Abstract: A mobile device includes a housing, a first radiation element, a second radiation element, a third radiation element, a first switch element, and a second switch element. The first radiation element has a first feeding point. The second radiation element has a second feeding point. The first radiation element, the second radiation element, and the third radiation element are distributed over the housing. The first switch element is closed or open, so as to selectively couple the first radiation element to the third radiation element. The second switch element is closed or open, so as to selectively couple the second radiation element to the third radiation element. An antenna structure is formed by the first radiation element, the second radiation element, and the third radiation element.

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.

Abstract: A transformer for driving multi-lamps and a backlight module thereof are provided. The transformer comprises a primary winding, a secondary winding, a core, a first bobbin and a second bobbin. The primary winding comprises a primary coil. The secondary winding comprises a secondary coil and a plurality of auxiliary coils whose turns are substantially equal. The core has a first side and a second side. The first bobbin and the second bobbin are respectively disposed on the first side and the second side for winding around the primary coil, the secondary coil and the auxiliary coils.

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.

Abstract: A power supply circuit for a first and a second lamps and the transformer thereof is provided. The power supply circuit comprises a driving circuit and a transformer. The transformer includes a magnetic core, a primary coil set, a secondary coil, a first coil and a second coil. The driving circuit provides an alternative voltage. The primary coil set is wound on the magnetic core, along with the secondary coil, the first and the second coils, and receives the alternative voltage. The turns of the first coil and the second coil are substantially the same. The first lamp is coupled between the first coil and the secondary coil, and the second lamp is coupled between the second coil and the secondary coil.

Abstract: A transformer for driving multi-lamps and a backlight module thereof are provided. The transformer comprises a primary winding, a secondary winding, a core, a first bobbin and a second bobbin. The primary winding comprises a primary coil. The secondary winding comprises a secondary coil and a plurality of auxiliary coils whose turns are substantially equal. The core has a first side and a second side. The first bobbin and the second bobbin are respectively disposed on the first side and the second side for winding around the primary coil, the secondary coil and the auxiliary coils.

Abstract: A power supply circuit for a first and a second lamps and the transformer thereof is provided. The power supply circuit comprises a driving circuit and a transformer. The transformer includes a magnetic core, a primary coil set, a secondary coil, a first coil and a second coil. The driving circuit provides an alternative voltage. The primary coil set is wound on the magnetic core, along with the secondary coil, the first and the second coils, and receives the alternative voltage. The turns of the first coil and the second coil are substantially the same. The first lamp is coupled between the first coil and the secondary coil, and the second lamp is coupled between the second coil and the secondary coil.

Abstract: A power supply circuit for a first and a second lamps and the transformer thereof is provided. The power supply circuit comprises a driving circuit and a transformer. The transformer includes a magnetic core, a primary coil set, a secondary coil, a first coil and a second coil. The driving circuit provides an alternative voltage. The primary coil set is wound on the magnetic core, along with the secondary coil, the first and the second coils, and receives the alternative voltage. The turns of the first coil and the second coil are substantially the same. The first lamp is coupled between the first coil and the secondary coil, and the second lamp is coupled between the second coil and the secondary coil.

Abstract: A multi-lamp driver driving first and second lamps and comprising a driving circuit and a transformer. The transformer comprises a winding rack, a magnetic core, two primary winding sets, and two secondary winding sets. One portion of the magnetic core is inserted into the winding rack. The two primary winding sets are wound around the winding rack and receive low-voltage signals from the driving circuit. The two secondary winding sets are wound around the winding rack, and two high-voltage signals are induced to respectively drive the first and second lamps. The primary winding sets have substantially the same number of windings, and the secondary winding sets have substantially the same number of windings.

Abstract: A power supply circuit for a first and a second lamps and the transformer thereof is provided. The power supply circuit comprises a driving circuit and a transformer. The transformer includes a magnetic core, a primary coil set, a secondary coil, a first coil and a second coil. The driving circuit provides an alternative voltage. The primary coil set is wound on the magnetic core, along with the secondary coil, the first and the second coils, and receives the alternative voltage. The turns of the first coil and the second coil are substantially the same. The first lamp is coupled between the first coil and the secondary coil, and the second lamp is coupled between the second coil and the secondary coil.

Abstract: A transformer for a lamp system. A first spindle comprises a first hollow portion. A second spindle comprises a second hollow portion and is arranged in parallel with the first spindle. A first coil is wound around the first spindle. Second coils are wound around the second spindle. The number of second coils is even. Windings of the second coils are approximately equal. The core module is disposed in the first and second hollow portions.

Abstract: A multi-lamp backlight system. The system includes a core, a first coil set wrapped around the core, to which a first AC voltage is applied, a second and third coil sets wrapped around the core and respectively disposed on two sides of the first coil set, on which a second and third AC voltage are induced by the first voltage signal applied to the first coil set respectively, wherein the numbers of coils of the second and third coil sets are substantially the same, and first and second lamps are supplied with power by the second and third AC voltages respectively.

Abstract: A multi-lamp backlight system. The system comprises a core, a first coil set wrapped around the core, to which a first AC voltage is applied, a second and third coil sets wrapped around the core and respectively disposed on two sides of the first coil set, on which a second and third AC voltage are induced by the first voltage signal applied to the first coil set respectively, wherein the numbers of coils of the second and third coil sets are substantially the same, and first and second lamps are supplied with power by the second and third AC voltages respectively.

Abstract: A transformer for a lamp system. A first spindle comprises a first hollow portion. A second spindle comprises a second hollow portion and is arranged in parallel with the first spindle. A first coil is wound around the first spindle. Second coils are wound around the second spindle. The number of second coils is even. windings of the second coils are approximately equal. The core module is disposed in the first and second hollow portions.

Abstract: A multi-lamp backlight system. The system comprises a core, a first coil set wrapped around the core, to which a first AC voltage is applied, a second and third coil sets wrapped around the core and respectively disposed on two sides of the first coil set, on which a second and third AC voltage are induced by the first voltage signal applied to the first coil set respectively, wherein the numbers of coils of the second and third coil sets are substantially the same, and first and second lamps are supplied with power by the second and third AC voltages respectively.

Abstract: A bobbin of a transformer includes a hollow sleeve, a first pin set, a partition, and a second pin set. The hollow sleeve is a hollow polyhedron, and the hollow sleeve is wrapped around by a number of the copper coils. A winding-started point is near the corner of the hollow sleeve. The pin set includes a first pin and a first griding slot, wherein the first pin is for being wrapped around by a starting point of the first copper wire, and the first griding slot is for placing the copper wire segment from the starting point to the winding-started point. The partition is for connecting the hollow sleeve and the first pin set. The corner of the hollow sleeve is an intersection point of a top plane the hollow sleeve, a side plane of the hollow sleeve, and the partition. The transformer bobbin of the invention can prevent the short circuit and raise the yield of the transformer.

Abstract: A bobbin of a transformer includes a hollow sleeve, a first pin set, a partition, and a second pin set. The hollow sleeve is a hollow polyhedron, and the hollow sleeve is wrapped around by a number of the copper coils. A winding-started point is near the corner of the hollow sleeve. The pin set includes a first pin and a first griding slot, wherein the first pin is for being wrapped around by a starting point of the first copper wire, and the first griding slot is for placing the copper wire segment from the starting point to the winding-started point. The partition is for connecting the hollow sleeve and the first pin set. The comer of the hollow sleeve is an intersection point of a top plane the hollow sleeve, a side plane of the hollow sleeve, and the partition. The transformer bobbin of the invention can prevent the short circuit and raise the yield of the transformer.