Alas, guess what? Now even the decorative balls at the entrance of the supermarket have begun to be equipped with LED screens! But serious, is it more troublesome to buy a reliable spherical LED screen than to choose an air conditioner? Don’t panic, today we will break it apart and talk about this spherical screen that looks cool and worrying when buying it. (I secretly tell you that the spherical screen that a shopping mall spent 800,000 yuan last year became "albaton areata" after using it for three months. The repair fee was enough to buy another half...)

1. How deep is the water in the spherical screen?

​​Let me tell you the truth first: not all circular screens are called spherical screens! ​ ​ The serious spherical screen must meet these three conditions:

• ​​radius of curvature error <0.5mm​ ​(Perform a vernier caliper to count)
• ​​Viewing angle ≥270°​ ​(You can also see the picture clearly from the side of the station)
• ​​Splicing seam ≤0.8mm​ ​(The hand feels like it without scratching)

The most outrageous case I have ever seen: A bar owner bought a batch of hexagonal spherical "pseudo-spherical screens" with cheap pictures. As a result, the face was completely deformed when the video was played. The DJ station looked like a haha ​​mirror, and in the end it could only be used as a decorative lamp.

2. Experts choose three axes

​​The first trick: look at the skeleton structure​​
A truly professional spherical screen skeleton is like this:

1. Aviation aluminum bracket (watch the weight, 1 meter diameter screen at least 50 kilograms)
2. Snap-mounted connection (no tools are used to disassemble and assemble, and can be done with bare hands)
3. Dual power supply redundancy (bad power supply module will not affect use)

​​The second trick: test the display performance​​
Take a steel tape measure to measure these three data:

• Minimum radius of curvature (to be able to display a complete circle with a radius of 30cm)
• The highest refresh rate (you can pass if you don’t have black bars when you take videos on your mobile phone)
• Color temperature consistency (use a piece of white paper to compare the four corners and center of the screen)

​​The third trick: Ask for after-sales terms​​
Focus on these three points:
□ Module damage response within 48 hours
□ Free surface correction once a year
□ Provide backup screen emergency response

(A certain exhibition center suffered a secret loss - the spherical screen failed on the day of the event. The supplier actually said he wanted to wait for the accessories to be sent from abroad, and was finally forced to use a projector to save the scene)

3. Installation and maintenance cold knowledge

​​Installation site selection is a priority​​
The effect of installing spherical screens in these positions doubles:

• The shopping mall atrium is 8-12 meters away from the ground (the golden height with the largest flow of people)
• The center of the dome of the Science and Technology Museum (the effect is more shocking with the ring curtain)
• Above the hotel revolving door (dynamic content attracts incoming visitors)

​​Key points for daily maintenance​​
Teach you three ways to extend your life:

1. Use a brush to clean the heat sink every week (don’t use a vacuum cleaner! )
2. Correct the surface fit once a month (test with a laser level)
3. Check the power cord connector every quarter (apply some conductive paste to prevent oxidation)

There is a more amazing thing: a certain theme park has installed an intelligent temperature control system on the spherical screen, and the brightness will automatically decrease after temperatures exceed 35℃. The failure rate in three years is 60% lower than that of peers!

4. The price trap reveals

​​Q: Why is the quotation difference ten times? ​ ​
Just look at this comparison:
│ Project│ Low-end goods│ Professional grade │
│--------------│---------------------│---------------------│
│ Light bead brand│Second-hand renovation│Original A+ products │
│ Control system│ Public version program│ Customized surface algorithm │
│ Warranty scope│ No surface deformation│ Including structural correction │

​​Q: How to determine if it is an OEM product? ​ ​
Three details reveal the truth:

1. Check whether the screw hole position is uniform (Official brand goods often have different specifications of screws)
2. Touch the temperature difference of the heat sink (there is a problem with the temperature difference > 8℃ after working for 2 hours)
3. Check the driver board number (the serial number of regular manufacturers can be verified on the official website)

Editor's opinion:

Buying a spherical screen is like buying antiques, while laymen watch the fun and experts see the tricks. Remember these three things to buy: don’t buy if the curved seam can be plugged in, don’t buy if the mobile phone has ripple shooting, and don’t buy if you dare not provide a three-year warranty. A truly good screen should do: be able to broadcast 8K videos, withstand typhoon weather, and never fade for ten years!

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