Motor Vehicle Lighting Device with Segmented Light Guide Arms
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Solution Overview
Problem
Existing lighting devices for motor vehicles face limitations in light intensity and the inability to accommodate multiple light sources due to space constraints at the light coupling point, which restricts their lighting efficiency and design flexibility.
Innovation Solution
A lighting device featuring a plate-like light guide with a deflection surface subdivided into sections for multiple light sources, allowing for efficient coupling and redirection of light from each source through a light coupling device, enabling complete light integration and emission with high efficiency and design freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single light source is used with a central light coupling point, then the lighting device structure is simple, but the light intensity is limited and multiple light sources cannot be accommodated
Solution Approach 1:
The light guide is divided into multiple light guide arms (first, second, third light guide arms) that extend in different directions from the light coupling device. Each arm can independently guide light from separate light sources, enabling multiple light sources to be accommodated while maintaining structural organization and avoiding excessive complexity
Solution Approach 2:
The light guide arms extend in different spatial directions (e.g., first arm in first direction, second arm in second direction, third arm in third direction) from the light coupling device. This three-dimensional arrangement allows multiple light sources to be positioned around the coupling device without requiring a larger planar area, thus increasing light intensity capability while controlling structural complexity
2Illumination intensity
If multiple light sources are accommodated, then the light intensity increases, but the space requirements at the light coupling point increase
Solution Approach 1:
The light guide is segmented into multiple distinct arms that radiate from a compact light coupling device. This segmentation allows multiple light sources to be coupled at different locations around the coupling device rather than requiring all sources to occupy the same central space, effectively increasing light intensity without proportionally increasing the coupling point area
Solution Approach 2:
Multiple light guide arms extend in different spatial directions from the light coupling device, utilizing three-dimensional space rather than expanding the two-dimensional coupling point area. This allows multiple light sources to be positioned around the coupling device in different directions, achieving higher light intensity while maintaining a compact coupling point footprint
3Productivity
If light is coupled into the light guide, then lighting efficiency is achieved, but the emitted light distribution intensity is limited
Solution Approach 1:
The light guide is divided into multiple arms that can independently guide and emit light. This segmentation allows light from multiple sources to be coupled and guided through separate paths, maintaining high lighting efficiency for each light source while the combined output of multiple arms produces higher overall emitted light distribution intensity
Solution Approach 2:
Multiple light guide arms are merged into a single integrated light guide structure that shares a common light coupling device. This merging allows the efficient light guidance characteristics of each arm to be combined, resulting in both high lighting efficiency (inherited from individual arm design) and high emitted light intensity (achieved through combination of multiple light sources and arms)
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 high lighting efficiency and creative design options by allowing multiple light sources to be coupled and emitted almost completely, while maintaining advantageous optical properties, and allows for independent control and varied light functions.
Implementation Method 1
a plate-like and preferably flat light guide (12) with a first light-guiding surface (22, 24, 78, 80) and a second light-guiding surface (22, 24, 78, 80) opposite this, which delimit the light guide (12) in such a way that light can be guided in the light guide (12) at the light-guiding surfaces with total internal reflection
Implementation Method 2
A light coupling device (34, 734) of the light guide is provided for coupling light, which has at least one light coupling surface (36, 736) and at least one deflection surface (38, 738). The deflection surface (38, 738) is set up to deflect light that can be radiated onto the deflection surface (38, 738) through the light coupling surface (36, 736) to the collecting reflection surface (30, 730)
Implementation Method 3
The collecting reflection surface (30, 730) is designed to deflect the light directed from the deflection surface (38, 738) onto the collecting reflection surface (30, 730) towards the light exit section (26, 726)
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a lighting device (10, 50, 70, 80) with a plate-like light guide (12), a front light exit section (26), a collecting reflection surface (30) which includes a narrow side surface (32) that limits the light guide (12) from the rear, and with a light coupling device (24) comprising at least one light coupling surface (36) and at least one deflecting surface (38) which is configured to deflect light incident through the light coupling surface (36) onto the deflecting surface (38) to the collecting reflection surface (30), wherein the collecting reflection surface (30) is configured such that the light directed from the deflecting surface (38) onto the collecting reflection surface (30) is deflected to the light exit section (26).A plurality of light sources (14) are provided and the deflecting surface (38) is divided into a corresponding plurality of reflection surface sections (40, 40', 40'', 40'''), wherein each reflection surface section (40, 40', 40'', 40''') is assigned to a light source (14) in such a way that a portion of the light from the respective light source (14) is directed via the assigned reflection surface sections (40, 40', 40'', 40''') to the collecting reflection surface (30).