Vehicle Headlamp Lighting Module with Masked Light-Exit Face
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Solution Overview
Problem
Existing vehicle headlamp lighting modules that use laser-excitable lighting elements emit undirected light, requiring additional components to position and shape the light for downstream optical systems.
Innovation Solution
The lighting element is integrated into the light-entry face of a carrier element with a light-opaque mask or inclined side faces to create a directed light-exit face, allowing for controlled light emission and adaptation to the curvature of the projection lens for improved imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If additional components are used to position and shape light from laser-excitable lighting elements, then light directionality and shape control are improved, but device complexity increases
Solution Approach 1:
The patent combines the lighting element directly with the carrier element in an integrated module, eliminating the need for separate positioning and shaping components. The carrier element itself is designed with light-guiding properties to direct the light emitted by the integrated lighting element, thus merging multiple functions into a single unified structure.
2Manufacturing precision
If a light-opaque mask surrounds the light-exit face, then light shaping precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies a light-opaque mask specifically at the light-exit face region where precise light shaping is required, while leaving other regions of the carrier element unchanged. This localized application of the mask achieves the desired light shaping precision without requiring complex manufacturing processes for the entire component.
3Illumination intensity
If the light spot is made very small to achieve maximum intensities, then light intensity is improved, but light use efficiency may be reduced due to yellow coloring interference
Solution Approach 1:
The patent optimizes the parameters of the lighting element and carrier element configuration to achieve a balance between light intensity and efficiency. By carefully selecting the size, material properties, and geometric parameters of these components, the system maximizes light intensity while minimizing energy loss from yellow coloring interference.
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 enables focused and efficient light emission with reduced aberrations, enhancing light use efficiency and intensity while minimizing interference from yellow coloring, suitable for both main beam and homogeneous illumination applications.
Implementation Method 1
at least one lighting element (3), which is excitable to emit visible light when illuminated by laser light
Implementation Method 2
at least one light-transmissive carrier element (4), wherein the carrier element has at least one light-entry face (4a) and at least one light-exit face (4b) lying opposite the light-entry face (4a)
Data Source
AI summary
A lighting module (1) for a vehicle headlamp (2), wherein the lighting module (1) comprises at least one lighting element (3), which is excitable to emit visible light when illuminated by laser light, and at least one light-transmissive carrier element (4), wherein the carrier element (4) has at least one light-entry face (4a) and at least one light-exit face (4b) lying opposite the light-entry face (4a), wherein the at least one lighting element (3) is arranged at the at least one light-entry face (4a) of the carrier element (4) in order to radiate light into the light-entry face (4a), wherein a) the at least one light-exit face (4b) of the carrier element (4) is delimited by a light-opaque mask (5) surrounding the light-exit face (4b) or b) the at least one light-exit face (4b) reaches up to the side faces (6a to 6d) of the carrier element (4), wherein at least one side face (6b) has two side portions (6b′, 6b″) adjoining one another, said side portions being inclined relative to one another for forming a light/dark boundary.