Recently, we have been seeing 360-degree press conferences in our circle of friends. Are you also curious: Where can you see this kind of ring-shaped LED screen that completely envelops people in light and shadow? Today, let’s talk about this new thing that makes technology fans scratch their heads.

▌In what situations would a circular screen be used?
Let me start with a little trivia - last year at a mobile phone brand's new product launch conference, a circular screen with a diameter of 18 meters was used. The audience was stunned when they entered the venue, and the entire space seemed to be sucked into a digital vortex. This equipment is mainly used in three types of situations:
​​• Technology product launch conference (mobile phones, cars, smart homes)​​
​​• Immersive Art Exhibition​​
​​• High-end business forum​​

But be careful, not all ring screens are the same! There are currently two mainstream structures:
→ Modular splicing type (suitable for short-term activities)
→ Overall curved screen (suitable for long-term exhibitions)
The exhibition hall I saw in Shenzhen last month had an entire wall made of wavy LED curved surfaces. If you look closely, you can’t even feel the connecting seams. This craftsmanship is really awesome.

▌Three tips for finding a venue
The most common mistake newbies make is running around the city. Remember these three clues:
​​① Pay attention to the Science and Technology Museum/Exhibition Center schedule​​
​​② Pay close attention to the brand’s official warm-up poster (the one with a circular outline in the background)​​
​​③ Pay attention to digital advertising in subway stations (there are often event announcements)​​

There is a trick - sweep the streets after 9pm. Many press conferences are set up late at night, and you happen to be able to see workers assembling the circular screen. I passed by the Convention and Exhibition Center last week and happened to see them debugging. The 20-meter-long circular screen slowly unfolded like a Transformer. The scene was more exciting than seeing the finished product.

▌How can you tell the way?
A layman looks at the fun, while an expert looks at the parameters. These indicators determine the grade of the ring screen:
​​• Radius of curvature (the smaller the number, the sharper the bend)​​
​​• Pixel density (particles cannot be seen with the naked eye below P2.5)​​
​​• Synchronization delay (less than 0.03 seconds before the picture can keep up with the head turning speed)​​

Remember to bring a bottle of mineral water! Place the bottle against the screen. On a good screen, the water ripple reflection should be evenly spread. This method is particularly useful when choosing a concert venue, as it can quickly determine the flatness of the screen.

▌Unexpected hidden features
Do you think the ring screen is just for playing videos? So naive! Now high-end models can do:
→ Automatically adjust picture perspective based on audience position
→ Switch between warm and cool tones through body temperature sensing
→ Combined with AR glasses to achieve multi-layer spatial superposition
Last year, a car company's press conference was even more amazing. The screen could capture the movement of the audience's pupils, and the car lights would actually switch between high and low beams according to the direction of your sight.

The editor has two final words: If you really want to go see it, remember to choose the middle position in rows 5-8. This area can not only see the overall effect clearly but also avoid cervical spondylosis. By the way, it’s better to wear solid-colored clothes to experience it. The reflection of colorful clothes will destroy the immersion. It is said that next time a company will hold a press conference with a circular screen with a diameter of 30 meters. Then we can form a team to open our eyes?

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