Last month, I helped my friend watch the shopping mall large-screen project, and the plan reported by the supplier made people's scalp tingling - the 100-square-meter P3 screen can also be priced from 800,000 to 2 million! What's even more outrageous is that there is a plan that says "imported high-end configuration". As a result, I opened the parameter table and saw that the driver chip model was older than the TV set I had five years ago. Today I will talk to everyone with my heart, how deep is the tricks in this industry?

1. Three things you must understand before buying a screen

I just heard a real thing last week: a chain supermarket bought a batch of "special screens" with cheap prices, but the promotional video was broadcast on the day of opening. The faces were full of mosaics in the distance. So, we have to understand these three key points first:

1. ​​Viewing distance determines pixel density​
   The calculation formula is so simple: the recent viewing distance (meters) ÷ 1000 = pixel spacing (mm)
   For example, the audience is standing 10 meters away, and choosing a P10 screen is enough. It is purely a money-burning to force P3.

2. ​​Using scenarios determine life and death​
   Let me talk about some configurations that are easy to fall:

   • The ad screen on the pedestrian street is not equipped with a sunshade (it is impossible to see clearly when the sun shines directly)
   • High reflective mask was used on the stage background screen (the artist was shaken so hard that he couldn't open his eyes)
   • The beach project did not provide salt spray protection (it was so rusty that my mother didn't recognize her after three months)

3. ​​Energy consumption is the hidden cost king​
   Calculate the calculations for everyone: the 100 square meters P4 screen is illuminated for 18 hours a day

   • Ordinary power supply plan: monthly electricity bill ≈12,000
   • Smart power saving solution: monthly electricity bill ≈8600
     The price difference is enough to hire two installation masters

2. Supplier screening and anti-pit guide

I came across a strange supplier a while ago, and the photos in the workshop were actually from PS! I will teach you a few tricks to verify your true self:

​​See factory five must check​​
① Is there an aging test area on the production line (at least 48 hours a day)
② Are modules in the warehouse open in batches (all second-hand dealers are mixed)
③ Ask if you can read the purchase order of the original lamp beads (80% of them dare not give it to you)
④ It is required to pilot high-speed sports images (traffic, sports events, etc.)
⑤ If you are cold and unpredictable, "How do you do anti-static measures?" (Professional manufacturers can tell the trick)

​​The devil is hidden in the contract​
Focus on these four points:

• The bad point rate is based on industry standards or its own standards (the gap can reach 10 times!)
• Including three-year accident insurance (you know how important it is when typhoons are on coastal areas)
• Do I need to charge additional fees for software upgrades (see that the upgrade fee of 80,000 yuan will be charged in the later period)
• Does not support remote diagnosis (how much travel expenses can you save when there is a problem in the middle of the night)

3. Devil details of installation and maintenance

Last year, a shopping mall built a large atrium screen, but did not pay attention to these three points when installing it, and it cost 280,000 yuan to rework:

1. ​​Transportation protection should be taken seriously​
   Focus on packaging plan:

   • Is there any independent earthquake proof bin in the module?
   • Is the corner protection three-layer corrugated paper?
   • Maritime transportation projects must be equipped with moisture-proof bags

2. ​​Don't violate the shaft when the structure bears the load​
   A lesson learned from blood and tears:
   A certain scenic spot installed a curved screen without calculating the wind load, but the first typhoon broke open 15% of the module. Remember this formula:
   ​​Total weight = screen weight + (wind speed²×area×0.6)​​
   If you don't know how to calculate, you will let the supplier produce a structure calculation book

3. ​​After-sales response is fast?​
   I will teach you a trick: call the supplier’s emergency call at 2 o’clock in the middle of the night before signing the contract. If no one answers for 20 minutes... you know. A good service team can do:

   • 2 hours remote response
   • 48 hours of maintenance
   • Always standby modules 5%

4. Should I get the money-burning configuration?

The three most asked questions recently:

1. "Is it necessary to have 4K ultra-high definition?"
   To be honest: There is no difference between P4 and P2.5 when viewing 10 meters away! Unless it is a scene like a museum that looks close to the face

2. "Is the interactive function worth it?"
   You can do promotions in shopping malls, but outdoor advertising screens are purely IQ tax - how many passers-by have you seen who really touch the advertising screen?

3. "Are imported light beads better?"
   Talk about the data: The failure efficiency of lamp beads of leading domestic manufacturers has reached <0.0001%, which is no worse than that of imported ones, and the price can be cut by 30%.

Finally, let me tell you the truth: I helped a chain of gyms select screens last year and insisted on doing a field investigation. As a result, the boss saw a magical operation in the manufacturer's test area - he used a high-pressure water gun to rush straight to the outdoor screen in the state of turning on the computer, and the water stopped and the screen did not flash! This kind of shock of seeing is real is more useful than a salesperson who has been joking for a long time. So, when buying a large screen, don’t just look at the parameter table. Running more, watching more, comparing more is the king.

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