Vehicle Rear Lamp Module Optical Coupling Design
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Solution Overview
Problem
The existing rear lamp modules for vehicles require complex and costly installation processes due to the need for extensive wiring and multiple light sources, which increases manufacturing costs and complexity.
Innovation Solution
A rear combination lamp configuration featuring a first rear lamp module with a main light source on the vehicle's side and a second rear lamp module on the back door, where the second module receives light from the first and uses a light direction changing unit with a guiding, reflective, and diffusion member to output light, eliminating the need for a light source on the back door and simplifying wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light source is installed on the back door (second rear lamp module), then the lamp can emit light independently, but the wiring complexity and installation cost increase
Solution Approach 1:
The patent extracts the light source from the second rear lamp module (back door) and relocates it to the first rear lamp module (side portion). The second module retains only the light reception and direction-changing functions, eliminating the need for separate power wiring to the back door while maintaining light emission capability.
Solution Approach 2:
The first rear lamp module serves multiple functions: it provides light for its own illumination and simultaneously serves as the light source for the second rear lamp module. This multi-functionality reduces the overall number of light sources and wiring requirements in the system.
2Adaptability or versatility
If multiple light sources are used in separate lamp modules, then each module can function independently, but the manufacturing cost and installation complexity increase
Solution Approach 1:
The patent merges the light source function into a single module (first rear lamp module) that serves both itself and the second module. This reduces the total number of light sources from two to one, lowering manufacturing costs while maintaining the functional independence of each lamp module through optical coupling.
3Reliability
If extensive wiring is provided to the back door for the second lamp module, then the lamp can be powered independently, but the installation time and cost increase
Solution Approach 1:
The patent extracts the power supply requirement from the second rear lamp module by relocating the light source to the first module. The second module receives power indirectly through optical transmission rather than electrical wiring, eliminating the need for separate power connections to the back door and significantly reducing installation time.
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 simplifies the installation process and reduces costs by eliminating the need for power wiring on the back door, resulting in a more efficient manufacturing process and lower production expenses.
Implementation Method 1
the light direction changing unit includes a light guiding member which guides light received by the light reception unit side to the outside
Implementation Method 2
the reflective member has a reflective surface facing the light guiding member
Implementation Method 3
the diffusion member which overlaps the light guiding member and diffuses light guided by the light guiding member
Data Source
AI summary
A rear combination lamp installed on a vehicle comprises: a first rear lamp module installed on a later part of the rear side of the vehicle; and a second rear lamp module installed on a back door located at the rear side of the vehicle to be arranged adjacent to the first rear lamp module. The first rear lamp module includes a main light source and a sub-light source. The main light source generates light output from the first rear lamp module, and the sub-light source generates light provided to the second rear lamp module. The second rear lamp module includes a light reception unit and a light direction changing unit. The light reception unit receives light from the sub-light source. The light direction changing unit changes a progressing direction of light received in the light reception unit to output light to the outside.