Angled Composite Diaphragm for Vehicle Headlight Light Distribution
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Solution Overview
Problem
Existing projection light modules for motor vehicle headlights have limitations in achieving complete high-beam functionality with minimal mechanically moving components, resulting in incomplete high-beam distributions and bothersome vertical bright-dark boundaries.
Innovation Solution
A projection light module with a rigid composite diaphragm where the low-beam and high-beam diaphragms are integrated, with the high-beam diaphragm arranged at an angle to the optical axis, allowing for increased distance from the optical axis and providing additional degrees of freedom in generating light distributions, utilizing semiconductor light sources and primary optics to concentrate light into specific regions for partial high-beam generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rigid composite diaphragm with integrated low-beam and high-beam diaphragms is used, then device complexity is reduced, but achieving complete high-beam functionality with proper light distribution becomes more difficult
Solution Approach 1:
The patent combines the low-beam diaphragm and high-beam diaphragm into a single rigid composite diaphragm structure. This merging reduces the number of separate mechanical components while maintaining the functional capabilities of both low-beam and high-beam modes, directly addressing the contradiction between reduced device complexity and preserved adaptability.
Solution Approach 2:
The high-beam diaphragm is arranged at an angle to the optical axis rather than perpendicular to it. This angular arrangement introduces a new dimensional orientation that enables complete high-beam functionality and proper light distribution while using a fixed, non-mechanically-adjusted structure, thus reducing mechanical complexity while maintaining versatility.
2Adaptability or versatility
If the high-beam diaphragm is arranged at an angle to the optical axis, then additional degrees of freedom in light distribution are achieved, but manufacturing precision requirements increase
Solution Approach 1:
The rigid composite diaphragm is pre-manufactured with the high-beam diaphragm already positioned at the precise required angle to the optical axis. This preliminary positioning during manufacturing eliminates the need for complex mechanical adjustment mechanisms during installation or operation, achieving accurate light distribution while managing manufacturing precision requirements through controlled fabrication processes.
3Illumination intensity
If semiconductor light sources with primary optics are used to concentrate light, then illuminance is enhanced and light loss minimized, but device complexity increases
Solution Approach 1:
The patent employs semiconductor light sources (LEDs) which inherently provide directional light emission compared to traditional bulb sources. By changing the light source parameter from omnidirectional to directional, the system achieves enhanced illuminance and reduced light loss without requiring complex additional optical components, as the LED's natural emission characteristics provide the necessary light concentration.
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
This configuration allows for variable and adaptable high-beam distributions with reduced mechanical complexity, minimizing light loss and enhancing illuminance, while reducing the visibility of the bright-dark boundary in full high-beam mode.
Implementation Method 1
primary optics that collects and focuses the light of the semiconductor light sources
Implementation Method 2
a secondary lens system, which is constructed and arranged to project an image of the inner light distribution as an external light distribution into the outside perimeter
Implementation Method 3
a low-beam light diaphragm which... separates the low-beam light volume located above this diaphragm from a high-beam volume
Data Source
AI summary
A projection light module for a motor vehicle headlight with a low-beam diaphragm, which separates a low-beam volume of the projection light module located above this diaphragm from a high-beam volume of the projection light volume located below this diaphragm, and with a high-beam diaphragm arranged in the high-beam volume, which has a vertical diaphragm edge and which divides the high-beam volume into a high-beam volume lying to the right of it and a high-beam volume lying left to it. The low-beam diaphragm and the high-beam diaphragm are components of a composite diaphragm and the high-beam diaphragm is arranged in the high-beam volume obliquely to the optical axis of the projection light module so that its distance from the optical axis of the projection light module increases with increasing distance along the optical axis from the diaphragm edge.