Have all the people in charge of municipal procurement been troubled by this problem recently? Last year, in a provincial capital city, all the car screens that had just been installed for three months went black. After repeated searches, it turned out that the fault was caused by the installation location. Today we will break it down and talk about this doorway. After reading this, I guarantee that you will avoid two years of detours.

1. University knowledge is hidden in the golden triangle area

Let’s talk about a real case first: A tourist city in the south installed a display screen on the front of the car. As a result, 20 driver boards were burned out in half a month during the rainy season. Later, the position was moved to the top of the car door, and it has not had any problems for three years. ​ ​There are three hard indicators to consider when choosing a location for a car screen:​​：

1. ​​Ventilation and heat dissipation​ ​: Leave 10cm space around for heat dissipation
2. ​​Waterproof level​ ​: IP65 is the bottom line (can withstand high-pressure water guns)
3. ​​Viewing angle​ ​: Horizontal 120° + vertical 80° is the passing line

Take the most common position of the front of the car as an example. It seems to be conspicuous but is actually full of dangers. Engine heat + direct sunlight can turn the screen into a "teppanyaki" in minutes. On the contrary, it is located above the door, which not only avoids the engine heat source, but also allows standing passengers to see information clearly.

2. These pitfalls must be avoided.

When we were doing a project for an island country in Southeast Asia last year, the other party insisted on installing the screen on the armrest. As a result, three screens were scratched by passengers’ backpacks on the first day of trial operation! ​ ​Three principles of not installing car screens​​：

• ​​No shock zone installed​ ​(such as directly above the wheel)
• ​​No collision zone​ ​(such as armrests, back of seats)
• ​​No high temperature zone installed​ ​(such as above the engine compartment)

There is a data you should keep in mind: the failure rate of a screen installed in a vibration zone is 2.8 times higher than that in a stable zone! We have tested equipment that has been running for three years. The loss rate of screen components installed in the middle of the roof is 60% lower than that of the door.

3. The life and death line of selection parameters

Don’t think that everything will be fine just by choosing a good location. These parameters are the real deal:

Especially the brightness adaptive function, which can automatically adjust 3000-7500cd/m² according to the ambient light. Last year, 200 buses were renovated in a tropical city. This function saved 180,000 kilowatt-hours of electricity every year!

Exclusive data revealed

Industry reports show that the combination of correct location selection and high-quality equipment can reduce operation and maintenance costs by 60%. We have tracked transformation cases in 5 cities:

• Screen life extended from 2.3 years to 5.8 years
• Fault response time reduced from 48 hours to 6 hours
• Passenger complaint rate dropped by 72%

In particular, equipment using flip-chip COB technology can still start normally in extremely cold weather of -30°C. This has been tested in the Northeast region and the effect is amazing!

The old driver said something from the bottom of his heart.

After fifteen years of working in vehicle-mounted display, I have seen too many tragedies where "position destroys everything". There was a project last year. The owner insisted on saving the installation fee of 800 yuan per unit, but the maintenance fee for half a year ended up being 200,000 yuan. If you want me to say,​ ​Choosing a position is choosing a destiny​ ​! Just like when we installed 2,000 screens in an international metropolis, only 3 were replaced during the five-year warranty period. The secret was all in the three-dimensional thermal simulation done during site selection.

Remember to get the three-piece set to test next time you plan:

1. Infrared thermometer gun scans the installation area
2. Decibel meter measures ambient noise
3. Light meter to check light intensity
   If you follow these three steps, you are guaranteed to choose a seat that is more reliable than 90% of your peers!

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