Closed-Loop Slit Heatsink for Stable Cylindrical Phosphor Pumping
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Solution Overview
Problem
Existing high-intensity lighting systems face issues with heat management and temperature-dependent intensity fluctuations, leading to reliability and spectral instability, especially when using high-power densities.
Innovation Solution
A light generating system comprising a first light generating device, a luminescent body, and thermally conductive bodies with a slit-like opening for efficient heat dissipation and controlled light incoupling, using a luminescent material to convert light and maintain spectral stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-power density pumping is used to achieve high intensity light output, then illumination intensity is improved, but temperature increases causing spectral instability and reliability degradation
Solution Approach 1:
The patent employs a liquid cooling system where a coolant flows through channels in thermal contact with the phosphor body. This hydraulic cooling mechanism efficiently removes heat from the high-power density pumping process, maintaining thermal stability while enabling high intensity light output without spectral degradation or reliability loss.
2Illumination intensity
If high-power density pumping is applied to increase brightness, then illumination intensity is improved, but spectral stability deteriorates due to temperature-dependent intensity variations
Solution Approach 1:
The liquid cooling system maintains the phosphor body at a stable temperature by continuously removing heat generated during high-power density pumping. This thermal stabilization prevents temperature-dependent intensity variations in the luminescent material, ensuring spectral stability is preserved even at high brightness levels.
3Device complexity
If conventional heat management is used with high-power LEDs, then device complexity is reduced, but reliability decreases due to poor thermal management
Solution Approach 1:
The patent implements a liquid cooling system with coolant channels in direct thermal contact with the phosphor body and light-generating device. This active thermal management approach, while adding some structural elements, provides superior heat removal compared to passive conventional methods, significantly improving system reliability under high-power operation.
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 provides high-intensity, spectrally stable light with improved reliability and controlled color characteristics, utilizing simple components for efficient thermal management.
Implementation Method 1
The luminescent body comprises a luminescent material configured to convert at least part of the first device light into luminescent material light
Implementation Method 2
The one or more thermally conductive bodies comprise: a first thermally conductive body part, in thermal contact with at least part of the first face
Data Source
Figure 1
Figure 2A~2B
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AI summary
The invention provides light generating system (1000) comprising a first light generating device (110), a luminescent body (200), one or more thermally conductive bodies (510), and one or more optical elements (400); wherein: (A) the first light generating device (110) is configured to generate first device light (111), wherein the first light generating device (110) comprises a first light source (10) selected from the group of a superluminescent diode and a laser; (B) the luminescent body (200) comprises a luminescent material (210) configured to convert at least part of the first device light (111) into luminescent material light (211); wherein the luminescent body (200) comprises a first face (201), a second face (202), and a bridging face (203) bridging the first face (201) and the second face (202); wherein the second face (202) has an second face equivalent circular diameter D2, wherein the bridging face (203) has a first height (H1), wherein H1/D2<1, and a perimeter (P); (C) the one or more thermally conductive bodies (510) comprise: (C1) a first thermally conductive body part (511), in thermal contact with at least part of the first face (201); and (C2) a second thermally conductive body part (512), in thermal contact with one or more of (i) part of the bridging face (203) and (ii) part of the second face (202); (D) the first thermally conductive body part (511) and the second thermally conductive body part (512) define a slit-like opening (520) along at least part of the perimeter (P) of the bridging face (203); and (E) the first light generating device (110) and the one or more optical elements (400) are configured to provide the first device light (111) via the slit-like opening (520) to the luminescent body (200).