Turning Headlight Pattern Irradiation for Pedestrian Recognition
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Solution Overview
Problem
Existing vehicle headlight systems do not adequately prevent pedestrian overlooking, especially under adverse conditions like nighttime and rain, as they do not effectively enhance visibility during vehicle turns.
Innovation Solution
A vehicle headlight device with left- and right-side pattern irradiation lamps that alternately irradiate bright and dark regions, illuminating the direction of intended turns to improve pedestrian visibility by utilizing the visual properties of humans, where the patterned light enhances recognition of pedestrians in the peripheral field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional headlight systems are used, then the structure is simple, but pedestrian visibility under adverse conditions is insufficient
Solution Approach 1:
The headlight system is divided into multiple independent photoirradiators (first, second, third, fourth) arranged in specific patterns. Each photoirradiator can be controlled independently to create segmented illumination zones, allowing the system to provide enhanced visibility while maintaining a modular structure that balances complexity and functionality.
Solution Approach 2:
Different regions of the road are illuminated with different light patterns and intensities. The photoirradiators create specific illumination zones with bright and dark regions alternately repeated, providing localized enhancement of pedestrian visibility in critical areas while maintaining overall system efficiency.
2Reliability
If uniform light irradiation is used, then the structure is simple, but pedestrian recognition in peripheral field of view is difficult
Solution Approach 1:
The system creates periodic patterns of bright and dark regions through the arrangement and control of multiple photoirradiators. This periodic illumination pattern enhances the visual contrast that helps drivers recognize pedestrians in their peripheral field of view, making the system more effective without requiring complex dynamic control mechanisms.
3Reliability
If optical axis direction is adjusted based on steering angle and vehicle speed, then visibility in travel direction is improved, but pedestrian visibility at intersections during turns is insufficient
Solution Approach 1:
The photoirradiators are positioned and configured to pre-illuminate areas where pedestrians are likely to be present during turns, such as intersections and roadside areas. This preliminary illumination of critical zones ensures that when a turn is executed, the enhanced visibility is already in place, improving safety without requiring real-time complex control adjustments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly improves pedestrian visibility for drivers during turns under adverse conditions by making it easier to recognize pedestrians, reducing the likelihood of overlooking, and ensuring reliable detection of pedestrians in the direction of vehicle change.
Implementation Method 1
a left-side photoirradiator which irradiates light on a left-side light distribution region on a left side of a travel roadway of a vehicle in an irradiation pattern in which a bright region and a dark region are alternately repeated
Data Source
AI summary
A vehicle headlight device capable of improving overlooking of pedestrians by a driver. The device includes: a left-side photoirradiator (left-side pattern irradiation lamp) which irradiates light on a left-side light distribution region (irradiation pattern light distribution region) on a left side of a travel roadway of a vehicle in an irradiation pattern in which a bright region a1 and a dark region are alternately repeated; and a right-side photoirradiator (right-side pattern irradiation lamp) which irradiates light on a right-side light distribution region (irradiation pattern light distribution region) on a right side of a travel roadway of the vehicle in an irradiation pattern in which a bright region a1 and a dark region are alternately repeated. In this embodiment, the left-side photoirradiator (left-side pattern irradiation lamp) is illuminated during left turn of the vehicle, and the right-side photoirradiator (right-side pattern irradiation lamp) is illuminated during right turn of the vehicle.