Adaptive Vehicle Headlamp Cutoff Lighting for Glare Suppression
Solution Overview
Problem
Existing vehicle headlamps struggle to provide sufficient visibility while effectively suppressing glare towards oncoming vehicles, leading to visual discomfort.
Innovation Solution
A vehicle headlamp system that projects a first light distribution pattern below a cutoff line and a second pattern along the cutoff line, with adjustable luminosity based on the position of target objects outside the vehicle, using multiple optical units with micro-LED elements for independent control of light intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminous intensity is increased to provide sufficient visibility, then the visibility is improved, but the glare toward oncoming vehicles increases causing visual discomfort
Solution Approach 1:
The headlamp is divided into multiple optical units (first optical unit, second optical unit, third optical unit) that can independently control light distribution in different regions. This segmentation allows the system to illuminate areas below the cutoff line for visibility while suppressing light above the cutoff line to prevent glare toward oncoming vehicles
Solution Approach 2:
Different regions of the light distribution are assigned different luminous intensity characteristics. The area below the cutoff line maintains high luminous intensity for visibility, while the area along and above the cutoff line has adjusted luminous intensity to suppress glare. This local differentiation resolves the contradiction between visibility and glare prevention
2Illumination intensity
If a fixed light distribution pattern is used to ensure sufficient visibility, then the visibility is maintained, but the adaptability to different driving conditions (oncoming vehicles, preceding vehicles, curves) is reduced
Solution Approach 1:
The headlamp system dynamically adjusts the luminous intensity of different optical units based on detected driving conditions. When an oncoming vehicle is detected, the second optical unit adjusts its light distribution along the cutoff line. When a preceding vehicle is detected, the third optical unit adjusts its light distribution above the cutoff line. This dynamic adjustment maintains visibility while adapting to various driving conditions
Solution Approach 2:
The system uses a detector to sense the presence and position of target objects (oncoming vehicles, preceding vehicles, curves) and feeds this information back to the controller. The controller then adjusts the luminous intensity of appropriate optical units based on this feedback, enabling adaptive light distribution that maintains visibility while preventing glare in different driving scenarios
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 sufficient visibility while preventing glare by dynamically adjusting light intensity, particularly for oncoming and preceding vehicles, enhancing safety and reducing visual discomfort.
Implementation Method 1
using multiple optical units with micro-LED elements for independent control of light intensity
Data Source
AI summary
A vehicle headlamp mounted on a vehicle is capable of forming at least a first light distribution pattern projected onto an area below a cutoff line and a second light distribution pattern projected along the cutoff line to overlap with the cutoff line. At least a partial projection area of the second light distribution pattern is adjusted in luminous intensity according to a position of a target object outside the vehicle.