When you stare at the bright LED screens in shopping malls, have you ever wondered - what treasures are contained in the bellies of these big, glowing things? Just like taking apart a toy robot to find the battery compartment, today we will act as "display detectives" and turn its parts nest upside down!

1. Treasure map of core components

Open the back cover of the LED screen (of course it is not recommended to actually disassemble it, you will lose money), you will find that it is​ ​Precision electronic building blocks​ ​. The most eye-catching thing is the dense matrix of lamp beads. Each lamp bead the size of a grain of rice contains three primary color chips of red, green and blue. This is no ordinary light bulb, but one that can precisely control brightness and color.​ ​Microluminous body​​。

If you touch down, you will come across a board with a heat sink. This is​ ​The home of driver ICs​ ​. They are like traffic police, directing how bright each lamp bead should be and when it should be on. Have you heard of the 1920Hz refresh rate? This is like the speed of a flip book animation. The higher the value, the smoother the picture, and the driver IC is the key to ensuring this speed.

2. Invisible heroes

Do you think that’s it when you see the glowing part? Too young! The real black technology is hidden in the dark. That iron box with the label "High Voltage Danger" is actually​ ​Power management system​ ​. It can intelligently adjust the voltage. When the outdoor screen encounters strong sunlight, it will automatically increase the brightness to 7,500 lumens, and then quietly drop it to 4,000 lumens on cloudy days. This power-saving feature is even better than your home air conditioner.

If you look in the corner again, you will find a device the size of a USB flash drive.——​ ​receiving card​ ​. This is the brain of the entire screen, responsible for translating video signals into a language that the lamp beads can understand. Nowadays, high-end screens are equipped with dual backup systems, just like computers equipped with two hard drives. If one fails, the other will immediately replace it, ensuring that the screen will not suddenly go black during the concert.

3. Assembly knowledge is more complicated than Lego

Have you ever seen a decorator put together aluminum gussets? LED screen assembly is much more delicate than that. Each display module must be tightly stuck on​ ​Magnesium alloy box​ ​Here, the seams must be controlled within 0.1 mm. Why are you so serious? Because the seams are so big, it’s like a mobile phone with a privacy film on it. When you look at it from the side, it’s all black lines.

Speaking of waterproofing, the parts layout of the outdoor screen is like a raincoat design. components live in​ ​IP65 protection grade sealed cabin​ ​Here, the heat dissipation holes are made into a labyrinth structure. During the typhoon last year, a screen in a business district in Shenzhen was soaked by heavy rain for three days. When I took it apart, it was still dry inside. Do you think this design is absolutely perfect?

4. Maintenance master’s tips for finding parts

Once I went to the scene with a maintenance technician and watched him find the fault point within five minutes. The secret is​ ​Modular design​ ​——The whole screen is divided into several small pieces like a chocolate slab. If there is a problem in any area, the corresponding module can be directly removed and replaced. The master also taught me a trick: "Look at the color!" Yellowed lamp beads should be retired, and driver ICs with uneven colors should be laid off. "

Nowadays, some smart screens are even more exaggerated and can perform "physical examination" on the parts by themselves. Through built-in sensors, the temperature and voltage of each component can be monitored in real time. Once in the mall, the screen suddenly went dark, and an alarm was immediately received in the background, indicating that the No. 3 power supply module was overheating. This was much more timely than waiting for customer complaints.

Personal opinion: Next time you see an LED screen, don’t just take videos and post them on Moments. Think about those small parts hidden in the metal casing. It is the tacit cooperation of these inconspicuous components that makes those cool pictures come to life. To be honest, after understanding this, I looked at the big screen in the mall differently - this is not a display screen, it is clearly an electronic magic box filled with black technology!

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