Are you bosses having a headache? If you want to install a cool large LED screen in a shopping mall, search online——​ ​P2.5, 3840Hz, low brightness and high gray... these parameters make people dizzy! ​ ​What’s even more irritating is that some salesmen are full of lies and hype, only to find out after finishing the installation that they are reflective during the day and dazzling at night. Today we will break it down and talk about it, and teach you step by step how to avoid these pitfalls!

1. The more advanced the parameters, the better? wrong!

Last year when I was remodeling a convenience store chain, I came across a typical case: a supplier pushed hard for a P1.8 ultra-high-definition screen, but it was installed in a 5-meter-high atrium. When customers looked up their necks, they saw double images! ​ ​Remember this formula: optimal viewing distance = pixel pitch × 1000​​

• Shopping guide screen at checkout (viewed at 2 meters): P2.5 is delicate enough
• Large screen in shopping mall atrium (8-meter viewing): P6 is the most cost-effective
• Stadium fence screen (20 meters away): P10 is actually clearer

One customer was particularly smart - he took a tape measure to measure the installation location and directly asked the supplier to do an on-site visual effects demonstration, saving 30,000 in wasted money!

Three unique tricks for goods inspection

1. Brightness measurement method

Bring a bottle of mineral water for inspection! Set the screen to pure white:

• The production date can be seen clearly when the bottle cap is 30 cm away from the screen → the brightness meets the standard
• Obvious color spots appear→poor consistency of lamp beads
• The screen is hot and hot to the touch → the cooling system is unqualified

2. The quality of the box looks like this

• Percussion and listening: dull sound = aluminum-magnesium alloy, crisp sound = inferior material
• Splicing test: A coin is considered qualified if it cannot be inserted vertically into the seam
• Quick disassembly demonstration: The female clerk can also remove the box in 10 seconds

3. Must-test items for content management systems

• The mobile phone’s advertising response speed is >3 seconds with a direct pass
• The screen does not move after suddenly unplugging the power and restarting.
• Automatically dim the brightness at 2 a.m. (key to save power)

Cost comparison table (taking a 20㎡ screen as an example)

(Data comes from statistics of 36 stores in 8 cities)

Editor's diary of pitfalls

Last month, a restaurant owner was tricked into buying a "military-grade waterproof" screen. As a result, mosquitoes breed in the screen during the rainy season... Later, he discovered that the so-called waterproof certification was PS! Now let me teach you a trick:

​​Ask suppliers to provide customer lists from three years ago​ ​, randomly selected three people to call and ask about their after-sales experience. Only those who dare to provide real contact information are reliable. This method helped me filter out 80% of the handbag companies!

(Tips: Some particularly cheap screens use second-hand lamp beads. Such screens will have color differences after half a year of use, so be careful! )

personal opinion time

After working on projects for more than ten years, I discovered a strange phenomenon:​ ​The more eager the supplier is to sign the contract, the more problems it will have! ​ ​Really good products speak for themselves - just like the fence screen we installed for the Tokyo Stadium, only two lamp beads were replaced after five years of use.

Remember to ask these three questions before your next purchase:

1. Can the lamp bead brand be written in the contract?
2. Is the driving power supply a drawer-type design?
3. Is there 24/7 remote diagnosis?

Got it? ​ ​There is no need to brag about a good screen, the real work is in the details! ​ ​

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