Vehicle Headlamp Beam Control for Reverse Visibility and Glare Prevention
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Solution Overview
Problem
Existing vehicle headlamp systems fail to adequately enhance visibility and safety during backward movement, as they either simply adjust light distribution in the anti-steering direction or rely on dimming without actively improving driver visibility at night.
Innovation Solution
A vehicle headlamp device with a light distribution direction changer and a traveling state changer, controlled by an arithmetic controller, adjusts the light distribution outward in the vehicle width direction during backward movement, and includes mechanisms to prevent glare and ensure proper illumination of lateral and rear areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light distribution direction is changed only in the anti-steering direction during backward movement, then the headlamp structure remains simple, but the visibility of lateral sides and rear areas is insufficient
Solution Approach 1:
The patent implements dynamic light distribution control that adapts the headlamp beam direction based on the vehicle's traveling state. During backward movement, the system dynamically adjusts the light distribution direction to be more outward compared to forward movement, creating a dynamic illumination pattern that follows the vehicle's operational context and improves visibility of lateral and rear areas.
Solution Approach 2:
The system changes the light distribution parameters (specifically the swivel angle and outward direction) based on the detected traveling state. When backward movement is detected via the traveling state changer, the arithmetic controller modifies the light distribution parameters to direct illumination more outward, thereby enhancing visibility without requiring additional hardware components.
2Illumination intensity
If the headlamp illuminates more outward areas during backward movement, then the driver visibility is improved, but the risk of glare to other road users increases
Solution Approach 1:
The system incorporates feedback through the arithmetic controller that continuously monitors the vehicle's traveling state and adjusts the light distribution accordingly. By detecting backward movement and responding with appropriate light direction changes, the system provides feedback-based control that balances visibility improvement with glare prevention, ensuring illumination is directed appropriately for the current operational context.
Solution Approach 2:
The patent applies preliminary anti-action by proactively adjusting the light distribution direction before glare issues arise. When backward movement is detected, the system preemptively modifies the illumination pattern to be more outward, which improves driver visibility while simultaneously preventing potential glare to other road users by avoiding direct forward illumination in reverse conditions.
3Area of stationary object
If the light distribution direction is adjusted more outward during backward movement, then the illumination coverage of lateral areas is enhanced, but the energy consumption increases
Solution Approach 1:
The system employs dynamic control of light distribution based on the vehicle's traveling state. During backward movement, the headlamp direction is dynamically adjusted to illuminate lateral areas more effectively. This dynamic adaptation ensures that energy is concentrated in the areas that require illumination during reverse operations, rather than uniformly illuminating all directions, thereby managing energy consumption efficiently.
Solution Approach 2:
The arithmetic controller modifies the light distribution parameters only when backward movement is detected, changing the swivel angle and outward direction to optimize illumination coverage. This parameter change approach ensures that energy is directed precisely where needed during reverse operations, avoiding unnecessary energy consumption in directions that do not require illumination during backward movement.
Data Source
AI summary
A vehicle headlamp device includes a headlamp unit, a light distribution direction changer, a traveling state changer, and an arithmetic controller. The headlamp unit is configured to illuminate an area ahead of a vehicle. The light distribution direction changer is configured to change a light distribution direction of the headlamp unit. The traveling state changer is configured to change a traveling state of the vehicle. The arithmetic controller is configured to, upon detecting a backward movement of the vehicle due to an operation received by the traveling state changer, cause the light distribution direction changer to change the light distribution direction of the headlamp unit more outward in a vehicle width direction of the vehicle than in a normal traveling state.