Motor Vehicle Lighting Device With Segmented Reflector And Light Guide
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Solution Overview
Problem
Current motor vehicle lighting systems lack a distinctive and recognizable luminous signature both day and night, and struggle to meet varying light intensity requirements for main beam and daytime running lights, as existing reflectors are not adaptable for high-intensity and low-intensity light distributions simultaneously.
Innovation Solution
A lighting device comprising a reflector and a light guide with a third light source, allowing for the generation of daytime running and main beam light distributions, where the light guide contributes to fulfilling the daytime signaling function and the reflector serves both daytime and main beam configurations, achieving a distinctive and recognizable signature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reflector is used for both main beam and daytime running lights, then the device complexity is reduced, but the adaptability to different light intensity requirements deteriorates
Solution Approach 1:
The reflector is divided into multiple facets with different reflective properties. First-type facets are optimized for main beam light distribution while second-type facets are optimized for daytime running light distribution. This segmentation allows a single reflector structure to adapt to different light intensity requirements by selectively activating different facet types based on the operating mode.
2Adaptability or versatility
If alternating types of reflective facets are used in the reflector, then the adaptability to different light distributions is improved, but the main beam light intensity deteriorates
Solution Approach 1:
The lighting system dynamically controls which light sources are activated based on the required function. For main beam operation, only the first light source is activated to maximize intensity. For daytime running lights, only the second light source is activated. This dynamic activation pattern allows the alternating facet structure to achieve both high-intensity main beam and low-intensity daytime running light distributions without compromising either function.
3Ease of manufacture
If the same reflector is used for both daytime and night configurations, then the manufacturing cost is reduced, but the light signature distinctiveness deteriorates
Solution Approach 1:
Different regions (facets) of the reflector are given different optical qualities tailored to specific functions. First-type facets have geometric properties optimized for main beam projection, while second-type facets have properties optimized for daytime running light patterns. This local differentiation of facet qualities enables the single reflector to produce distinct and recognizable light signatures for different operating modes while maintaining manufacturing efficiency.
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 enables a compromise between light contributions from different sources, ensuring compliance with regulatory light intensity standards and providing a recognizable vehicle identity through a unique light signature, enhancing visibility and safety.
Implementation Method 1
the light emitted by said at least one first light source is reflected by the reflector and when the light emitted by said at least one second light source is reflected by the reflector
Implementation Method 2
the light emitted by said at least one third light source is transmitted by said at least one light guide
Data Source
Figure 1~2
Figure 3a~3b
Figure 4a~6
AI summary
The invention relates to a lighting device for a motor vehicle, and more particularly to such a device comprising: - first and second light sources arranged together with a light reflector 4, - a third light source arranged together with a light guide 5, to generate: - a daytime running light distribution when the light from the first source is reflected by the reflector and when the light from the third source is transmitted by the guide, and - a high beam distribution when the light from the second source is reflected by the reflector. The reflector performs the functions of both daytime running light and high beam, and the light guide contributes to fulfilling the daytime running light function. The resulting light signature is advantageously distinctive and recognizable both day and night.