Are you often in shopping malls, stadiums or concerts and are shocked by those big screens bursting with colors? They are all LED screens, but why do some of them look foggy, while others can even see their hair clearly? Today we will break it up and talk about where the full-color LED display is.

​​▍When it comes to color, the more the better.​​
Friends who are just getting started tend to have a misunderstanding - they think that 16 million colors must be better than 1.6 million colors. In fact, the key is to look at​ ​Color reproduction accuracy​ ​, just like taking pictures of delicious food with a mobile phone, if the colors are too bright, it will look fake. A good full-color screen can achieve ΔE<3 (professional color difference value), which is equivalent to the level of a professional image editing monitor.

To give a real example: I helped a friend choose a store advertising screen last year. The parameters of the two brands seemed to be similar. However, when comparing the actual machines, the strawberries displayed by one were so red that they turned purple, but the strawberries displayed by the other one could distinguish between ripe deep red and freshly picked bright red. Later I found out,​ ​Bin classification of lamp beads​ ​(Color binning) directly determines color consistency. Many merchants do not mark this parameter at all.

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​​▍Brightness adjustment hides a lot of knowledge​​
Outdoor screens often have a brightness of 4,000 to 5,000, so is the higher the better? wrong! Have you ever seen the display screen at the entrance of a shopping mall turn on in the middle of the night? Really reliable products come with​ ​Intelligent light adjustment​ ​, as smart as the phone’s automatic brightness.

The indoor range of 800-1200cd/m² is the most comfortable and can automatically adjust according to the light and shade of the environment. There is a little trivia:​ ​Low brightness and high gray technology​ ​It allows the screen to still show rich dark details in dim environments. This technology is like the RAW format of a SLR camera, retaining more image information.

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​​▍Invisible thresholds in hardware configuration​​
• ​​Refresh rate starts at 1920Hz​ ​: Watching fast-moving racing ads without smearing
• ​​Protection grade IP65 is the bottom line​ ​: Outdoor screens must withstand heavy rain washes
• ​​Box seam≤0.08mm​ ​: There will be no annoying black lines when assembling a large screen

I saw a negative example last month: a dance floor tile screen installed in a gym showed color patches after only three months of use. When I took it apart, I found that the connector was actually made of plastic. Sweat vapor could seep into it and cause a short circuit. So​ ​invisible parts​ ​This is the true test of manufacturers’ conscience.

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​​▍Service is the hard power​​
What are you most afraid of when buying a screen? It’s not that it’s expensive, it’s that no one will care if something goes wrong! Have you ever seen an emergency repair team at three in the morning? Really powerful manufacturers dare to promise​ ​24 hours response​ ​, starting from the project design. For example, when installing a curved screen, the radius of curvature must be considered, and the optimal viewing angle for a stadium screen must be considered. These are impossible to handle without experience.

There is a classic case: the transparent window screen installed in a certain brand’s flagship store always reflected light and made it difficult to see clearly at first. The engineer came to the site with a polarizing film and adjusted the angle for three hours. Now it can be seen clearly even on bright sunny days. This kind of​ ​Practical experience​ ​This is not reflected in the parameter table.

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​​▍Novice’s Guide to Avoiding Pitfalls​​
Q: Which P size is most suitable for me?
A: The viewing distance divided by 1000 is the appropriate spacing (unit: mm). For example, if you look at it from 5 meters away, choose P5, and if you look at it 3 meters away, choose P3.

Q: How can you tell if the manufacturer is really knowledgeable?
A: Let him demonstrate on site​ ​Picture compensation technology​ ​——Quickly switch to a solid color screen to see if there are any flickers or color spots.

Q: What is the difference between rental screens and fixed screens?
A: Focus on the box seam tolerance and lock design. A good rental screen can disassemble and assemble 200 square meters in half an hour.

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The editor has two final words: Choosing a full-color LED screen is like looking for a partner, the parameter is the appearance, and the service is the inner part. Remember to bring a USB flash drive next time you purchase, which can store gradient grayscale images and 4K motion videos. On-site testing is the most reliable. Those merchants who dare not let you test on real machines, say goodbye as soon as possible.

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