Smart dimming coatings embed electrochromic films within glass interlayers, allowing transparency to be adjusted by applying voltage, enabling switching between high transparency and privacy-enhancing fogging modes.

Coated privacy windshield glass refers to specialized automotive glass that achieves privacy protection by forming functional films on the surface or within the interlayer of automotive windshields through coating processes such as magnetron vacuum sputtering.

The privacy protection function of coated privacy windshield glass is primarily achieved through two technical approaches. First, one-way perspective coatings attach special optical film layers to the glass surface, utilizing light reflection and refraction to create a one-way perspective effect where the interior remains visible from the inside while remaining obscured from the outside. Second, smart dimming coatings embed electrochromic films within glass interlayers, allowing transparency to be adjusted by applying voltage, enabling switching between high transparency and privacy-enhancing fogging modes.

According to the "2026-2030 Global and China Coated Privacy Windshield Glass Industry Research and 15th Five-Year Plan Analysis Report" released by the New Industry Research Center, among the two technical routes for coated privacy windshield glass, one-way perspective coating technology offers only one-way visibility and primarily serves privacy needs, with limited heat insulation performance. In contrast, smart dimming coating technology not only provides privacy protection but also offers multiple functions such as sound insulation, heat insulation, and adjustable transparency, better aligning with the demands of automotive intelligence and multifunctional windshield development. It has become a key growth direction in the automotive coated privacy windshield glass industry.

In terms of Chinese enterprises entering the coated privacy windshield glass market, Uni-President Glass Automotive Glass Co., Ltd. has introduced coated front windshields with functional surface coatings that balance light transmission, heat insulation, and anti-glare properties. Fuyao Glass has launched products such as LC dye-based full-domain dimming glass, PDLC multi-level dimming skylights, and EC electrochromic glass. Haiyou New Materials has introduced a PDCLC solution that adds self-developed dyes to existing PDLC technology, resulting in a gray-black appearance when not powered.

Several automotive models in China now feature coated privacy windshield glass, including the IM L6, Yangwang U8L, Xiaomi SU7, Xiaomi YU7, and Wenjie M9. For example, the Xiaomi YU7 employs a multi-layer silver film coating process on its inner glass layers, effectively reflecting infrared rays, with a triple-layer silver coating on the front windshield achieving 97.6% infrared rejection. XPENG Motors, in collaboration with Fuyao Glass, has mass-produced AI dimming privacy glass with a light transmission adjustment range of 0.6% to 16%, capable of blocking 99.9% of UV rays and 99.4% of visible light in dark mode.

Industry analysts from New Industry Research Center note that China's standards for coated privacy windshield glass are continuously improving, including key specifications such as "Intelligent Color-Changing Glass for Automobiles - Part 2: Polymer-Dispersed Liquid Crystal Dimming Glass" (GB/T 46023.2-2025), "Intelligent Color-Changing Glass for Automobiles - Part 3: Suspended Particle Device Dimming Glass" (GB/T 46023.3-2025), "Test and Evaluation Methods for Optical and Thermal Comfort of Automotive Glass" (GB/T 46021-2025), and "Intelligent Color-Changing Glass for Automobiles - Part 1: Organic Electrochromic Glass" (GB/T 46023.1-2025). These standards provide a solid foundation for the standardized development of China's coated privacy windshield glass industry.

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