Abstract: In one example, a method includes generating, by one or more active circuit elements of a power converter and during a charging state, a first DC power signal from an input power signal; outputting, during the charging state, the first DC power signal to a battery; receiving, during a discharging state, a second DC power signal from the battery; generating, by the same one or more active circuit elements of the power converter and during the discharging state, an AC power signal from the second DC power signal; and outputting, during the discharging state, the AC power signal to a load.

Abstract: A driving method for improving luminous efficacy of a light emitting diode (LED), the method comprising: periodically switching a DC current supplied to the LED between a high current level lH and a low current level lL, the low current level lL being fixed at zero or raised above zero to produce a DC offset; and maintaining an average current at a first value If by adjusting the duty cycle acting on the high current level lH and any one from the grouping consisting of: adjusting the high current level lH and adjusting the low current level lL, and adjusting the high current level lH or adjusting the low current level lL.

Abstract: A driving method for improving luminous efficacy of a light emitting diode (LED), the method comprising: periodically switching a DC current supplied to the LED between a high current level lH and a low current level lL, the low current level lL being fixed at zero or raised above zero to produce a DC offset; and maintaining an average current at a first value If by adjusting the duty cycle acting on the high current level lH and any one from the grouping consisting of: adjusting the high current level lH and adjusting the low current level lL, and adjusting the high current level lH or adjusting the low current level lL.