Vehicle Headlamp Reflector Light Distribution Design
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Solution Overview
Problem
Conventional vehicle headlamp systems fail to fully utilize light from semiconductor light emitting elements and are cumbersome in designing light distribution patterns, leading to inefficient light usage and complex designs.
Innovation Solution
The vehicle headlamp system employs reflector reflection and light distribution type lamp units for low and high beams, utilizing reflection surfaces to effectively direct light into predetermined patterns, and incorporates a swivel device to adjust light distribution patterns horizontally, ensuring efficient light usage and simplified design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a projector type first subsidiary lamp unit is used, then light distribution patterns can be formed, but light from the semiconductor light emitting element is reflected on the reflector surface and shaded by the base member, preventing full utilization of the light
Solution Approach 1:
The patent inverts the conventional projector type design by using a reflector type lamp unit where the reflector surface is positioned to receive light directly from the semiconductor light emitting element without intermediate projection lenses. The reflector surface is designed with a specific shape and position to directly form the light distribution pattern, eliminating the shading problem caused by base members blocking reflected light and achieving full utilization of light from the semiconductor element.
2Ease of manufacture
If a lens direct emission and light distribution type second subsidiary lamp unit is used, then light distribution patterns can be formed, but the design becomes cumbersome
Solution Approach 1:
The patent merges the functions of light emission, reflection, and distribution into a single integrated reflector type lamp unit structure. The reflector surface is designed to simultaneously receive light from the semiconductor light emitting element and form the desired light distribution pattern through its specific geometric shape, eliminating the need for separate projection lenses and complex multi-component assemblies, thereby simplifying the overall design and manufacturing process.
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 solution allows for the effective utilization of semiconductor light sources, simplifies light distribution pattern design, and enhances visibility by directing light in a horizontal direction, particularly during curved driving, contributing to safer driving conditions.
Implementation Method 1
The vehicle headlamp according to the present invention uses a lamp units of a reflector reflection and light distribution type as the lamp unit for low beams and the lamp unit for high beam. Thus, in comparison with a lamp unit of a projector type, light from the semiconductor-type light source can be sufficiently effectively utilized.
Data Source
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AI summary
The present invention provides a lamp unit (2) for low beam and a lamp unit (3) for high beam. A respective one of the lamp units (2,3) is made of a semiconductor-type light source (20) and a reflector (23) that has reflection surfaces (21,22) configured to emit light from the semiconductor-type light source (20) forward of a vehicle (C), as a predetermined light distribution pattern. As a result, the present invention is capable of fully utilizing the light from the semiconductor-type light source and facilitating a light distribution design for forming the light in a predetermined light distribution pattern.