LED TESTING METHOD Russian patent published in 2017 - IPC G01R31/26 

FIELD: electricity.

SUBSTANCE: in the LED testing method, including passing through the LED step-changing electric current, measuring the temperature-sensitive parameter, characterizing the LED temperature change under the effect of step-changing electric current, the determination of the thermal resistance of the LED by processing the measured values of temperature-sensitive parameter, at that based on the value of the LED heat resistance, estimate if there is any defect in the LED, determine the first and the second values of the LED thermal resistance according to the invention, at two values of the step-changing electric current passed through the LED, having relatively small and relatively large value, according to the difference of the first and the second heat resistances estimate if there is any defect in the LED. In the case when the value of the indicated difference exceeds the specified value, the conclusion about the defect in LED is to be made.

EFFECT: increase of testing method sensitivity and decrease of the time spent on testing.

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