"Hey, why are some of the LED screens on the streets of Shidian dazzlingly bright and some look like mosaics?" Boss Zhang, who just opened a hot pot restaurant, stood at the intersection of Renmin Road and scratched his head. Don’t laugh, everyone, there are so many ways to choose LED electronic screens! Today we will break it apart and talk about what should we pay attention to when buying a reliable full-color LED screen in Shidian.

▎First understand: This thing is not bigger, the better

Many novices ask "Give me the largest piece of the whole piece" as soon as they come up, but after installing, they find that the pixel particles can be played as mahjong. Remember three golden formulas:
​​Sight range (meters) × 0.3 = Optimum point spacing (mm)​
Take a chestnut:

• Hotpot restaurant door (visual distance 5 meters) → choose P4 screen (5×0.3=1.5mm≈P1.5, but actually choose P4 more economical)
• Shopping mall atrium (10 meters sight distance) → P6-P8 is the most suitable
• Don't learn from the milk tea shop in Cultural Plaza. It has a P10 screen with a 5-meter visual distance, and the menu text is pasted into a QR code.

▎Can you buy good products locally in Shidian?

Let’s talk about the conclusion first: Yes! But you have to be able to pick. Now many large manufacturers have service points in Yunnan, so pay attention to these three hard indicators:

1. ​Production Qualifications​: ISO9001 certification is the bottom line (just as restaurants need a sanitary license)
2. ​Quality Inspection Report​: Required to view 48 hours of high temperature and high humidity test records
3. ​​Case shooting​: Don’t believe in the renderings, directly connect to the video to view the installation site

Last year, the owner of a homestay in Tengchong looked for cheap things and bought an uncertified screen. As a result, the screen was full of "snowflakes" as soon as the rainy season arrived, and the maintenance fee was even more expensive than the screen.

▎Buy online vs. offline, which one is more reliable?

Let’s draw a comparison table and understand:

It is recommended that novices go offline to view the prototype, remember the model and then compare the price. I have met a smart boss lady who found out the model at the exhibition and saved 20,000 yuan when placing an order in the official mall.

▎The installation location hides great questions

Installing the wrong place turns into "light pollution" in minutes. These three locations are the safest:

1. ​​Office advertising space​: Choose the brightness of the outdoor screen to be ≥5000cd/m², and tilt 15° to prevent rain
2. ​Indoor display wall​: Use P2.5 small spacing, remember to install a sunshade
3. ​Stage background​: You must select a high refresh rate (≥1920Hz), otherwise the screen will flash during live broadcast.

Last year, Shidian Fire Dragon Festival learned a painful lesson - a businessman installed screens under the shade of a tree, and could not see the content clearly during the day, and was forced to turn on the maximum brightness throughout the day, and the electricity bill was directly doubled.

▎Hidden tips for maintenance

Buying a screen is not a one-time deal! Remember these three life-saving tips:

1. ​​Digital cleaning should be diligent​: Use a vacuum cleaner to clean the gaps of the module every month (remember to power off operation)
2. ​​Moisture-proof during rainy season​: Turn on the machine for at least 2 hours a day to drive away the moisture
3. ​​Parameters to be backed up​: Remember to export the configuration file before system upgrade

The most outrageous thing is that there is a KTV. The waiter mistakenly pressed the factory reset, and the color parameters were all lost, and the private room screen was as blue as the underwater world.

Personal experience of trapping

After eight years of struggling in the industry, I have learned three lessons from bloody and tears:

1. ​​Don't save money on control cards​: I have seen a second-hand control card burning the entire screen, and the repair fee is enough to buy three new cards
2. ​​Power cable should be reserved​: Thermal expansion and contraction may cause the wire to break, leaving an additional 20% margin
3. ​​The contract must be written with pixels​: Some merchants sell virtual pixels as real pixels, and the actual resolution is discounted in half

Recently, I met a smart boss who asked the manufacturer to state in the contract that "the bad point rate is <0.01%". When receiving the goods, he held a magnifying glass to score points, and asked the manufacturer to change three modules.

After all, buying an LED screen is like finding a partner - you can't just look at the appearance, you have to find out the background and look at the after-sales service. Now many manufacturers support 7-day no-reason test machine, and they can return it if they are not satisfied after installing it. This must be written into the contract! When visiting Shidian Night Market next time, pay more attention to those screens that are comfortable to light and delicately screened. Maybe it is the solution of a regular manufacturer.

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