With the development of display technology and manufacturing industry, automotive multimedia is becoming more and more diverse, and the application forms of LCD screens in automobiles are also increasing. From the traditional central control multimedia navigation system to the rear entertainment system, even now the instrument panel and rearview mirror are beginning to be replaced by LCD screens. The car LCD screen is different from the LCD screens of mobile phones and computers that we usually use. Car LCD screens are required to work at very extreme temperatures.
Why do car LCD screens have high and low temperature resistance
First, why the car LCD screen should be resistant to high and low temperatures
First of all, the working environment of a car is relatively complicated. No matter sooner or later, spring, summer, autumn and winter, no matter in different parts of the world, cars are required to work. Cars often get sun exposure in summer, and the cabin temperature can be as high as 60 degrees. The electronic components in the car must be able to work normally with the car. In some northern areas, the winter is very cold and ordinary LCD screens cannot work. At these times, a high- and low-temperature liquid crystal display is required to display driving information for the owner to escort.
2. International safety testing standards
According to the requirements of the national standard, all auto parts require 10 days of testing, which can completely detect the performance of the test device.
Among them, for car LCD screens, the LCD car test standards in the ISO automotive electronics reliability test and related standards are as follows:
High temperature storage test temperature: 70 ℃, 80 ℃, 85 ℃, 105 ℃, 300 hours
Low temperature storage test temperature: -20 ℃, -30 ℃, -40 ℃, 300 hours
High temperature and high humidity test operation: 40 ℃ / 90% R.H. (Without condensation), 300 hours
High temperature operation test temperature: 50 ℃, 60 ℃, 80 ℃, 85 ℃, 300 hours
Low temperature operation test temperature: 0 ℃, -20 ℃, -30 ℃, 300 hours
Temperature cycle test: -20 ℃ (1H) ← R.T. (10min) → 60 ℃ (1H), cycle five times
It can be seen from this that the requirements of automotive LCD screens are very high. The extreme conditions from -40 ° C to 105 ° C must be in good condition for more than 300 hours.
3. Development prospects of automotive LCD screens
The high-brightness LCD screen needs to be visible and waterproof under ultra-bright sunlight while achieving normal operation in extreme temperature environments. In addition, the GPU and the display of the liquid crystal display module will generate heat during use. The higher the resolution of the liquid crystal display, the greater the heat. Therefore, it is also a major technical problem to develop a set of hardware products that meet the requirements for vehicle use. For these reasons, compared to the resolution of LCD screens such as mobile phones, computers, and TVs, car displays are relatively conservative.
Now the LCD screen technology has become more and more mature, and the application of car LCD screens is also increasing. The LCD screen can already fully meet the changing working environment and work requirements of automobiles. The LCD screen has completed a very big change in the application of automobiles. With the development of technology, the development momentum of vehicle-mounted LCD screens will also be very rapid.