Vehicle Interior Trim Panel for Stray Light Tightness
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Solution Overview
Problem
Existing interior trim parts for motor vehicles face issues with stray light tightness and optical quality, while also requiring cost-effective production methods.
Innovation Solution
A translucent interior trim part design featuring a decorative layer applied to the translucent body, with opaque components covering the edges to prevent scattered light, incorporating a light guide enclosed between the opaque holder and translucent body for compact and homogeneous light emission, and using a multi-component injection molding process for cost-effective and reliable production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If opaque components are added to prevent stray light, then stray light tightness is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into the opaque component: it serves as both a structural holder for the light guide and as a stray light prevention element. The opaque component is integrated directly with the translucent body, eliminating the need for separate stray light blocking structures and reducing overall device complexity while maintaining effective stray light prevention.
Solution Approach 2:
The opaque component performs multiple functions simultaneously: it holds the light guide in position, blocks stray light from escaping through edges, and provides structural support for the overall assembly. This multi-functionality reduces the number of separate components needed, thereby reducing device complexity while improving stray light tightness.
2Object-affected harmful factors
If light guide is completely enclosed, then stray light is reduced, but light emission homogeneity may be affected
Solution Approach 1:
The opaque component is designed to block stray light at specific edge regions while leaving the light emission areas uncovered. The light guide is enclosed only where necessary to prevent stray light escape, while the regions that need to emit light remain accessible. This localized approach maintains light emission homogeneity while effectively reducing stray light.
Solution Approach 2:
The enclosure structure is segmented to provide different levels of coverage: the opaque component encloses the light guide at the edges to prevent stray light, while allowing light emission through designated areas. This segmentation allows simultaneous achievement of stray light reduction and light emission homogeneity by treating different regions differently.
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 solution effectively reduces unwanted scattered light, achieves high optical quality, and ensures consistent light emission properties, while being cost-effective and easy to maintain.
Implementation Method 1
A light guide is provided into which the light from the at least one illuminant can be coupled
Implementation Method 2
The translucent body is covered on one side by a decorative layer that forms a visible side and is at least partially translucent
Data Source
Figure 1
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AI summary
The invention relates to an interior trim panel (1) for a motor vehicle, with a body (10) which is, at least in portions, transparent and which is covered on one side by a decorative coating (11) through which light can shine at least in panels and which forms a visible side (S). At least one opaque component (12) is connected to edge regions and/or to a rear side of the transparent body (10). This is done in such a manner that at least one region (LB), through which light can pass, of the transparent body (10) remains; light beams (L) from at least one light source (15) arranged in the interior trim panel (1) can pass through said region. According to the invention, the decorative layer (11) is brought as far as the opaque component (12), seen in a cross-section of the interior trim panel (1).