Vehicle Headlight Light Guide Arrangement for Uniform Signaling
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Solution Overview
Problem
Existing light guide arrangements for motor vehicle headlights face challenges in creating a continuous and uniform optical impression for signaling functions, particularly in implementing a wiping blinker functionality with the same light exit surface and emission direction, while maintaining the legal requirements for light distribution.
Innovation Solution
The light guide arrangement features secondary light sources with main emission directions aligned approximately with the longitudinal central axis of the light guide element, with adjacent light guide bodies either in direct contact or at a small distance, allowing light to be deflected and shared between adjacent bodies to create a continuous secondary light distribution, and is designed to maintain this arrangement by being attachable to a common heat sink or carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light guide bodies are arranged behind the light guide element to create a sweeping turn signal function, then the signaling functionality is improved, but the continuity of the optical impression deteriorates due to gaps between adjacent light guide bodies
Solution Approach 1:
Light guide bodies are nested in sequence behind the light guide element, with each light guide body positioned to receive light from the previous one. This nesting arrangement allows multiple light guide bodies to be integrated in a compact configuration while maintaining the sweeping turn signal function and achieving visual continuity of the light distribution.
2Stability of the object's composition
If secondary light sources are positioned to emit light in directions aligned with the light guide element axis, then the uniformity of light distribution is improved, but the complexity of positioning and alignment increases
Solution Approach 1:
Each secondary light source is positioned at a specific location behind the light guide element with its emission direction aligned to correspond to the longitudinal central axis of the light guide element. This localized positioning and directional alignment ensures uniform light distribution across the light guide element while maintaining a relatively simple overall structure.
3Stability of the object's composition
If light guide bodies are placed in direct contact or at small distances from each other, then the continuity of light distribution is improved, but the difficulty of assembly and heat management increases
Solution Approach 1:
The light guide system is segmented into multiple discrete light guide bodies that can be individually manufactured and then assembled. These segmented light guide bodies are positioned in direct contact or at small distances from each other to achieve continuous light distribution, while the modular segmentation facilitates assembly and heat management.
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
This configuration ensures a uniform and continuous light distribution, achieving the desired optical impression and meeting legal requirements for light direction indication while allowing for efficient heat management and reduced adverse effects on secondary light distributions.
Implementation Method 1
an elongated light guide element (1) and at least one primary light source (10), wherein light from the primary light source (10) can be coupled into the light guide element (1) via at least one coupling area (2) at one end of the light guide element (1), The light guiding element (1) has a light-emitting surface (3) on its front side and a light-deflection surface (4) on its opposite rear side, so that it Light coupled into the light guide element (1) from at least one primary light source (10) is deflected at the light deflection surface (4) and emitted from the light guide element (1) via the light output coupling surface (3)
Implementation Method 2
Two or more light guide bodies (11-14) are provided along the back side of the light guide element (1), each light guide body (11-14) being assigned at least one secondary light source (21-24), with which secondary light source (21-24) light can be coupled into the assigned light guide body (11-14) via a light guide body coupling area (11a-14a) and preferably directed in parallel
Implementation Method 3
coupled light is deflected at a light guide body deflection surface (11b-14b) to a light guide body output coupling surface (11c-14c) and exits the light guide body (11-14) from this surface, so that a secondary light distribution can be generated with each light guide body (11-14)
Data Source
Figure 1
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AI summary
The invention relates to a light guide arrangement (100) for generating at least one lighting function and/or signaling function of a motor vehicle headlight or at least one lighting function and/or signaling function of a lighting device for a motor vehicle headlight, wherein the light guide arrangement (100) comprises an elongated light guide element (1) and at least one primary light source (10), wherein light from the primary light source (10) can be coupled into the light guide element (1) via at least one coupling area (2) at one end of the light guide element (1). The main emission directions of secondary light sources (21, 22, 23, 24), which couple light into light guide elements (11, 12, 13, 14), run in a region adjacent to the light guide element (1) to the respective secondary light source (21, 22, 23, 24) approximately in the direction of a longitudinal central axis (X1) of the light guide element (1), and the light guide elements (11, 12, 13,14) are designed and arranged such that adjacent optical fibers (11, 12, 13, 14) are directly adjacent to each other or arranged at a small distance from each other, at least in the area of the optical fiber output coupling surfaces (11c, 12c, 13c, 14c), wherein light which is deflected from the optical fiber deflection surface (11b, 12b, 13b) in the optical fiber input coupling area (11a, 12a, 13a) of an optical fiber (11, 12, 13) exits at least partially via an optical fiber input coupling area surface (11a') limiting the optical fiber input coupling area (11a), enters the adjacent optical fiber (12), passes through it and is emitted through the optical fiber element (1).