Alas, are you all worried about this? Someone in the circle of friends sold "break-priced LED screens", and a Taobao store boasted that it would not be bad for ten years, but the screen that a friend just bought was spent after using it for three months. Today we are like dismantling our mobile phones, and we will make the twists and turns here clear for you.

1. Online VS offline purchasing channels are in chaos

Last week, I encountered a case of laughter and crying: the restaurant owner spent 30,000 yuan to buy a "high-end imported screen" on a certain platform, and found that it was a refurbished product. Let’s first talk about the pros and cons of each channel:

Key points:The most stable operation I have ever seen is to view the production line with video connection​​, manufacturers who can see the assembly line quality inspection process in the mobile phone lens are more effective than any promise.

2. Four songs of expert screen recognition

1. ​​Touch your bones and see your eyes​

   • New screen border chamfered smooth burr-free
   • Module seams ≤0.5mm (cannot be plugged into the business card)
   • The back circuit board prints clearly

2. ​​Electricity test​

   • No yellow spots under pure white picture
   • Play fast motion screen without dragging
   • Take a cell phone without ripple flashing

3. ​Check the verification document​

   • CCC certification number official website can check
   • Warranty card stamp
   • Customs declaration form corresponds to screen batch

4. ​Stress tests​

   • Play 4K videos continuously for 12 hours
   • Module temperature <55℃ (palm test method)
   • Sudden power outage and restart without any fault

Last year, I found a detail when I was inspecting the goods in the mall:​The control cards of regular manufacturers have independent numbers​, just like the IMEI code of a mobile phone, it can check the production date and quality inspector.

3. Text games in technical parameters

Novice are most likely to be fooled by these parameters:

• ​"High Definition Screen"​: Actually, it may refer to 720P instead of 4K
• ​"Imported Light Beads"​: It may be a foreign packaging domestic chip
• ​"Extra-long life"​: refers to theoretical value rather than actual use

Hard indicators that really need to be focused on:

• ​​Refresh rate ≥3840Hz​(The screen of the mobile phone is not flashing)
• ​​Grayscale level ≥16bit​​ (See whether the sunset gradient is smooth)
• ​​Protection level IP65​​ (must-have outdoor screen)
• ​​Automatic brightness adjustment​(The key to saving 30% of electricity)

A real lesson: A gym didn’t pay attention to the color temperature parameters, and the portrait’s skin turned blue, and members all said it seemed like they had entered a haunted house.

4. Service is the bottom line

Buying screens is not a one-time deal.​After-sales response speed is ten times more important than price​​：

• 24-hour technical support (someone is in charge of the black screen in the middle of the night)
• Remote diagnostic system (discover potential failures before you)
• Spare parts warehouse radius ≤200 kilometers (maintenance is not overnight)
• Operation training service (teachable to independent debugging)

Let me tell you a heartwarming case: Water is in the screen in a shopping mall on Typhoon Day. The manufacturer's technology took the high-speed train to the scene for 3 hours and was repaired before opening.

Editor's opinion time

After more than ten years of engineering installation, I think choosing an LED screen is like finding a marriage partner - appearance (display effect) is important, but character (quality stability) is more important. Three special reminders:

1. ​​Don't save money on installation and debugging(Seeing a million-level screen that has been installed in a wavy shape)
2. ​​Manufacturers with monthly production capacity of over 10,000 yuan are more reliable(It can produce big things without cutting corners)
3. ​​Brands with a high export share are worth choosing​(Foreign quality inspection standards are more stringent)

Finally, let’s see the inside story of the industry: those manufacturers who dare to promise to "replace lamp beads for three years" often use self-developed chips, and the cost is 40% lower than that of a general solution. This is the real ability!

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