Adaptive Headlight Controller Segmented Beam Control
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Solution Overview
Problem
Conventional vehicle headlight systems with adaptive driving beams (ADB) face challenges in maintaining optimal light distribution patterns at night, often resulting in glare to oncoming vehicles and forward-moving vehicles due to frequent switching between high and low beams, which degrades visibility and increases the burden on drivers.
Innovation Solution
A headlight controller system that projects multiple light-emitting patterns in horizontal areas, allowing for independent control of adjacent patterns without gaps, with edge portions as non-overlapping regions and middle portions as overlapping regions, using a camera and vehicle detector to adjust light distribution based on traffic conditions, and incorporating LED optical units for reliable and efficient light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high beam headlights are used to improve visibility at night, then visibility is improved, but glare is emitted to oncoming vehicles and forward-moving vehicles
Solution Approach 1:
The headlight beam is segmented into multiple independent light-emitting patterns (first through fourth patterns) that can be controlled separately. This allows the system to illuminate different road regions independently, providing high visibility where needed while avoiding glare to other vehicles by selectively activating only appropriate light patterns based on detected vehicle positions.
Solution Approach 2:
The light distribution pattern is dynamically adjusted based on real-time detection of oncoming and forward-moving vehicles. The controller selectively activates different light-emitting patterns depending on the presence and position of other vehicles, transitioning between high-beam and low-beam configurations to maintain visibility while preventing glare.
2Object-affected harmful factors
If low beam headlights are used to avoid glare to other vehicles, then glare is prevented, but visibility is degraded
Solution Approach 1:
Instead of using a single low-beam pattern, the system segments the light distribution into multiple patterns including both low-beam and high-beam configurations. This allows selective activation of high-beam patterns in regions where no other vehicles are present, thereby maintaining visibility without causing glare to other vehicles.
Solution Approach 2:
Different light intensity and distribution characteristics are applied to different spatial regions. High-intensity high-beam illumination is provided in regions free of other vehicles, while low-intensity illumination is directed toward regions where oncoming or forward-moving vehicles are detected, optimizing both visibility and glare prevention locally.
3Object-affected harmful factors
If frequent switching between high beam and low beam is performed to adapt to traffic conditions, then glare is avoided, but driver burden increases and operation complexity increases
Solution Approach 1:
The headlight system performs automatic beam switching based on vehicle-to-vehicle distance and position detection. The controller autonomously selects and activates appropriate light-emitting patterns without requiring manual driver intervention, thereby eliminating the burden of frequent switching operations while maintaining glare prevention and visibility optimization.
Solution Approach 2:
The system continuously detects the positions of oncoming and forward-moving vehicles and uses this feedback to automatically adjust the light distribution pattern. This closed-loop control enables the headlights to adapt to changing traffic conditions in real-time without driver input, reducing operational complexity while maintaining safety and visibility.
4Illumination intensity
If ADB technology is used to improve visibility and prevent glare, then visibility is improved and glare is reduced, but device complexity increases due to multiple light-emitting patterns and control systems
Solution Approach 1:
The headlight system uses a single optical unit capable of emitting multiple light patterns (first through fourth patterns) with different distribution characteristics. This multi-functional approach eliminates the need for separate physical light sources for high-beam and low-beam operations, reducing structural complexity while maintaining the ability to provide both high visibility and glare prevention through software-controlled pattern selection.
Data Source
AI summary
A headlight controller and a vehicle headlight system including an ADB can include a headlight controller and an optical unit. The headlight controller can include a system controller, a vehicle detector and a camera photographing forward vehicles located in a travelling direction of a subject vehicle, and the system controller can be configured to output a light-emitting control signal to provide favorable light distribution patterns by using vehicle data output from the vehicle detector in accordance with image data output from the camera. The optical unit can be configured to provide the favorable light distribution patterns using lights emitted from a right and left light-emitting device in accordance with the light-emitting control signal. Thus, the disclosed subject matter can include providing vehicle headlight systems that can form various favorable light distribution patterns by utilizing the characteristics of the headlight controller and the optical unit in accordance with various traffic conditions.