Vehicle Headlamp Irradiation System Shading Oncoming Drivers
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Solution Overview
Problem
Existing headlamp systems for vehicles struggle to effectively prevent dazzle of oncoming vehicle drivers or pedestrians when only one headlamp is functioning, as they cannot accurately determine the side of the detected light, leading to inadequate shading and increased risk of glare.
Innovation Solution
An irradiation system that includes a light position detection unit, a driver position calculation unit, and a shaded area generation unit, which generates a quadrilateral or triangular shaded area based on the detected light position and driver face position to ensure proper shading, even when only one headlamp is detected, using an imaging device and LED matrix lamps to control headlamp illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rectangular shaded area is generated when only one headlamp is detected, then the system can maintain simple operation, but it cannot reliably prevent dazzle of the oncoming vehicle driver
Solution Approach 1:
The patent applies asymmetry by generating a triangular shaded area instead of a rectangular one when only one headlamp is detected. The triangle is formed by connecting the detected headlamp position, a calculated driver face position, and a position shifted by the headlamp spacing distance. This asymmetric triangular configuration enables reliable driver shading while maintaining operational simplicity.
Solution Approach 2:
The system performs preliminary calculation of the driver face position based on the detected headlamp position before generating the shaded area. By pre-calculating where the driver's face would be located relative to the headlamp, the system can proactively create an appropriate shaded area that prevents dazzle before the illumination is actually applied.
2Illumination intensity
If high beam is used to provide excellent visibility for the driver, then the driver's visibility is improved, but it causes dazzle to oncoming vehicle drivers or pedestrians
Solution Approach 1:
The patent applies local quality by creating a localized shaded area (triangular region) that selectively blocks high beam illumination only in the direction of the oncoming vehicle driver's face. This allows the high beam to maintain excellent visibility for the host vehicle driver while locally reducing illumination intensity only where it would cause dazzle to the oncoming driver.
Solution Approach 2:
The triangular shaded area acts as an intermediary element between the high beam illumination and the oncoming driver. It selectively intercepts and blocks the harmful high beam light directed toward the driver's face, while allowing the rest of the high beam illumination to continue providing excellent visibility for the host driver.
3Object-affected harmful factors
If manual switching between low beam and high beam is implemented, then dazzle can be controlled, but it requires driver attention and manual operation
Solution Approach 1:
The system applies self-service by automatically detecting the position of oncoming vehicle headlamps, calculating the driver face position, and generating the appropriate triangular shaded area without requiring any manual input from the driver. The system autonomously adjusts the illumination pattern to prevent dazzle, freeing the driver from manual beam switching operations.
Solution Approach 2:
The system uses feedback from the imaging device that detects oncoming vehicle headlamp positions to automatically adjust the illumination pattern. The detected headlamp position information feeds back to the control system, which then generates the appropriate shaded area to prevent dazzle, creating a closed-loop automatic control system that replaces manual beam switching.
Data Source
AI summary
An irradiation system includes: a light position detection unit that detects a light position of an oncoming vehicle from a captured image; a driver position calculation unit that calculates a position upward and shifted in a first direction by a first distance from the light position detected by the light position detection unit, as a driver position; a shaded area generation unit that generates a first area having vertices respectively set at the light position, the driver position and a position shifted in a second direction, opposite to the first direction, by a distance between a pair of lights in the predetermined vehicle from the driver position, as a shaded area; and an irradiation unit that irradiates an area ahead of the host vehicle while shading the shaded area generated by the shaded area generation unit.