Do you often ask questions when you stare at the various LED screen advertisements on your phone - what does the merchant mean by "P2.5 spacing"? What are the key points to look at in the dense parameter tables on the brochure? Why can the same size be several times the price difference? Don’t panic, today we will understand these secrets hidden in technical parameters.

Two days ago, I helped my friend look at the conference room display screen, and the sales consultant threw over more than 20 technical indicators. From refresh rate to color gamut coverage, people's scalp is tingling. Later, during a field inspection at the factory, the master pointed to the assembly line and said the truth: "The parameters are not used to view them, they are used." This sentence made me suddenly realize—​The meaning of the existence of parameters is to help us determine whether the device can meet actual needs.​。

​​ Let me first talk about a few of the most frequently asked indicators​​：

1. Pixel spacing (such as P2.5): The smaller this number, the more delicate the picture, but pay attention to the viewing distance. Just like a mobile phone film, you can only see the difference between a 2.5D curved surface and a normal film when you are close.
2. Brightness range: 800-1200 nits of the indoor screen is enough, and 4000 nits of the outdoor screen must be started. I remember that last summer, there was a shopping mall with large screens at noon that couldn't see clearly, but the brightness did not meet the standard.
3. Refresh rate ≥1920Hz: The higher this value, the less scan lines appear during shooting. Last time I watched the live broadcast of the concert, the water ripples on the big screen on the stage were a loss.

Once when I went to Electronics City, the store pointed to a screen priced at 30,000 yuan and said to me, "This is military-grade quality." I looked carefully at the parameter table and found that the protection level was only IP54, and I couldn't even do basic dust protection. So say​The parameter table is like a physical examination report. It is useless to just listen to sales bragging. You have to look at the key indicators yourself.​。

Now the problem is-​​Where are these life-saving parameters hidden?​？

• Technical specifications list on pages 3-5 of the product manual (note to small notes)
• The "Technical Parameters" section of the official product details page (Beware of those websites that make parameters into pictures)
• The nameplate marking behind the fuselage (especially safety parameters such as voltage and power consumption)
• Tested data in the test report (recognize the CNAS or ILAC certification seal)

I encountered an interesting case: a chain supermarket changed the advertising screen. The original screen parameters looked pretty beautiful, but there was always a color difference after installation. Later, the technical team found that the color temperature parameters were not adjusted correctly, and 5500K and 6500K seemed to be only a number different, and the actual effect was very different. So​The parameters should not only look at the values, but also the matching degree of the application scenarios​​。

The easiest pit for beginners to fall in is "parameter worship". Once, a customer insisted on buying the highest brightness screen. After installing it into the dim exhibition hall, the customers said that their eyes hurt. It's like installing a searchlight in the bedroom—​​As long as the parameters are enough, the best one is suitable​。

Speaking of this, you may ask: Then what parameters should I focus on? Based on my experience in struggling in the industry over the past few years, I have compiled a simple comparison table:

Recently, a friend was planning to start an e-sports hall and was puzzled about which screen to choose. I asked him to focus on the response time and refresh rate, and as a result, he saved 30% of the budget and improved the experience. So say​Understand parameters are like mastering the customs clearance password, which can help you avoid many detours when purchasing​​。

However, be aware that some parameters are in word games. For example, the data "Contrast 16000:1" has dynamic contrast and static contrast. The actual effect of a poor prefix may be compromised in half. At this time, you should look at the origin of groceries.​Cleanly confirm the specific test standards for parameters​​。

Finally, let me talk about cold knowledge: the technical support hotlines of many major manufacturers can actually interpret parameters for free. Last week, a restaurant owner wanted to change the menu screen and called the manufacturer 400 to find out several key indicators, saving the price difference between finding middlemen. So don’t be shy when you are confused about parameters. Ask if you should ask - after all, you spend your own money, so you have to buy something clearly.

Editor's opinion: The parameter table is not a heavenly book, but a device instruction manual. When looking at the LED screen parameters next time, remember three key points -​Look at the scene requirements, actual measured data, and certification marks​. If you really can't get it, you can take the use of the environment photos to consult a professional. After all, the cost of installing the wrong screen is much more expensive than the consultation fee.

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