Feng Qing’s friend recently wanted to install a two-color LED display. Are you always struggling with where to buy it? I am afraid that the quality of the Taobao shop is unreliable, and I am worried about being slaughtered when I look for local merchants. I understand this kind of trouble very much! Today we will break it apart and talk about this topic, and teach you how to avoid pitfalls that novices are prone to step on. (Writefully, there are exclusive shopping tips at the end of the article)

1. Understand these things before buying

To be honest, buying a two-color screen is similar to buying a mobile phone - you have to know what you want first. For example, do you want to install the scroll notification at the entrance of the village committee, or do you want to display the menu in the milk tea shop? There are so many ways here:

1. ​​Usage scenarios​Determines the protection level. In rainy places like Fengqing, the outdoor screen must be at least IP54 waterproof, while IP43 is enough for indoors.
2. ​​Budget scope​​You have to know what you can do. There are from 2000/㎡ to 8000/㎡ on the market. Don’t just look at the cheap price. Some low-brightness screens can’t read clearly when they are cloudy.
3. ​Technical parametersI have to know how to look at these three items:
   • Brightness: ≥1500cd/m² for outdoor use, 800cd/m² is sufficient for indoor use
   • Point spacing: P10 is suitable for long-distance viewing (such as the large square screen), P4.75 is suitable for store windows
   • Refresh rate: 3840Hz or above will not look dazzling

Some people may ask: "Why are some screens blind during the day and too dazzling at night?" This requires you to choose​Intelligent dimming system​The style of the ​can automatically adjusts the brightness according to ambient light. This function is now basically equipped with mid-to-high-end screens.

2. Purchase channel competition

Now there are three main ways to buy a two-color LED screen:

1. ​Online e-commerce platform​
   Advantages: transparent price, and can also compare prices
   Points: 32% of the actual parameters of the product do not match the page label, especially the protection level is seriously false
   Suggestion: Ask the seller to send a 72-hour aging test video, focusing on the cooling of the power module

2. ​​Local Electronics City​
   Advantages: Can see the effect on site, convenient after-sales service
   Points: Intermediaries make a difference, and the same configuration is 15%-20% more expensive than direct sales of manufacturers
   Real case: The screen bought by a milk tea shop owner in the Electronic City last year, and the color block fault occurred in just half a year. It took one month to repair it.

3. ​Direct sales from manufacturers​
   Here we have to make a point! Find a manufacturer with ISO9001 certification, and it is best to provide a five-year warranty. Many major manufacturers now haveScenario customization service​, for example:

   • For restaurants: Develop a playback system with dish templates
   • For government units: built-in red-headed document display mode
     I have a cold knowledge: the joints of regular manufacturers will be filled with glue, and the waterproof performance will be improved by more than 3 times.

3. This way, you can choose the core parameters without overturning.

It is more intuitive to directly compare the table:

Keywords​Installation method​This invisible pit:

• Magnetic installation looks convenient, but it is easy to fall off in windy days
• The embedded box is the most stable, but the maintenance port must be kept in advance
  A master told me that it is popular now​Quick-mounted snap structure​, the disassembly and assembly time is 80% shorter than the traditional method, and it is especially suitable for stores that need to change locations frequently.

4. Do not pay attention to these risks

I just heard something last month: a clothing store bought a second-hand screen with a cheap price, but it burned it after using a control card for three months. The repair fee is more expensive than buying a new screen! Here is a reminder for you:

1. Must viewThird-party testing report​, focus on anti-vibration test data (requires ≥50G acceleration)
2. The contract must state​Brightness attenuation clause​, for example, the brightness must not be lower than 80% of the initial value within three years
3. Don’t believe in the “lowest price on the entire network”, where the material costs of regular manufacturers are:
   • Aerospace-grade aluminum-magnesium-zinc alloy box is 40% more expensive than ordinary materials
   • Imported driver chips are three times the price of domestic ones

There is a secret that people in the industry know:​View the thickness of the power cord​! The diameter of the power cord of a high-quality screen is ≥1mm, and those using thin wires are basically reduced.

The editor’s last nagging: Buying a two-color LED screen is not a one-time deal, but the subsequent oneSystem UpgradeandContent update serviceMore important. Now some advanced manufacturers have started to play the "hardware + software" package. For example, if you have remote control function, you can modify the display content of Kunming stores in Fengqing. Next time I see the merchant bragging about "imported light beads", remember to ask him for customs declaration form, this trick can screen out 80% of the sellers who fool people!

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