Segmented Light Guide for High Intensity Illumination
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Solution Overview
Problem
Existing light emitting devices with large or long light guides face significant light loss due to self-absorption and increased light outcoupling, leading to decreased intensity and scalability.
Innovation Solution
A light emitting device comprising two light guides with angled input and exit surfaces and separate light sources, each converting light to a different spectral distribution, optimized for Total Internal Reflection to minimize light loss and maximize intensity, using materials like transparent and luminescent materials to enhance light guiding and conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light guide is made longer and more LEDs are used to illuminate the luminescent concentrator, then the light output is increased, but light loss increases due to self-absorption and increased light outcoupling, leading to decreased intensity gain
Solution Approach 1:
The light guide is divided into multiple segments or sections, each illuminated by its own dedicated light source. This segmentation allows each section to maintain high light intensity and efficiency while the overall system achieves high total light output through the combination of multiple segments working in parallel.
2Quantity of substance
If the light guide is made longer, then more light can be coupled in, but light loss increases due to self-absorption and increased light outcoupling, leading to decreased scalability
Solution Approach 1:
The light guide is divided into multiple segments or sections, each illuminated by its own dedicated light source. This segmentation allows each section to maintain high light intensity and efficiency while the overall system achieves high total light output through the combination of multiple segments working in parallel.
3Quantity of substance
If the light guide is made longer, then more light can be coupled in, but light loss increases due to self-absorption and increased light outcoupling, leading to decreased intensity gain
Solution Approach 1:
The light guide is divided into multiple segments or sections, each illuminated by its own dedicated light source. This segmentation allows each section to maintain high light intensity and efficiency while the overall system achieves high total light output through the combination of multiple segments working in parallel.
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 significantly reduces light loss and increases the intensity of the emitted light, improving the scalability and brightness of the light emitting device, especially for large or long light guides, while enabling high-quality white light output.
Implementation Method 1
converting at least a part of the light with the first spectral distribution to light with a third spectral distribution
Implementation Method 2
optimized for Total Internal Reflection to minimize light loss and maximize intensity
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5B
AI summary
A light emitting device (1) comprising a first light source (21) and a second light source (22) adapted for, in operation, emitting light (13) with a first spectral distribution and light (14) with a second spectral distribution, respectively, a first light guide (3) and a second light guide (4) comprising a first light input surface (31, 41) and a first light exit surface (32, 42), respectively, the light input surface and the light exit surface of the respective light guide extending at an angle different from zero with respect to each other, the first and second light guide being adapted for receiving the light with the first and second spectral distribution, respectively, at the first and second light input surface, converting at least a part of the received light to light (17) with a third spectral distribution and light (77) with a fourth spectral distribution, respectively, guiding the light to the first and second light exit surface, respectively, and coupling at least a part of the light with the third and fourth spectral distribution out of the first and second light exit surface, respectively, wherein the light (13) having the first spectral distribution and the light (14) having the second spectral distribution have different spectral distributions, and the light (17) having the third spectral distribution and the light (77) having the fourth spectral distribution have different spectral distributions.