Adaptive Low-Beam Control for Turn-Induced Oncoming Glare
Solution Overview
Problem
Existing vehicle lamps emit light in a way that can cause glare to the occupants of oncoming vehicles when the vehicle is turning, despite efforts to prevent glare while traveling straight.
Innovation Solution
A vehicle lamp system that includes an optical unit and a lamp control unit to adjust the emission direction of the low beam light distribution pattern downward when an oncoming vehicle is detected during a turn, reducing the cutoff line to minimize glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the vehicle lamp emits light in a wide range of the vehicle own lane, then it is easier to detect pedestrians and other obstacles, but the light may be directed to the opposing lane causing glare to oncoming vehicle occupants
Solution Approach 1:
The patent applies dynamics by making the emission direction of the low beam light distribution pattern adjustable rather than fixed. The lamp control unit dynamically changes the emission direction based on vehicle turning status and oncoming vehicle detection, lowering the emission direction when turning with oncoming vehicles present to prevent glare while maintaining wide area illumination when appropriate
Solution Approach 2:
The patent changes the emission direction parameter of the low beam light distribution pattern based on driving conditions. When the vehicle is turning and an oncoming vehicle is detected, the lamp control unit lowers the emission direction parameter to redirect light away from the opposing lane, thereby reducing glare while maintaining effective illumination of the vehicle own lane
2Object-affected harmful factors
If the cutoff line of light emitted to the opposing lane is lowered, then glare to oncoming vehicles is reduced, but light emission coverage to the vehicle own lane may be compromised
Solution Approach 1:
The system dynamically adjusts the cutoff line position based on real-time driving conditions. When turning with oncoming vehicles detected, the cutoff line is uniformly lowered to reduce glare. When not turning or no oncoming vehicles present, the cutoff line returns to its original position to maximize light emission coverage to the vehicle own lane
Solution Approach 2:
The lamp control unit changes the cutoff line parameter of the low beam light distribution pattern based on vehicle turning status and oncoming vehicle presence. The cutoff line is uniformly lowered only when necessary (turning with oncoming vehicles), otherwise maintained at optimal positions to ensure adequate illumination coverage
Data Source
AI summary
A vehicle lamp includes an optical unit including a light source that emits at least a low beam light distribution pattern and a lamp control unit that controls the optical unit. When the vehicle is turning and an oncoming vehicle is present in front of a vehicle mounted with the vehicle lamp, the lamp control unit controls the optical unit to lower an emission direction of the low beam light distribution pattern.