LED Vehicle Lamp Light Guide Column for Uniform Light Emission
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Solution Overview
Problem
Existing LED vehicle lamps suffer from uneven light emission, dark spots, and large light point sizes with high intensity at the center and varying intensity around the light point, lacking the uniformity and efficiency of halogen lamps.
Innovation Solution
The LED vehicle lamp incorporates a light guide column with a truncated cone structure and electroplated areas to ensure total reflection and nearly horizontal light emission, utilizing a truncated cone and recessed conical surfaces to redistribute light evenly, combined with a shell and heat dissipation assembly for improved light distribution and reduced process complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED chips are used for vehicle lighting, then energy efficiency and service life are improved, but light emission uniformity deteriorates due to large light point size and high intensity at center
Solution Approach 1:
A light guide column is introduced as an intermediary component between the LED chip and the external environment. This light guide column with specific geometric features (truncated cone structure, chamfer, and electroplated areas) redistributes the light from the LED chip, transforming the non-uniform light distribution into uniform 360-degree light emission while preserving the energy efficiency benefits of LED technology.
Solution Approach 2:
The patent changes the geometric parameters of the light guide column, specifically using a truncated cone structure with a chamfer having an included angle of (5°, 6°] and electroplated areas with specific reflectivity characteristics. These parameter changes enable the light guide column to effectively redistribute light rays, converting the inherent non-uniform light distribution of LED chips into uniform light emission patterns.
2Illumination intensity
If light guide column with truncated cone structure is used, then light distribution uniformity is improved, but device complexity increases due to electroplated areas and precise angular requirements
Solution Approach 1:
The patent merges multiple functions into the light guide column: light guidance, light redistribution, and reflective enhancement. By integrating the truncated cone structure, chamfer, and electroplated areas into a single component, the design achieves uniform light distribution without requiring multiple separate optical elements, thereby reducing overall device complexity while maintaining light distribution uniformity.
3Illumination intensity
If chamfer included angle is kept within (5°, 6°], then total reflection is achieved and light emission uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a narrow angular range of (5°, 6°] for the chamfer included angle to ensure optimal total reflection and uniform light distribution. While this requires precise manufacturing, the relatively narrow range simplifies quality control compared to broader specifications, and the electroplated areas provide additional tolerance compensation for minor dimensional variations.
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 solution achieves uniform light emission without dark spots, enhances light distribution efficiency, and reduces the lamp's size and production costs, mimicking the performance of halogen lamps while maintaining the benefits of LED technology.
Implementation Method 1
The provision of the first electroplated area not only ensures the total reflection of the light
Implementation Method 2
after the light is reflected multiple times by the truncated cone structure, the reflection angle gradually decreases
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
An LED vehicle lamp with uniform light emission includes a substrate (5), wherein at least one LED chip (6) is arranged on the substrate (5), a light guide column is arranged on one side of a light emitting surface of the LED chip (6), a surface of one end of the light guide column far away from the LED chip (5) is a recessed conical surface (81), and the recessed conical surface (81) is recessed towards the LED chip (5); one end of the light guide column far away from the LED chip (5) is a first end in a truncated cone shape, only a part of the first end of the light guide column is provided with a first electroplated area, the first electroplated area is arranged close to the LED chip (5), and the recessed conical surface (81) is provided with a second electroplated area.