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现有LED车灯模块的荧光粉自发热现象严重,且散热条件恶劣,致使荧光粉硅胶温度过高,降低了LED模块的热可靠性。本文提出了一种双层基板LED车灯模块,旨在增加荧光粉硅胶的导热途径,从而降低荧光粉硅胶的温度。针对该结构进行了传热数值模拟,结果发现;与现存的LED车灯模块相比,双层基板LED车灯模块荧光粉硅胶的最高温度降低52.7℃。该模块强化了荧光粉硅胶的散热能力,可有效解决荧光粉自发热问题,并降低芯片结温。
The phosphor of the existing LED lamp module has a serious self-heating phenomenon and has bad heat dissipation conditions, which causes the temperature of the phosphor silica gel to be too high, which reduces the thermal reliability of the LED module. In this paper, a dual-layer LED lamp module is proposed to increase the thermal conductivity of the phosphor silica and thus reduce the temperature of the phosphor silica. The numerical simulation of the heat transfer for the structure shows that the maximum temperature of the phosphor substrate of the double-layer LED lamp module is reduced by 52.7 ° C compared with the existing LED lamp module. This module strengthens the heat dissipation capacity of phosphor silica, which can effectively solve the self-heating problem of phosphor and reduce the chip junction temperature.