Two days ago, the owner of the hot pot restaurant, Lao Li pointed to the quotation and was worried: "What does this NS-P3-4K mean? What's the difference with the HD-M4 from the old Wang family next door? "Today we will teach you how to understand the methods in the model.​ ​Transform into a high-level player in five minutes​​！

Password hidden in letters

The letters at the beginning of the model are not casually made up.​ ​NS stands for product line​ ​, for example, N is a commercial series and S is a special engineering fund. The digital combination in the middle is more particular: P3=pixel spacing is 3mm, and the 4K finger supports 3840×2160 resolution. But be careful! Some manufacturers will hide the refresh rate here, for example, 1920 represents the 1920Hz refresh rate.

For example, if you install P4-7500 screens in a shopping mall, the 7500 is not the price, but the outdoor peak brightness is 7500cd/m². Last year, Seoul Metro Station suffered a loss and chose a screen with a brightness of 4,000, but it was impossible to see the content of the advertisement during the day.

Five must-see death parameters

1. ​​Brightness adjustment range​ ​: For example, 800-5000cd/m² (except for indoor use, 4000 yuan, outdoor use)
2. ​​Grayscale​ ​: 16bit is 30% more expensive than 14bit, but the dark details are 58% more
3. ​​Protection level​ ​: IP65 is the bottom line of outdoor screen (dust 6 level + waterproof 5 level)
4. ​​Module size​ ​: The 500×500mm box is 15% more expensive than the 480×480 because it saves more joints
5. ​​Refresh rate​ ​: Only when you start at 1920Hz can you take clear photos. If you take a picture below this number, you will be corrugated when you take a picture of your phone.

There is a cold knowledge: the models of high-end screens now have T suffixes (such as P3-T), which means that they support transparent display technology, and their transmittance can reach 86%, which is twice as expensive as ordinary screens, but the effect is explosive.

Parameter anti-fraud comparison table

Last year, a stadium in Tokyo bidding, and three suppliers said that their screens could reach a 2000Hz refresh rate. As a result, only one of them actually met the standards - the secret is that the driver IC uses dual-core chips.

Invisible hidden indicators

What you can't write in the model but you have to ask clearly:
✅ ​​Death light rate​ ​: Large factories with monthly output of 10,000 square meters can achieve ≤0.0001%
✅ ​​Repair response​ ​: Does it include 2 hours of remote diagnosis + 48 hours of home visit
✅ ​​Power redundancy​ ​: Dual power supply is 8% more expensive than single power supply, but the risk of power outage is reduced by 90%
✅ ​​Firmware upgrade​ ​: Models that support online updates will be used for five years without losing their time

Do you know? Some models of quick disassembly and assembly screens have Q letters and use aluminum-magnesium-zinc alloy box. Two people can disassemble and assemble 100 square meters in 20 minutes, saving 70% time-saving than traditional structures.

Editor's opinion: Now some manufacturers sell P2.5 screens as P2, but they are bullied that you don't know how to look at the parameters. I will teach you a trick - you need a "Factory Inspection Report", focus on the "pixel center distance" column. Those with an error of more than ±0.03mm are all hooligans! Remember, the model of a good screen is like an ID card, and every alphanumeric has a technical gene!

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