JP Ver.

Kiyosu, Japan, August 22, 2025: Toyoda Gosei Co., Ltd. has developed a technology that allows light to pass through the painted surfaces of plastic exteriors from behind, allowing the clear display of light patterns or signage on these surfaces.

Previously, achieving light transmission through painted surfaces required numerous holes, which degraded the surface appearance when the lights were off. Now, through innovations in paint composition design and membrane thickness control, patterns can be depicted using backlight without compromising exterior quality.

Additionally, Toyota Gosei has improved its technology to transmit millimeter waves through metallic finish painted surfaces, enabling a unified metallic appearance even in areas equipped with millimeter-wave radar devices. These embellishing technologies will contribute to attractive vehicle design.

 Concept model of front panel using light transmission technology

 

▼Maintains exterior quality when not lit

[Reference] Toyoda Gosei’s technology for integrating design and functionality into exterior parts

The table can be scrolled left and right

Technology	Millimeter-wave transmission through emblem	Light transmission through emblem	Millimeter-wave and light transmission through emblem	Millimeter-wave and light transmission through painted surface
Year Developed	2003	2022	2023World’s first*	2025Current development
Applied Products	Millimeter wave radar compatible emblems	LED illuminated emblems	Millimeter wave radar compatible emblems that emit light	Light transmission technology (Millimeter wave transmission through metallic painted surface)