| 摘要 |
A method of determining the ageing characteristics of an LED comprises applying a current stress pulse to the LED. The LED is monitored to determine when the thermal heating induced by the current stress pulse has been dissipated to a desired level. The operational characteristics of the LED are then measured before applying the next stressing pulse. This method accelerates the effect of aging in a reproducible way and therefore is able to greatly reduce the time needed for a reliability test.
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