Two-Chamber LED Headlamp Reflection System
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Solution Overview
Problem
Conventional motor vehicle headlamps using LED semiconductor light sources struggle to provide both high-quality dimmed and non-dimmed light distributions with efficient light volume and glare avoidance, often requiring expensive projection lenses and limited by the contribution of only outer reflectors in low-beam light generation.
Innovation Solution
A motor vehicle headlamp design featuring two reflection modules with offset groups of LED chips and a control circuit that activates specific LED chip combinations to generate both high-beam and low-beam light distributions, utilizing both reflector modules for each distribution type, thereby achieving optimized light patterns without expensive optics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If projection lenses are used to generate light distribution, then light distribution quality is improved, but cost and weight increase
Solution Approach 1:
The headlamp is divided into two independent reflection modules, each capable of generating complete light distributions. This segmentation allows the system to achieve high-quality light distribution through optimized reflector geometries rather than relying on expensive projection lenses, thereby reducing cost and weight while maintaining manufacturing precision
Solution Approach 2:
The patent replaces the optical projection lens system with a reflection-based system using precisely shaped reflectors. This substitution eliminates heavy glass lenses and complex optical assemblies, reducing weight and cost while achieving comparable or superior light distribution quality through geometric reflection principles
2Device complexity
If only outer reflectors are used for low-beam light generation, then device complexity is reduced, but light volume and illumination quality deteriorate
Solution Approach 1:
Both inner and outer reflectors are merged into a coordinated system where each reflector module can independently generate complete light distributions. The control unit combines the output of both reflectors to achieve superior illumination quality and light volume that exceeds what either reflector could provide alone, while maintaining a relatively simple overall structure
Solution Approach 2:
Each reflection module is designed to be universal and self-sufficient, capable of generating both low-beam and high-beam light distributions independently. This multi-functionality allows both reflectors to contribute to low-beam illumination, maximizing light volume and quality without adding complex additional components
3Device complexity
If LED chips are arranged in a single group, then device complexity is reduced, but the ability to generate both dimmed and non-dimmed light distributions deteriorates
Solution Approach 1:
The LED chips are segmented into multiple groups (first, second, third, fourth groups) arranged in offset positions. This segmentation enables the control unit to selectively activate different LED groups to generate either dimmed or non-dimmed light distributions, providing versatility without requiring complex additional components
Solution Approach 2:
The system dynamically switches between different LED chip group configurations to adapt to different lighting requirements. The control unit can activate specific LED groups based on whether low-beam or high-beam illumination is needed, providing adaptability through dynamic control rather than through complex static hardware configurations
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 design enables the generation of high-brightness, wide lateral illumination with sharp light/dark borders for low-beam and homogeneous diffusion for high-beam, while maintaining an attractive signal image and reducing glare, all at a lower cost by using a reflection system without heavy projection optics.
Implementation Method 1
The motor vehicle headlamp according to the invention is an LED headlamp
Implementation Method 2
which generates a low-beam light distribution with a reflection system
Data Source
AI summary
A motor vehicle headlamp having a first reflection module, including a first reflector, a first group of LED chips and a second group of LED chips, having a second reflection module, which comprises a second reflector, a third group of LED chips and a fourth group of LED chips, and having a control circuit, which is configured to control the current flow through the light emitting diodes, and which is configured to activate the LED chips of the first group together with the LED chips of the fourth group, wherein the LED chips of the second group and the LED chips of the third group are deactivated. The control circuit activates the LED chips of the second group together with the LED chips of the third group, wherein the LED chips of the first group and the LED chips of the fourth group are deactivated.