Automobile Lamp Micro Lens Array Shield Offset
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Solution Overview
Problem
Existing automobile lamps with micro lens arrays face significant optical efficiency deterioration due to excessive light blocking by shields, which are necessary to create a cut-off line for low beam patterns.
Innovation Solution
The design includes a micro lens array module with an entrance lens array, an exit lens array, and a shield unit where the optical axes of the exit lenses are spaced apart from the entrance lenses, and the shield's cut-off line is positioned to minimize light blocking, allowing more light to be emitted effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a shield is provided to create a cut-off line for low beam pattern, then the low beam pattern can be formed, but a large portion of light is blocked and optical efficiency deteriorates
Solution Approach 1:
The shield is divided into multiple segments corresponding to different lens groups, with each segment creating a cut-off line for its associated lenses. This segmentation allows light to pass through regions corresponding to other lens groups, reducing overall light blocking while maintaining the low beam pattern shape requirement.
Solution Approach 2:
Different regions of the shield have different transparency characteristics - some regions are transparent to allow light passage, while other regions have cut-off lines to block light for specific lens groups. This local differentiation enables the shield to simultaneously maintain beam pattern shape and reduce light blocking.
2Device complexity
If the optical axis of the exit lens is aligned with the entrance lens, then the optical path is simplified, but the shield blocks more light and reduces optical efficiency
Solution Approach 1:
The optical axis of the exit lens is intentionally offset from the optical axis of the entrance lens in the downward and side direction. This asymmetric arrangement shifts the light path away from the shield's cut-off line regions, reducing light blocking while still forming the required beam pattern.
Solution Approach 2:
The optical axis offset is implemented in both vertical (downward) and horizontal (side) dimensions, creating a two-dimensional displacement. This multi-dimensional adjustment allows the light path to bypass shield blocking regions more effectively than a single-dimensional offset would provide.
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 significantly reduces light blocking by the shield, enhancing the optical efficiency of the lamp by ensuring that high luminosity regions are not obscured, resulting in a more effective beam pattern.
Implementation Method 1
a micro lens array (MLA) module which is provided in front of the light source and on which the light is incident
Implementation Method 2
capable of forming a specific pattern on a road surface through an optical system
Data Source
AI summary
A lamp for an automobile includes a micro lens array (MLA) module that includes an entrance lens array including entrance lenses, an exit lens array including exit lenses, and a shield unit including shields provided between the entrance lens array and the exit lens array. An optical axis of the exit lens, provided in front of at least a portion of the plurality of entrance lenses to face the entrance lens, is spaced apart from an optical axis of the entrance lens in the downward direction and one side direction. A cut-off line region provided on an upper edge of the shield, provided in front of at least a portion of the plurality of entrance lenses to face the entrance lens, is spaced apart from an optical axis of the entrance lens in the downward direction and one side direction.