Angled Cutoff Reflector for Automotive Lighting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lighting apparatuses face challenges in forming cutoff lines that intersect at angles without a complex structure, which affects the clarity and effectiveness of low beam light distribution patterns for improved long-distance visibility.
Innovation Solution
A lighting apparatus with a reflector that forms a low beam light distribution pattern featuring a first and second cutoff line, where both lines are formed by reflection images of the same edge of the light emitting surface, utilizing a hot zone and diffused pattern forming portions to create distinct and clear cutoff lines without a complicated reflector structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex reflector structure is used to form angled cutoff lines, then the clarity of cutoff lines is improved, but the device complexity increases
Solution Approach 1:
The reflector is divided into multiple reflection regions (first reflection region and second reflection region) with different reflective properties. The first reflection region has high reflectivity for forming the hot zone light distribution, while the second reflection region has low reflectivity for forming the diffused light distribution. This segmentation allows each region to independently contribute to forming clear angled cutoff lines without requiring a complex overall reflector structure.
Solution Approach 2:
Different regions of the reflector are assigned different local optical properties. Specifically, the first reflection region positioned near the optical axis has high reflectivity to concentrate light and form sharp cutoff lines, while the second reflection region positioned away from the optical axis has low reflectivity to create diffused light distribution. This local quality differentiation enables clear angled cutoff lines to be formed without complicating the entire reflector structure.
2Adaptability or versatility
If multiple light emitting devices are used to form hot zone and diffused patterns, then the light distribution control is improved, but the device complexity increases
Solution Approach 1:
A single light emitting device is designed to perform multiple functions through the use of a multi-region reflector. The same light source simultaneously generates both the hot zone light distribution pattern and the diffused light distribution pattern by reflecting light differently in the first and second reflection regions. This eliminates the need for multiple separate light emitting devices while maintaining versatile light distribution control.
Solution Approach 2:
The functions of multiple light emitting devices (hot zone formation and diffused pattern formation) are merged into a single light emitting device combined with a multi-region reflector system. The reflector integrates both the high-reflectivity first reflection region and the low-reflectivity second reflection region, allowing one light source to produce both concentrated and diffused light patterns simultaneously, thereby reducing device complexity.
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 enables the formation of clear cutoff lines that intersect at angles, enhancing long-distance visibility by improving illuminance in the hot zone and maintaining a simple reflector configuration, thus reducing costs and complexity.
Implementation Method 1
a reflector configured to reflect light from the light source to form a light distribution pattern having a first cutoff line and a second cutoff line such that the first cutoff line and the second cutoff line form an angle with each other. The reflector is configured to form the first cutoff line and the second cutoff line by reflection images of the same edge of the light emitting surface.
Data Source
AI summary
A lighting apparatus is provided. The lighting apparatus includes a licht source having a light emitting surface, and a reflector configured to reflect light from the light source to form a light distribution pattern (PL, PA) having a first cutoff line and a second cutoff line such that the first cutoff line (CL1) and the second cutoff line (CL2) form an angle with each other. The reflector is configured to form the first cutoff line and the second cutoff line by reflection images of the same edge of the light emitting surface.