Lighting device arranged on a front face or on a rear face of a motor vehicle and comprising a display panel, display system comprising such a lighting device, and method for displaying on said device

The electrowetting technology in vehicle lighting devices addresses energy inefficiencies by using superimposed layers with color-changing droplets to create flexible, energy-efficient displays for outdoor use.

WO2026114995A1PCT designated stage Publication Date: 2026-06-04VALEO VISION SA
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
VALEO VISION SA
Filing Date
2025-11-26
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing vehicle lighting and display technologies are energy-intensive and unsuitable for outdoor use due to environmental conditions, and there is a need for a low-energy display device that can be mounted on the front or rear of a motor vehicle.

Method used

A lighting device using electrowetting technology with a display panel comprising three superimposed electrowetting layers, each containing droplets of cyan, magenta, or yellow liquid, which change state based on electrical voltage to control light transmission and display images.

Benefits of technology

The electrowetting technology provides a flexible, energy-efficient display capable of withstanding outdoor conditions and offering multicolor images without the need for external light, reducing energy consumption and integrating seamlessly into vehicle design.

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    Figure EP2025084443_04062026_PF_FP_ABST
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Abstract

The invention relates to a lighting device arranged on a front face or on a rear face of a motor vehicle, the lighting device comprising: - a light source; - a surface transparent to the light emitted by the source; - a transparent display panel arranged on the transparent surface; which transparent display panel comprises: - a first electrowetting layer (503) formed of cells which each contain a droplet of a liquid; - a second electrowetting layer (507) formed of cells which each contain a droplet of a liquid; - a third electrowetting layer (511) formed of cells which each contain a droplet of a liquid; - the first, second and third electrowetting layers being stacked on one another, and each droplet being in an expanded state or in a contracted state, the state being respectively determined by an electrical voltage of the first, second or third electrodes.
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