I wonder if you found it? Now walking on the streets, there are bright LED screens everywhere in shopping malls, subway stations, and even at the entrances of vegetable markets. I went to the concert two days ago. What a guy. The whole stage background is full of moving LED pictures, and even the floor under the singer's feet is glowing. How many uses of this thing? Let’s take a look today.

​​1. Commercial advertising: the most expensive and profitable place​​
If you want to say that LED screens are the most used, the advertising industry must be the advertising industry. Have you noticed the huge dynamic advertisements on the exterior walls of the mall? Just a large screen that is taller than a three-story building, and now even the supermarket entrances in townships have begun to be installed. Why are merchants willing to spend this money? I'll settle the calculations for you:

• The production fee for traditional spray-painted advertisements is about 120 yuan per square meter.​ ​Although the initial investment in LED screens is high (8,000+ per square meter)​ ​, but can be recycled for 5-8 years
• The attention rate of dynamic advertising is 73% higher than that of static images. After a fast food brand replaced the LED menu screen, the average customer price rose by 18% directly.
• Support remote painting exchange. When encountering promotional activities, you don’t have to send someone to climb high to change it.

But there is a pit here to be aware of——​ ​Don't think the brightness is better​ ​. Last time, a milk tea shop owner installed a 3,000cd/m² screen used indoors at the door. It was dazzling in broad daylight, but he was fined 30,000 yuan for light pollution. The indoor and outdoor brightness standards are very different, so let's talk about this in detail later.

​​2. Cultural and Sports Entertainment: The Secret to Make You Immersive​​
Now if there are not a few LED floor tiles to watch the concert, the singer will be embarrassed to speak. Do you know? Last year, the stage LED screen was used for 2,300 square meters for a top singer's tour, which is equivalent to the size of 5 basketball courts. These screens are not casual:

• The floor tiles must be able to withstand pressure of 500kg/m² and must be anti-slip
• The background screen needs to be done​ ​Refresh rate above 1920Hz​ ​, otherwise there will be water ripples during live broadcast
• The splicing error of the side arc screen must be <0.1mm

What's even more amazing is the virtual shooting studio of the film and television base. Nowadays, there is no need to go to the desert and grassland when shooting costume dramas. The actors stand in front of the 360-degree LED ring screen, and the real-time rendering background is ten times more realistic than the green screen. I heard that a fairy tale drama uses this technology to save more than 800,000 yuan in special effects costs per episode.

​​3. Public Service: Black Technology Hidden in Details​​
Have you ever noticed the stop sign when waiting for the bus? The new generation of smart website signs has begun to use LED screens. This kind of screen is different from a home TV:

• It must work normally from -20℃ to 60℃
• Anti-graffiti treatment on the surface, tear off the small advertisement without leaving glue
• With its own photosensitive element, automatically adjust the brightness when it is dark

The hospital's number calling system has now been upgraded. The large screen in the waiting area can not only display queue information, but also play health education videos. According to statistics from a certain Grade A hospital, after using this interactive screen, the number of patients consulting and consulting desks decreased by 65%.

​​4. Special scenario: a weird usage you can't imagine​​
You may not believe it if you say it, but now even pig farms use LED screens! But they are not showing cartoons to pigs:

• Use specific wavelength light to regulate the pig biological clock
• Display ambient temperature and humidity data
• During the epidemic, you can also remotely select pigs

There is another even more amazing thing - the anti-fatigue laser curtain wall of the expressway. This special LED screen can project a 30-meter-long beam belt at night. The beam will move when the driver turns on, which is 4 times stronger than ordinary street lights.

​​Personal opinion​ ​: Choosing an LED screen is like buying clothes, the key depends on the occasion. What the exterior walls of the mall need is the "blind" impact, so you have to choose a low-bright screen that is not dazzling in the conference room. Next time you see an LED screen, you might as well pay more attention to its refresh rate and pixel spacing - these two parameters are the core of determining the display effect, which is much more important than simply looking at the price.

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