Have you just been confused by the supplier's quotation? For the same P5 full-color scrolling screen, some people who quote 800 yuan/㎡, and some people who dare to call 3,000 yuan/㎡. Last year, a chain supermarket purchased the product and chose inferior screens because of greed for cheapness. As a result, the water inlet maintenance fee was 120,000 yuan more. Today we will talk about how to choose smartly.

​​1. Parameter Trap: These numbers are more important than prices​​
Don’t just stare at the price tag, first see through these three core indicators:

• ​​Refresh rate ≥1920Hz​ ​: Below this value, all the videos shot are ripple, and the live broadcast in the mall will be overturned
• ​​Intelligent brightness adjustment​ ​: Choose 800-1200cd/m² indoors, and 4000cd/m² outdoors, otherwise you will become a blind screen under the sun.
• ​​Protection level​ ​: At least IP65 outdoors, salt spray coating should be installed in coastal areas. Don’t learn from the unlucky guy who was blown away by a typhoon.

There is a lesson from a restaurant owner who is worth remembering: the brightness of the outdoor screen he bought is nominally 5000cd/m², and it is only 3800 when he uses a spectrometer to measure it. remember,​ ​Require suppliers to provide third-party testing reports​ ​, numbers are counted only in black and white.

​​2. The procurement channel has hidden secrets​​
Online platforms look cheap, but you may buy "Frankenstein Screen" (split refurbished screen). Teach you three tricks to inspect goods:

1. ​​Look at the module number​ ​: Each module of a regular manufacturer has an independent traceability code, just like an ID card
2. ​​Touch the heat dissipation hole​ ​: High-quality aluminum-magnesium-zinc alloy, finger tapping sound is crisp； Bad iron box with burrs
3. ​​Grayscale transition​ ​: Play 256-level grayscale images, and be able to clearly distinguish grayscales above 20 to be considered qualified

A car 4S store was once caught. The "new screen" purchased online was actually a refurbished rental screen, with a large color difference that customers thought was a faulty screen. suggestion​ ​First purchase and selection of physical exhibition hall inspection​ ​, have seen the playback effect with your own eyes before placing an order.

​​3. Hidden cost calculator​​
Do you think the purchase price saved is really profitable? Calculate these invisible bills:

• ​​Electricity bill black hole​ ​: The total negative drive technology saves 40% of electricity than traditional screens. Calculated by working 12 hours a day on the 10㎡ screen, the electricity bill difference of 42,000 in three years
• ​​Repair time​ ​: 24-hour response technical service, which loses 3 days of operating income per failure than ordinary service providers
• ​​Upgrade cost​ ​: Modularly designed screen body, the later point spacing upgrade can save 60% of the renovation cost

There is a typical case of a gym owner: the screen he chose cannot be replaced by modules. He wanted to upgrade from P10 to P5 two years later, but the overall replacement cost 80,000 more. Now all new boxes are supported​ ​Pre-maintenance design​ ​, a single worker can complete the module replacement.

​​Personal opinion​​
Buying an LED screen is like finding a partner. You can’t just look at the appearance (display effect), but also look at the "health indicators" (service life) and "family background" (supply chain strength). During the next negotiation, you might as well ask the supplier these three questions:

1. Which wafer fab is used for the driver IC?
2. What is the failure efficiency commitment of lamp beads?
3. Have you ever done a 72-hour continuous rainstorm test?

Real experts understand that those who dare to move laboratory data to the scene are reliable players. After all, the display screen will accompany you through 5-8 springs and autumns.

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