Automotive Matrix Headlight Control for Predictive Bending Light
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Solution Overview
Problem
Existing Dynamic Bending Light (DBL) systems in automotive lighting rely on mechanical solutions that turn the lighting source based on the steering wheel motion, which can be inefficient and fail to adapt to various driving conditions.
Innovation Solution
A method for controlling a light pattern using a matrix arrangement of light pixels, where road features are extracted to assign shifting values to row groups, dividing each group into portions and adjusting luminous intensity values to provide a focused light pattern without moving parts, adapting to driving circumstances like speed and oncoming traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanical solutions are used to turn the lighting source based on steering wheel motion, then the lights can illuminate the road during turns, but the system complexity increases and adaptability to different driving conditions decreases
Solution Approach 1:
The patent replaces the mechanical steering wheel-based system with an electronic control system that uses a camera to detect road curvature. The control unit processes image data to determine the road profile and calculates shifting values for each row group of the LED matrix, eliminating mechanical moving parts while improving adaptability to various driving conditions including speed and road geometry
Solution Approach 2:
The system dynamically changes the light pattern by applying different shifting values to row groups based on detected road features. The control unit modifies the activation state of individual LED pixels in each row group, creating a predictive bending light effect that adapts to real-time road conditions rather than following steering wheel position
2Illumination intensity
If the light pattern is shifted uniformly across all rows, then the implementation is simpler, but the light focus on the road is reduced
Solution Approach 1:
The LED matrix is divided into multiple row groups, where each row group can be independently controlled with its own shifting value. This segmentation allows different portions of the light pattern to be shifted by different amounts, concentrating the light precisely on the road ahead while maintaining manageable control complexity through systematic processing of each row group
Solution Approach 2:
Different shifting values are applied to different row groups based on their specific position and the detected road profile. The control unit calculates optimal shifting values for each row group to maximize light concentration on the road surface, creating localized optimization rather than uniform shifting across the entire matrix
Data Source
AI summary
A method for controlling a light pattern provided by an automotive lighting device of an automotive vehicle. The method includes providing a road profile, extracting road features from the road profile, dividing the matrix arrangement in row groups, assigning a different shifting value for each row group, each shifting value depending on the road features and dividing each row group in at least a first portion and a second portion. Each portion includes at least a boundary pixel which is in contact with the boundary pixel of an adjacent portion. The method further includes modifying the width of the first portion and the width of the second portion by shifting the position of the boundary pixels in each row group according to the corresponding shifting value and interpolating the luminous intensity values of the pixels belonging to the first and second portion.