Color Conversion Occlusion for LED Thermal Management
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Solution Overview
Problem
Existing lighting devices face inefficiencies due to heat exposure affecting wavelength conversion materials, and previous solutions either require excessive coating material or large lenses to achieve effective light conversion and reflection.
Innovation Solution
A light converting device with a conversion material located adjacent to an occlusion within an enclosure, allowing for efficient wavelength conversion and reflection of light away from the heat-generating light source, reducing the amount of conversion material needed and minimizing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conversion material is applied directly to the light source, then the conversion operation is performed close to the source, but the conversion material is exposed to excessive heat resulting in decreased operational efficiency
Solution Approach 1:
The device separates the conversion material from the light source by introducing an intermediate enclosure. The light source remains in its original position while the conversion material is applied to the interior surface of the enclosure, creating distinct functional zones that reduce thermal exposure to the conversion material.
Solution Approach 2:
The enclosure acts as an intermediary element between the light source and the conversion material. It allows the light to travel from the source to the conversion material while maintaining physical separation, thereby reducing heat transfer and protecting the conversion material from excessive thermal exposure.
2Reliability
If the conversion coating is applied to the entire surface of the enclosure, then the light is converted effectively, but copious amounts of conversion coating material are required increasing production cost
Solution Approach 1:
Instead of applying conversion coating to the entire enclosure surface, the invention applies the coating selectively to specific interior surfaces where light conversion is most needed. This localized approach maintains effective light conversion while significantly reducing the quantity of conversion material required.
3Illumination intensity
If a large lens is used to allow light to pass with sufficiently wide projection angle, then the light conversion is effective, but the lens requires large surface area increasing device complexity
Solution Approach 1:
The invention transitions from using a large lens (two-dimensional surface area approach) to applying conversion material on enclosure surfaces (utilizing three-dimensional spatial arrangement). This dimensional shift allows achieving wide projection angles and effective light conversion without requiring a large single surface area, thereby reducing device complexity.
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 enables efficient wavelength conversion and reflection of light with reduced heat exposure, minimizing material usage and production costs while maintaining effective light conversion performance.
Implementation Method 1
A conversion material may be located adjacent to an occlusion within an enclosure to convert light from a source light into light of a different wavelength range
Implementation Method 2
Often, such conversion may be performed by using a luminescent, fluorescent, or phosphorescent material
Implementation Method 3
The occlusion may be at least partially located within the enclosure to receive a source light within a source wavelength range which may be emitted from a light source
Data Source
AI summary
A light converting device is described for receiving source light within a source wavelength range, converting the source light into a converted light, and reflecting the converted light to a desired output direction. The lighting device may use a color conversion occlusion to receive the source light and reflect a converted light in the desired output direction. The converted light may be intermediately reflected by the enclosure, or alternatively passed through the enclosure, as it is directed in the desired output direction.