Vehicle Headlight Control Apparatus for Glare Reduction
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Solution Overview
Problem
Existing vehicle headlight control systems struggle to balance reducing driver discomfort from reflective objects while maintaining pedestrian visibility, as lowering luminance in certain regions can impair visibility of pedestrians.
Innovation Solution
A control apparatus and method for vehicle headlights that form a first and second irradiation light, where the second light overlaps the lower end of the first light vertically and spans its width, with adjustable dimming of the first light's range based on the position of reflective objects, ensuring reduced glare for drivers and improved visibility for pedestrians.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the irradiation luminous intensity is lowered at the divided region corresponding to the position where the reflective object is present, then the driver's discomfort from the reflective object is reduced, but the visibility of pedestrians in that region is lowered
Solution Approach 1:
The high beam irradiation region is divided into multiple divided regions in the vertical direction, allowing independent luminous intensity control for each region. This segmentation enables selective dimming of specific areas to reduce glare from reflective objects while preserving illumination in other regions where pedestrians may be present.
Solution Approach 2:
Different luminous intensity levels are applied to different divided regions based on the position of reflective objects. The control apparatus identifies the vertical position of reflective objects and adjusts the luminous intensity specifically in the corresponding divided region, while maintaining higher intensity in other regions to ensure pedestrian visibility.
2Illumination intensity
If a high beam is used to improve overall visibility, then the driver's visibility is improved, but the reflective object causes dazzling to the driver
Solution Approach 1:
The high beam is segmented into multiple divided regions with independent intensity control. When a reflective object is detected, the system maintains high beam operation for overall visibility but selectively reduces intensity only in the divided region corresponding to the reflective object's position, eliminating dazzling while preserving overall illumination.
Solution Approach 2:
The luminous intensity in each divided region is dynamically adjusted based on the real-time position of reflective objects detected by the imaging device. The control apparatus continuously monitors and modifies the light distribution pattern, transitioning between different illumination states to balance visibility and glare reduction.
Data Source
AI summary
To achieve both reduction of a sense of discomfort to a driver due to a reflective object and improvement in visibility of a pedestrian or the like. A control apparatus for controlling light irradiated by a headlight of a vehicle, where the control apparatus causes the headlight to forma first irradiation light and a second irradiation light that overlaps a certain range on the lower end side in the vertical direction of the first irradiation light and overlaps the entire range in the width direction of the first irradiation light, and causes to dim at least a part of the entire range of the first irradiation light corresponding to the position of a reflective object when the reflective object fixed on the road ahead of the vehicle is present.