Motor Vehicle Headlamp Projection Modules With Shifted Segments
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Solution Overview
Problem
Current motor vehicle headlight projection modules used for adaptive light distributions are large and cumbersome, failing to meet the demand for smaller, more flexible designs that can provide varying light outputs and resolutions while minimizing grid-like structures in light images.
Innovation Solution
The use of optically identical projection modules with laterally shifted segment light distributions, where each module's shift in the horizontal direction is proportional to its position, allowing for flexible arrangement and superimposition to achieve desired light distributions such as low beam, high beam, and highway light, using smaller modules to enhance resolution and luminous flux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If projection modules are made smaller to reduce size, then device compactness is improved, but resolution and luminous flux are reduced
Solution Approach 1:
The lighting device divides the light distribution into multiple independent light segments arranged in a grid pattern, where each segment can be controlled independently. This segmentation allows the system to achieve high resolution through multiple small segments rather than requiring a single large projection module, thus resolving the contradiction between module size and resolution.
Solution Approach 2:
Multiple projection modules are combined to form a single lighting device with enhanced capabilities. By merging the output of several smaller modules, the system achieves both compact individual module design and high overall resolution through the collective contribution of multiple units working together.
2Measurement precision
If multiple projection modules are used to increase resolution, then light distribution precision is improved, but device complexity increases
Solution Approach 1:
All projection modules in the array are designed to be optically identical, performing the same function with the same optical characteristics. This universality simplifies the design and control system compared to having specialized modules for different functions, as the same module type can be used throughout the array with standardized control protocols.
Solution Approach 2:
While the modules themselves are identical, their positions and orientations in the array are optimized to create specific light distribution patterns. Each module contributes locally to the overall light distribution, with their individual outputs combined to achieve the desired precision in different regions of the light field.
3Shape
If light segments are arranged to eliminate grid structures, then visual appearance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The system introduces controlled asymmetry in the arrangement of light segments, where segments are positioned to create overlapping patterns that naturally eliminate grid structures. By deliberately designing asymmetric positioning within the overall symmetric array, the system achieves uniform light images without requiring perfect manufacturing precision.
Solution Approach 2:
The solution moves from a two-dimensional grid arrangement to a three-dimensional configuration by introducing vertical stacking of light segments. This dimensional change allows the system to eliminate horizontal grid structures by distributing light segments across multiple vertical levels, thereby achieving uniform illumination without stringent manufacturing precision requirements.
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 approach enables the creation of adaptive light distributions with higher resolution and luminous intensity, accommodating different customer requirements by using smaller, more flexible projection modules that can be arranged to produce various light patterns without the undesirable grid structure, thus improving the performance and design of motor vehicle headlights.
Implementation Method 1
each of the projection modules (10, 20) has a light source (100, 200) and a projection lens (12, 22), wherein the light source (100, 200) generates a light segment (SEG10, SEG20), which is projected by the projection lens (12, 22)
Data Source
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AI summary
The invention relates to a lighting device (1) for a motor vehicle headlight for generating a light pattern (LV), particularly an adaptive light pattern, for example an adaptive dipped headlight and main beam light pattern, or a part of a light pattern of this kind, wherein the lighting device comprises a number N of preferably identical projection modules (10, 20), where N = 2, 3, 4 or greater than 4, each of the projection modules (10, 20) being designed to generate a segment light pattern (LV10, LV20). The projection modules (10, 20) are arranged with respect to one another in such a manner that, proceeding from a first projection module (10), known as the starting projection module (10), which generates what is called the starting segment light pattern (LV10), the segment light patterns (LV20; LV20, LV30) of the further projection modules (20) are displaced laterally in a, particularly in a common, horizontal direction, with the extent of the displacement, VSh, of the n-th segment light pattern (LV20; LV20, LV30) of the n-th projection module (20) in said horizontal direction being proportional to (n – 1)/N times the principal segment width, BR, where n = 2, …, N, and with at least one of the n-th segment light patterns (LV20; LV10, LV20, LV30), n = 2,..., N, being displaced upwards or downwards vertically in respect of the starting segment light pattern (LV10).