End Cap for Illuminated Trim Strip Uniform Lighting
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Solution Overview
Problem
Achieving uniform lighting along the length of an illuminated trim strip arrangement for a motor vehicle is challenging due to sensitivity to minor changes in the light guide and surface reflectivity, particularly at the end region where the light guide changes direction and material transitions occur, leading to irregular lighting and aesthetic issues.
Innovation Solution
The end portion of the trim strip arrangement features an external surface matching the adjoining component's appearance and an internal surface with increased reflectivity, ensuring consistent lighting by concealing material changes and using different materials or additives to manage reflectivity, potentially with a reflection coating or multicomponent injection molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the light guide changes direction at the end region to form the closure, then the trim strip arrangement achieves structural completion, but irregular lighting occurs due to the kink and material transition
Solution Approach 1:
The end portion is designed with differentiated surface properties: the external surface matches the appearance of adjoining components while the internal surface has increased reflectivity. This local differentiation allows the end portion to serve both as a structural closure and as a light management element that maintains uniform lighting despite the geometric kink.
Solution Approach 2:
The patent changes the reflectivity parameter of the internal surface of the end portion to be higher than other surfaces. This parameter change compensates for the lighting irregularities caused by the directional change of the light guide, ensuring uniform light distribution along the entire trim strip arrangement.
2Illumination intensity
If the end portion uses different material or surface properties to manage reflectivity, then lighting uniformity is improved, but manufacturing complexity increases
Solution Approach 1:
The end portion combines multiple functions into a single component: it provides structural closure, maintains aesthetic continuity through matched external surfaces, and manages light distribution through its high-reflectivity internal surface. This merging eliminates the need for separate components and reduces overall system complexity.
Solution Approach 2:
The end portion may be formed as a multicomponent injection-molded part with different material regions having different reflectivity properties. This composite structure allows simultaneous achievement of aesthetic requirements (matched external surface) and lighting requirements (high internal reflectivity) within a single manufactured component.
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 configuration ensures uniform lighting and a harmonious appearance by minimizing perceivable differences at the end region, maintaining the external appearance and preventing irregular lighting, thus achieving consistent illumination from the vehicle's exterior perspective.
Implementation Method 1
the internal surface is configured at least partially as a reflection surface that has a reflectivity which is different, in particular increased
Data Source
AI summary
A trim strip arrangement is provided. The trim strip arrangement includes a profiled strip which partially covers a sealing profile and an end portion uniform lighting of a light gap without negatively affecting the external appearance of the trim strip arrangement. Provision is made for an external surface of the end portion to be configured as a visible surface which is optically matched to the external appearance of the adjoining sealing profile, and for an internal surface to be configured at least partially as a reflection surface which has a reflectivity which is increased with respect to the visible surface.