Transparent Ring LED Assembly Reflectivity
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Solution Overview
Problem
Conventional LEDs face inefficiencies due to heat management issues and light absorption, limiting their brightness and effectiveness in applications like flashlights and general illumination.
Innovation Solution
The use of a substrate with machined cups and a transparent solder mask enhances reflectivity, allowing for better heat dissipation and reduced light absorption, thereby increasing the brightness of LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If higher current is used to increase LED brightness, then illumination intensity is improved, but heat generation increases and efficiency decreases
Solution Approach 1:
The patent extracts the light-emitting function from the heat-generating electrical input by optimizing the LED package structure. The transparent substrate and reflective cups separate the light output path from the heat dissipation path, allowing high current operation while managing thermal effects through structural design rather than direct thermal management.
Solution Approach 2:
The patent transitions from managing heat through thermal conduction alone to a multi-dimensional approach by incorporating optical dimension improvements. The transparent substrate and reflective cup structures create optical pathways that enhance light extraction efficiency, allowing the system to achieve higher effective brightness without proportionally increasing electrical current input, thereby reducing heat generation.
2Loss of energy
If conventional LED structures are used, then manufacturing is simple, but light absorption by package structures reduces efficiency
Solution Approach 1:
The patent changes the optical parameters of the package materials by using a transparent substrate instead of conventional opaque materials. This parameter change transforms the substrate from a light-absorbing element to a light-transmitting element, fundamentally altering the light extraction efficiency without requiring complex multi-layer optical structures.
Solution Approach 2:
The patent converts the previously harmful light absorption by the substrate into a beneficial transparent window that allows light extraction. The substrate that would normally absorb and waste light is transformed into a transparent element that facilitates light output, turning a loss mechanism into an extraction enhancement mechanism.
3Loss of energy
If opaque solder mask is used for substrate protection, then manufacturing is easier, but light reflectivity is reduced and light is wasted
Solution Approach 1:
The patent changes the optical parameter of the solder mask from opaque to transparent. This parameter change allows the solder mask to maintain its protective function while simultaneously serving as an additional light transmission pathway, eliminating the trade-off between protection and optical performance.
4Loss of energy
If multiple nested cups are machined in substrate, then light reflectivity is enhanced and light waste is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent implements nested cups where one cup is formed within another cup in the substrate. This nesting arrangement creates multiple reflective surfaces in a compact vertical space, maximizing light redirection and extraction efficiency without requiring a large lateral footprint or excessively complex manufacturing processes.
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
This approach results in brighter LEDs with improved heat management and reduced light loss, making them suitable for applications such as flashlights and general illumination.
Implementation Method 1
The transparent solder mask can enhance reflectivity of the substrate (or of material formed upon the substrate)
Implementation Method 2
The machined surface can be more reflective than a non-machined surface
Data Source
AI summary
A substrate for an LED assembly can have a plurality of cups formed therein. At least one cup can be formed within another cup. The cups can be co-axial with respect to one another, for example. A machined surface of the substrate can enhance reflectivity of the LED assembly. A transparent and/or non-global solder mask can enhance reflectivity of the LED assembly. A transparent ring can enhance reflectivity of the LED assembly. By enhancing reflectivity of the LED assembly, the brightness of the LED assembly can be increased. Brighter LED assemblies can be used in applications such as flashlights, displays, and general illumination.