Self-adaptive heat spreader with a micromesh using LIGA-like technology for AUV LED headlight

S. C. Shen, H. J. Huang, J. C. Hsieh, H. J. Shaw

Research output: Contribution to journalReview article

5 Citations (Scopus)

Abstract

An autonomous underwater vehicle (AUV) is invariably equipped with a self-contained power supply. If the power consumption of the vehicle is lowered, its working time and performance will be enhanced. For the foregoing purpose, the research aims at developing high-brightness LED headlights to replace conventional high-pressure mercury lamps. In the research, high-brightness LEDs often develop hot-spot problems which result in a huge increase of local temperatures and reduces their service life and brightness. Therefore, the paper presents self-adaptive micro heat spreaders to eliminate the problem of high thermal density, approximately 100 W/cm2, and to provide constant high-brightness illumination in agreement with the various undersea positions of the AUV. A composite moisture-retaining structure is fabricated using a LIGA-like process and it is incorporated by the self-adaptive micro heat spreader. The unique structure improves the moisture-retaining efficiency of the micro devices in the heat spreader. As a result, the newly-designed heat spreader maintains the original thermal equilibrium and heat dissipation capabilities, eliminates the effect of gravity on the working fluid, and lifts the restraint imposed on the two-phase heat-dissipation device in the dynamic mechanism. With this feature, the new heat spreader is suitable for LED headlights of AUVs, helping reduce power consumption.

Original languageEnglish
Pages (from-to)137-145
Number of pages9
JournalApplied Ocean Research
Volume32
Issue number2
DOIs
Publication statusPublished - 2010 Apr 1

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Headlights
Spreaders
Autonomous underwater vehicles
Light emitting diodes
Luminance
Heat losses
Electric power utilization
Moisture
Mercury vapor lamps
Hot Temperature
Service life
Gravitation
Lighting
Fluids
Composite materials

All Science Journal Classification (ASJC) codes

  • Ocean Engineering

Cite this

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abstract = "An autonomous underwater vehicle (AUV) is invariably equipped with a self-contained power supply. If the power consumption of the vehicle is lowered, its working time and performance will be enhanced. For the foregoing purpose, the research aims at developing high-brightness LED headlights to replace conventional high-pressure mercury lamps. In the research, high-brightness LEDs often develop hot-spot problems which result in a huge increase of local temperatures and reduces their service life and brightness. Therefore, the paper presents self-adaptive micro heat spreaders to eliminate the problem of high thermal density, approximately 100 W/cm2, and to provide constant high-brightness illumination in agreement with the various undersea positions of the AUV. A composite moisture-retaining structure is fabricated using a LIGA-like process and it is incorporated by the self-adaptive micro heat spreader. The unique structure improves the moisture-retaining efficiency of the micro devices in the heat spreader. As a result, the newly-designed heat spreader maintains the original thermal equilibrium and heat dissipation capabilities, eliminates the effect of gravity on the working fluid, and lifts the restraint imposed on the two-phase heat-dissipation device in the dynamic mechanism. With this feature, the new heat spreader is suitable for LED headlights of AUVs, helping reduce power consumption.",
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Self-adaptive heat spreader with a micromesh using LIGA-like technology for AUV LED headlight. / Shen, S. C.; Huang, H. J.; Hsieh, J. C.; Shaw, H. J.

In: Applied Ocean Research, Vol. 32, No. 2, 01.04.2010, p. 137-145.

Research output: Contribution to journalReview article

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AU - Hsieh, J. C.

AU - Shaw, H. J.

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