Alas, everyone, come here! Have you ever had this kind of experience - want to buy an LED screen, and look at the dense numbers on the parameter table, and it feels like you are reading a heavenly book? What are the refresh rate, brightness uniformity, grayscale levels, are these numbers real skills or smoke bombs? Today we will take a look, and we will ensure that you can compete with the manufacturer's technician after reading it!

1. The twists and turns in brightness parameters

Let me ask a heart-wrenching question first: Why are the two screens marked with the same brightness of 5000nit in the mall so different? There is a key indicator here called​Brightness uniformity​. Take a look at it, it is like the "yin and yang screen" on a mobile phone screen. Some areas are dazzlingly bright, while others are as dark as if they are not turned on.

​​To see the brightness, you need to look at three numbers:​

• The highest brightness (such as the outdoor screen can withstand the noon sun)
• Minimum brightness (it will be blind if you use it too bright in the conference room)
• Uniformity (industry standards must be >90% to be considered qualified)

There was a chain convenience store that suffered a loss. The screen installed was seriously reflective during the day. Later, the test found that the uniformity was only 78%. Remember,​Intelligent adjustment of brightness range 800-7500cd/m²​This is the real skill, and a good screen can be automatically adapted to the light of the morning and evening.

2. The refresh rate of moisture can raise fish

Nowadays, manufacturers love to 3840Hz ultra-high refresh, but the way here is deep. Just like taking videos on a mobile phone, it is marked with 4K image quality, but it may actually be framed. I really need to look at the refresh rate, I will teach you a local method-​​Photo with your phone in slow motion​, the real ability is not to have horizontal lines.

A performance company fell into trouble: the screen I bought was marked with a 1920Hz refresh rate, and as a result, the camera was covered with rainbow patterns. Later, when the machine was disassembled, it was found that the driver IC cut corners and the actual effective refresh rate was less than half. So the key point is​Effective refresh rate ≥1920HzDon’t be fooled by fancy numbers.

3. Protection level is not a digital game

Everyone can beat the IP65 standard, but the actual protective effect is worse than that of the Pacific. Let me give you a real case: the fenced screen installed by the beach is also marked with IP65. Some are rusted in half a year, while others are still the same as new after three years. The mystery isSealing processand​Heat dissipation design​​。

​​Focus on these details:​

• Is there a three-layer seal for the box joint?
• Is the heat dissipation hole a maze structure?
• How many hours have the salt spray test been done in the surface treatment?

There is a gymnasium screen that is so cool. After typhoons and heavy rainstorms, when you disassemble it, you will see that the interior is as dry as a desert. This kind of real skill will not be written on the parameter table!

4. After-sales service is hidden on the back of the parameter table

This is the easiest to ignore! No matter how beautiful the parameter table is, it will be useless if no one cares about the problem. Teach you three tricks to distinguish between true and false:

1. Ask clearly​Response time​Is it true 24 hours (some say it is 24 hours, and you call you in the middle of the night and ask you to wait for work)
2. See​Modularity​, can I change the light beads like changing the battery
3. CheckCase library​, are there any successful projects in the same scenario

The arc screen installed in a shopping mall failed, and the manufacturer came to the scene with a backup module in two hours. This strength is more real than any parameter. Remember,​Full life cycle technical support​​is the real guarantee.

5. Hidden test points for special scenes

Want to have some fun work? Creative products such as transparent screens and floor tiles screens must be opened wide:

• ​Transparent screen​It depends on the balance between transparency and display effect (suggested ≥86%)
• ​Floor tiles screen​The load bearing and anti-slip coefficient must be measured (it is awesome for a dancer to fall)
• ​​Lease screen​Focus on the weight of the box (the aluminum-magnesium-zinc alloy is 30% lighter than ordinary ones)

There is a bar-mounted dance floor tiles screen that can not only broadcast cool light shows, but also withstand the disco of hundreds of people. This is the real ability. These special parameters are often hidden on the last page of the product manual.

Editor's point of view: It's like looking at the parameters of blind dates. You can't just listen to the matchmaker's bragging, you have to look at the actual ability to live. Those who dare to spread the laboratory data to you, who can provide real case videos, and are willing to sign a performance guarantee agreement are truly reliable. Remember, the good screen can speak by itself, the parameter table is just an entrance ticket, and the real competition is in the invisible details!

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