US 10,652,981 B1Granted

Method for driving a plurality of light emitting diodes and drive circuit

AssigneeInfineon Technologies AG

InventorsAdolfo De Cicco, Rosario Chiodo, Davide Ghedin, Andrea Scenini

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Abstract

A method may include, based on a plurality of duty cycles each associated with a respective one of a plurality of LEDs, determining a first set of drive schemes such that each drive scheme is associated with a respective one of the plurality of LEDs and is dependent on the duty cycle associated with the respective one of the plurality of LEDs. The method further includes driving each of the plurality of LEDs in accordance with the associated drive scheme of the first set in at least one drive cycle. Each of the plurality of drive schemes includes one or more on-times each having a phase and a duration. The method may include driving each of the plurality of LEDs in an on-state or an off-state dependent on the respective drive scheme and determining the drive scheme dependent on the drive scheme of another one of the plurality of LEDs.

Claims16

Dependent claims

A method, comprising:

based on a plurality of duty cycles each associated with a respective one of a plurality of light emitting diodes (LEDs), determining a first set of drive schemes such that each drive scheme is associated with a respective one of the plurality of LEDs and is dependent on the duty cycle associated with the respective one of the plurality of LEDs;
and
in at least one drive cycle, driving each of the plurality of LEDs in accordance with the associated drive scheme of the first set,
wherein each of the plurality of drive schemes includes one or more on-times each having a phase and a duration,
wherein driving each of the plurality of LEDs in accordance with the associated drive scheme comprises driving each of the plurality of LEDs in an on-state or an off-state dependent on the respective drive scheme, and
wherein determining the drive scheme of at least one of the plurality of LEDs comprises determining the drive scheme dependent on the drive scheme of another one of the plurality of LEDs.

3 more elements

A drive circuit, wherein the drive circuit is configured:

based on a plurality of duty cycles each associated with a respective one of a plurality of light emitting diodes (LEDs), to determine a first set of drive schemes such that each drive scheme is associated with a respective one of the plurality of LEDs and is dependent on the duty cycle associated with the respective one of the plurality of LEDs;
and
in at least one of a plurality of drive cycles, to drive each of the plurality of LEDs in accordance with the associated drive scheme of the first set,
wherein each of the plurality of drive schemes includes one or more on-times each having a phase and a duration,
wherein driving each of the plurality of LEDs in accordance with the associated drive scheme comprises driving each of the plurality of LEDs in an on-state or an off-state dependent on the respective drive scheme, and
wherein determining the drive scheme of at least one of the plurality of LEDs comprises determining the drive scheme dependent on the drive scheme of another one of the plurality of LEDs.

3 more elements

Dependencies are inferred from the claim text.