Methods and apparatuses for operating groups of high-power leds
AssigneeEldolab Holding B.V.
InventorsMachiel Slot, Antonius Jacobus Maria Cremer
Life of this patent
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Abstract
In energy-efficient, compact and cost-effective solution for driving a number of high-power LED groups for lighting applications includes using a single switching power supply together with LEDs connected in series and/or in parallel and pulse width-controlled switches in parallel across the individually controllable LED groups. If the switch of an LED group is ON, the LED group will not light up. If the switch is in the OFF position, the full current of the power supply will pass through the corresponding LED group.
Claims2
Method of driving, by means of single power supply, a number of high-power light-emitting diodes (LEDs), said number of LEDs being divided into two or more groups, each group being separately energizable, said method comprising:
- a) energizing or de-energizing of a supply current from the power supply into a first one of the groups;
- b) waiting during a predetermined wait time period;
- and
- c) repeating step a) and b) for a second one of the groups.
2-37. (canceled)
Dependencies are inferred from the claim text.