Alas, are you also worried about buying LED scrolling screens? Have you ever seen a case where the screen display effect is shattered and it will crash after using it for two months? Or are you confused by the quotations online that range from hundreds to tens of thousands? Don't rush to place an order first, listen to me talk to you about the tricks of this industry.

1. Three hard indicators that must be understood before purchasing

​​The first question: How to choose the screen size and pixels? ​ ​
This thing is not the bigger the better. Have you ever seen the subtitle screen installed in front of a convenience store? Usually 1-2 square meters are enough. But if the pixel density is not enough, it will look like a mosaic when you look at the words three meters away. ​ ​It is recommended that novices remember this formula: viewing distance (meters) × 0.3 = minimum pixel spacing (mm)​​. For example, if you look at the screen 5 meters away, it is most suitable to choose the P1.5 specification.

​​The second pit: brightness adjustment is not smart​​
Some businesses boast about the ultra-high brightness of 8000cd/m², but the brightness inside the room is dazzling. actually​ ​Indoor screen 800-1200cd/m², outdoor screen 4000-5000cd/m²​​Totally enough. The key is whether there is an automatic photosensitive function - the brightness of the morning and late night can be automatically adjusted by more than 30%.

​​The third minefield: after-sales response speed​​
The most outrageous case I have ever seen: the screen of a restaurant was black on the day of the event, and the supplier's phone number was actually transferred to the voice mail. ​ ​Focus on these three points:​​

1. Do you promise to come to your door within 24 hours
2. Control whether software upgrades are charged
3. Module damage replacement cycle

2. The water depth of the procurement channel shallow water

Now there are so many online and offline channels that are so dazzling, let’s talk about it:
▸ ​​E-commerce platform:​​ The price looks attractive, but when you meet an OEM middleman, you can get a 40% increase in the price when you change the hand. Last year's industry survey showed that the complaint rate of LED screens on a certain platform was as high as 23%, and the main problem was the false label parameters.
▸ ​​Wholesale Market:​​ It can be seen on site, but many stalls are second-hand dealers. A friend bought a screen at the stall. After three months, he went to find someone and found that the stalls were replaced by surveillance cameras.
▸ ​​Direct sales of the manufacturer:​​ This is the most stable, but you need to pay attention to identifying the authenticity. Teach you a trick - let the sales site video link production workshop, and you can see the automated production line and quality inspection process only reliable

​​Price comparison reference (taking P3 specification 1㎡ as an example):​​

3. Hidden skills for installation and maintenance

Buying it back is just the beginning, and how to install it well and use it for a long time is the key. Last week, a milk tea shop owner complained to me that the screen would appear after half a year of use - and later I found that there was no room for cooling when installing it.

​​Installation three:​​

1. Don't install it in direct sunlight (it will accelerate the aging of the lamp beads)
2. Don't save those hundreds of dollars in bracket money (I've seen the glass door being blown down by the wind)
3. Don't connect the circuit by yourself (the maintenance fee is enough to buy half a new screen if the control card is burned)

​​Daily maintenance cold knowledge:​​

• Use a soft brush to clean the dust every week, which lasts 2 years longer than that of a wet cloth
• Turn on for 2 hours a day during the rainy season, which can prevent moisture corrosion
• I found that a single lamp bead was not lit, and reporting repairs within 72 hours can save 80% of the repair cost

4. Soul interrogation session

​​Q: Everyone says you want to buy high refresh rate. Is the difference between 1920Hz and 3840Hz really that big? ​ ​
A: Let’s put it this way, if you take a 1920Hz screen, there will be a scan line vaguely, but if you take a 3840Hz screen, you will be completely invisible. If used on stage or live broadcast scenes, spending 20% of the extra money is absolutely worth it.

​​Q: Is it an IQ tax for customized special-shaped screens? ​ ​
A: It depends on the specific needs. For example, the circular screen commonly used in cafes, the customization fee is 35% more expensive than the standard screen, but the passenger flow can be increased by 18%. If you use it in ordinary stores, it is more cost-effective to choose square screens honestly.

​​Q: Can you buy a second-hand mobile phone? ​ ​
A: Experts all know that second-hand screens depend on the cumulative usage time. If you use the screen for more than 10 hours a day, even if the appearance is new, the life of the lamp beads will be reduced by more than half. There is a simple way to judge: after turning on the computer, the full white screen will be displayed, and if the brightness is obviously uneven, pass it immediately.

After all, buying this thing is like finding a partner - just looking at a good appearance, it also depends on your inner strength. Those manufacturers who dare to show you real photos of the production workshop and can provide a five-year warranty are truly confident. Next time I saw the salesperson who was boasting, I asked him directly: "Do you dare to sign a performance guarantee agreement on this screen? "It is guaranteed to be able to screen out a large number of unreliable ones.

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