TY - JOUR
AU - Xu, Jian
AB - Abstract Junction temperature of alternating current light-emitting-diode (AC-LED) has a significant effect on its stable light output and lifetime. The threshold voltage measurement is employed to characterize the junction temperature of AC-LED, due to its excellent merits in high efficiency and accuracy. The threshold voltage is measured when the driving current of an AC-LED rises to a reference on-set value from the zero-crossing node. Based on multiple measurements of threshold voltage at different temperatures, a linear relationship was uncovered between the threshold voltage and the junction temperature of AC-LED with the correlating factor of temperature sensitive parameter (TSP). Thereby, we can calculate the junction temperature with the TSP and threshold voltage once the AC-LED stays at thermal equilibrium state. The accuracy of the proposed junction temperature measurement technique was found to be ±3.2°C for the reference current of 1 mA. It is concluded that the method of threshold voltage is accurate and simple to implement, making it highly suitable for measuring the junction temperature of AC-LED in industry.
TI - Junction temperature measurement of alternating current light-emitting-diode by threshold voltage method
JF - "Frontiers of Optoelectronics"
DO - 10.1007/s12200-015-0533-8
DA - 2016-12-01
UR - https://www.deepdyve.com/lp/springer-journals/junction-temperature-measurement-of-alternating-current-light-emitting-XSIBsGucWG
SP - 555
EP - 559
VL - 9
IS - 4
DP - DeepDyve
ER -