Vehicle Interior Light Guide Layout for Continuous Panel Illumination
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Solution Overview
Problem
Existing vehicle interior lighting devices struggle to provide continuous illumination across a wider range due to limited light emission from single sources and non-continuous light distribution from multiple sources.
Innovation Solution
A lighting device comprising a first light source portion, an elongated light guide, and a second light source portion, where the second light source is provided independently and adjacent to the light guide, with both lights being diffused through outer lenses to overlap and create continuous illumination on interior vehicle panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single lighting member with light-guiding properties is used, then the structure is simple, but the range of light emission is limited and cannot illuminate a wider range continuously
Solution Approach 1:
The lighting device is divided into multiple independent light source portions (first light source portion and second light source portion), each capable of emitting light independently. This segmentation allows each portion to cover a specific illumination range, and when combined, they achieve a wider overall illumination range while maintaining structural simplicity through modular design.
Solution Approach 2:
Multiple light source portions are merged into a single lighting device system, with their light emission ranges overlapping to create continuous illumination. The first light source portion and second light source portion work together, combining their individual illumination capabilities to achieve a wider effective lighting area than any single source could provide alone.
2Area of stationary object
If multiple light sources are used to expand illumination range, then the light emission range increases, but the light distribution appears non-continuous
Solution Approach 1:
The light emission ranges of the first light source portion and second light source portion are designed to partially overlap, with each source emitting light beyond what is strictly necessary for its primary coverage area. This excessive action ensures that the transition between light sources is seamless, creating continuous illumination without visible boundaries or gaps between the light zones.
3Area of stationary object
If light is emitted from separate light sources to cover wider area, then the illumination range expands, but the uniformity and continuity of light distribution deteriorates
Solution Approach 1:
Different regions of the illuminated area receive light from different sources, with the overlapping region receiving light from both sources. This local quality variation is designed intentionally, where the overlap zone provides enhanced illumination that bridges the transition between sources, ensuring uniform overall light distribution across the entire illuminated area despite the use of multiple separate sources.
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 enables continuous illumination on vehicle interior panels by overlapping the light from the first and second light sources, improving the uniformity and continuity of light distribution across the illuminated area.
Implementation Method 1
a light guide that comprises a light guide body with an elongated shape, guides light incident from the first light source portion in a longitudinal direction of the elongated shape, and emits a first light comprising the guided light
Implementation Method 2
each of the first light emitted from the first light source portion and the second light emitted from the second light portion is shone on the illuminated object through an outer lens having a light diffusion effect
Data Source
AI summary
A lighting device includes a first light source portion, a light guide that includes a light guide body with an elongated shape, guides light incident from the first light source portion in a longitudinal direction of the elongated shape, and emits a first light including the guided light to illuminate an illuminated object, and a second light source portion that emits a second light to illuminate the illuminated object. The second light source portion is provided independently of the first light source portion and the light guide.