Illuminated device with synchronized switchable screens

The synchronized switchable screens in a lighting device for motor vehicles address the inefficiencies and high costs of existing technologies by providing efficient and cost-effective light animations with enhanced luminous efficiency and flexibility.

FR3161723A1Pending Publication Date: 2025-10-31VALEO VISION SA
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Patent Information

Application Number
FR2024004443
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-29
Publication Date
2025-10-31

AI Technical Summary

Technical Problem

Existing lighting devices in motor vehicles, particularly those using LEDs or LCD screens for light animations, are expensive and suffer from inefficiencies in luminous efficiency and cost, necessitating a more cost-effective solution with improved control and luminous efficiency.

Method used

A lighting device utilizing a light guide with two switchable screens, where the switching control of one screen is synchronized with the other, allowing for precise control of light propagation and decoupling, enhancing luminous efficiency and reducing costs.

Benefits of technology

The synchronized switchable screens enable efficient light animations with improved luminous efficiency, cost-effectiveness, and flexibility for various vehicle applications, while maintaining sharp contrast and homogeneity.

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Abstract

Title of the invention: Lighting device with synchronized switchable screens. The present invention relates to a lighting device (1) comprising a light guide (2) including an output face (4), a decoupling face (6), and a slice (6, 8), the lighting device (1) comprising at least one light source (12) opposite the slice (6, 8), the light source (12) being configured to emit light rays intended to propagate within the light guide (2) by total internal reflections, the lighting device (1) being characterized in that it comprises a first switchable screen (18) disposed opposite the output face (4) and a second switchable screen (20), the switchable screens (18, 20) respectively comprising several pixels (22, 24, 26), the switching control of each of the switchable screens (18, 20) being interdependent. Abstract figure: Figure 1
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