Vehicle Headlight Control for Construction Site Glare Reduction
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Solution Overview
Problem
Driving on a construction site at night poses challenges due to poor visibility and blinding from reflective objects, making it difficult to recognize road markings and exits, which increases the risk of accidents.
Innovation Solution
The method involves increasing the light intensity of the low beam and shifting the focal point or expanding the area illuminated when an exit is detected, while reducing or deactivating the high beam to minimize blinding from reflective objects, using camera images, radar systems, and vehicle-to-X communication for reliable construction site detection, and adjusting light intensity based on road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light intensity of the low beam is increased to improve visibility of road markings and exits, then the visibility is improved, but the blinding effect from reflective objects increases
Solution Approach 1:
The lighting system is divided into separate controllable zones: the low beam is intensified for road marking illumination while the high beam is reduced or deactivated to minimize reflection from overhead objects. Individual LED pixels or zones within the headlight assembly can be independently controlled to achieve selective illumination patterns that address different visibility needs without compounding glare problems.
Solution Approach 2:
Different regions of the light output are given different properties: the low beam region is optimized for high intensity to illuminate dark road markings and exits, while the high beam region is reduced or shaped to avoid illuminating reflective surfaces overhead. The light distribution is non-uniform, with specific zones enhanced or suppressed based on their functional requirements.
2Illumination intensity
If the high beam is used to increase the range and brightness of light, then the driver can see further, but the blinding effect from reflective objects such as traffic signs and warning beacons increases
Solution Approach 1:
The harmful high beam component is extracted or removed from the lighting system when operating in construction zones. The system selectively deactivates or reduces the high beam LEDs while maintaining the low beam function, thereby eliminating the source of excessive reflection from overhead objects while preserving necessary road illumination.
Solution Approach 2:
The lighting system dynamically adjusts its output based on environmental conditions and vehicle position. When a construction zone is detected via GPS, camera, or radar, the system automatically transitions from high beam to low beam dominance, and can further adjust intensity based on detected reflective objects or road conditions, creating a adaptive lighting behavior that responds to changing hazards.
3Illumination intensity
If the light output is increased to illuminate the edge of the roadway, then the driver can better perceive road edges, but more light is reflected onto traffic signs and warning beacons causing increased glare
Solution Approach 1:
The illumination strategy shifts from a single upward-directed beam to a multi-dimensional lighting approach. The low beam is optimized with a specific angular distribution that emphasizes lateral illumination of road edges while minimizing vertical component that would reflect off overhead signs. Additional lateral lighting elements or adjusted beam patterns illuminate the roadway perimeter without pointing light at reflective objects above.
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
This method enhances visual perception and safety by clearly illuminating road markings and exits, reducing the risk of unintentional exit passing and blinding from reflective objects, while maintaining safe operation of vehicles on construction sites.
Implementation Method 1
Modern vehicles use LEDs as light sources, particularly in the form of matrix headlights
Implementation Method 2
A relatively high number of reflective objects in the environment, such as traffic signs and/or warning beacons, reflect light emitted by the vehicle's lights back towards the driver due to their retroreflective coating
Data Source
Figure 1
AI summary
The invention relates to a method for adjusting a vehicle lighting system when driving on a construction site (1), in which method a light image (3) cast by at least one vehicle headlight (2) into a surrounding area is, upon detection of driving on a construction site (1), adjusted from an upper light field (3.1) referred to as full beam and a lower light field (3.2) referred to as dipped beam by changing a light intensity with which the light image (3) is generated. The method according to the invention is characterised in that the light intensity with which the dipped beam is emitted is increased to a fixed value when driving on the construction site (1).