Motor Vehicle Headlamp Symbol Projection for Higher Contrast
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Solution Overview
Problem
Existing headlamp technologies fail to optimize the projection of symbols, such as traffic signs, for maximum recognition by users due to inadequate contrast, especially when pixels are represented by multiple light sources, leading to reduced visibility.
Innovation Solution
A method that determines the luminous intensity for each light source in a headlamp by adjusting the position and size of the projection symbol, comparing indicators of luminous intensity differences, and iteratively optimizing these settings to enhance contrast, allowing for better representation of symbols by ensuring each pixel is represented by the appropriate light source intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the projection symbol is displayed using multiple light sources to cover a larger area, then the coverage area is improved, but the contrast of the projection symbol is reduced
Solution Approach 1:
The patent applies local quality by assigning different luminous intensities to different light sources based on their specific position and the symbol pixels they represent. Each light source's intensity is individually optimized to maintain high contrast while covering the required area, rather than using uniform intensity across all light sources.
Solution Approach 2:
The patent implements dynamics by iteratively adjusting the position and size of the projection symbol, and dynamically modifying the luminous intensity of each light source based on calculated indicators. This dynamic optimization process continues until the best contrast is achieved, allowing the system to adapt to different display conditions.
2Device complexity
If the position and size of the projection symbol are fixed, then the device complexity is reduced, but the recognition quality of the symbol is worsened
Solution Approach 1:
The patent applies preliminary action by pre-calculating the optimal position and size of the projection symbol before actual display. The system determines the best configuration in advance by evaluating multiple possibilities and selecting the one that maximizes recognition quality, rather than adjusting in real-time during display.
Solution Approach 2:
The system performs self-service by automatically optimizing its own projection parameters without external intervention. The control unit independently calculates the optimal luminous intensities and symbol positioning based on the given requirements, making the system self-configuring and reducing external control complexity.
Data Source
AI summary
A method for controlling a headlamp of a motor vehicle, the headlamp comprising a plurality of light sources. A projection symbol to be projected by the headlamp and a position and a size of the projection symbol are determined. A respective first luminous intensity for the light sources for the projection of the projection symbol at the position with the size and a first indicator, which contains an indication of how greatly the individual first luminous intensities differ from one another are determined. The position and/or the size of the projection symbol is changed. A respective second luminous intensity for the light sources for the projection of the projection symbol at the changed position and/or with the changed size and a second indicator, which contains an indication of how greatly the individual second luminous intensities differ from one another are determined. The projection symbol subsequently projected.