Vehicle Headlamp Lighting Module with Shared Optics
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Solution Overview
Problem
Existing automobile headlamp systems, particularly the dipped beam function, inadequately illuminate the side of the road beyond the adjacent lane, posing a safety risk as pedestrians or vehicles may not be visible soon enough to the driver.
Innovation Solution
A compact lighting module with shared light sources, a reflector, and a lens that optimizes light distribution to provide greater illumination in the lower parts of the image, ensuring sharp vertical edges and comfortable lighting, reducing the device's volume and enhancing visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple projector modules are juxtaposed to illuminate different vertical bands, then the scene can be selectively illuminated in different zones, but the device volume becomes cumbersome
Solution Approach 1:
The patent combines multiple light sources (at least three LEDs arranged vertically) into a single projector module that shares common optical components (reflector and lens). This merging approach allows the module to produce multiple vertical bands of illumination simultaneously, achieving the selective illumination capability of multiple modules while reducing the overall device volume by eliminating redundant components.
Solution Approach 2:
The single projector module is designed to perform multiple functions by using at least three light sources that can be independently controlled to illuminate different vertical zones. The shared reflector and lens system handles illumination for all zones, making the module universal in its ability to provide adaptive road lighting, lane lighting, and roadside illumination through a single integrated unit.
2Ease of manufacture
If a conventional reflector shape is used, then the manufacturing is simple, but the light distribution does not provide sufficient illumination in the lower parts of the scene
Solution Approach 1:
The reflector is designed with a specific curved cross-sectional shape that creates different optical properties in different regions. The curvature is designed to redirect light from the vertically arranged LED sources such that the lower vertical bands receive enhanced illumination. This local quality adjustment in the reflector geometry ensures that light is preferentially directed toward the lower parts of the scene while maintaining manufacturability through a consistent curved surface design.
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 provides improved illumination of the roadside beyond the adjacent lane, enhancing driver visibility and safety by ensuring that the lighting is more intense in the lower parts of the image, reducing the risk of missing pedestrians or vehicles.
Implementation Method 1
a lighting module (2) for a motor vehicle headlamp comprising a plurality of light sources (4)
Implementation Method 2
associated with a reflector (8) and with a lens (10)
Implementation Method 3
the lens (10) is arranged so that the image formed by the lens (10) of an object placed at one of its focal points has a sharp outline along its entire length
Data Source
Figure 1~3
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Figure 8~10
AI summary
The module (2) has a set of light sources that is placed successively along a curve (4), a cylindrical reflector (8) and a lens (10) that is ready to receive light of each light source. A set of reflectors is arranged so as to form a luminous spot for the light emitted by the light sources. Luminous distribution in the luminous spot is modified with regard to luminous distribution of the light sources. The lens presents two foci and a focal zone, where the lens is arranged such that images of object formed by the lens are placed on the foci so as to allow the images to be sharp.