Vehicle Headlight Light Module with Split Lens Light Homogenization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light-emitting modules for vehicles face challenges in achieving homogeneous light distribution and compact design while meeting regulatory requirements, often necessitating additional components and increased manufacturing costs.
Innovation Solution
A light-emitting module design featuring a transparent unit with a length of at least 6 mm, divided lens regions with distinct focal points, and integrated shutter within the light-reflecting device, allowing for efficient light homogenization and reduced overall length without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light propagates through air between the light-reflecting device and the lens focal point, then homogeneous light distribution is achieved, but the module length increases to 100 mm or more
Solution Approach 1:
The patent introduces a transparent unit as an intermediary medium between the light-reflecting device and the lens. This transparent unit has light-exit surfaces positioned at specific distances (6-30mm from first focal point, 3-15mm from second focal point) to enable light homogenization through a shorter path compared to air propagation, thereby reducing the overall module length while maintaining homogeneous light distribution.
2Illumination intensity
If a separate shutter is positioned between the light-reflecting device and the lens focal point to create the cut-off line, then the required light distribution pattern is achieved, but the manufacturing process becomes more complicated
Solution Approach 1:
The patent merges the shutter function with the transparent unit by positioning the light-exit surfaces of the transparent unit at specific distances from the focal points. This integration eliminates the need for a separate shutter component, simplifying the manufacturing process while still achieving the required cut-off line in the light distribution pattern through the optical arrangement.
3Length of moving object
If multiple lenses are arranged in a row along the optical axis to shorten the focal length, then the module length is reduced, but the manufacturing costs increase and optical efficiency decreases
Solution Approach 1:
The patent changes the dimensional arrangement by positioning light-exit surfaces at specific distances from two different focal points (first and second focal points) rather than arranging multiple lenses in a row along the optical axis. This dimensional reconfiguration achieves module length reduction while maintaining optical efficiency and avoiding the increased manufacturing costs associated with multiple lens arrangements.
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 achieves homogeneous light distribution and significantly reduces the total length of the module to approximately 55 mm, enhancing compactness and lowering manufacturing complexity and costs.
Implementation Method 1
a light-reflecting device (comprising a total internal reflecting unit) is configured to reflect all the light emitted by the light source into parallel and/or convergent beams
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention concerns a light-emitting module (100) for a vehicle, comprising a light source unit (120), a light-reflecting device (140) and a lens (160). The light-reflecting device comprises a total internal reflecting unit (142) to reflect the light emitted by the light source unit, and a transparent unit (144). The lens comprises a light-entry lens surface (162) and an optical axis. The transparent unit (144) has a minimum length of 6 mm along the direction of the optical axis of the lens (160). The light-entry lens surface comprises at least two lens regions, with different focal points, along a direction perpendicular to the optical axis of the lens (160). The light source unit (120) comprises at least two light source regions in the direction perpendicular to the optical axis of the lens (160), with light emitted from each light source region being directed towards a respective lens region.