Laser Pumped Lamp with Transparent Holder for Heat Dissipation
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Solution Overview
Problem
High-power laser applications face challenges in maintaining optical performance due to thermal issues, such as localized heat dissipation in fluorescent materials, which limits brightness and efficiency.
Innovation Solution
A laser pumped lamp design featuring a transparent holder with high thermal conductivity (>10W/mK) that encases the fluorescent body, allowing for improved heat transport and attachment to the hotspot, combined with a heat-spreader for efficient heat dissipation, and a focusing unit for optimal optical radiation transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a laser is used to pump fluorescent material for high brightness output, then the optical performance and brightness are improved, but localized heat dissipation occurs in the fluorescent material which limits the brightness and efficiency
Solution Approach 1:
The patent extracts the fluorescent material from direct contact with the laser pump source and places it in a separate holder positioned away from the laser. This spatial separation removes the heat-generating fluorescent material from the high-intensity laser field while still allowing optical coupling, thereby reducing localized heat accumulation in the fluorescent material while maintaining brightness output.
Solution Approach 2:
The patent introduces a transparent holder as an intermediary component between the laser pump source and the fluorescent material. This holder serves as a thermal management interface that allows optical radiation to pass through to excite the fluorescent material while providing a pathway for heat dissipation, thus mediating between the high brightness requirement and the heat management challenge.
2Use of energy by moving object
If the fluorescent body is positioned close to the laser source for efficient energy transfer, then the optical efficiency is improved, but heat accumulation in the fluorescent body increases
Solution Approach 1:
The fluorescent body is extracted from immediate proximity to the laser source and repositioned in a holder that is spatially separated from the laser. This extraction maintains efficient optical energy transfer through the transparent holder while removing the fluorescent body from the most intense heat zone, thereby reducing heat accumulation while preserving optical efficiency.
Solution Approach 2:
The patent changes the spatial arrangement by positioning the holder and fluorescent body away from the laser source in a different spatial configuration. The holder is arranged such that it transmits optical radiation effectively while providing thermal management, thus solving the contradiction by optimizing the geometric relationship between components rather than simply increasing proximity.
3Temperature
If a transparent holder with high thermal conductivity is used to manage heat, then heat transport is improved, but the device complexity increases
Solution Approach 1:
The transparent holder serves multiple functions simultaneously: it acts as a mechanical support structure for the fluorescent material, provides a pathway for optical radiation transmission from the laser to the fluorescent body, and functions as a thermal management component due to its high thermal conductivity. This multi-functionality reduces the need for separate heat sink components, thereby managing heat effectively while minimizing the increase in device complexity.
Solution Approach 2:
The patent merges the structural support function and the thermal management function into a single transparent holder component. By combining these functions into one element with high thermal conductivity, the design achieves effective heat transport without adding multiple separate components, thus managing heat while keeping the device complexity relatively low.
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 enhances optical performance by effectively managing heat accumulation, maintaining high brightness and efficiency, and enabling dynamic beam shaping for various lighting applications, including automotive front lights.
Implementation Method 1
the transparent holder has a thermal conductivity that is equal to or larger than 10W/mK
Implementation Method 2
a fluorescent body having a shape that is elongated in a predetermined direction
Data Source
Figure 1~2
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Figure 5~6
AI summary
The invention relates to a lamp and a method, preferably adapted for generating high power in laser applications. The lamp (1) comprises a source (3) adapted for emitting optical radiation along an optical path and a holder (5) comprising a fluorescent body (4), wherein the holder (5) is arranged in the optical path, a collecting unit (8) is provided which is adapted for transmitting at least a portion of optical radiation emitted by the fluorescent body (4) to an output of the lamp (1), and the fluorescent body (4) comprises a shape being elongated in a predetermined direction. In this way, a small spot and little divergence is provided in conjunction with good heat dissipation leading to a high optical performance.