Method and circuit arrangement for driving light-emitting diodes
AssigneeInfineon Technologies AG
InventorsEmanuele Bodano, Michael Lenz
Life of this patent
Estimating the term…
Abstract
A circuit arrangement includes a first switch device and at least a second switch device. The first switch device is operably coupled to alternately switch on and off a first operating current to a first light-emitting diode arrangement such that the first light-emitting diode arrangement has a first brightness. The second switch device is operably coupled to alternately switch on and off a second operating current to a second light-emitting diode arrangement such that the second light-emitting diode arrangement has a second brightness. The circuit arrangement further includes a logic device configured to control the first and second switch devices that the first and second switch devices do not both switch on simultaneously.
Claims21
A circuit arrangement, comprising:
- a first switch device operably coupled to alternately switch on and off a first operating current to a first light-emitting diode arrangement such that the first light-emitting diode arrangement has a first brightness,
- at least a second switch device operably coupled to alternately switch on and off a second operating current to at least a second light-emitting diode arrangement such that the second light-emitting diode arrangement has a second brightness,
- a logic device configured to control the first and second switch devices that the first and second switch devices do not both switch on simultaneously.
A method for operating a first light-emitting diode arrangement and at least a second light-emitting diode arrangement, comprising:
- a) alternately switching on and off a first operating current for the first light-emitting diode arrangement such that the first light-emitting diode arrangement has a first predetermined brightness, and
- b) alternately switching on and off a second operating current for the second light-emitting diode arrangement such that the second light-emitting diode arrangement has a second predetermined brightness, wherein at least the first and the second light-emitting diode arrangements are not switched on simultaneously.
A circuit arrangement, comprising:
- a first switch device operably coupled to alternately switch on and off a first operating current to the first light-emitting diode arrangement such that the first light-emitting diode arrangement has a first predetermined brightness,
- at least a second switch device operably coupled to alternately switch on and off a second operating current to the second light-emitting diode arrangement such that the second light-emitting diode arrangement has a second predetermined brightness, and
- a logic device configured to control the first and second switch devices that the first and second switch devices do not both switch on simultaneously.
Dependencies are inferred from the claim text.