Vehicle Lamp Reflector Segmentation for Low-Beam Brightness
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Solution Overview
Problem
Existing vehicle lamps struggle to enhance the brightness of the lower vicinity region of the cut-off line on the oncoming vehicle lane side in low-beam light distribution patterns, particularly when a vehicle is traveling on a curved path, while avoiding glare and achieving precise control over the light distribution pattern.
Innovation Solution
A vehicle lamp configuration featuring a light source with a first and second light emitting element, where the second reflecting surface is positioned in the surface normal direction of the second light emitting element on the lamp front side of the first reflecting surface, forming a bright light distribution pattern with a small vertical width to improve forward visibility without causing glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a reflecting region positioned near the front end edge of the reflecting surface is used, then a small light source image is formed with small vertical width, but insufficient reflected light amount is obtained
Solution Approach 1:
The reflector is divided into two distinct reflecting regions: a first reflecting region for forming the main light distribution pattern, and a second reflecting region for forming the brightness enhancement light distribution pattern. This segmentation allows each region to be optimized independently - the second region can be positioned to create a compact pattern with small vertical width while the first region provides sufficient overall light output.
Solution Approach 2:
Different regions of the reflector are assigned different functional qualities. The second reflecting region is specifically positioned and shaped to create a concentrated light distribution with small vertical width for enhancing brightness in the lower vicinity region of the cut-off line, while the first reflecting region handles the main illumination requirements.
2Illumination intensity
If a reflecting region closer to the light emitting element is used, then sufficient reflected light is obtained, but the light source image becomes large with large vertical width
Solution Approach 1:
The reflector is divided into two distinct reflecting regions: a first reflecting region for forming the main light distribution pattern, and a second reflecting region for forming the brightness enhancement light distribution pattern. This segmentation allows each region to be optimized independently - the second region can be positioned to create a compact pattern with small vertical width while the first region provides sufficient overall light output.
Solution Approach 2:
The solution transitions from considering only the radial distance from the light emitting element to also considering the angular position and surface normal direction. The second reflecting region is positioned not just at a certain distance but specifically in the surface normal direction of the light emitting element, adding a dimensional constraint that controls the vertical width of the resulting light distribution pattern.
3Illumination intensity
If the second reflecting surface is positioned in the surface normal direction of the second light emitting element on the lamp front side of the first reflecting surface, then a bright light distribution pattern with small vertical width is formed, but the structure becomes more complex
Solution Approach 1:
The first and second reflecting surfaces are merged into a single integrated reflector structure rather than being separate components. This combining approach maintains the functional benefits of having distinct reflecting regions while reducing overall device complexity by eliminating the need for separate mounting structures and alignment mechanisms for independent reflectors.
Solution Approach 2:
The single reflector structure serves multiple functions: it forms the main light distribution pattern through the first reflecting region and simultaneously creates the brightness enhancement pattern through the second reflecting region. This multi-functionality reduces the number of components needed and simplifies the overall lamp structure.
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 configuration enhances forward visibility when a vehicle is on a curved path by forming a bright light distribution pattern with a small vertical width, reducing the likelihood of glare and allowing for precise control over the light distribution, thereby improving safety.
Implementation Method 1
light emitted from a light source is reflected toward a front of the lamp by a reflector so as to form a low-beam light distribution pattern
Implementation Method 2
a second reflecting surface which is configured to reflect light emitted from the second light emitting element so as to form a second light distribution pattern for enhancing brightness of a lower vicinity region of a cut-off line on an oncoming vehicle lane side
Data Source
AI summary
A vehicle lamp includes a light source, and a reflector which reflects light emitted from the light source to form a low-beam light distribution pattern. The light source includes first and second light emitting elements. The reflector includes a first reflecting surface which reflects light emitted from the first light emitting element to form a first light distribution pattern configuring a part of the low-beam light distribution pattern, and a second reflecting surface which reflects light emitted from the second light emitting element to form a second light distribution pattern for enhancing brightness of a lower vicinity region of a cut-off line on an oncoming vehicle lane side. The second reflecting surface is arranged in a surface normal direction of a light emitting surface of the second light emitting element on a front side of the first reflecting surface.