Light Guide Bar Illumination Device for Vehicle Interior Trim
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Solution Overview
Problem
Existing illumination devices for motor vehicle interior fitting parts require complex designs and significant installation space to achieve homogeneous linear illumination, making them difficult to install and space-efficient.
Innovation Solution
An illumination device comprising a light guide bar, a light source bar with point light sources, and a cover element, where the light guide bar is formed from transparent material, the light source bar is aligned with the light entry surface, and the cover element shields and protects the light source bar, allowing for compact and easy installation by preassembling the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If complex illumination designs are used to achieve homogeneous linear illumination, then illumination quality is improved, but device complexity and installation space increase
Solution Approach 1:
The patent combines the light guide bar, light source bar, and cover element into a single integrated illumination device assembly. The light guide bar and light source bar are pre-assembled together, and the cover element is integrated to shield and protect the components, reducing the number of separate parts and simplifying installation while maintaining homogeneous linear illumination quality.
Solution Approach 2:
The illumination device is segmented into functional modules: a light guide bar with specific optical properties, a light source bar with arranged point light sources, and a cover element. This modular segmentation allows for optimized design of each component while facilitating easy assembly and installation as a complete unit.
2Illumination intensity
If complex illumination designs are used to achieve homogeneous linear illumination, then illumination quality is improved, but installation space requirements increase
Solution Approach 1:
The light source bar is positioned within or adjacent to the light guide bar structure, and the cover element envelops these components. This nested arrangement allows the illumination device to achieve homogeneous linear illumination while occupying minimal installation space in the vehicle interior.
3Illumination intensity
If traditional illumination devices are used, then homogeneous linear illumination can be achieved, but installation complexity increases
Solution Approach 1:
The light guide bar and light source bar are pre-assembled into an integrated unit during manufacturing, reducing on-site installation steps. The cover element is designed to be mounted as part of the same assembly process, significantly simplifying installation compared to traditional separate-component approaches while maintaining homogeneous linear illumination quality.
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 simplifies the installation process, reduces installation space, and ensures a homogeneous light image with a fade-out effect by using a tapered and curved light guide bar with a light-scattering section, providing a space-saving and easy-to-install illumination device.
Implementation Method 1
The light guide includes a redirecting surface from which incident light is reflected toward the escape surface by total reflection
Implementation Method 2
a tapered and curved light guide bar with a light-scattering section
Data Source
AI summary
An illumination device for an interior fitting part of a motor vehicle includes a light guide bar that has a light entry surface along a longitudinal extension direction and a light source bar disposed on the light guide bar. The light source bar includes a plurality of point light sources that are disposed in series along the light entry surface, and a cover element that extends along the longitudinal extension direction of the light guide bar and shields at least one side surface of the light guide bar that differs from the light entry surface. The cover element is connected to the light guide bar via a first attachment element, the light source bar is connected to the light guide bar via a second attachment element, and the light source bar is at least partially housed between cover element and light guide bar.