Light-emitting diode (LED) lamps with different color temperatures have been widely used for various applications. Compared with LED filaments having formal vertical structures, flip-chip LED filaments have a simple structure, better heat dissipation effects, and can be formed into various shapes. In this regard, to investigate the difference in the reliability of flip-chip LED filaments with different color temperatures, this study designed and conducted three aging tests (a xenon lamp aging test, a high temperature–high humidity test, and a thermal cycling test) to simulate the application of the filaments in three outdoor environments. The luminous efficacy, CIE chromaticity coordinates, color temperature, and other indicators of the filaments were obtained before and after aging. The results showed that the high temperature–high humidity environment had the greatest impact on the filament. Particularly, the filaments with color temperatures of 4000 K and 5000 K experienced significant changes under various indicators, confirming their sensitivity to this environment. Meanwhile, the filament with a color temperature of 2700 K exhibited the best reliability. After three kinds of aging tests, the luminous efficacy of the 2700 K filaments decreased by 1.9%, 15.15%, and 0.3%, respectively, with minimal changes in various indicators, indicating their suitability for a wide range of applications.

具有不同色温的发光二极管 (LED) 灯已广泛用于各种应用。倒装芯片LED灯丝与具有形式垂直结构的LED灯丝相比，结构简单，散热效果更好，可以做成各种形状。对此，为研究不同色温倒装LED灯丝可靠性的差异，本研究设计并进行了3项老化试验（氙灯老化试验、高温高湿试验和热循环试验）。 ) 模拟灯丝在三种室外环境中的应用。得到灯丝老化前后的光效、CIE色度坐标、色温等指标。结果表明，高温高湿环境对灯丝的影响最大。特别是色温为4000 K和5000 K的灯丝在各种指标下发生了显着变化，证实了它们对这种环境的敏感性。同时，色温为 2700 K 的灯丝表现出最佳的可靠性。经过三种老化测试，2700 K灯丝的光效分别下降了1.9%、15.15%和0.3%，各项指标变化极小，适用范围广泛。色温为 2700 K 的灯丝表现出最佳的可靠性。经过三种老化测试，2700 K灯丝的光效分别下降了1.9%、15.15%和0.3%，各项指标变化极小，适用范围广泛。色温为 2700 K 的灯丝表现出最佳的可靠性。经过三种老化测试，2700 K灯丝的光效分别下降了1.9%、15.15%和0.3%，各项指标变化极小，适用范围广泛。