Why is it so difficult to buy an indoor LED screen these days? Last month, I helped my friend see the equipment, and the good guy - I was dizzy when I saw the parameters, there were quotations ranging from thousands to hundreds of thousands, and there were a set of sales rhetoric. Today we will break it apart and chat,​How to choose a large indoor screen so as not to get stuck​？

1. First understand: What kind of screen do you need in your home?

A boss who runs a gym asked me two days ago: "What do P2.5 and P3 written on this display parameter table mean?" To put it bluntly, ​​The numbers behind P represent the spacing between the two lamp beads (units mm)​, the smaller the number, the more refined the picture. for example:

• Conference room/classroom: Choose P2.5-P3 (3 meters outside without graininess)
• Shopping mall atrium: P4-P6 is more economical (viewing distance is more than 5 meters)
• Jewelry Counter: P1.25-P1.8 (it is clear when you look close)

Here is a misunderstanding:​Not the higher the resolution, the better​! I have seen a brand exhibition hall that insists on using 8K screen to broadcast 1080p film sources, but the picture quality is not as good as that of ordinary 4K screens. Three key points:

1. The matching degree of screen size and viewing distance
2. Content source clarity level
3. Changes in light and darkness of ambient light

2. Purchase skills that experts know

Now let's talk about the key points-​How to find a reliable supplier​? I will teach you three tricks:

1. ​​Depending on production strength​
   Going to the factory workshop is better than anything else. The key point is:

• Is there a dust-free workshop (dust will cause the screen to die)
• Is the quality inspection process strict (we have seen that each module in a certain factory has to undergo 72 hours of aging test)
• What is the monthly production capacity (check for small workshops less than 5,000 square meters)

1. ​Compare technical parameters​
   Don't be fooled by fancy functions, these are the core indicators:

• ​​Refresh rate ≥1920Hz​(Avoid water ripples when taking pictures)
• Intelligent brightness adjustment (800-1200cd/m² interval is sufficient)
• Grayscale level ≥16bit (the screen gradient changes naturally)

1. ​Check service guarantee​
   Last year, a customer looked for a middleman with a cheap picture, but the color blocks appeared after the screen was installed for three months, and the manufacturer had already run away. So it must be confirmed:

• Whether to provide installation instructions
• Is there a 24-hour technical response?
• Does the warranty period include lamp bead loss

3. The most easiest details to ignore during installation

Last week, I went to inspect a conference room project and found these tricks. Don’t step on it:

1. ​​Heat dissipation design​​
   The most outrageous installation ever seen: stuff the control cabinet into a sealed decorative wall! As a result, the high temperature in summer leads to the color shift of the screen. The professional approach is:

• Reserve more than 20cm of heat dissipation space
• A temperature-controlled fan is installed for every 5㎡
• Avoid direct sunlight on the back of the screen

1. ​Power Planning​
   Never share a circuit for all modules! The screen flashed on the day of opening of a shopping mall, and it was found that the voltage was unstable. suggestion:

• Independent power supply per 10㎡
• Equipped with a voltage-regulated power supply
• Ground resistance ≤4Ω

1. ​Content adaptation​
   Don't use the video source on your phone directly! 4K screen broadcast 720p video is like watching a mosaic with a magnifying glass. The professional plan should be:

• Custom resolution content source
• Configure professional video processor
• Regularly calibrate color to keep color accurate

At the end of the day, buying an indoor LED screen is the same as decorating a house—​The money saved in the early stage must be doubled later​. A case I have handled: the customer spent 30,000 more to choose a good power supply, but he has not changed the accessories in five years; the other one saved 10,000 yuan in cheaper prices, but in the end, he spent 80,000 yuan in three years of repair costs. Remember,​A good screen can talk, but bad screen can kill people​. Next time I see those display screens with transparent pictures and bright colors, I remember that they are all the effects of professional teams from selecting materials to installing them.

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