The big screen in the shopping mall leaked electricity and hurt people during heavy rain. This kind of thing is really not a scare. During the typhoon season in a southern city last year, there were three LED screen leakage accidents, and the most serious one cost 800,000 yuan in medical expenses. Today I will reveal to you the terrible hidden costs of installing large LED screens.

​​20% of people don’t know the installation restricted areas​​
Never install a screen in the following three places:

1. ​​Within 5 meters of high voltage electrical box​ ​(Electromagnetic interference can cause screen flickering)
2. ​​Seafood area vent​ ​(Salt spray corrodes circuit boards)
3. ​​Directly below the fire sprinkler​ ​(Water leakage will directly burn the power supply)

There is a real case: the screen installed in the fresh food section of a supermarket began to appear color patches in half a year. When it was disassembled, it was found that the circuit board was covered with green hair. Nowadays, the protective coating of high-end screens can reach IP65 level, and it can be washed directly with a water gun. This is especially suitable for humid environments.

​​There are three major pitfalls in installation fees​​
Do you think the quotation is all? Check out these hidden expenses:

• ​​Steel structure reinforcement fee​ ​(Additional charge is 300-800 yuan per square meter)
• ​​Night construction fee​ ​(Installation after the mall is closed is 3 times more expensive)
• ​​Brightness attenuation compensation​ ​(Old equipment costs 5% more in electricity bills every year)

Important reminder: Suppliers are required to provide an "Optical Parameter Test Report", focusing on these two values:
① Brightness uniformity ≥95%
② Color temperature deviation ≤150K
Last year, a screen installed by a chain drugstore caused distortion in the display of drug packages due to color temperature deviation, and customers complained about false advertising.

​​This is the most severe way to cut maintenance costs​​
Teach you three tricks to save wasted money:

1. ​​Choose modular design​ ​(Replace whichever piece is broken)
2. ​​Intelligent monitoring system​ ​(Warn of failure 7 days in advance)
3. ​​Sign a consumables lump sum agreement​ ​(Lock accessory prices for 3 years)

Here’s a little fun fact: A screen with automatic brightness adjustment can save more than 20,000 yuan in photovoltaic costs every year. The current industry-leading technology can achieve 0.5W/㎡ standby power consumption, which is equivalent to the power consumption of 10 mobile phones charging at the same time.

​​How to avoid judicial risks​​
When signing a contract, focus on these four items:

1. ​​Lightning protection testing and certification​ ​(Requires third-party reporting)
2. ​​construction liability insurance​ ​(The insured amount is not less than 5 million)
3. ​​Electromagnetic compatibility certificate​ ​(Avoid interfering with the cashier system)
4. ​​Glare control solution​ ​(Preventing customer dizziness complaints)

Last year, a shopping mall was ordered to pay NT$120,000 in damages due to the reflection of the screen causing customers to fall. Nowadays, high-end products will be treated with nano-level matte, and the reflectivity is controlled below 0.3%, which is equivalent to the process standard of automobile matte paint.

​​personal opinion​​
During the on-site inspection, we focused on three places:

1. ​​heat sink temperature​ ​(Qualified below 45℃)
2. ​​Box seam smoothness​ ​(It’s only good if the banknotes can’t be inserted)
3. ​​Power cord brand​ ​(Look for the VDE certification mark)

Recently, there is a new trend in the industry - full-process traceability system. By scanning the QR code on the screen, you can see the production batch, inspector number, aging test duration and other information. Only products that dare to show off their wealth are reliable. Remember, a good screen is a silent helper, and a bad screen is the ancestor of money.

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