Motor Vehicle Lighting Device with Light Guide Element in Reflector
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Solution Overview
Problem
Current lighting systems for motor vehicles are complex and expensive, with mutual influencing of light functions being a significant issue that affects their performance and safety.
Innovation Solution
A lighting device with a lens, reflector, and light guide element, where the light guide element is positioned in the reflector to prevent mutual interference between light functions, using prisms for light adjustment and a shading element to prevent unwanted light coupling, and a heat sink for efficient cooling, allowing for a compact and efficient design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple light functions are integrated in a compact lighting device, then space utilization is improved, but mutual interference between light functions occurs
Solution Approach 1:
The lighting device is segmented into separate functional modules: a first light module for main beam functions and a second light module for daytime running lights. Each module has its own light source and optical system, allowing independent control and preventing light interference while maintaining compact integration through shared housing and mounting structure.
Solution Approach 2:
A reflector is introduced as an intermediary optical element to redirect and separate light paths from different light modules. The reflector ensures that light from the first and second light modules travels along distinct trajectories, preventing mutual interference while enabling both functions to operate simultaneously within the same lighting device housing.
2Adaptability or versatility
If complex optical systems are used to achieve multiple light functions, then functional versatility is improved, but device complexity and cost increase
Solution Approach 1:
The lighting device employs universal components that serve multiple functions: a single housing structure accommodates both light modules, a shared reflector system directs light from both sources, and common mounting mechanisms install the entire assembly. This multi-functionality approach achieves versatile lighting capabilities without proportionally increasing device complexity or cost.
Solution Approach 2:
Multiple light functions are merged into a single integrated lighting device rather than using separate assemblies. The first light module (for low beam/high beam) and second light module (for daytime running lights) are combined within one housing, sharing common structural elements and mounting interfaces, thereby reducing overall complexity compared to separate installations.
3Length of stationary object
If light guide elements are positioned close to light sources, then compactness is improved, but light function interference increases
Solution Approach 1:
The reflector is designed with spatially varying properties: different sections have different reflectivity characteristics and angular orientations tailored to their specific functions. The local optical properties are optimized to direct light from each module along its intended path while preventing cross-interference, allowing compact positioning without sacrificing light function separation.
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 provides a simple, compact, and efficient lighting system with improved luminous efficacy, effective light distribution, and enhanced safety by preventing interference between light functions, while also simplifying production and assembly.
Implementation Method 1
a light guide element (24) to which a further light function is assigned
Implementation Method 2
a reflector (26) which at least partially surrounds the light exit area (34) in the immediate vicinity
Implementation Method 3
The lamp module (16) can include a heat sink, which is designed to cool illuminants of the first light function and/or illuminants of the second light function
Data Source
Figure 1
Figure 2~4
Figure 5~6
AI summary
The invention relates to a lighting device (10) for a motor vehicle, comprising a lamp module having a light emission region (34), to which at least one first light function is allocated, a reflector (26), which directly adjacently surrounds the light emission region (34), at least in part, and a light conductor element (24), to which an additional light function is allocated, wherein a coupling region of the light conductor element (24) is arranged in front of an illuminant (32) and a decoupling region of the light conductor element (24) is arranged in the reflector (26).