Vehicular Lamp Reflector Segmentation for Wide Daytime Running Light
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Solution Overview
Problem
Existing vehicular lamps do not effectively emit light over a wide range in the second lighting mode due to limited light distribution patterns, particularly in the daytime running lamp lighting mode, where the first reflector does not utilize its full potential for light emission.
Innovation Solution
The vehicular lamp is designed with a reflector that includes first and second reflective surfaces, where the light from the first light emitting element is incident only on the first reflective surface, and the light from the second light emitting element is incident on both reflective surfaces, allowing for distinct light distribution patterns in each mode, thereby enabling the reflector to emit light over a wider range in the second lighting mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reflector is used to reflect light from multiple light emitting elements, then the device complexity is reduced, but the light distribution pattern cannot be optimized for different lighting modes
Solution Approach 1:
The reflector is divided into multiple reflective surfaces (first reflective surface and second reflective surface), each optimized for specific lighting modes. This segmentation allows different light distribution patterns while using a single integrated reflector component.
Solution Approach 2:
Different regions of the reflector have different reflective properties tailored to specific functions. The first reflective surface is optimized for high beam mode while the second reflective surface is optimized for daytime running lamp mode, allowing each region to perform its specialized function.
2Illumination intensity
If the first reflector is formed of a light-transmitting material with light transmitting regions, then light can pass through to create illumination patterns, but the reflector cannot emit light over a wide range in the second lighting mode
Solution Approach 1:
The solution moves from relying solely on light transmission through the reflector to utilizing light reflection from multiple surfaces. By incorporating a second reflective surface that reflects light in different directions, the system achieves wide-range light emission without depending on light transmission through the first reflector.
3Quantity of substance
If light from the first light emitting element is incident on both reflective surfaces, then more light can be distributed, but the light distribution pattern cannot be optimized for high beam mode
Solution Approach 1:
The patent extracts the high beam light distribution function to be handled exclusively by the first reflective surface, which receives light only from the first light emitting element. This separation ensures that the high beam pattern is not contaminated by light from the second reflective surface, maintaining pattern precision.
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 allows for efficient formation of both high beam and daytime running lamp light distribution patterns, ensuring the lamp is visible from outside during daylight and reducing the number of components by mounting light emitting elements on a common substrate, while also allowing for brighter light emission in the second lighting mode without additional members.
Implementation Method 1
a reflector that reflects and controls light emitted from first and second light emitting elements
Data Source
AI summary
Provided is a lamp unit including a reflector that reflects and controls light emitted from first and second light emitting elements. The reflector includes first and second reflective surfaces. In addition, the light emitted from the first light emitting element in a headlamp lighting mode (a first lighting mode) is incident on the first reflective surface and not on the second reflective surface, and the light emitted from the second light emitting element in a daytime running lamp lighting mode (a second lighting mode) is incident on the first and second reflective surfaces.