Hey, I heard a true story recently - there was a clothing store owner in Mouding who spent 30,000 yuan to install an LED screen last year, but customers kept saying they felt dizzy. Later I found out that I had bought a knock-off product with a refresh rate of only 960Hz, which was flashier than an old-fashioned fluorescent lamp. Today, I’m going to tell you a little bit about the details here for the novices who want to buy a display screen in Mouding.

1. Let’s clearly distinguish between LED and LCD screens.

Someone asked me two days ago: "Are those large screens in shopping malls on the street LED or LCD?" "This problem is like not being able to tell the difference between a pineapple and a pineapple. Simply put:

• ​​LED display​ ​: Composed of countless small light bulbs, suitable for long-distance viewing (square advertising, stage background)
• ​​LCD screen​ ​: It’s like a TV screen at home, suitable for close-range display (checkout counter, display cabinet)
• ​​LED LCD screen​ ​: This statement itself has problems! Either it’s an LED-backlit LCD screen, or the merchant is confusing the concept.

To give a practical example: the curved advertising wall in Mouding Pedestrian Street can be seen clearly from ten meters away at night. It is a P4 LED screen.； The price list displayed on the counter of the milk tea shop is actually a 55-inch LCD screen.

2. Five pitfall avoidance guides when purchasing

1. ​​Don’t be too bright​ ​: 800-1200 lumens is enough for indoors (similar to the maximum brightness of a mobile phone screen), and 4000 lumens for outdoor use.
2. ​​Refresh rate needs to be measured​ ​: Use the slow-motion mode of your mobile phone to shoot the screen. Only if no black scanning lines appear on the screen does it meet the standard.
3. ​​The protection level depends on the letter.​ ​: IP65 is the basic configuration (can resist splashing water and dust). For seaside shops, IP68 is required.
4. ​​Pay attention to the details of warranty terms​ ​: Only the warranty that includes lamp bead replacement and control system upgrade is considered a true warranty.
5. ​​Installation qualifications need to be checked​ ​: When working at heights, you must see the construction company’s "Special Operations Operation Certificate"

When the Mouding Stadium was renovated last year, the contractor failed to check the installation qualifications. As a result, the construction team welded the steel frame 3 centimeters crooked, causing the entire screen to be redone for half a month.

3. The price is so tight

Let’s look at the group comparison data first:

There is an industry formula: Reasonable total price = material cost × 1.6~2.0. If the quotation is lower than this coefficient, either second-hand refurbished parts will be used, or a "technical guidance fee" will be charged during installation.

4. Special precautions

• ​​Approval procedures​ ​: For outdoor screens exceeding 5 square meters, six materials must be prepared (structural safety certificate, renderings, power consumption plan...)
• ​​Electric power transformation​ ​: Screens over 10 square meters must be routed separately, do not compete with the air conditioner circuit
• ​​Content management​ ​: Dynamic ads now need to be registered in advance, but static images save trouble.

Last month, a supermarket in Mouding opened, and I temporarily wanted to add rolling subtitles on the screen, but was asked to shut down the phone on the spot because it was not registered. This kind of low-level mistake must be avoided!

Editor's opinion

Buying a display screen is like looking for a marriage partner - the appearance is not as reliable as the interior. Now there is an automated factory in Mouding with a monthly output of tens of thousands square meters, and the process from measurement to installation can be completed in 20 days at the fastest. Remember three dos and don’ts: local service providers, third-party testing reports, and five-year all-inclusive after-sales service ； Don’t be greedy for cheap, don’t believe verbal promises, and don’t change plans at short notice. After all, it takes at least five years to install this thing on the wall. No one can bear it if it breaks down every three days. By the way, some "smart power-saving screens" have popped up in the industry recently, which are actually ordinary screens with a timer switch - this kind of pseudo-innovation should be eye-catching!

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