Toyoda Gosei Develops Dynamic Shadowy Illumination for Lexus RZ

Toyoda Gosei reports on Dynamic Shadowy Illumination, a new interior lighting system with moving patterns, introduced for the Lexus RZ electric vehicle.

Toyoda Gosei has unveiled a new interior lighting solution called Dynamic Shadowy Illumination, introducing moving patterned light into vehicle cabins. The technology has already entered real-world use and is featured in the Lexus RZ1 battery electric vehicle produced by Toyota Motor.

The system is built around an LED lamp unit equipped with three individual light sources, each containing its own patterned plate. By smoothly switching between the lamps with fade-in and fade-out effects, the unit creates gentle, flowing light movement. The result is a calm and refined visual atmosphere designed to enhance the sense of comfort inside the vehicle.

The development reflects the growing demand for interior illumination that goes beyond basic functionality. In recent years, automotive lighting has increasingly been linked to sensors, welcome sequences, and other in-cabin experiences. Dynamic Shadowy Illumination aligns with this shift by adding a decorative and emotional layer to interior design.

The lighting system is used in the Lexus RZ1 Version L and F SPORT models. The same vehicle also incorporates another Toyoda Gosei innovation: a steering wheel designed for steer-by-wire systems. This technology controls wheel angle through electronic signals rather than mechanical linkage, reducing the need for multiple steering rotations during parking or U-turns and enabling a shape similar to an aircraft yoke.

Together, these technologies point to a broader transformation of the electric vehicle interior. Rather than serving purely functional purposes, design elements such as lighting and steering are increasingly used to shape a more intuitive, relaxed, and immersive driving environment.