What is the most feared thing for a novice novices who want to buy LED monochrome screens? It’s not that the price is expensive, but that you can’t tell which businesses are bragging at all! I have seen too many tragic cases - the "imported screen" that some people bought for 8,000 yuan was actually a second-hand lamp bead renovation, and some people were fooled to buy an indoor screen that could not withstand the heavy rain, and as a result, it turned out to be "ink painting" on a typhoon day. Today we will talk about something real and teach you step by step to find reliable purchasing channels.

​​Pop cold water first​: Now 70% of the merchants selling LED monochrome screens on the market do not even have production lines. Those who boast about "military quality" and "German technology" may be just small workshops. Want to know the truth? Just look down!

1. First understand what you want

Don't rush to pay! Before buying, you have to figure out these 5 key points:

1. ​Where to use​: Is it sun and rain every day? Or put the warehouse as a notification sign?
2. ​How far?​: Customer station is 3 meters away from the promotional information, and the security booth is 20 meters away from the notification, and the pixel gap is several times different
3. ​What color​: Red, green, blue and white have their own uses, warm red is more eye-catching when catering stores are used, cold white is more clear when hospitals are used
4. ​​Not waterproof​: At least IP65 protection is required outdoors, don’t believe those saying “Just spray some waterproof glue”
5. ​How to change the word​: WiFi remote control is the most convenient, USB flash drives data transmission is too old, 4G remote is suitable for chain stores

Let me give you a real story: Last year, a hot pot restaurant owner bought a screen without waterproofing for cheapness, but the circuit boards were all lost in the rainy season, and the repair fee was even more expensive than buying a new screen! So, the demand is not clear, and it is a pitfall for buying anything.

2. Reliable channels are hidden in the details

Now let’s talk about the key point - where should I buy it? Each of the three major channels has its own tricks:

1. ​E-commerce platform price comparison​
   The advantage is that it clearly marks the price and can also watch buyer shows. But be careful! Many merchants steal installation cases from other companies and teach you a tough trick: ask customer service to send real-time videos, focusing on whether there are splicing seams on the corners of the screen.

2. ​​Physical store inspection​​
   It is of course good to see it, but the store cost is finally added to the selling price. We must be more wary of those sales that are so grand in the exhibition hall but cannot express the technical parameters. They may not even be able to recite the driver chip model.

3. ​​Let’s find the source of production​
   This is the king of cost-effectiveness, but you have to be able to choose real manufacturers. Three hard indicators:

   • Monthly output exceeds 10,000 square meters (only fully automated production line is stable)
   • Dare to reveal the quality inspection report (the aging test starts at least 200 hours)
   • High export ratio (the quality inspection of Japanese and Korean markets is three times stricter than that of domestic markets)

I heard that there are manufacturers who install fence screens for Tokyo stadiums, and they have done 50 rounds of anti-glare tests alone. This level of quality control is not the same as small workshops’ private goods.

3. Life-saving talisman is hidden in the contract

When it comes to signing the contract, his eyes are staring like a bronze bell:

1. ​​Brightness must meet the standard​: 800-1200cd/m² can be adjusted indoors, and 4000cd/m² can withstand the scorching sun
2. ​​Fault response ≤24 hours​: Don’t make a verbal promise, just write the terms in black and white before counting them
3. ​​In exchange within the warranty period​: Those who dare to promise to change the lamp beads for free are really tough

Cold Knowledge: Manufacturers with high export proportions are often more reliable because they have to deal with voltage fluctuations in 110 countries. Just like a factory that installs window screens for a Seoul mall, three years of zero failure rate is the real skill.

4. Installation and maintenance are of particular importance

Buying it back is just the beginning, and these details will still be overwhelming if you don’t pay attention to:

• ​​Don't make do with the power cord​: Use at least 2.5 square copper core wire, and the miscellaneous wires become "fuse" in minutes
• ​​Save space for heat dissipation​​: The rear side of the screen is at least 20cm away from the wall, and the high temperature is the number one killer of LEDs
• ​Regular cleaning​: Use a soft brush to sweep once a month. If too much dust accumulates, it will affect heat dissipation and electricity.
• ​​ Check frequently on heavy rains​: Even if IP65 is protected, you have to check the junction box after raining for three consecutive days

The most outrageous case I have ever seen: A milk tea shop puts a screen next to a range hood, and the screen is covered with oil stains in less than half a year, and sparks are directly short-circuited when cleaning!

Editor's opinion

When buying LED monochrome screens, don’t try to be cheap! Some merchants have ridiculously low quotations and may use second-hand lamp beads to refurbish. Remember the three-character formula - look at the factory, pick up parameters, and focus on after-sales service. From solution design to installation and maintenance, there is a channel for technical teams to support you in the whole process, so that you can sleep peacefully at night. Next time someone will yell with you that "our screen is the same as the big brand" and directly criticize him: "Do you dare to take me to the workshop to count the production line?"

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