection space at the top of the screen

How expensive are LED screens in shopping malls?

You may not expect that the price difference mainly lies in these three areas:

1. ​​Intelligent control system​ ​: A system that can automatically adjust brightness is 15,000/㎡ more expensive, but it saves 40% on electricity bills.
2. ​​Quick disassembly and assembly structure​ ​: The box with magnetic connector is more expensive at 800 yuan/unit, but the screen replacement time is reduced from 3 hours to 20 minutes.
3. ​​Cooling black technology​ ​: The one using graphene for heat conduction is 2,000 yuan/㎡, but its lifespan is extended by 3 years.

To be honest, the tricks some manufacturers are playing nowadays are really dumbfounding. Last week I went to see a new product, and the salesperson boasted that their screen can measure body temperature! If you ask me, shopping mall screens should do their job well.——​ ​The picture is beautiful enough, the operation is stable enough, and the maintenance is worry-free.​ ​. Do you think this is true?

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