The HUD (Head-Up Display) system is a head-up display system that is installed in smart electric vehicles. As an innovative technological application that can improve driving safety and convenience, it has received increased attention with the growing popularity of smart electric vehicles. Sapphire, a material renowned for its exceptional performance, is being used in increasing numbers in the HUD of smart electric vehicles.

HUD module liquid crystal display screen-sapphire glass cover plate

Presently, the material primarily used in the LCD screens of HUD modules is sapphire cover glass. Sapphire is a crystalline material composed of aluminium oxide (Al2O3). The high hardness, exceptional light transmittance and high-temperature resistance of sapphire make it an optimal selection for HUD applications in smart cars.

The characteristics of sapphire and its advantages in HUD application

(1) Sapphire material exhibits high hardness, enhancing the durability of the HUD system

Sapphire has a Mohs hardness of 9, second only to diamond. The material exhibits excellent wear resistance and scratch resistance, which serves to effectively resist external forces and extend the service life of the HUD system. Secondly, sapphire material has been demonstrated to maintain surface smoothness in harsh usage environments, thereby ensuring the clear display of HUD images.

(2) Sapphire material exhibits high light transmittance, enhancing the display effect of the HUD system

Sapphire exhibits excellent light transmittance within the visible light range, thereby ensuring sufficient light transmission and enhancing the brightness and contrast of the HUD system. This results in a clearer and more vivid image, enabling drivers to clearly perceive the display information under various lighting conditions.

(3) Sapphire material exhibits high-temperature resistance, ensuring the stable operation of the HUD system

During the operation of a vehicle, a relatively high temperature is generated. Sapphire exhibits excellent high-temperature resistance, with the capacity to maintain stable physical and chemical properties in high-temperature environments. This ensures the normal operation of the HUD system.

(4) Sapphire material exhibits excellent chemical stability

Sapphire’s chemical stability makes it resistant to erosion by chemical substances, ensuring a long service life in the complex internal environment of automobiles.