Vehicle Headlight Position-Dependent Control for Homogeneous Light Distribution
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Solution Overview
Problem
Current motor vehicle headlights provide a wide, inhomogeneous light distribution that can cause dazzling and pronounced light-dark boundaries, failing to adapt effectively to different driving conditions and road users.
Innovation Solution
A headlight system with multiple light-emitting elements arranged along its extent, featuring a control device that sets maximum operating values for each element based on position, ensuring illuminance levels are not exceeded, allowing for adjustable light distributions with higher values in the main beam area and lower values in edge areas, preventing blinding and providing a homogeneous light pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a wide light distribution is provided with multiple light-emitting elements, then the illumination coverage is improved, but disturbing inhomogeneities and pronounced light-dark boundaries occur
Solution Approach 1:
The patent applies local quality by assigning different maximum operating values to different light-emitting elements based on their positions. Central elements have higher maximum values while edge elements have lower maximum values, creating a gradient that compensates for the inherent inhomogeneity of wide light distributions and eliminates pronounced light-dark boundaries at edges
2Adaptability or versatility
If individual light-emitting elements are controlled to provide different light distributions, then adaptability to different driving conditions is improved, but the complexity of the control system increases
Solution Approach 1:
The control system is segmented by assigning specific control functions to individual light-emitting elements or groups of elements. Each element can be independently controlled with its own maximum operating value, allowing the system to provide different light distributions (low beam, high beam, adaptive high beam) by selectively activating elements while maintaining manageable control complexity through modular organization
Solution Approach 2:
The system implements dynamic control by allowing the control device to adjust which light-emitting elements are activated and at what operating values based on detected driving conditions. The maximum operating values can be dynamically adapted, and elements can be selectively switched on or off to provide appropriate light distributions for different situations
3Illumination intensity
If higher illuminance values are used in the main beam area, then the visibility for the vehicle is improved, but dazzling to oncoming traffic increases
Solution Approach 1:
The patent applies local quality by establishing position-dependent maximum operating values where central elements (main beam area) have higher maximum values for improved visibility, while edge elements have lower maximum values to reduce dazzling. This spatial differentiation allows the system to simultaneously achieve high main beam intensity and reduced harmful effects to oncoming traffic
Solution Approach 2:
The system uses feedback from object detection devices to dynamically adjust the operating values of light-emitting elements. When oncoming traffic or road users are detected, the control device reduces the operating values of elements that would cause dazzling, while maintaining appropriate illumination in the main beam area, thus adaptively resolving the contradiction between visibility and dazzling prevention
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
The system ensures reliable and safe operation by preventing dazzling and providing a homogeneous light distribution, reducing light-dark boundaries and allowing adaptive adjustments based on detected objects, ensuring safe illumination for both the vehicle and oncoming traffic.
Implementation Method 1
a plurality of light-emitting elements (14), which are arranged next to one another along a direction (16) in which the headlight (12) extends
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a headlight (12) for a motor vehicle (10), comprising a plurality of lighting elements (14) which are arranged one behind the other along a direction of extension (16) of the headlight (12) and comprising a controller for actuating the plurality of lighting elements (14) in order to provide at least one light distribution using the headlight (12). A maximum value (20) for an operating variable (22), with which the lighting element (14) can be maximally operated when providing the at least one light distribution, is stored in the controller for each of the lighting elements (14) dependent on the position of the lighting element (14) along the direction of extension of the headlight (12) irrespective of the at least one light distribution, an illuminance of each lighting element (14) being adjustable using the operating variable (22).