Patent ID: 8963443
Filing Date: 2015-02-24
Classification: H05B

Abstract:
1. A method of driving a light source, the method comprising: providing power to a plurality of light source parts connected in parallel such that levels of current flow through the light source parts; determining that a first light source part has a highest total forward voltage among the plurality of light source parts; selecting a reference current level to be a current level of the first light source part; adjusting the levels of currents flowing through the light source parts to be substantially equal to the reference current level; determining that the first light source part no longer has the highest total forward voltage and that a second light source part has the highest total forward voltage among the plurality of light source parts; and updating the reference current level to be a current level of the second light source part; and re-adjusting the levels of currents flowing through the light source parts to be substantially equal to the updated reference current level.