Double-Window Headlamp Layout for Heat Relief and Compact Optics
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Solution Overview
Problem
Existing vehicle projectors require a large size to accommodate optical elements and suffer from overheating issues due to insufficient distance between the bulb and reflector, particularly in recessed designs, which affect assembly time and appearance.
Innovation Solution
A projector design with two small windows and a curved section above the lighting module, allowing for improved airflow and reduced heating by positioning the module closer to the window, enabling a wider range of optical element adjustment while maintaining a distinct appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional headlamp with a single headlamp unit is used, then the structure is simple and manufacturing is easy, but the lighting performance is insufficient and it cannot meet current safety requirements
Solution Approach 1:
The headlamp is divided into two separate headlamp units (first and second headlamp units) positioned side by side. Each unit contains its own light source, reflector, and lens assembly. This segmentation allows each unit to be optimized for specific lighting functions while collectively providing superior overall lighting performance that meets modern safety requirements.
2Reliability
If the headlamp is divided into two headlamp units, then lighting performance is improved, but the width of the vehicle increases
Solution Approach 1:
The second headlamp unit is positioned partially within the contour of the first headlamp unit, creating a nested or overlapping arrangement. This nesting strategy allows both headlamp units to be accommodated within a compact width envelope, minimizing the overall width increase while maintaining the lighting benefits of having two separate units.
3Length of moving object
If the second headlamp unit is positioned close to the first, then vehicle width is minimized, but assembly precision requirements increase
Solution Approach 1:
The two headlamp units are designed with asymmetric positioning where the second unit is offset and partially nested within the first unit's contour rather than being symmetrically placed. This asymmetric arrangement creates distinct mounting interfaces and spatial relationships that simplify assembly fixtures and positioning mechanisms, thereby reducing the precision requirements compared to a symmetric close-proximity arrangement.
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 design effectively evacuates heat and allows for greater optical element movement, reducing projector depth and preventing overheating, while maintaining the illusion of separate headlights.
Implementation Method 1
a reflector (20) arranged behind the at least one light source (10)
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed is a motor vehicle headlamp comprising a housing (3) on which a lens (2) is attached, two lighting modules arranged in the housing, the lens (2) comprising a first region (21), referred to as the first window (21), arranged facing a first lighting module (4) and a second region (22), referred to as the second window (22), arranged facing a second lighting module, the lens (2) having a recess (23) extending from one edge to the other of the lens (2), between the first window (21) and the second window (22), the recess having a back wall (230) arranged in the back of the reinforcement (23), a first side wall (231) and a second side wall (232) extending respectively from the back wall (230) to, respectively, an edge of the first window (21) and an edge of the second window (22), and for which the back wall (230) has a region (235) curved towards the exterior of the headlamp (2).