Alas, recently people always ask me if I want to create an LED three-color scrolling screen. Where should I buy it? This thing looks simple, don’t rush to take out your wallet when you really want to do it! Let’s talk about this today, and we will ensure that you can hear it clearly.

1. First understand what a three-color scrolling screen is

To put it bluntly​ ​Red, green and blue three primary color LED​ ​The display device is composed of which can scroll the playback of text and simple patterns. Although there are many ways to go here now. For example, the red screen at the door of the convenience store that displays "Today's Special Offer" and the green shift information scrolling in the subway are all application scenarios of this thing.

​​You have to know the three core characteristics:​​

• ​​Power-saving expert​ ​: Save more than 60% of power than full-color screens
• ​​Install like building blocks​ ​: Modular design, can be used when put together
• ​​The way to see clearly is​ ​: You can see the words clearly outside 30 meters away on sunny days

2. How to choose the most reliable purchasing channel?

Now buying this thing is like ordering takeaway, with many channels that are dazzling. Let's talk about the situation:

1. ​​Offline physical stores​ ​: Suitable for impatient, visible and tangible, but the price is generally around 20% more expensive
2. ​​E-commerce platform​ ​: There are many styles and prices, but be careful of refurbishing goods (don't ask me how I know)
3. ​​Direct sales from the manufacturer​ ​: The most cost-effective, but it depends on the manufacturer's qualifications

Here is a real case: A friend of mine bought a screen on a platform with cheap pictures, but after using it for three months, "Yin Yang Face" appeared - the left side is bright and the right side is dark. Later I found out that it was renovated with second-hand lamp beads. Do you think it’s a trick?

3. Can’t understand the parameters? Just remember these three points

Novice reading parameter tables is like reading a book of heaven. In fact, it is enough to grasp these key points:

• ​​The brightness must be tough enough​ ​: 800-1200 nits indoors, 4000 nits outdoors
• ​​Don't change the refresh rate​ ​: 1920Hz is the bottom line, otherwise you will be dizzy when you look at it
• ​​Protection level depends on the environment​ ​: At least IP65 waterproof and dustproof for outdoor use

Give you the entire comparison table more intuitive:

4. Don't be careless after-sales matters

Buying a screen is not a one-time transaction, it is like buying a mobile phone, and after-sales service is the real guarantee. Focus on these points:

• ​​Warranty period​ ​: Industry standards start from one year, those who dare to give three years are ruthless characters
• ​​Repair response​ ​: It is true that those who come to the door 24 hours a day, and those who only talk but don’t practice are passing as soon as possible
• ​​Accessories Supply​ ​: Ask if you can still buy replacement lamp boards in five years

Last year, there was a shopping mall project in Southeast Asia, and the heavy rainstorm shorted the screen. Fortunately, the manufacturer kept the spare module and completed the replacement in 2 hours. This matter would have to be put on some small workshops, so it would probably have to be left there for half a month.

If I ask me, buying this kind of industrial-grade equipment is like finding a partner——​ ​Don’t just look at the face (price), you have to look at the inner (quality) and responsibility (after-sales service)​ ​. Especially for novice friends, remember this sentence: expensive ones may not be good, but cheap ones must have problems! Next time someone will fool you with "special price" and you have to highlight your eyes. By the way, don’t buy uncertified parallel goods with cheap prices, and you can’t find any adjustments to cry at that time!

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