"When I first entered the industry, I was also confused by the parameter list - what are the numbers P1.25, IP65, and 1920Hz used for? "In a science and technology park in Shenzhen, Lao Li, an engineer who has been working for ten years, said while debugging the screen. In fact, reading the parameter table is like a puzzle game. Mastering the key indicators can reveal the strength of the product.

1. The doorway in basic parameters

​​Pixel spacing hides the password for clarity​ ​, for example, P1.25 means that the distance between each lamp bead is 1.25 mm. The smaller this value is, the more delicate the picture will be, but the higher the cost will be. Here’s a little trivia: P1.2-P1.8 is most suitable for conference rooms. You can’t see the graininess with the naked eye from 1 meter away.

​​Brightness adjustment is not as high as possible​ ​, have you ever seen the embarrassment of blinding your eyes when the shopping mall screen lights up? "4000-7500cd/m²" in the parameter table represents the brightness range of the outdoor screen. In a strong light environment like Shenzhen, it is recommended to choose a model above 6000cd/m², and 800cd/m² indoors is enough to protect your eyes.

2. Black technology in core parameters

​​Refresh rate ≥1920Hz​ ​This means that the picture is smoother and there will be no water ripples when shooting the screen with a mobile phone. Here’s a tip for testing: turn on the camera’s professional mode and set the shutter to 1/2000 seconds. A good screen should not be able to capture scanning lines.

​​16bit grayscale​ ​Let the scene in the evening not be blurred into one piece. During the renovation of a gymnasium, engineers deliberately tested the screen at dusk and found that high-grayscale products could retain 73% more dark details.

3. Protection parameters determine life span

​​IP65 protection level​ ​It’s not a decoration. This parameter consists of two numbers – dustproof level 6 (completely dustproof) and waterproof level 5 (proof against low-pressure water spray). Last year during the typhoon season, 30% of the faulty screens in a commercial street in Shenzhen were due to substandard protection.

​​Magnesium alloy box​ ​The secret is that the coefficient of thermal expansion and contraction is low, and actual measured data shows that the life of the aluminum box is 3-5 years longer than that of ordinary aluminum boxes. There is a simple detection method: use an infrared thermometer gun to measure the temperature of the box during operation. If it exceeds 55°C, be alert to heat dissipation problems.

"The last few items in the parameter list are often the most important! "Lao Li pointed to the "24-hour technical response" at the end of the form and said. Really good products will be marked with full life cycle services, from installation angle correction to pixel replacement. Next time you see the parameter table, you might as well turn to the after-sales service section first - behind these numbers is the real strength of the company.

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