Vehicular Headlamp Projection Optical Systems
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Solution Overview
Problem
Existing vehicular lamp fittings struggle to individually optimize the brightness or resolution of each enlargedly projected light source image, as using multiple projection lenses with the same configuration limits the ability to customize these parameters.
Innovation Solution
The use of multiple projection optical systems with varying image circles and F-numbers allows for individual optimization of brightness and resolution for each light source image, where the image circle of one projection optical system is smaller than another, and the F-number of one system is smaller than the other, enabling tailored light distribution patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple projection lenses with the same configuration are used, then the structure is simple and easy to manufacture, but the brightness and resolution of each light source image cannot be individually optimized
Solution Approach 1:
The patent applies local quality by assigning different optical parameters (image circle size and F-number) to different projection lenses based on their specific positions and functions. Each lens is customized with parameters optimized for its particular light source image, allowing individual optimization of brightness and resolution for each projection position while maintaining overall system functionality.
Solution Approach 2:
The patent implements parameter changes by varying the image circle size and F-number across different projection lenses. These parameter variations enable each lens to project light source images with optimized brightness and resolution characteristics, directly addressing the need for individual optimization while maintaining a relatively simple overall lens array structure.
2Manufacturing precision
If multiple projection lenses with different configurations are used, then the brightness and resolution can be individually optimized, but the device complexity increases
Solution Approach 1:
The patent manages device complexity through local quality by making targeted parameter adjustments only where needed. Different projection lenses have different image circles and F-numbers optimized for their specific positions, but the overall lens array structure remains relatively simple and systematic, avoiding unnecessary complexity while achieving the required optimization precision.
3Manufacturing precision
If projection lenses with different image circles are used, then the resolution of each light source image can be optimized, but the uniformity of light distribution decreases
Solution Approach 1:
The patent balances resolution optimization and uniformity through controlled parameter changes. By systematically varying the image circle size and F-number across different projection lenses according to their specific requirements, the system achieves optimized resolution for each light source image while maintaining relatively uniform overall light distribution through coordinated parameter selection.
4Illumination intensity
If projection lenses with different F-numbers are used, then the brightness of each light source image can be optimized, but the complexity of the optical system increases
Solution Approach 1:
The patent optimizes brightness while managing optical system complexity through targeted F-number variations. Each projection lens has its F-number selected and adjusted to achieve the desired brightness level for its specific light source image, creating a relatively simple yet effective optical system with optimized illumination intensity distribution across all projection positions.
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 approach enables the formation of adaptive driving beam light distribution patterns with optimized brightness and resolution, providing enhanced visibility and preventing uneven light distributions, thus improving the vehicular lamp fitting's performance.
Implementation Method 1
a first projection optical system and a second projection optical system in front of the first light source and the second light source, respectively, each having a different image circle and a different F-number
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A vehicular lamp fitting (10) that forms a predetermined light distribution pattern including a plurality of light source images (I1, I2) arranged in a horizontal direction comprises first and second light sources (LS1, LS2), and first and second projection optical systems (OP1, OP2) corresponding to the first and second light sources respectively, wherein the first (second) light source is disposed such that a side of the first (second) light source and an optical axis of the first (second) projection optical system are spaced apart by a first (second) distance, the second distance being longer than the first distance, an image circle of the first projection optical system is smaller than an image circle of the second projection optical system, F-number of the first projection optical system is smaller than F-number of the second projection optical system, the first (second) light source is disposed in the image circle of the first (second) projection optical system.