Decorative Layer Light Guide for Hidden Vehicle Notifications
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Solution Overview
Problem
Existing decorative and panel parts in vehicle interiors face challenges in achieving uniform design surfaces with clear, high-luminance notifications that are not visible when inactive, while avoiding issues like increased viewing angle dependence and material swelling due to liquid fillers.
Innovation Solution
A shaped part with a decorative layer featuring a recess and a light-conducting base body embedded with illumination/display elements, guiding light through the recess to the front side without scattering, using transparent or translucent materials like PMMA or polycarbonate, and integrating fastening elements into the base body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If holes are formed in the decorative layer to display notifications, then notification visibility is improved, but viewing angle dependence increases and light scattering occurs
Solution Approach 1:
A light-guiding element (light guide) is introduced as an intermediary component between the notification source and the decorative layer. This light guide redirects and distributes light uniformly across multiple holes, mediating the light path to reduce viewing angle dependence and minimize scattering effects while maintaining notification visibility.
Solution Approach 2:
The optical parameters of the system are changed by introducing a light guide with specific refractive index and optical properties. The light guide modifies light distribution parameters, transforming the direct light path into a diffused, angle-independent illumination pattern that maintains visibility while reducing scattering.
2Illumination intensity
If liquid filler material is used to guide light through holes, then light guidance is improved, but decorative material swelling occurs
Solution Approach 1:
A solid light-guiding element serves as an intermediary that replaces the liquid filler material. This light guide performs the light guidance function without requiring contact with or penetration into the decorative material, thereby preventing swelling while maintaining efficient light transmission and notification visibility.
Solution Approach 2:
The liquid filler system is replaced with a solid light guide structure. This substitution eliminates the need for liquid materials that can penetrate and swell porous decorative materials, while the solid light guide maintains or improves light guidance efficiency through its structured optical design.
3Illumination intensity
If a recess is introduced into the decorative layer to accommodate the light guide, then light guidance without scattering is improved, but manufacturing complexity increases
Solution Approach 1:
The recess formation and light guide installation are merged into an integrated manufacturing process. The recess is formed directly during or before the assembly stage, and the light guide is inserted and secured in a single operation, combining multiple steps into one efficient process that reduces overall manufacturing complexity despite the added geometric feature.
4Adaptability or versatility
If multiple separate components are used for illumination and fastening, then functional versatility is improved, but device complexity increases
Solution Approach 1:
Multiple functional components (illumination unit, display element, and fastening elements) are merged into a single integrated base body structure. This consolidation maintains all required functions while reducing the total number of separate parts, simplifying assembly and reducing device complexity without sacrificing functional versatility.
Solution Approach 2:
The base body is designed as a universal component that performs multiple functions simultaneously: it provides structural support, houses the illumination and display elements, and incorporates fastening elements for mounting. This multi-functional design eliminates the need for separate components, reducing complexity while maintaining versatility.
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 ensures clear, high-luminance notifications with excellent edge sharpness and uniform design, preventing material swelling and scattering, while eliminating the need for additional supports and fastening elements.
Implementation Method 1
a base body made of a light-conducting material, wherein the illumination and/or display elements are embedded in the base body... light emanating from the illumination and/or display element(s) is or can be guided in each case via the base body, towards the front side, and through the recess
Data Source
AI summary
A method for producing a shaped part that includes: a decorative layer having a front/visible side and a rear/opposite side. The decorative layer has a recess extending into the decorative layer from the rear side. The shaped part includes an illumination and/or display unit with one or more illumination/display elements for displaying a notification on the front side, where the illumination and/or display unit comprises a base body made of a light-conducting material, the illumination and/or display elements are embedded in the base body, the base body is arranged at least partially in the recess in the decorative layer, the display elements are embedded in the base body, and the base body is arranged in the recess. Thus, light emanating from the illumination and/or display element(s) can be guided via the base body, towards the front side, and through the recess.