Adjustable Lens LED Substrate for Thermal Management
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Solution Overview
Problem
High-power LEDs face challenges in achieving maximum lumen output due to thermal management issues, as they generate more heat than can be efficiently dissipated, leading to reduced optical output, and existing heat sink solutions are costly and inefficient.
Innovation Solution
A lighting system that combines LEDs of different intensities on a single substrate with an adjustable lens to optimize light projection, allowing for selective powering of LED subassemblies and using a thermally conductive binding layer to manage heat, while employing fluorescent binders to enhance light spectrum and a customizable lens for focal lengths to achieve uniform beam distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-power LEDs are used to achieve desired lumen output, then lumen output is improved, but heat dissipation becomes difficult and thermal management issues arise
Solution Approach 1:
The patent divides the lighting system into multiple low-power LED modules instead of using a single high-power LED. Each module operates at lower current levels, generating less heat individually. The modular arrangement allows for distributed heat management and prevents the thermal concentration problems associated with high-power LEDs.
Solution Approach 2:
The patent embeds multiple LED modules within a single encapsulating envelope, creating a nested structure. This allows the modules to be closely spaced while sharing common thermal management resources. The encapsulant acts as both optical diffuser and thermal pathway, efficiently conducting heat away from multiple LED sources simultaneously.
2Illumination intensity
If high-power LEDs are used to increase lumen output, then light output is improved, but power consumption and heat generation increase
Solution Approach 1:
The system uses multiple low-power LED modules in parallel configurations, allowing the total lumen output to be achieved through aggregation of lower-power sources. This segmentation enables more efficient power distribution and reduces the electrical stress and power consumption associated with driving single high-power LEDs at their limits.
3Illumination intensity
If multiple LEDs are used to achieve desired lumen output, then lumen output is improved, but the number of components and device complexity increase
Solution Approach 1:
The patent combines multiple LED modules, their mounting structures, and thermal management features into a single integrated encapsulated unit. This merging approach presents a simplified interface to the external system while containing the complexity of multiple LED components within the unified envelope, reducing the effective component count from the system perspective.
Solution Approach 2:
The encapsulant serves multiple functions simultaneously: it acts as an optical diffuser to distribute light, a thermal conductor to manage heat from multiple LEDs, a structural housing to hold the LED modules, and a protective enclosure. This multi-functionality reduces the need for separate components for each function.
4Temperature
If LEDs are mounted on flat heat conductive substrate, then heat removal is improved, but adequate heat removal remains difficult in various orientations
Solution Approach 1:
The patent incorporates heat dissipation fins or extended thermal pathways directly on the substrate surface in strategic locations. These localized thermal management features create preferential heat escape routes that function effectively regardless of the overall module orientation, addressing the thermal management challenge at the local level rather than relying on global orientation.
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 system achieves increased lumen output and efficient heat management, reducing power consumption and heat dissipation while maintaining a high-intensity light appearance with less thermal stress on LEDs, thus overcoming the limitations of traditional high-power LED designs.
Implementation Method 1
using a thermally conductive binding layer to manage heat
Implementation Method 2
employing fluorescent binders to enhance light spectrum
Implementation Method 3
using a customizable lens for focal lengths to achieve uniform beam distribution
Data Source
AI summary
A lighting device is disclosed having a plurality of light emitting diodes disposed about the same substrate. A lens is configured with a geometry that corresponds to different sections of the substrate containing the light emitting diodes to propagate a beam of light with different characteristics through different portions of the lens.