With the development of technology, automotive multimedia is becoming increasingly diverse, and the application of in car LCD screens in automobiles is increasing. From the previous central control multimedia navigation system to the rear entertainment system, even the instrument panel and rearview mirror have been replaced with LCD screens. Today, the editor talked about LCD screens in cars, which is different from LCD screens in our phones and computers. LCD cars can operate in extremely extreme temperatures.
Firstly, the working environment of cars is quite complex. Whether it's morning or evening, spring, summer, autumn, winter, or around the world, our cars work when we need them. Cars are exposed to sunlight in summer, and the cabin temperature is very high, so the electronic components inside the car must be able to work together without any problems. In some northern regions, winter is very cold and ordinary LCD screens cannot work. At this point, it is necessary to display driving information and use a high-temperature and low-temperature resistant LCD screen to escort the car owner.
2. Automotive International Safety Testing
According to the standard, testing all car components takes 10 days, and the performance of the testing device can be fully detected.
High temperature storage test temperature: 70 ℃, 80 ℃, 85 ℃, 105 ℃, 300 hours
Low temperature storage test temperature: -20 ℃, -30 ℃, -40 ℃, 300 hours
High temperature and humidity test operation: 40 ℃/90% relative humidity (non condensing), 300 hours
High temperature operation test temperature: 50 ℃, 60 ℃, 80 ℃, 85 ℃, 300 hours
Low temperature operation test temperature: 0 ℃, -20 ℃, -30 ℃, 300 hours
Temperature cycling test: -20 ℃ (1 hour) ← r T (10 minutes) → 60 ℃ (1 hour), five times
From this, it can be seen that the requirements for automotive LCD screens are very high. Under extreme conditions ranging from -40 ℃ to 105 ℃, it must work well for at least 300 hours.
In order to work properly in extreme temperature environments, a bright LCD screen also needs to be visible and waterproof in ultra bright sunlight. And GPU, display screen, etc. The temperature of the LCD display module will increase during use. The higher the resolution of the LCD screen, the greater the heat generation. Therefore, it is also a technical challenge for the testing R&D team to find or develop hardware products suitable for use in vehicle environments, matching a set of hardware environments that meet the requirements of vehicle usage. Due to these reasons, compared to the resolution of displays such as mobile phones and televisions, car displays are relatively conservative.