Tail Light Light Guide Curved Reflection Surface
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Solution Overview
Problem
Conventional tail lights require two separate units to achieve adequate back-up lighting and ground illumination, which is inefficient and not optimized for legal requirements.
Innovation Solution
A tail light with a curved or corrugated first reflection surface within the light guide body, allowing for optimized light distribution through multiple exit areas and facets, enabling a single unit to meet both back-up lighting and ground illumination needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat reflection surface is used in the light guide body, then the structure is simple and easy to manufacture, but the light distribution is insufficient and cannot meet legal requirements for back-up lighting
Solution Approach 1:
The patent applies curvature to the reflection surface by providing a curved first reflection surface in the light guide body instead of a flat surface. This curved surface optimizes the distribution of light from the LED source, ensuring that sufficient light reaches both the first light exit area (for back-up lighting) and the second light exit area (for ground illumination), thereby meeting legal requirements while maintaining a relatively simple overall structure.
2Illumination intensity
If two separate tail lights are arranged side by side, then adequate back-up lighting and ground illumination can be achieved, but the device complexity and space requirements increase
Solution Approach 1:
The patent merges the functions of two separate tail lights into a single integrated unit. The light guide body is designed with a single LED source that simultaneously provides back-up lighting through the first light exit area and ground illumination through the second light exit area. This consolidation reduces device complexity, saves space, and simplifies the overall lighting system while meeting all legal requirements.
Solution Approach 2:
The single tail light unit is designed to perform multiple functions: it provides back-up lighting through the first light exit area and simultaneously illuminates the ground through the second light exit area. The light guide body acts as a multi-functional component that distributes light from a single LED source to serve different lighting purposes, eliminating the need for separate dedicated lighting units.
3Illumination intensity
If a curved or corrugated reflection surface is used, then the light distribution is optimized for legal requirements, but the manufacturing complexity increases
Solution Approach 1:
The patent implements a curved first reflection surface within the light guide body to optimize light distribution. The curvature is designed to reflect and distribute light from the LED source effectively to both the first and second light exit areas, ensuring compliance with legal requirements for back-up lighting intensity and ground illumination. This curved geometry can be manufactured using standard molding techniques, balancing optical performance with manufacturability.
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
The curved or corrugated reflection surface ensures efficient light distribution for both back-up lighting and ground illumination, meeting legal requirements with a single tail light unit, improving light quality and reducing the need for multiple units.
Implementation Method 1
a light guide body, into which light generated by the light source can be coupled in and out of which back-up light can be coupled out
Implementation Method 2
the light guide body has a first reflection surface on which a part of the coupled-in light can be deflected to at least one of the light exit areas
Data Source
AI summary
A tail light with at least one light source and with a light guide body into which light generated by the light source can be coupled and out of which back-up light can be coupled, and light for illuminating the ground region can be decoupled. The light guide body has a light entry area through which light from the light source can be coupled into the light guide body. The light guide body has at least a first light exit area for the back-up light and a second light exit area for the light for illuminating the ground region, wherein the first and the second light exit areas may overlap. The light guide body has a first reflection surface at which a portion of the coupled-in light can be deflected in the direction of at least one of the light exit areas.