Headlamp Illuminance Calculation via Segmented Iterative Adjustment
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Solution Overview
Problem
Modern headlamps with numerous light sources face challenges in quickly calculating optimal illumination settings to avoid over-illumination, leading to increased energy consumption and longer calculation times.
Innovation Solution
A method and device that iteratively calculate illuminance setting values for each light source, dividing the illumination area into segments with homogeneous light distribution, and adjusting setting values in a sequence to achieve target illuminance levels without excessively illuminating pixels, thereby reducing energy consumption and calculation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to calculate illuminance setting values for headlamp light sources, then the desired light distribution can be achieved, but the calculation time becomes excessively long for headlamps with tens of thousands of light sources
Solution Approach 1:
The illumination area is divided into multiple segments, and the calculation is performed segment by segment rather than processing all pixels simultaneously. This segmentation allows the system to handle tens of thousands of light sources in manageable portions, significantly reducing calculation time while maintaining the accuracy of the overall light distribution
Solution Approach 2:
The method pre-calculates and stores the light contribution of each light source to each pixel in a lookup table before the actual illuminance calculation. This preliminary action avoids repeated complex calculations during the main computation, enabling rapid determination of setting values even for headlamps with tens of thousands of light sources
2Reliability
If conventional methods illuminate all points of the illumination area with minimum illuminance, then all points are adequately illuminated, but some points are illuminated much stronger than necessary causing increased energy consumption
Solution Approach 1:
The patent applies different illuminance settings to different regions of the illumination area based on their specific requirements. By calculating the contribution of each light source to each pixel and considering the overlap of light from multiple sources, the system determines precise setting values that provide adequate illumination only where needed, avoiding over-illumination in other areas and thereby reducing energy consumption
Solution Approach 2:
The iterative calculation method continuously adjusts the setting values of light sources based on the calculated illuminance at each pixel. The process repeats until the illuminance at all pixels meets the minimum requirement, providing feedback-driven optimization that prevents excessive illumination and minimizes energy consumption while ensuring complete coverage
Data Source
AI summary
A method is provided for calculating illumination setting values for light sources of a headlamp from a light distribution that is to be set. First, the light distribution that is to be set is read in. Then, the illuminance target values for pixels of an illumination area are calculated from the light distribution that is to be set, which are to be achieved by setting the light sources of the headlamp in order to set the read-in light distribution. Finally, the illuminance setting values for the light sources are calculated from the target values. Further, at least one illuminance setting value to which this light source is set is calculated iteratively for each light source of the headlamp.