Have you ever seen the advertising screen in the mall that jumps in red, blue and green in turn? Promotional information that changes color at the entrance of the milk tea shop, and countdown to the music rhythm on the gym wall, these eye-wrenching equipment actually hide great knowledge. Today we will talk about the most worrying thing for novices - how to choose and buy LED three-color display screen? Don't worry, I will break it up and tell you the tricks that people in the industry will not tell you clearly.

A friend who runs a gym asked me two days ago: "I have a crush on an LED screen that can change color with music. The merchant said it is a three-color high-brush model. Is this thing an IQ tax? "This made me happy. In fact, choosing a three-color screen is the same as buying running shoes.​ ​Depend on the actual usage scenario​​. For example, if you use it in a gym, the key is to see if the screen will be smashed by dumbbells and whether the color change speed can keep up with the BGM rhythm - this involves hard indicators such as protection level and refresh rate.

The three-color screen has a deeper path than you think

Let’s talk about the concept of “three colors” that is most easily fooled. Some businesses on the market use ordinary full-color screens to pretend to be three-color screens, but in fact​ ​The true three-color screen must be able to independently control the three primary colors of red, green and blue​​. There is a simple way to distinguish it: let the screen display pure red separately, take the phone camera to shoot, and if you can see dense green dots, it is a fake three-color screen. The real thing should be as pure as a burnt iron plate, without any distortion.

Refresh rate should be more serious. ​ ​Don't consider screens below 1920Hz​​, especially in gyms and dance classrooms. Just imagine a member following the countdown on the screen to do wave jumps. If there is a drag on the screen, it can make people sway in minutes. A friend bought a low-cost screen, but the members collectively complained that they were dizzy and finally had to disassemble and reinstall it.

Three hard indicators to look at when buying a screen

1. ​​Brightness adaptability​​: This range of 800-1200cd/m² is the most suitable for indoor use. It is too bright and hurts the eyes, and it is too dark and has no sense of existence. Now the high-end screens have automatic photosensitive adjustment, just like a mobile phone screen, which can adjust the light and dark by itself.
2. ​​Protection level is not a decoration​​: Places like gyms require at least IP54 protection, which can prevent sweat and dumbbell debris. There is a simple test method: use mineral water to pour it into the joints of the screen. If the water droplets flow down the border and do not seep in, this protection is reliable.
3. ​​Installation method determines cost​​: The wall embedded type saves 30% maintenance fee than the column type, but the maintenance port must be kept in advance. The most amazing case I have ever seen is that a chain store uses magnetic installation, and changing screens is as convenient as changing posters.

A guide to avoid pits that experts won't tell you

Let me tell you a real case: Last year, a cafe owner spent 80,000 yuan to buy an "imported three-color screen", and the screen began to shine green during the rainy season. Later, when I opened it, I found that the driver chip was actually an old model five years ago. This teaches us​ ​It must be determined by the manufacturer's production date​​, the chip model must be the latest generation. Nowadays, regular manufacturers will hide their factory information in the QR code, and you can check it out by scanning the code.

Don’t believe in a short check like “three-year replacement” when buying a screen. You have to ask clearly​​Package range includes no lamp bead loss​​. Some merchants play word games, and the motherboard is guaranteed for five years and the lamp beads are only guaranteed for three months. It is recommended to keep an eye on the manufacturer's written statements on the after-sales terms, and it is best to have a case proof - such as whether there is a record of 48 hours of home repair for overseas customers.

How to judge whether the manufacturer is reliable

1. The more certifications, the better.​​Are ISO9001 and CCC valid?​​. There is a local method to check the certificate number on the national certification and supervision platform, which is much more reliable than the copy given by the merchant.
2. Ask them for​​Real-life video of engineering cases​​, don't believe in the renderings. Pay special attention to the pictures taken at night, as the screen should not have brightness faults or color blocks.
3. Try theirs​​Is the 24-hour customer service real person?​​. Once, when I called a manufacturer at 2 a.m., the wiring technician was able to guide the resetting of the driver parameters on the spot. This kind of service is really reliable.

Personal opinion time

To be honest, the three-color screen market is indeed mixed. But we don't have to panic, remember​ ​Choose an old factory than choose a new brand​​, especially those manufacturers who have done overseas projects. You think, if you can pass the Japanese JIS certification and the Korean KC certification, the quality will definitely not be much worse. As I often tell my friends, don’t just compare prices when buying screens, it depends on whether the manufacturer dares to open the production line for you - those who are really confident are welcome to come to the factory to inspect the goods.

Finally, I would like to say my heartfelt words: If you buy the three-color screen correctly, it is a powerful tool to make money, and if you buy the wrong one, it is a money-burning machine. The smartest buyer you have ever met will ask the manufacturer to write it in the contract​ ​Brightness attenuation compensation clause​​For example, if the brightness drops by more than 15% within three years, the lamp beads will be replaced for free. This kind of detail control is the smartness that people who truly know how to live should have.

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