Vehicle Lamp Light Guiding Rod Uniform Diffusion
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Solution Overview
Problem
Conventional vehicle lamps face difficulties in uniformly emitting light from light sources incident on one and other end surfaces to the outer peripheral surface, leading to non-uniform light distribution and spotlight generation.
Innovation Solution
A vehicle lamp design featuring a light guiding rod with specific surface regions and configurations, including knurls and triangular prism-shaped lens cuts, to diffuse light emitted from multiple sources in orthogonal directions, ensuring uniform light emission without spotlight generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is emitted from light sources and incident on one end surface and the other end surface of a light guiding rod, then light can be guided along the light guiding rod, but the light cannot be uniformly emitted from the outer peripheral surface, resulting in spotlight generation
Solution Approach 1:
The outer peripheral surface of the light guiding rod is segmented into multiple distinct surface regions (first surface with first and second regions, third region, and second surface) positioned at different locations along the light guiding rod. Each region has specific light diffusing functions, where the first and second regions diffuse light in a direction orthogonal to the prescribed direction, and the second surface diffuses light in the prescribed direction. This segmentation allows different portions of incident light to be diffused in different directions, achieving uniform light emission from the lateral surface and preventing spotlight generation.
2Ease of manufacture
If the outer peripheral surface of the light guiding rod is smooth, then manufacturing is easier, but light emission is not uniform and spotlight is generated
Solution Approach 1:
Different regions of the outer peripheral surface are given different local qualities and functions. The first surface includes first and second regions configured to diffuse light in a direction orthogonal to the prescribed direction, while the second surface is configured to diffuse light in the prescribed direction. The third region is positioned between the first and second regions. This local differentiation of surface properties ensures that light is diffused uniformly in multiple directions from different regions, achieving uniform light emission without requiring complex overall surface processing.
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 achieves uniform light emission by diffusing light in both vertical and horizontal directions, reducing spotlight formation and ensuring consistent light distribution across the outer peripheral surface.
Implementation Method 1
the first region and the second region are configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in a direction orthogonal to the prescribed direction, respectively
Implementation Method 2
the second surface is configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in the prescribed direction
Data Source
AI summary
Provided is a vehicle lamp capable of uniformly emitting light, which is emitted from light sources and incident on one end surface and the other end surface, from the front surface (lateral surface) thereof. The vehicle lamp includes a light guiding rod extending in a prescribed direction. The light guiding rod includes a front surface, and a rear surface. The front surface includes a first region, a second region, and a third region positioned between the first region and the second region. The first region and the second region are configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in a direction orthogonal to the prescribed direction, respectively. A rear surface is configured to diffuse the light emitted from the first light source and the light emitted from the second light source, in the prescribed direction.