Dual-Function Vehicle Light Guide Module for Tail and Brake Lighting
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Solution Overview
Problem
Conventional vehicle lighting systems require separate modules for tail lamps and brake lights, leading to increased manufacturing costs, assembly time, and discomfort due to point light sources used in LED applications.
Innovation Solution
A dual-functional lighting module incorporating a light guide layer with lateral and direct solid-state light sources that emit light in different directions, allowing for both surface-illuminated and intensified illumination effects in a single module, capable of serving as both a tail lamp and brake light, with the ability to provide a blinking effect for direction lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple point light sources (LEDs) are gathered to generate surface light source effect, then the illumination area is increased, but the human visual perception becomes uncomfortable due to dazzling brightness
Solution Approach 1:
A light guide layer is introduced as an intermediary between the point light sources and the external environment. This light guide layer receives light from multiple LEDs and redistributes it to create a uniform surface light source effect, eliminating the dazzling point sources while maintaining large illumination area
Solution Approach 2:
The patent changes the light distribution parameters by using a light guide layer with specific optical properties. The layer transforms the spatial distribution of light from concentrated point sources to a uniform surface distribution, altering the intensity parameters to achieve comfortable illumination
2Illumination intensity
If separate lighting modules are used for tail lamps and brake lights, then the illumination intensity requirements are met, but the manufacturing cost increases
Solution Approach 1:
The lighting module is designed with multi-functionality, serving both as tail lamp and brake light. The light guide layer can be selectively illuminated to provide different functions: uniform surface illumination for tail lamp mode and intensified light for brake light mode, eliminating the need for separate modules
Solution Approach 2:
The patent merges the tail lamp and brake light functions into a single integrated module. By combining multiple LEDs and a light guide layer, the system achieves both functions in one unit, reducing manufacturing cost and assembly complexity
3Illumination intensity
If separate lighting modules are used for tail lamps and brake lights, then the illumination requirements are satisfied, but the assembly working hours increase
Solution Approach 1:
The patent combines tail lamp and brake light functions into a single integrated module, reducing the number of components that need to be assembled. This merging approach directly reduces assembly working hours and simplifies the installation process
4Device complexity
If conventional LED point sources are used, then the lighting module structure is simple, but the illumination effect is limited to strip-shaped instead of surface-illuminated
Solution Approach 1:
The light guide layer serves as an intermediary that transforms the illumination shape from strip-shaped to surface-illuminated. By positioning LEDs on the side surfaces of the light guide layer and using optical redistribution, the system achieves a surface light source effect while maintaining relatively simple module 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
The dual-functional lighting module reduces manufacturing costs and assembly time by integrating tail and brake light functions into one module, providing enhanced illumination intensity and comfort through a surface-illuminated light source with adjustable light distribution and intensity.
Implementation Method 1
A plurality of lateral solid-state light sources is located on the side surface of the light guide layer and emits a first light, and the first light is guided by the side surface of the light guide layer and is led out of the top surface
Implementation Method 2
the bottom surface of the light guide layer is disposed with a plurality of lower light deflection structures for reflecting and refracting the light toward the top surface of the light guide layer
Implementation Method 3
the bottom surface of the light guide layer is disposed with a plurality of lower light deflection structures for reflecting and refracting the light toward the top surface of the light guide layer
Data Source
Figure 1~2
Figure 3A~3F
Figure 4
AI summary
A vehicle dual-functional lighting module (100) is provided, including a light guide layer (10) having a top surface (10t), a bottom surface (10b) and at least one side surface (10s), one lateral solid-state light source (21) located on the side surface (10s) of the light guide layer (10) and emitting a first light (LI) in a first direction, and one direct light solid-state light source (22) located below the light guide layer (10) and emitting a second light (L2) selectively in a second direction. The first light (LI) is guided by the side surface (10s) and led out of the top surface (lOt) to present a surface-illuminated surface light source. The first direction is substantially perpendicular to the second direction. The second light (L2) is emitted toward the top surface (10t) to present an intensified light source which is located in the surface light source to selectively enhance the illumination intensity locally of the surface light source. A vehicle dual-functional lighting set (200) is also provided.