RGB-Stack Light Emitting Diode Modules with Transparent Glass Circuit Board and Oil Encapsulation

Autor: Shang-Ping Ying, Si-Yun Jian, Cher Ming Tan, Ying-Chang Li, Yuan-Hsiao Chang, Der-Hwa Yeh, Chao-Sung Lai, Liann-Be Chang, Lee Chow, Yu-Chi Li, Preetpal Singh, Ting-Yu Chao
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Materials, Vol 11, Iss 3, p 365 (2018)
Materials; Volume 11; Issue 3; Pages: 365
Materials
ISSN: 1996-1944
Popis: The light emitting diode (LED) is widely used in modern solid-state lighting applications, and its output efficiency is closely related to the submounts’ material properties. Most submounts used today, such as low-power printed circuit boards (PCBs) or high-power metal core printed circuit boards (MCPCBs), are not transparent and seriously decrease the output light extraction. To meet the requirements of high light output and better color mixing, a three-dimensional (3-D) stacked flip-chip (FC) LED module is proposed and demonstrated. To realize light penetration and mixing, the mentioned 3-D vertically stacking RGB LEDs use transparent glass as FC package submounts called glass circuit boards (GCB). Light emitted from each GCB stacked LEDs passes through each other and thus exhibits good output efficiency and homogeneous light-mixing characteristics. In this work, the parasitic problem of heat accumulation, which caused by the poor thermal conductivity of GCB and leads to a serious decrease in output efficiency, is solved by a proposed transparent cooling oil encapsulation (OCP) method.
Databáze: OpenAIRE
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