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提出了一种自散热片式LED-COB光源结构。将LED芯片放置在6061铝合金基板侧面,该侧面加工有光学反光槽。整个基板既作为LED芯片的支架,又作为散热片。LED芯片与外界环境之间只有固晶胶一层热阻,大大提高了LED散热系统的散热效率。所设计的COB光源的功率为1~2 W、散热面积为30 cm2、质量为1.9 g。经过测试,在环境温度为25℃、功率1.92 W、发光面处于顶部的竖直放置的条件下,红外热像仪测得散热片上的最高温度为66.2℃,通过正向电压法测得LED芯片的结温为72.4℃。自散热片式COB-LED光源不仅能提高LED灯具的散热性能,同时还能降低LED灯具的系统成本。
A self-radiating chip LED-COB light source structure is proposed. The LED chip is placed on the side of the 6061 aluminum alloy substrate, which is machined with an optical reflector. The entire substrate both as a LED chip holder, but also as a heat sink. LED chip and the external environment only a layer of crystalline adhesive thermal resistance, greatly improving the cooling efficiency of the LED cooling system. The designed COB light source has a power of 1 ~ 2 W, a heat dissipation area of 30 cm2 and a mass of 1.9 g. After testing, the ambient temperature is 25 ℃, the power of 1.92 W, the light-emitting surface is placed in the top of the vertical conditions, the thermal imaging camera measured the maximum temperature of the heat sink was 66.2 ℃, measured by forward voltage LED chip The junction temperature is 72.4 ° C. Self-radiating COB-LED light source can not only improve the heat dissipation performance of LED lamps, but also reduce the system cost of LED lamps.