Straddled Vehicle Lighting Device with Inclined Surfaces
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Solution Overview
Problem
Straddled vehicle lighting devices using light emitting diodes face challenges in achieving wide-range illumination due to the high directivity of LEDs, leading to increased manufacturing costs and limited light guiding capabilities, especially when only one LED is used.
Innovation Solution
A lighting device design featuring a single LED and a transparent outer lens with distinct light transmitting portions, including a first and second inclined surface, where the second inclined surface has a larger inclination angle, allowing light to be directed and reflected for wider coverage, thereby enhancing conspicuity without increasing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large number of light emitting diodes are provided to improve conspicuity, then the illumination range is improved, but the manufacturing cost increases
Solution Approach 1:
The outer lens is divided into multiple light transmitting portions (first light transmitting portion and second light transmitting portion) that are arranged at different positions. This segmentation allows a single LED to illuminate multiple discrete areas through the lens, effectively increasing the overall illumination range without requiring multiple LEDs.
Solution Approach 2:
The patent extends the illumination in the direction perpendicular to the optical axis by adding the second light transmitting portion. This dimensional extension allows light to be transmitted in multiple directions (front and side), expanding the illumination coverage from a single-axis pattern to a multi-dimensional pattern without increasing the number of light sources.
2Area of stationary object
If the outer lens has a long shape perpendicular to the optical axis to increase illumination range, then the light guiding capability is improved, but the degree of freedom of light guiding path is reduced when integrally formed
Solution Approach 1:
The outer lens is segmented into distinct light transmitting portions (first and second portions) with different functions. The first light transmitting portion handles direct light transmission, while the second light transmitting portion handles reflected light. This functional segmentation provides design flexibility in optimizing light paths for each portion independently.
Solution Approach 2:
The reflector acts as an intermediary element that redirects light from the LED toward the second light transmitting portion. This intermediary structure enables the creation of complex light paths without requiring the entire outer lens to be designed for direct light transmission, thereby increasing the degree of freedom in light guiding path design.
3Quantity of substance
If only one light emitting diode is provided to reduce manufacturing cost, then the manufacturing cost is reduced, but the ability to illuminate wide range of outer lens is reduced
Solution Approach 1:
The outer lens is divided into multiple light transmitting portions positioned at different locations. A single LED can illuminate the first light transmitting portion directly, and through the reflector, illuminate the second light transmitting portion. This segmentation of the lens allows one light source to effectively illuminate multiple discrete areas, achieving wide-range illumination with minimal cost.
Solution Approach 2:
The reflector serves as a mediating optical element that redirects light from the single LED toward the second light transmitting portion. This intermediary structure enables the single LED to illuminate areas that would otherwise require additional light sources, maintaining cost-effectiveness while expanding illumination range.
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 design effectively spreads light from a single LED over a wider area, improving conspicuity while maintaining cost-effectiveness by utilizing integrated light transmitting portions with inclined surfaces to redirect light efficiently.
Implementation Method 1
The first inclined surface guides light from the light emitting diode guided in the first light transmitting portion toward the outside of the outer lens
Implementation Method 2
The second inclined surface reflects the light from the light emitting diode guided in the first light transmitting portion toward the second light transmitting portion and guides the light into the second light transmitting portion
Data Source
AI summary
A first inclined surface and a second inclined surface are inclined with respect to an optical axis of a light emitting diode. The first inclined surface guides light from the light emitting diode guided in the first light transmitting portion toward an outside of an outer lens. An inclination angle of the second inclined surface with respect to the optical axis is larger than an inclination angle of the first inclined surface with respect to the optical axis. The second inclined surface reflects the light from the light emitting diode guided in the first light transmitting portion toward the second light transmitting portion and guides the light into the second light transmitting portion.