Vehicle Headlamp Light Distribution Pattern Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle headlamp systems cause discomfort for drivers when dimming control moves a subregion from an irradiation state to a non-irradiation state or vice versa, as the transition appears discontinuous, leading to perceived small motions or glare issues.
Innovation Solution
A vehicle headlamp system with multiple light sources and control means that gradually turn on/off light sources with time differences to smoothly transition between irradiation and non-irradiation states in the light distribution pattern, ensuring a continuous and smooth movement of the irradiation region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light sources are turned on/off to move the non-irradiation region or irradiation region in the light distribution pattern, then the region can be moved to correspond to moving vehicles or pedestrians, but the transition appears discontinuous causing driver discomfort
Solution Approach 1:
The control unit turns on light sources in advance before they are needed to form the non-irradiation region, and turns them off after they are no longer needed. This preliminary and delayed action creates an overlap period where multiple light sources are simultaneously active, ensuring continuous illumination coverage while the non-irradiation region transitions smoothly across subregions without visible discontinuities
Solution Approach 2:
By maintaining overlapping activation of light sources during transitions, the system ensures continuous useful action in illuminating the road. The irradiation region moves continuously from one subregion to another without interruption, preventing the driver from perceiving discontinuous jumps or gaps in the light distribution pattern
2Object-affected harmful factors
If light sources are turned on/off to adjust irradiation regions, then glare can be suppressed for vehicles and pedestrians, but the discrete switching creates perceived small motions or discontinuous movement
Solution Approach 1:
Light sources are activated in advance before the non-irradiation region reaches their corresponding subregions, and remain active after the region has moved past them. This timing strategy ensures that as one light source turns off, another has already turned on, creating a smooth transitional overlap that eliminates perceived discontinuities while maintaining effective glare suppression
Solution Approach 2:
The system dynamically adjusts the activation timing of light sources based on the movement and position of vehicles or pedestrians. By making the light source activation dynamic and adaptive rather than static and simultaneous, the system achieves smooth visual transitions while maintaining the ability to suppress glare in real-time as objects move through the illumination pattern
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A light distribution pattern (PA) formed by irradiation of light from a plurality of light sources (52R1 to 52R5, 52L1 to 52L5) for a headlamp (22L, 22R) provided in a vehicle (10) includes a plurality of regions (PA1 to PA5) each of which are irradiated by two or more corresponding light sources of the plurality of light sources (52R1 to 52R5, 52L1 to 52L5). An irradiation region (PA) is controlled so that at least one of the plurality of regions (PA1 to PA5) corresponds to an object moving the light distribution pattern (PA). The two or more light sources corresponding to the irradiation region are turned on with a time difference.