Reflective Diaphragm for Headlight Light Distribution
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Solution Overview
Problem
Modern vehicle headlight designs face challenges in eliminating visible boundaries between lit and unlit areas on the carriageway due to the deep recess of light sources and output lenses, which also restricts the distribution of light intensity and increases the headlight's outer diameter.
Innovation Solution
A reflective diaphragm with lateral walls is introduced between the light source and output lens, featuring rounded ends and adjustable angles to direct light rays efficiently, reducing the impact of beveled edges and allowing for variable adaptation to the headlight's mechanical design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source and output lens are recessed deep in the headlight bushing, then the light distribution in vertical direction is improved, but the lateral bevelled edges of the bushing create a visible boundary between lit and unlit areas on the carriageway
Solution Approach 1:
A reflective diaphragm is introduced as an intermediary element between the light source and the lateral bevelled edges. This diaphragm with reflective surfaces redirects light rays that would otherwise be trimmed by the bevelled edges, eliminating the visible boundary while preserving the deep recess design for improved vertical light distribution.
2Illumination intensity
If the light source and output lens are recessed deep in the headlight bushing, then the light distribution is improved, but the outer diameter of the headlight increases
Solution Approach 1:
The reflective diaphragm acts as a space-efficient intermediary that redirects light without requiring additional lateral space. This allows the headlight to maintain a compact outer diameter while achieving improved light distribution through the deep recess configuration.
3Illumination intensity
If additional contributive systems are added to increase total light output, then the illumination intensity is improved, but the complexity of the headlight system increases
Solution Approach 1:
The reflective diaphragm is integrated into the existing headlight structure, merging the contributive light function with the basic projection unit. This unified design increases total light output while avoiding the complexity of separate additional systems, as the diaphragm works in conjunction with the existing light source and output lens.
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
This design produces a homogeneous and intensive light pattern on the carriageway without visible boundaries, enhancing illumination while allowing for flexible component adaptation and reduced headlight size.
Implementation Method 1
between the light source and the output lens a reflective diaphragm is arranged that comprises reflective lateral walls for spatial delimitation between the reflective lateral walls of the beam of the light rays generated by the light source before they enter the output lens
Data Source
AI summary
A light device comprises at least one light source (10) to generate light rays (201, 202, 203), an output lens (5), and lateral walls (7, 8) delimiting a space (27) for passage of the light rays after the lens and exiting out of the light device through a transparent cover (9) covering the space at the front. Between the light source and the output lens, a reflective diaphragm (11) is arranged that comprises fixed reflective lateral walls (11a, 11b), for spatial delimitation of the light rays between the lateral walls before they enter the output lens. The output lens has, in the vertical direction at the side facing the diaphragm, a convex shape and the lateral walls include, at the side facing the output lens, free ends (14) that have a rounded concave shape in the vertical direction, which is substantially complementary to the output lens convex shape.