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US 9,313,846 B2Granted
Driver for two or more parallel LED light strings
AssigneeCity University of Hong Kong
InventorsWu Chen, Shu Yuen Ron Hui
Life of this patent
Estimating the term…
Abstract
An LED driver for a plurality of LED light strings has a common node and a plurality of driver output nodes for connection of a plurality of LED light strings. A master power circuit is provided and has a master output connected with the common node. A plurality of slave power circuits are provided which each have a slave output connected with a respective one of the driver output nodes.
Claims13
A LED driver for driving a plurality of parallel LED light strings, comprising:
- a common master power converter;
- and
- a plurality of parallel cascaded slave power converters each electrically connected between the common master power converter and a respective one of the plurality of parallel LED light strings;
- wherein, in use, the common master power converter is arranged to provide a major part of a driver voltage for each of the plurality of parallel LED light strings, and each of the plurality of slave power converters are arranged to provide a residue balancing voltage to the respective LED light string;
- and
- wherein the plurality of slave power converters are arranged to regulate the residue balancing voltage so as to balance currents in the plurality of parallel LED light strings.
3 more elements
A LED driver for driving a plurality of parallel LED light strings, comprising:
- a common master power converter;
- and
- a plurality of parallel cascaded slave power converters each electrically connected between the common master power converter and a respective one of the plurality of LED light strings;
- wherein, in use, the common master power converter is arranged to provide all of a voltage for one of the plurality of parallel LED light strings, and to provide a major part of a driver voltage for each of the remaining plurality of parallel LED light strings, and each of the plurality of slave power converters is arranged to provide a residue balancing voltage to the respective LED light string;
- and
- wherein the plurality of slave power converters are arranged to regulate the residue balancing voltage so as to balance currents in the plurality of parallel LED light strings.
3 more elements
Dependencies are inferred from the claim text.