Vehicular Headlamp Road Surface Drawing Using Complementary Colors
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Solution Overview
Problem
Current vehicular headlamp systems do not effectively enhance the visibility of drawing patterns on the road surface, despite the ability to change colors, as there is no specific color strategy to improve visibility.
Innovation Solution
A vehicular headlamp system that uses a pair of right and left headlamp units with a road surface drawing unit to emit first and second light distribution patterns in complementary colors, allowing the patterns to either partially overlap or be alternately formed, with the first light forming the contour and the second light forming the inner part of the drawing pattern, thereby improving visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single color light distribution pattern is used to draw on the road surface, then the drawing pattern can be formed, but the visibility of the drawing pattern is insufficient
Solution Approach 1:
The patent applies color changes by using multiple light sources emitting different wavelengths (colors) to form light distribution patterns. Specifically, first and second light sources emit lights of different colors that form complementary color relationships, and their corresponding light distribution patterns are used to draw the drawing pattern. This color variation enhances the visibility and prominence of the drawing pattern on the road surface without requiring complex additional hardware beyond standard multi-color LED or laser light sources.
2Illumination intensity
If multiple light distribution patterns in complementary colors are used, then the visibility of the drawing pattern is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by making each light source serve multiple functions. The first and second light sources not only emit light for forming their respective light distribution patterns but also work together to create the complementary color effect. The control unit coordinates these light sources to alternately or simultaneously form patterns, allowing a relatively simple light source configuration to achieve enhanced visibility through clever functional coordination rather than requiring numerous independent components.
Solution Approach 2:
The patent applies periodic action by having the first and second light sources alternately emit light to form their respective light distribution patterns over time. The control unit controls the light sources to alternately form the drawing pattern, creating a temporal sequence that enhances visibility. This periodic alternation allows the system to achieve complex visual effects using simple sequential activation of existing light sources, avoiding the need for continuously operating complex multi-source systems.
3Illumination intensity
If the first and second light distribution patterns are made adjacent or partially overlapping, then the visibility and prominence of the drawing pattern are enhanced, but the positioning precision requirements increase
Solution Approach 1:
The patent applies parameter changes by utilizing the complementary color relationship between the first and second lights as a key parameter. This color parameter difference creates natural visual distinction and enhancement at the boundaries where the light distribution patterns meet or overlap. The complementary color contrast serves as a built-in positioning aid that reduces the stringency of physical positioning requirements, as the color difference itself highlights the pattern boundaries and enhances visibility even with moderate positioning accuracy.
Data Source
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AI summary
A vehicular headlamp system (S) includes: a pair of right and left headlamp units (12R; 12L); and a road surface drawing unit (20) provided in the headlamp units (12R; 12L), the road surface drawing unit (20) being configured to emit first light (BR) so as to form a first light distribution pattern (40A) and to emit second light (BL) so as to form a second light distribution pattern (40B), such that a predetermined drawing pattern (40) is drawn on a road surface, the drawing pattern (40) being configured such that the first light distribution pattern (40A) and the second light distribution pattern (40B) are adjacent to each other or the first light distribution pattern (40A) and the second light distribution pattern (40B) at least partially overlap each other, and the first light (BR) and the second light (BL) being set in a relationship of complementary colors.