Vehicular Lamp Same-Plane Light Source Layout
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Solution Overview
Problem
Conventional vehicular lamps require separate substrates and complex shapes for first and second light sources due to the need for different levels, leading to inefficient light usage and complicated designs.
Innovation Solution
A vehicular lamp design where the first and second light sources are disposed on the same plane, using a reflector with dual reflective surfaces and a second lens to transmit light from the second light source to the first lens, allowing for overlapping passing and traveling light distribution patterns without level differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the second light source is disposed below the first light source to guide light through a translucent member, then the light can be reflected to the projection lens, but the translucent member becomes large and the light source mounting structure becomes complicated
Solution Approach 1:
The patent changes the spatial arrangement from vertical stacking (different levels) to horizontal arrangement (same plane). The second light source is disposed on the same plane as the first light source, with the second reflective surface positioned laterally adjacent rather than below, eliminating the need for a large translucent member and complex mounting structures.
Solution Approach 2:
The patent merges the mounting plane of both light sources onto the same substrate level. By disposing both light sources on the same plane and using a shared reflector structure with dual reflective surfaces, the design eliminates separate mounting substrates and reduces overall structural complexity.
2Adaptability or versatility
If separate substrates are provided for first and second light sources at different levels, then each light source can be mounted independently, but the overall device complexity increases
Solution Approach 1:
The patent combines both light source mounting functions onto a single substrate level. The first and second light sources are both disposed on the same plane, allowing them to be mounted on the same substrate or closely integrated mounting structure, thereby reducing the number of separate substrates and simplifying the overall mounting architecture.
Solution Approach 2:
The shared reflector structure with dual reflective surfaces serves multiple functions: it reflects light from both the first and second light sources, and it enables both light sources to operate from the same plane. This multi-functional design eliminates the need for separate specialized mounting structures for each light source.
3Use of energy by moving object
If the translucent member is made large to reflect all light from the second light source, then light guidance is effective, but the light source mounting structure becomes complicated
Solution Approach 1:
The patent transitions from using a large translucent member for light guidance to using a reflective surface on the same plane as the light source. The second reflective surface is disposed on the same plane as the first light source, allowing direct reflection of light without requiring a large translucent member, thus maintaining light guidance efficiency while simplifying the mounting 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
Enables a simpler and more efficient design with overlapping light distribution patterns, improved cooling capabilities, and reduced complexity in light source attachment, while maintaining effective light projection.
Implementation Method 1
a reflector that reflects the light emitted from the first light source and the second light source
Implementation Method 2
a first lens that projects the light reflected forward in the optical axis direction by the reflector
Implementation Method 3
a second lens that transmits the light emitted from the second light source toward the reflector
Data Source
AI summary
A vehicular lamp includes a first light source that emits light forming a passing light distribution pattern; a second light source that is disposed forward of the first light source and emits light forming a traveling light distribution pattern; a reflector that reflects the light from the first and the second light sources; a first lens that projects the light reflected forward by the reflector; and a second lens that transmits the light from the second light source toward the reflector. The second light source and the first light source are disposed on the same plane. The reflector has first and second reflective surfaces. The first reflective surface reflects the light from the first light source to the first lens. The second reflective surface is disposed forward of the first reflective surface and reflects the light from the second light source through the second lens to the first lens.