Are you also having a headache about this matter? The prime spot in the shopping mall with the most traffic is vacant. I want to install a rolling advertising screen but I don’t know where to start. Last month, I helped a friend choose a screen and found that the industry is too deep - the price of a P4 screen of the same size can jump from 80,000 to 250,000. This price difference can buy a small car! Today we will break it apart and talk about the secrets here.

​​Let’s talk about a real case first​ ​: A shopping mall in a third-tier city installed a 20-square-meter indoor screen last year. Color patches appeared just after the warranty period. The repair fee quoted was more expensive than the original screen purchase. Later I found out that I used second-hand lamp beads. Do you think it’s a problem?

Procurement channel red and black list

I have personally tried all three of these paths:

1. ​​Online wholesale platform​​

   • Advantages: Transparent prices, often with three- to five-year warranty commitments
   • Minefield: Some merchants play word games. The "five-year warranty" actually only covers the power supply and not the lamp beads.
   • Anti-pit tips: must be provided by the seller​ ​48 hours aging test video​​

2. ​​Factory direct sales channels​​

   • Focus on two points: do you have your own optoelectronics laboratory + whether the monthly production capacity exceeds 10,000 square meters
   • Here’s a tough trick: ask to see real-time monitoring of the factory. Really powerful manufacturers dare to show you the production line.

3. ​​system integrator​​

   • It is suitable for Party A who is afraid of trouble, but the middleman can make up to 40% of the price difference.
   • Remember to check the key parameters:​ ​Refresh rate ≥1920Hz​​、​​Automatic brightness adjustment range 800-1200cd/m²​​

Technical Parameters Life and Death Line

These indicators can save tens of thousands of tuition fees:

• ​​Pixel pitch​ ​: For indoor shopping malls, choose P3-P6, and for large atrium screens, P4 is recommended (62,500 pixels per square meter).
• ​​Protection level​ ​: Areas with high traffic must be IP54 dustproof and waterproof. You know the screens near milk tea shops...
• ​​Thermal configuration​ ​: Screen life with intelligent temperature control system can be extended by 3 years

The most outrageous case I saw last year: The screen of an Internet celebrity in a shopping mall overheated and crashed after being turned on for 2 hours. Later, it was discovered that the heat sink was actually made of plastic and aluminized!

Tips for saving money on installation plans

​​Location selection​ ​Be particular about:

1. Escalator side wall: The natural viewing angle of the human eye is 15-30 degrees, and the screen tilts 10 degrees for the best effect.
2. Opposite the service desk: Playing promotional information increases the conversion rate by 18%
3. Avoid glass curtain walls: direct sunlight will accelerate screen brightness attenuation by 50%

​​Installation method​ ​Save the comparison table:

Unspoken rules for maintenance

These three pitfalls are a must-see for newbies:

1. ​​Warranty routine​ ​: If it says "five-year warranty" it may only cover the frame but not the lamp beads, so keep an eye on it.​ ​Lamp bead life commitment ≥100,000 hours​​
2. ​​Accessories monopoly​ ​: Some manufacturers use special connectors. If you want to change the power supply later, you have to go to the original manufacturer.
3. ​​brightness trap​ ​: An outdoor screen is considered qualified if its brightness drops to 70% of the initial value after half a year? In fact, a good screen can maintain more than 85%

A shopping mall manager complained to me: There is a "mandatory maintenance four times a year" clause hidden in the maintenance contract. After three years, the maintenance fee will be more expensive than buying a screen!

Editor's point of view: Nowadays, when buying a screen, you have to learn to "need both" - both​ ​With intelligent brightness adjustment​ ​To prevent overexposure, it is important to​ ​Modular design​ ​Easy to replace. The smartest purchase I have ever seen is done like this: the contract states that "the lamp failure rate is ≤0.01% per year for the first three years." If the lamp failure rate exceeds the standard, replace it with a new screen. By the way, don’t believe the rhetoric of “imported chips.” Last year’s industry census showed that 85% of driver ICs were domestically produced, and everyone in the industry knew this tacitly.

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