Rear Vehicle Lighting With External Reflection for Diffused Tail Light
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Solution Overview
Problem
Existing lighting devices for the rear end of motor vehicles lack a design that creates an appealing external impression and effectively utilizes light reflection to enhance visibility and functionality.
Innovation Solution
A lighting device with a reflection device outside the housing that reflects light emitted downwards to create a tail light and/or brake light, utilizing diffusing structures and reflective layers to achieve a diffused and attractive light distribution, and incorporating multiple reflective surfaces to enhance light homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If light is emitted directly from the lighting device rearward, then the lighting function is simple and direct, but the external appearance is unappealing and lacks visual interest
Solution Approach 1:
A reflection device is introduced as an intermediary element between the light source and the external environment. This reflection device receives light from the lighting device and redirects it backward at oblique angles, creating an appealing external appearance while maintaining the simplicity of the original lighting structure.
Solution Approach 2:
The patent changes the dimensional direction of light propagation by introducing the reflection device that redirects light from a direct rearward path to an oblique backward path. This dimensional change creates visual interest and appeal while the light source itself remains simple and direct.
2Adaptability or versatility
If light is emitted downwards through the housing, then license plate lighting is achieved, but the tail light function is compromised or requires additional light sources
Solution Approach 1:
The lighting device is designed to perform multiple functions: the light source serves both as a tail light source and as a source for license plate lighting. The reflection device enables the same light to fulfill both purposes by redirecting it appropriately, eliminating the need for separate light sources for different functions.
Solution Approach 2:
The system uses its own emitted light to serve multiple purposes. The light emitted downward for license plate lighting also serves the tail light function through the reflection device, making the system self-sufficient and eliminating the need for additional dedicated tail light sources.
3Illumination intensity
If a reflection device is added outside the housing, then light distribution is enhanced and appearance is improved, but the device complexity increases
Solution Approach 1:
The reflection device acts as a simple intermediary element that enhances light distribution without requiring complex internal modifications to the housing or light sources. It is positioned outside the housing and provides oblique reflection with minimal structural complexity.
Solution Approach 2:
The reflection device is positioned specifically at the lower rear area of the lighting device, providing localized enhancement to the light distribution in the oblique backward direction. This local placement optimizes the effect without requiring the entire device structure to be complex.
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 provides an appealing external appearance while ensuring effective light distribution and enhanced visibility, particularly for tail and brake lights, through diffused reflection and multiple reflections.
Implementation Method 1
the lighting device is arranged such that the light emitted downwards through the at least one first exit surface at least partially strikes on the reflection device and is at least partially reflected by the reflection device such that it moves away from the rear end of the motor vehicle rearward
Implementation Method 2
The reflection device has a diffusing structure. The diffusing structure allows the light to be at least partially reflected back diffusely.
Data Source
AI summary
A lighting device for a motor vehicle is provided. The lighting device includes: a first light source and a second light source; a housing on or in which the first light source and the second light source are arranged; and a first exit surface for light emitted by the first light source and a second exit surface for light emitted by the second light source. In the installed state, light generated by the first light source emits at least partially downwards from the housing through the first exit surface, and light generated by the second light source emits at least partially rearwards from the housing through the second exit surface. The lighting device further includes a reflection device outside of the housing. Light emitted downwards through the first exit surface strikes the reflection device and is reflected by the reflection device so that it moves rearwards from the motor vehicle.