Car smart screens are prone to glare in strong light environments, affecting operation. Fingerprint residues in daily use will also interfere with the display effect. Anti-glare and anti-fingerprint technology effectively solves these problems through the combination of optics and material science.
The basis of anti-glare technology is to change the reflection path of light. Car smart screens often use a matte treatment process to form countless tiny concave and convex structures on the screen surface. These microscopic structures are like countless micro prisms. When external light shines on the screen surface, the light will be dispersed into multiple directions by these concave and convex structures, rather than concentratedly reflected like a mirror screen to form a dazzling light spot. This diffuse reflection principle ensures that the driver will not experience visual discomfort due to direct light at any angle, thereby improving visibility in complex lighting environments such as direct sunlight and alternating light and dark in tunnels.
Optical coating is a key technology to enhance the anti-glare effect. Multiple layers of optical films are coated on the screen surface, and the thickness and refractive index of each layer of film are precisely designed. When light penetrates these films, different film layers will reflect and refract the light multiple times, and some of the reflected light will interfere with each other between the film layers to offset the intensity of the reflected light. For example, some high-end car smart screens are coated with silicon dioxide (SiO?) and titanium dioxide (TiO?) films with low reflectivity, reducing the reflectivity of the screen surface from the conventional 4% to 1% or even lower, significantly reducing the interference of ambient light on the screen display content.
Anti-fingerprint technology mainly relies on special surface coatings. Nano coating technology is currently a widely used solution, which coats a layer of nano-scale hydrophobic and oleophobic materials, such as fluoropolymers, on the surface of the screen. The special structure between the molecules of these nano materials makes it difficult for water and oil molecules to adhere. When the finger touches the screen, the oil and water on the fingerprint cannot form a complete mark on the screen surface, but shrink into small droplets, which can be removed by gently wiping. At the same time, the nano coating can also reduce the surface friction coefficient, reduce the resistance when the finger slides, and make the operation smoother and smoother.
In addition to nano coatings, self-cleaning coatings also play a role in anti-fingerprint technology. Some car smart screens use photocatalytic self-cleaning coatings, the main component of which is titanium dioxide (TiO?). Under ultraviolet irradiation, titanium dioxide will produce a photocatalytic effect, decomposing organic pollutants (such as grease in fingerprints) attached to the screen surface into harmless substances such as carbon dioxide and water, thereby achieving the effect of automatic cleaning. This technology can not only reduce fingerprint residues, but also prevent dust, stains, etc. from accumulating on the screen surface, keeping the screen clean for a long time.
In actual production, anti-glare and anti-fingerprint technologies do not exist independently, but are used in combination with each other. For example, anti-fingerprint nano-coating is applied to the matte-treated screen surface, which can not only ensure the low reflection effect of the screen, but also prevent fingerprint contamination. At the same time, in order to ensure the durability of the two technologies, the screen will be hardened during the production process, and a hard protective film will be formed on the screen surface by chemical or physical methods to enhance the wear resistance and scratch resistance of the coating, and avoid the degradation of anti-glare and anti-fingerprint performance due to friction in daily use.
With the development of technology, anti-glare and anti-fingerprint technologies are also constantly innovating. For example, some new smart screens use dynamic optical adjustment technology, and built-in light sensors sense the ambient light intensity and angle in real time, and automatically adjust the optical properties of the screen surface. When the light is strong, the screen automatically enhances the anti-glare effect; when the light is weak, it restores high-definition display. In terms of anti-fingerprint, R&D personnel are exploring new materials, such as coatings with bionic lotus leaf surface structures, which further enhance the anti-fingerprint effect by imitating the super-hydrophobic and super-oleophobic properties of lotus leaves.
Although anti-glare and anti-fingerprint technologies have made significant progress, they still face some challenges. For example, overly rough matte treatment may reduce the clarity and color reproduction of the screen; nano-coatings may wear out after long-term use, resulting in reduced anti-fingerprint performance. In the future, how to further improve the durability and stability of anti-glare and anti-fingerprint technologies while ensuring the screen display effect will be the focus of industry research, so as to provide drivers with a better visual experience and operating experience.
