Lao Zhang, the owner of a car modification shop who just joined the industry, asked me: "I want to buy a batch of car screens. I have them from 300 to 30,000 on a certain website. With this price difference, I can buy a Wuling Hongguang!" "These words can be regarded as asking about the pain points of the industry. Nowadays, the automotive display market is a mixed bag, and you can’t tell the difference between good and bad just by looking at the parameter table. Today we are going to take a look at the details here.

​​First understand the special requirements of car screens​​
It’s not the same thing as an ordinary display screen! Vehicle-mounted equipment must withstand the vibrations of asphalt roads and withstand temperature differences from -20°C to 70°C. Last year, a wedding company bought a screen at a bargain price. When driving on the highway, the module was shaken off and the video of the newlyweds turning into snowflakes. Such an accident would cost more than just the equipment.

​​For core parameters, look at these five hard indicators.​​

1. ​​Earthquake resistance level​ ​: Must pass the 5-55Hz frequency vibration test, and work continuously for 8 hours at an amplitude of 1.5mm without screen lag.
2. ​​Wide temperature working​ ​: No delay in starting at low temperature of -30℃, no brightness reduction at high temperature of 70℃ is the real skill
3. ​​Anti-glare technology​ ​: The visibility under sunlight must be above 750cd/m², and an AG anti-glare layer must be provided.
4. ​​instant start​ ​: The screen must be turned on within 3 seconds of ignition. If it is slower than this speed, pass directly.
5. ​​Interface protection​ ​: At least IP54 waterproof and dustproof, and those used in oil tankers must be IP67

​​How deep are the procurement channels?​​
An auto parts store owner told me the truth: for the same size screen, the cost price of professional manufacturers is four times more expensive than that of counterfeit products. But the lifespan of the driver chips used by others is 50,000 hours, and the knockoff products will fade after 10,000 hours. Here is a trick for everyone - ask suppliers to provide​ ​High and low temperature cycle test video​ ​, the real guy is the one who dares to demonstrate the temperature difference impact test on site.

​​Installation location and size comparison table​​

​​Three pitfalls you should never step on​​
× Choosing public model products for cheap: The firmware of this kind of screen has not been updated for ten years, and it can’t even connect to CarPlay.
× Ignore electromagnetic compatibility certification: Equipment without EMC testing will make the car radio noisy throughout the process
× Skip the heat dissipation system: the brightness of a passive heat dissipation screen will decrease by 30% after half a year. You must choose one with a turbine air duct.

The editor finally says something from the bottom of my heart: In the car screen industry, if you find someone who​ ​Fully automatic SMT patch production line​ ​Manufacturers are considered entry-level. The throughput rate of this type of factory can reach over 98%, which is much more stable than a manual workshop. Next time you inspect the goods, remember to focus on the solder joints of the PCB board - the solder joints of the machine-soldered ones are like mass-produced moon cakes, and the solder joints of the hand-soldered ones are like glutinous rice balls made by hand. You can tell them apart at a glance!

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