Can this thing really last for ten years?

Recently I saw a video - the advertising screen of a convenience store suddenly got stuck while rolling, turning into an 8-word infinite loop of "20% off for the whole venue". The following netizens commented: "Boss is going to pay a discount until 2080!" "Behind you tell this joke, how many businesses are worried about choosing advertising screens?

Experts first look at the three life gates when buying a screen

Last year, I encountered a weird thing when I helped my friend choose a screen: the price difference between the same manufacturer is three times! Later I learned that there was a lot of knowledge here:

1. ​​Lifetime of lamp beads​ ​: A manufacturer who dares to be a 50,000-hour mark must have an aging test room in the workshop (baking the lamp beads for 72 hours continuously is considered qualified)
2. ​​Control system​ ​: Only those who can remotely modify content are considered modern screens (you can't let employees climb ladders every day to plug in USB flash drives)
3. ​​Protection level​ ​: IP65 is the starting price (or what if there is a leakage in rainy days)

(To tell me the truth: a chain supermarket changed a new screen, but as soon as the rainy season in the south arrived, the lower half of the screen directly turned into an "abstract painting", and the maintenance fee was more expensive than buying a screen)

Hidden traps in parameter table

Have you also been confused by these terms? Let's translate it into human words:

• ​​Refresh rate ≥1920Hz​ ​: There will be no scan line when shooting videos (must be required for shooting advertisements on Douyin)
• ​​Viewable angle >160°​ ​: The old man across the street can also see the promotional price clearly
• ​​Grayscale level starting from 64​ ​: The gradient effect of "24-hour business" is like ink painting

I secretly tell you that some manufacturers use second-hand lamp beads to make up the numbers. They are very bright as if they are installed, and they are as dark as if they are covered with dust in three months. It depends on whether the manufacturer has it​ ​Full process quality inspection report​ ​, the ID card of each lamp bead can be found!

The installation site is more exciting than the product

Last month, I witnessed the professional team's operation with my own eyes: installing a door front screen for a milk tea shop, and it only took 4 hours from measuring to power-up. The secret is here:

1. ​​Quick box removal design​ ​: Simple as LEGO
2. ​​Intelligent brightness adjustment​ ​: Automatically turn bright and dark according to the sky (saving electricity and protecting eyes)
3. ​​Fault self-test system​ ​:Which lamp bead breaks down the phone immediately calls the police

The most amazing thing is theirs​ ​24-hour response center​ ​, I heard that a customer had a problem with the screen during New Year's Eve, and the engineer's video guidance was done in 20 minutes, which was more punctual than the delivery guy!

Iron law of purchasing for global project verification

A convenience store in Tokyo has used a scrolling screen for five years and can still clearly display text 1 cm high. The secret revealed by the purchasing manager:

1. ​​See certification​ ​: CE and CCC are more reliable than salespersons
2. ​​Check production capacity​ ​: Only manufacturers with a monthly output of 10,000 square meters can the quality be stable
3. ​​Ask for the case​ ​: I have done 110 national projects and have seen any extreme weather

(Those important things three times: you need a third-party inspection report! Need a test report! Need a test report! )

If I ask me, buying this kind of equipment that you use every day is like finding a partner——​ ​You can't just look at the face (appearance), but also the internal (parameters) and family background (manufacturer's strength)​ ​. Next time I met a salesperson who was so singular, I just threw him into three consecutive questions: Whose family belongs to the lamp beads? What brand of control card? What is the return repair rate in the past three years? Be sure to let the fake show up on the spot!

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