Dual Matrix Lighting Device Vertical Offset Resolution
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Solution Overview
Problem
Current lighting devices for motor vehicles with adaptive driving beam (ADB) functions face limitations in reducing pixel size due to high costs and low optical efficiency, which restricts the ability to achieve high vertical resolution and comfort in road illumination while preventing dazzling.
Innovation Solution
A lighting device comprising two separate modules projecting matrices of juxtaposed light pixels with a vertical offset, allowing for independent activation of each pixel, resulting in higher vertical resolution and maintained luminous efficiency, while distributing heat and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size of luminous pixels is reduced to improve vertical resolution, then the ability to illuminate road areas above and below shadow zones is improved, but manufacturing costs increase significantly and optical efficiency decreases below 20%
Solution Approach 1:
The lighting device is divided into two separate modules (first and second modules), each projecting a matrix of light pixels. This segmentation allows each module to use larger, more cost-effective pixels while achieving high overall resolution through the superposition of the two matrices with vertical offset.
Solution Approach 2:
The patent introduces a vertical offset dimension between the two pixel matrices. The second matrix is vertically shifted relative to the first matrix by an offset distance less than the pixel height, creating a combined high-resolution pattern without requiring individually smaller pixels in each matrix.
2Manufacturing precision
If the size of luminous pixels is reduced to improve vertical resolution, then the ability to perform regulatory cut-off light function is improved, but optical efficiency decreases below 20%
Solution Approach 1:
By segmenting the lighting system into two modules with larger pixels, each module maintains high optical efficiency (>20% per module) while the combined system achieves high vertical resolution for precise cut-off line positioning and oblique section production.
Solution Approach 2:
The vertical offset between matrices adds a dimensional layer that enables high-resolution cut-off functions without requiring smaller pixels, thereby preserving optical efficiency while achieving the desired precision for regulatory lighting functions.
3Device complexity
If a single lighting module is used, then device complexity is reduced, but heat dissipation becomes problematic and manufacturing costs increase for achieving high resolution
Solution Approach 1:
The lighting device is segmented into two separate modules, which distributes the heat generation and dissipation across both modules. This segmentation enables effective thermal management while maintaining manageable device complexity through modular architecture.
Data Source
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AI summary
The invention relates to a lighting device (12) for a motor vehicle (10) comprising a first lighting module (20) projecting at least one first matrix (24) of independently activatable juxtaposed first pixels (26), the first pixels (26) being arranged in several vertical columns (28) and in at least one transverse line (30) of determined height (Dh), characterized in that it comprises a second lighting module (22) projecting a second matrix (36) of independently activatable juxtaposed second pixels (38), the second pixels (38) being arranged in at least one transverse line (42), the second matrix (36) being superimposed with the first matrix (24) with a vertical offset of a vertical offset distance (P) less than said height (Dh) determined with respect to the first pixels (26) of the first matrix (24).