Vehicle Light Source With Dual Substrates For Beam Pattern
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Solution Overview
Problem
Aftermarket LED light sources for vehicles fail to accurately replicate the beam pattern of traditional tungsten-halogen bulbs, leading to nuisance glare and reduced photometric efficacy due to differences in light emission windows and thermal management issues.
Innovation Solution
A vehicle light source with two substantially parallel substrates and LEDs coupled to each, allowing light to pass through the opposite substrate, reducing thermal resistance and enabling optical adjustment of the beam pattern to mimic tungsten-halogen bulbs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional tungsten-halogen bulbs are used, then beam pattern accuracy is maintained, but energy efficiency is poor and heat management is difficult
Solution Approach 1:
The invention divides the light source into multiple separate LED elements (first LED, second LED, third LED, fourth LED) positioned at different locations within the bulb housing. Each LED emits light through a different transparent portion of the bulb, collectively replicating the omnidirectional beam pattern of traditional bulbs while maintaining energy efficiency of LED technology
Solution Approach 2:
Different LED elements are positioned to emit light through specific transparent portions of the bulb at different locations. The first and second LEDs emit through first and second transparent portions, while third and fourth LEDs emit through third and fourth transparent portions, creating localized light emission zones that collectively form the complete beam pattern
2Use of energy by moving object
If aftermarket LED light sources are used, then energy efficiency is improved, but beam pattern accuracy deteriorates causing nuisance glare
Solution Approach 1:
The invention uses multiple segmented LED elements positioned at different locations (first, second, third, fourth LEDs) that collectively emit light through different transparent portions of the bulb. This segmentation allows replication of the omnidirectional beam pattern of traditional bulbs, preventing the directional glare issues common in single-LED aftermarket replacements
Solution Approach 2:
The invention merges the output of multiple LED elements (first, second, third, fourth LEDs) to create a combined light emission pattern that replicates the omnidirectional characteristics of traditional tungsten-halogen bulbs. The combined effect of all LEDs working together eliminates the harmful directional glare while maintaining LED energy efficiency
3Device complexity
If single-substrate LED designs are used, then device complexity is reduced, but thermal management becomes inadequate
Solution Approach 1:
The invention divides the thermal management system into separate substrate structures for different LED elements. First and second LEDs are mounted on one substrate while third and fourth LEDs are mounted on another substrate, allowing heat from each LED to be dissipated through its own substrate pathway, improving overall thermal management
Solution Approach 2:
The invention transitions from a single-substrate design to a multi-substrate three-dimensional arrangement where LEDs are distributed across multiple substrates at different spatial locations. This dimensional distribution creates multiple thermal conduction pathways and increases surface area for heat dissipation, effectively managing thermal load
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 provides improved brightness, reliability, and customization by replicating the beam pattern of traditional tungsten-halogen bulbs while reducing nuisance glare and enhancing luminous efficacy through efficient heat distribution and adjustable beam patterns.
Implementation Method 1
The first LED is coupled to a surface of the first substrate that faces the second substrate. The first LED is configured to emit light through the second substrate.
Implementation Method 2
The first LED is configured to emit light through the second substrate. The second LED is coupled to a surface of the second substrate that faces the first substrate. The second LED is configured to emit light through the first substrate.
Implementation Method 3
The second substrate is spaced apart from the first substrate. The first LED is coupled to a surface of the first substrate that faces the second substrate.
Data Source
AI summary
A light source for a vehicle includes a first substrate, a second substrate, a first light emitting element, and a second light emitting element. The second substrate is spaced apart from the first substrate. The first light emitting element is coupled to a surface of the first substrate that faces the second substrate. The first light emitting element is configured to emit light through the second substrate. The second light emitting element is coupled to a surface of the second substrate that faces the first substrate. The second light emitting element is configured to emit light through the first substrate.