Friends who have just bought an LED display screen, do you often worry about the dark screen? Just like my neighbor Lao Wang last week, I couldn't find the model number of the newly purchased display screen, and I was so anxious that I almost took apart the casing. Today we will talk about this seemingly simple problem that drives countless novices crazy.——​ ​Where is the display model number printed?​​？

1. Common hiding places of model locations

Let’s start with a little trivia: 87% of LED display models now have model logos not on the front! It’s right to remember these three golden positions:

1. ​​Inside metal frame​ ​: Especially in the lower right corner, you have to squat down and look sideways.
2. ​​Next to the power interface​ ​: Some models will be laser-marked near the socket.
3. ​​Back of control box​ ​: Remove the dust cover of the signal receiver to see
   To give a real case, on the production line of an industrial park in Shenzhen, a technician taught a trick - use the flash of a mobile phone to illuminate the frame diagonally, and the hidden model code can be seen in the reflection. This method has been tried and tested in the test workshop, especially when processing orders exported to Japan and South Korea.

2. Treasure hunting guide for special models

If you have ever seen the giant display screens in stadiums, you know how exciting it is to find models. This type of equipment is usually identified in three ways:

• ​​Segmented labeling​ ​: Each module has an independent number and must be assembled like a puzzle.
• ​​electronic label​ ​: Scan the QR code to retrieve complete device information (this is what high-end models do now)
• ​​covert etching​ ​: You need to use a special decoder to read it.
  There was a joke at a concert last year. During equipment maintenance, the model of the main screen could not be found. Later, it was discovered that it was revealed by shining a UV pen on the back of the box. This patented technology has now become an industry standard and is said to be able to effectively prevent model information from being tampered with.

3. New query posture in the digital era

Now young people no longer have to lie on the floor looking for models! Try these three tech-savvy methods:
① ​​Mobile phone NFC sensing​ ​: Automatically pop-up information when approaching the device control box (requires Android 9.0 or above)
② ​​Cloud query​ ​: Enter the device serial number to directly retrieve the file
③ ​​AR recognition​ ​: Scan any position on the screen with a specific APP
Here is an industry trend: a laboratory of a Greater Bay Area company is testing​ ​Voice wake-up function​ ​, shouting "Model Query" to the screen will provide voice broadcast. This technology is expected to be mass-produced next year, and by then finding the model will be as easy as asking Siri about the weather.

4. Emergency plan for model cannot be found

If you really encounter "three no products", don't rush to criticize, follow this process:

1. ​​Measure pixel spacing​ ​: Use a ruler to measure the distance between the centers of adjacent lamp beads (unit: mm)
2. ​​Record power parameters​ ​: Input voltage and power consumption data can infer the model range
3. ​​Take a photo of the control card​ ​: The motherboard chip determines the compatible model
   Last week, I helped a friend identify a second-hand screen. Based on the "5V/40A" parameters on the power supply label, it was determined to be a modified model of a certain brand's P4 model. This method is a special skill of old masters in the maintenance circle.

At the end of the day, I think the model logo is quite interesting. You see, the equipment 20 years ago wanted to have the model number printed all over its body, but now it is playing hide and seek. To me, this just shows that the industry has made progress.——​ ​A good design must ensure that professional information can be traced without damaging the aesthetics of the equipment.​ ​. Just like when we wear clothes, we don’t sew the size tags on the cuffs. The model identification on the display screen also needs to be "hidden but not hidden."

Next time you encounter the problem of finding the model number, you might as well think about it from another angle: maybe this is an anti-counterfeiting code designed by the manufacturer! After all, in this era of counterfeit goods on the streets, being able to hide the model just right can be regarded as a different kind of confidence in the quality of the genuine product, right? Do you think this is true?

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