Vehicle Headlamp Light Distribution Control for Glare Prevention
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Solution Overview
Problem
Existing lighting control systems for vehicles cannot effectively calculate and control the light distribution pattern with respect to the upward/downward direction of a preceding or oncoming vehicle, limiting their ability to avoid glare and provide a comfortable view for the driver.
Innovation Solution
A lighting control device and method that includes a vehicle model information acquisition section, a distance detection section, and a light distribution controller, which acquires vehicle model information and detects the distance between the vehicle and the host vehicle to control the light distribution pattern of the headlamps, specifically deriving the light shielding range and angles to avoid glare by adjusting the light distribution based on the vehicle's height and distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light shielding is performed only in the leftward/rightward direction based on sensor data, then the horizontal glare prevention is improved, but the vertical light distribution control with respect to the upward/downward direction of the vehicle located in front cannot be achieved
Solution Approach 1:
The patent extends the light shielding control from a single horizontal dimension to a two-dimensional space by incorporating vertical angle calculation. The control device calculates both the azimuth angle (horizontal direction) and the angle of inclination (vertical direction) to define a three-dimensional light shielding range, enabling comprehensive control in both leftward/rightward and upward/downward directions simultaneously.
Solution Approach 2:
The lighting control device is designed to perform multiple functions: it calculates the position of the vehicle located in front, determines the light shielding range in horizontal direction, and simultaneously calculates the angle of inclination to control light distribution in the vertical direction. This multi-functional approach allows a single system to address both horizontal and vertical glare prevention needs.
2Ease of operation
If the light distribution is controlled based on vehicle height and distance, then the comfort view for the driver is improved, but the complexity of the control system increases due to multiple parameters
Solution Approach 1:
The system automatically acquires vehicle model information including vehicle height from databases or sensors, and uses the distance detection section to measure the distance to the vehicle located in front. These parameters are automatically integrated into the light distribution control calculation without requiring manual input, allowing the system to adapt to different vehicle types and distances while maintaining ease of operation.
Solution Approach 2:
The control device dynamically adjusts the light distribution pattern by changing multiple parameters simultaneously: the azimuth angle for horizontal direction, the angle of inclination for vertical direction, and the light shielding range based on vehicle height and distance. This parameter-based control approach enables flexible adaptation to various driving scenarios while maintaining a systematic control architecture.
3Measurement precision
If parallax correction is performed to calculate the direction after parallax correction, then the positioning accuracy is improved, but the calculation complexity increases
Solution Approach 1:
The system performs parallax correction calculation in advance to determine the accurate position of the vehicle located in front before calculating the light shielding range. By pre-calculating the position information and storing it, the system reduces the overall computational burden during real-time light distribution control while maintaining high positioning accuracy.
Data Source
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AI summary
A lighting control device configured to control a radiation state of light from a headlamp for a vehicle includes a vehicle model information acquisition section configured to acquire vehicle model information of a vehicle located in front in front of a host vehicle, a distance detection section configured to detect a distance between the vehicle located in front and the host vehicle, and a light distribution controller configured to control a light distribution with respect to a side in front of the host vehicle by the headlamp for a vehicle on the basis of the vehicle model information and the distance.