Is Xiaobai, who is just getting involved in LED displays often confused? I bought the equipment that I spent a lot of money, and if I wanted to check the model, it was like playing escape room, and I couldn't find any clues when I searched through my body. My friend made a joke last week - he stared at the back of the display for half an hour and found that the model label was attached to the side slot. Today we will talk about this matter by breaking it apart. Make sure you find a model faster than a mobile phone charging cable in the future!

1. The secret of the model hiding place

​​1. Physical tags are the most common​​
More than 90% of the equipment will carve the model on a metal nameplate, just like a person's ID card. The key point is here——​ ​This iron sign is usually hidden in three places​​：

• Inside the power box cover plate (be careful of electric shock! Power off and then operate)
• The lower right corner of the display frame (squat down and look into the gap)
• The snap position at the box splicing (requires disassembly of the connector)

There is a cold knowledge: the label of the outdoor screen will have an extra layer of waterproof coating, which will feel matte to the touch. Last time I saw an installer on the commercial street, he actually used a lighter to bake a label to confirm whether it was the original parts. Don’t learn this operation!

2. Model numbers hidden secrets

Don't be afraid of the alphanumeric numbers such as P3, P4, and P5. Actually, this is​​Pixel spacing (unit: mm)​​. Take a chestnut:

• P2.5 means that each luminous point is spaced 2.5mm
• The smaller the number, the more delicate the picture
• The larger the number, the more suitable it is to watch from a distance

Here is a comparison table to help you understand:

Notice! Some models have letters on the back, such as the P4-Plus stands for the enhanced version, which is 15% brighter than the standard version. Two days ago, I saw that the screen model of the exhibition hall was GL-1920H. GL represents highlight, 1920 is the refresh rate, and H refers to the outdoor protection type.

3. Hidden channel for electronic query

Now the smart screen has built-in system information interface, just like the mobile phone's "About this unit" page. ​ ​Press and hold the menu key and power key at the same time for 5 seconds​​, an interface containing the following key information will pop up:

1. Firmware version number (judging whether an upgrade is required)
2. Cumulative usage time (second-hand equipment machine inspection tool)
3. Maximum support resolution (anti-overclocking and burning screen)

There is a real case: a brand experience store bought a second-hand screen. When checking the system information, it was found that it had been working for 12,000 hours in a row, and decisively asked the seller to give a discount. This trick is much more reliable than judging the new and old based on the appearance!

4. Paper documents that are easily overlooked

Don't underestimate the paper in the packaging box, there are three treasures hidden here:

• ​​Factory inspection report​​(with engineer signature and inspection date)
• ​​Quick Guide Folding​​(Illustrated version model position description)
• ​​QR code stickers​​(Scan the code to go directly to the electronic manual)

Remind everyone: The model on paper documents may be printed half a month earlier than the equipment, which is a normal production cycle difference. Encountered with "/A" or "/B", usually represents a fine-tuned version of different batches.

5. Cracking methods for special circumstances

If you encounter label wear or system failure, don't rush to scold the street. ​ ​Measurement method​​Can help:

1. Measure out the length and width of the display (unit: meters)
2. Count the number of pixels in the horizontal and vertical directions
3. Use the formula [screen width ÷ horizontal pixel number = dot spacing]

For example, a 2-meter-wide screen has 800 pixels horizontally, and the spacing between the points is 2÷800=0.0025 meters, which is the P2.5 specification. The error of this method is controlled within ±0.2mm, which is enough to determine the overall model range.

After reading these, do you think it’s not that difficult to find a model? Next time you encounter unfamiliar equipment, remember to touch the border first and then check the system. If it really doesn’t work, just measure it. In fact, the model is like the genetic code of the display screen. Only by understanding it can it better exert its strength. Having said that, some high-end screens now support voice query, and you can report the model by shouting "Hey Display" to the screen. The development of technology is really worry-free!

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