Vehicle Interior Light Guide Layout for Multi-Function Lighting
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Solution Overview
Problem
Existing motor vehicle interior lighting systems require multiple light sources and control members for various lighting functions, leading to increased costs and energy consumption.
Innovation Solution
A lighting device with a single printed circuit board supporting two rows of light sources, where a single light guide performs multiple lighting functions, reducing the number of light sources and control members needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light sources and control members are used for different lighting functions, then lighting functionality is improved, but device complexity and cost increase
Solution Approach 1:
A single light guide is designed to perform multiple lighting functions (direct dynamic lighting, backlighting, and ambient lighting) by directing light from a single row of light sources to different exit faces. This eliminates the need for separate light guides for each function, reducing device complexity while maintaining lighting versatility.
Solution Approach 2:
Multiple lighting functions are merged into a single light guide structure. The light guide integrates different light transmission paths and exit faces, combining what would traditionally require separate components into one unified device, thereby reducing the overall number of components and control members needed.
2Adaptability or versatility
If multiple light sources are used for different lighting functions, then lighting functionality is improved, but energy consumption increases
Solution Approach 1:
A single row of light sources serves multiple lighting functions through one light guide, eliminating the need for separate light sources for each function. This reduces the total power consumption while maintaining the ability to provide direct dynamic lighting, backlighting, and ambient lighting through different exit faces of the same light guide.
3Adaptability or versatility
If multiple light guides are used for different lighting functions, then lighting functionality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple light guide functions into a single light guide structure with multiple exit faces. This unified design simplifies manufacturing by reducing the number of separate components that need to be produced, assembled, and aligned, while still providing multiple lighting functions through different exit faces of the same light guide.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for reduced component costs and energy consumption while maintaining multiple lighting functions, such as direct dynamic lighting, backlighting, and ambient lighting.
Implementation Method 1
Within the light guide, the propagation of the light rays is controlled in particular by internal reflections on different faces of the light guide.
Data Source
AI summary
An Interior-lighting device for a motor vehicle includes a carrier on which are placed a first row of light sources and a second row of light sources. The lighting device includes a first light guide that includes an evacuation face, light rays emitted by the first row of light sources being transmitted to the evacuation face. Also included is a second light guide that includes an entrance face, a first exit face and a second exit face, light rays emitted by the second row of light sources being transmitted to these first and second exit faces.