Perforated Interior Trim With Reflective Light Path for Wider Emission
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Solution Overview
Problem
Existing vehicle interior trim parts with decorative layers suffer from inefficient light emission due to narrow emission angles and light intensity loss, and color fidelity issues caused by interactions between light and the decorative material.
Innovation Solution
A vehicle interior trim part design featuring a decorative layer with through-openings and a reflective layer, where the through-openings in the reflective layer overlap with those in the decorative layer to form a light path, allowing for improved light guidance and color fidelity, with the reflective layer being at least 1.5 times thicker than the decorative layer to enhance luminous efficiency and diffuse reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is arranged behind a decorative layer with openings, then atmospheric illumination can be produced in the vehicle interior, but the light emission angle becomes narrow and light intensity is lost
Solution Approach 1:
The patent introduces a reflective layer positioned behind the decorative layer, creating a multi-layer structure that adds a new dimension to the light path. This reflective layer redirects light that would otherwise be lost, transforming the narrow emission angle into a broader distribution pattern while maintaining high light intensity output into the vehicle interior.
Solution Approach 2:
The reflective layer acts as an intermediary element between the light source and the decorative layer. It mediates the light path by reflecting light that passes through the decorative layer openings, redirecting it to achieve broader emission characteristics without compromising the aesthetic function of the decorative layer.
2Illumination intensity
If a decorative layer is used for vehicle interior trim parts, then aesthetic appearance is achieved, but color fidelity of emitted light deteriorates due to interactions between light and decorative material
Solution Approach 1:
The patent segments the lighting system into distinct functional layers: a decorative layer for aesthetic purposes and a reflective layer for optical control. This segmentation allows the decorative layer to focus on appearance while the reflective layer manages light color fidelity, preventing harmful color shifts caused by light-material interactions in the decorative layer.
Solution Approach 2:
The reflective layer serves as an intermediary that protects the light source's color characteristics. By positioning this layer between the light source and the decorative layer, it mediates the interaction, ensuring that light maintains its original color properties before reaching the decorative material, thus preventing color shifts.
3Illumination intensity
If the reflective layer is made thicker to enhance diffusion and luminous efficiency, then light guidance and color fidelity improve, but device complexity increases
Solution Approach 1:
The patent optimizes the thickness parameter of the reflective layer by establishing a specific ratio relationship with the decorative layer (at least 1.5 times thicker). This parameter change ensures sufficient light diffusion and luminous efficiency while avoiding excessive thickness that would unnecessarily increase device complexity. The defined ratio provides a clear design guideline for manufacturing.
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 design achieves broad emission characteristics, improved light guidance, and color fidelity, preventing excessive light dimming and color shifts, allowing for aesthetically pleasing and efficient backlighting with consistent light distribution.
Implementation Method 1
the reflective layer is configured to reflect light from the reflective layer, in particular from an inner wall of the through-openings in the reflective layer
Implementation Method 2
a light path L allows light emitted by a light source arranged on a rear side of the vehicle interior trim part to exit from the visible side of the vehicle interior trim part
Data Source
AI summary
The present application relates to a vehicle interior trim part. The vehicle interior trim part comprises a decorative layer, which has through-openings. In addition, the vehicle interior trim part comprises a reflective layer, which likewise has through-openings, the inner wall of the through-openings in the reflective layer being reflective. The through-openings in the reflective layer overlap at least in part with the through-openings in the decorative layer, such that a light path is formed at least in part. The reflective layer is at least 1.5 times as thick as the decorative layer in a periphery of the light path.