Vehicle Headlight Light Coupling Protection Cover Elements
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Solution Overview
Problem
Modern vehicle headlights face issues with undesired light coupling between closely spaced light modules, which can impair light functions and compromise traffic safety by activating or impairing individual light functions unnecessarily.
Innovation Solution
The implementation of a light coupling protection system using cover elements made of opaque material surrounding the light decoupling surfaces of the central light guide unit, preventing light from coupling into or out of adjacent light guide units, allowing for independent operation of light functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If light modules are arranged in the immediate vicinity of one another to achieve compact headlight design, then the headlight can fulfill multiple light functions with reduced space, but light from one light module couples into adjacent light modules causing undesired activation or impairment of light functions
Solution Approach 1:
The headlight is divided into separate light modules (central light guide unit and outer light guide units) with distinct functions. Each module is spatially segmented and optically isolated from others, allowing independent operation while maintaining compact overall structure. The cover elements further segment the optical paths between adjacent modules.
Solution Approach 2:
Cover elements made of opaque material are introduced as intermediary components between adjacent light guide units. These cover elements block undesired light coupling while allowing the light modules to remain in close proximity, thus enabling compact design without compromising light function independence.
2Device complexity
If multiple light functions are integrated in a compact arrangement, then the headlight structure becomes more efficient and cost-effective, but the visibility and independent operation of individual light functions is impaired due to light coupling
Solution Approach 1:
The headlight integrates multiple light functions (daytime running lights, indicators, main beams) into separate light guide units that are spatially segmented and arranged in a compact configuration. Each unit maintains its functional independence through optical separation, allowing complex lighting functions to operate simultaneously without interference.
Solution Approach 2:
Opaque cover elements are positioned between adjacent light guide units to prevent light from one module from coupling into another. This intermediary structure enables compact integration of multiple light functions while maintaining clear visibility and independent operation of each light function.
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 solution enables independent operation of light functions without undesirable coupling, allowing for complex and efficient lighting setups, enhancing visibility and safety by preventing light interference between closely spaced modules.
Implementation Method 1
The cover elements consist of an opaque material and surround the at least one light decoupling surface of the central light guide unit
Data Source
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AI summary
Light coupling protection for a vehicle headlight, wherein the vehicle headlight has a central light guide unit (L1) and at least two outer light guide units (L2, L3), wherein each light guide unit (L1, L2, L3) has at least one light extraction surface (F1, F2, F3), wherein the central light guide unit (L1) has at least one first and one second cover element (AE1, AE2), wherein the cover elements (AE1, AE2) surround the at least one light extraction surface (F1) of the central light guide unit (L1).