Vehicle Headlight Optical Axis Tilting for Adaptive Illumination
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Solution Overview
Problem
Conventional headlight systems require manual switching between dipped-beam and main-beam functions, leading to driver distraction and potential blinding of other traffic participants, as they lack adaptive mechanisms to adjust light distribution based on detected traffic participants.
Innovation Solution
A headlight assembly with a control device that tilts the optical axes of the headlight units horizontally and vertically to adapt light distribution, detecting traffic participants and adjusting the light range and angle to avoid blinding, while intersecting optical axes in front of the vehicle for optimal illumination during the main-beam function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual switching between dipped-beam and main-beam functions is used, then the driver can control light distribution, but driver distraction occurs and security relevant information may be missed
Solution Approach 1:
The headlight assembly automatically detects traffic participants and adjusts its own light distribution without driver intervention. The control device autonomously switches between dipped-beam and main-beam functions based on detected traffic participant positions, making the system self-regulating and eliminating the need for manual switching.
Solution Approach 2:
The system continuously monitors the positions of traffic participants using detection devices and uses this feedback information to dynamically adjust the light distribution. The control device receives real-time data about traffic participant locations and automatically modifies the optical axis orientation and light range accordingly.
2Illumination intensity
If main-beam function is used to illuminate the traffic zone, then broad illumination coverage is achieved, but other traffic participants are blinded
Solution Approach 1:
The headlight assembly applies different light distribution characteristics to different spatial zones. When traffic participants are detected, the system creates localized dark zones in their direction while maintaining full illumination in other areas. The optical axis is tilted away from detected traffic participants, providing high illumination intensity where needed while creating local dark zones to avoid blinding.
Solution Approach 2:
The headlight system dynamically adjusts its light distribution pattern based on real-time detection of traffic participant positions. The optical axis orientation and light range are continuously modified according to the detected positions, allowing the system to adapt between broad main-beam illumination and localized dipped-beam patterns as traffic conditions change.
3Object-affected harmful factors
If optical axes are tilted away from one another for dipped-beam function, then blinding of other traffic participants is prevented, but illumination coverage is reduced
Solution Approach 1:
The system dynamically adjusts the optical axis orientation based on detected traffic participant positions. When no traffic participants are detected, the optical axes are oriented for maximum coverage. When traffic participants are detected, the optical axes are tilted away from their positions, and the light range is adjusted to maintain adequate illumination while avoiding blinding.
Solution Approach 2:
The system performs preliminary detection of traffic participants before adjusting the light distribution. By detecting traffic participant positions in advance, the control device can pre-adjust the optical axis orientation and light range to prevent blinding while maintaining optimal illumination coverage for the driver's view of the roadway.
4Reliability
If automatic detection and adjustment of light distribution is implemented, then driver distraction is eliminated, but device complexity increases
Solution Approach 1:
The control device performs multiple functions: it controls the tilting of the optical axes, adjusts the light range, and manages the switching between dipped-beam and main-beam functions. By consolidating these control functions into a single multi-functional control device, the system achieves automatic adaptation without proportionally increasing overall system complexity.
Data Source
AI summary
In a method for controlling a headlight assembly for a vehicle (10) with a right and a left headlight unit (1, 2), for a dipped-beam function, the optical axes (L1, L2) of the headlight units (1, 2) are tilted away from one another horizontally relative to a parallel direction. According to the method for a main-beam function, the optical axes (L1, L2) of the headlight units (1, 2) are tilted toward one another horizontally relative to a parallel direction. A respective headlight assembly can be particularly suitable for carrying out the method.