Transformer and multi-lamp driving circuit using the same
AssigneeDarfon Electronics Corp.
InventorsChing-Fu Hsueh, Cheng-Hsien Chien, Wan-Chin Hsu
Life of this patent
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Abstract
A transformer for driving multiple lamps includes a core, a primary winding set, a secondary winding set and a balancing winding set. The primary winding set winds around the core and includes a first primary coil. The secondary winding set winds around the core and includes a first secondary coil. The balancing winding set winds around the core and includes a first balancing coil and a second balancing coil which wind around the core in a combinative way. The primary winding set, the secondary winding set and the balancing winding set have the same magnetic-flux loop in the core.
Claims25
A transformer for driving a plurality of lamps, the transformer comprising:
- a core;
- a primary winding set, winding set around the core and comprising a first primary coil;
- a secondary winding set, winding set around the core and comprising a first secondary coil;
- and
- a balancing winding set, winding set around the core and comprising a first balancing coil and a second balancing coil winding set around the core in a combinative way, wherein the primary winding set, the secondary winding set and the balancing winding set have the same magnetic-flux loop in the core.
A multi-lamp driving circuit for driving a plurality of lamps, the multi-lamp driving circuit comprising:
- a driving circuit;
- and
- a transformer, comprising:
- a core;
- a primary winding set, winding set around the core and coupled to the driving circuit, the primary winding set comprising a primary coil;
- a secondary winding set, winding set around the core and comprising a first secondary coil;
- and
- a balancing winding set, winding set around the core and comprising a first balancing coil and a second balancing coil winding set around the core in a combinative way, wherein the secondary winding set is coupled to the lamps through the balancing winding set, and the primary winding set, the secondary winding set and the balancing winding set have the same magnetic-flux loop in the core.
A multi-lamp driving circuit for driving a plurality of lamps, the multi-lamp driving circuit comprising:
- a driving circuit;
- and
- a transformer, comprising:
- a core;
- a primary winding set, winding set around the core and coupled to the driving circuit, the primary winding set comprising a primary coil;
- a secondary winding set, winding set around the core and comprising a secondary coil;
- and
- a balancing winding set, winding set around the core and comprising a first balancing coil and a second balancing coil winding set around the core in a combinative way, wherein the secondary winding set is coupled to the lamps and is coupled to the balancing winding set through the lamps, and the primary winding set, the secondary winding set and the balancing winding set have the same magnetic-flux loop in the core.
A multi-lamp driving circuit for driving a first lamp and a second lamp, the multi-lamp driving circuit comprising:
- a driving circuit;
- and
- a transformer, comprising:
- a core;
- a primary winding set, winding set around the core and coupled to the driving circuit, the primary winding set comprising a primary coil;
- a secondary winding set, winding set around the core and comprising a first secondary coil;
- and
- a balancing winding set, winding set around the core and comprising a first balancing coil and a second balancing coil winding set around the core in a combinative way, and a third balancing coil and a fourth balancing coil winding set around the core in a combinative way, wherein two ends of the first lamp are respectively coupled to first ends of the second and third balancing coils, two ends of the second lamp are respectively coupled to first ends of the first and fourth balancing coils, the first and second lamps are coupled to the first secondary coil through the first to fourth balancing coils, and the primary winding set, the secondary winding set and the balancing winding set have the same magnetic-flux loop in the core.
Dependencies are inferred from the claim text.