Vehicle Headlamp Lighting Device with Dual Reflectors
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Solution Overview
Problem
Current motor vehicle headlight designs lack flexibility in achieving defined and adaptable light distributions while maintaining legal compliance.
Innovation Solution
A lighting device comprising a first laser light source, a light shaping device, a first reflector with a focal point, a second reflector with a focal point, and an additional LED light source arrangement on the second reflector, which allows for variable light distribution by directing light beams through a lens for a desired exit direction, creating a central and edge area light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light source arrangement is used, then the device complexity is reduced, but the adaptability of light distribution is insufficient
Solution Approach 1:
The patent implements multi-functionality by integrating two different light source arrangements (laser-based and LED-based) into a single lighting device. The first light source arrangement with laser device and light conversion element handles central area illumination, while the second light source arrangement with LED handles edge area illumination. This allows the device to perform multiple lighting functions (high beam, low beam, fog light, daytime running light) and adapt to different lighting conditions, thereby improving light distribution adaptability while managing device complexity through functional integration.
2Illumination intensity
If laser light source is used, then the luminance is high, but the energy consumption increases
Solution Approach 1:
The patent applies local quality by using different light source types for different spatial regions. The laser-based first light source arrangement is used specifically for the central area where high luminance is required for long-distance illumination, while the LED-based second light source arrangement is used for the edge area with lower energy requirements. This localized application of high-performance laser technology only where needed maximizes luminance output while minimizing overall energy consumption of the lighting device.
3Adaptability or versatility
If multiple reflectors are used, then the light distribution is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent introduces a light shaping device as an intermediary component between the first light source arrangement and the first reflector. This light shaping device prepares and conditions the light beams before they reach the reflector system, reducing the precision requirements for reflector alignment and manufacturing. The light shaping device acts as a mediator that simplifies the overall optical system tolerance requirements while maintaining improved light distribution through the multiple reflector configuration.
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
Enables high luminance and adaptable light distribution with high luminous flux, meeting legal requirements for various light functions such as high beam, low beam, fog light, and daytime running light, while ensuring safety features like passive and active safety systems.
Implementation Method 1
at least one laser device and at least one luminous surface having a light conversion element
Implementation Method 2
the first reflector deflects the light beams bundled in the first focal point onto the second reflector
Implementation Method 3
the light beams reflected by the second reflector are ejected in a desired exit direction
Implementation Method 4
a lens positioned in the exit opening of the second reflector for the use of a common projection of the first and second light source arrangement
Data Source
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AI summary
A lighting device (1) comprising: – a first light source arrangement (2), a light shaping device (3) disposed downstream of the first light source arrangement (2), – a first reflector (4, 4') having a first focus (f1) and a second reflector (5, 5') having a second focus (f2), – an additional second light source arrangement (6) that is disposed on the outside at the second reflector (5, 5'), wherein a cut-out is provided at the second reflector (5, 5') to this end, and – a closure pane (8) that is positioned in the exit opening of the second reflector (5, 5'), wherein the light that was emitted by the first light source arrangement (2) is directed to the first reflector (4, 4') via the light shaping device (3), wherein the first reflector (4, 4') deflects the light beams onto the second reflector (5, 5') and the light beams reflected by the second reflector (5, 5') are cast in the form of a defined light distribution in a desired exit direction through the closure pane (8), wherein the second light source arrangement (6) casts an additional light output in the desired exit direction.