Vehicle Light Guide Conical End Region Lateral Emission Control
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Solution Overview
Problem
Existing light guides for vehicle lighting devices suffer from unwanted light reflections and emissions from the end region, leading to disturbing light beams and impaired appearance due to hot spots.
Innovation Solution
The light guide features a conical or frustoconical end region with a base facing the light guide, which effectively redirects and absorbs or scatters light to minimize lateral emissions, thereby reducing disturbing light rays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a flat surface is used at the end region of the light guide, then the light guide structure is simple, but unwanted light reflections occur and light beams emerge laterally in disturbing directions
Solution Approach 1:
The end region of the light guide is designed with a curved surface instead of a flat surface. This curvature causes incident light rays to be reflected in different directions, preventing the formation of concentrated lateral light beams and reducing disturbing reflections while maintaining structural simplicity.
2Ease of manufacture
If a flat surface is used at the end region of the light guide, then manufacturing is easy, but hot spots are created and appearance is impaired
Solution Approach 1:
The curved surface at the end region disperses light reflections, preventing concentration of light intensity in specific areas. This eliminates hot spots and creates a more uniform appearance while remaining compatible with standard manufacturing processes.
3Object-generated harmful factors
If the end region has a curved surface, then unwanted light emissions are reduced, but manufacturing complexity increases
Solution Approach 1:
The curved surface can be implemented using conventional manufacturing techniques such as injection molding or CNC machining, making the increased complexity manageable. The curvature effectively reduces lateral light emissions by scattering reflections while remaining producible with standard equipment.
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 significantly reduces unwanted light emissions from the end region, enhancing the appearance of the lighting device by minimizing hot spots and ensuring a more uniform light distribution.
Implementation Method 1
The light guide features a conical or frustoconical end region with a base facing the light guide, which effectively redirects and absorbs or scatters light to minimize lateral emissions
Implementation Method 2
The light guide features a conical or frustoconical end region with a base facing the light guide, which effectively redirects and absorbs or scatters light to minimize lateral emissions
Implementation Method 3
The light guide features a conical or frustoconical end region with a base facing the light guide, which effectively redirects and absorbs or scatters light to minimize lateral emissions
Data Source
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AI summary
Light guide (10) for a lighting device of a vehicle, comprising an entrance surface into which light (11) can enter, at least one lateral exit surface (12) from which a portion of the light (11) that has entered can exit, an end region (13) through which a portion of the light (11) that has entered can exit, wherein the end region (13) is structured and/or shaped in such a way that the portion of light (11) which laterally emerges from the region adjacent to the end region (13) after reflection at or in the end region (13) is reduced or minimised.