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US 2017/0013684 A1Published application
Lighting device and lighting fixture
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsHiroyuki ASANO, Masato HIMEDA, Masafumi YAMAMOTO
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Abstract
The lighting device includes a converter circuit including a switching device, a first inductor, and a second inductor. The first inductor and the second inductor have winding directions such that a magnetic field of the first inductor and a magnetic field of the second inductor have a canceling effect on each other. The switching device is mounted on the substrate so as to be present between the first inductor and the second inductor.
Claims8
A lighting device comprising:
- a converter circuit including at least a switching device, a first inductor, and a second inductor;
- and
- a substrate on which at least the switching device, the first inductor, and the second inductor are mounted,
- the converter circuit being configured to, when the switching device is turned on, allow a first current to flow through the switching device by way of the first inductor and allow a second current to flow through the switching device by way of the second inductor in a direction same as a direction of the first current,
- the first inductor including a first coil,
- the second inductor including a second coil,
- the first inductor and the second inductor being mounted on the substrate and arranged side by side along an arrangement direction so as to cause interaction between a first magnetic field produced by the first current flowing through the first inductor and a second magnetic field produced by the second current flowing through the second inductor,
- the first coil of the first inductor and the second coil of the second inductor having winding directions such that the first magnetic field and the second magnetic field have a cancelling effect on each other, and
- the switching device being mounted on the substrate so as to be present between the first inductor and the second inductor along the arrangement direction.
6 more elements
A lighting device comprising:
- a converter circuit including at least a switching device, a first inductor including a first coil, and a second inductor including a second coil;
- a substrate on which at least the switching device, the first inductor, and the second inductor are mounted;
- a pair of first coil terminals individually electrically connected to opposite ends of the first coil of the first inductor;
- and
- a pair of second coil terminals individually electrically connected to opposite ends of the second coil of the second inductor,
- the converter circuit being configured to, when the switching device is turned on, allow a first current to flow through the switching device by way of the first inductor and allow a second current to flow through the switching device by way of the second inductor in a direction same as a direction of the first current,
- the first inductor and the second inductor being mounted on the substrate and arranged side by side along an arrangement direction so as to cause interaction between a first magnetic field produced by the first current flowing through the first inductor and a second magnetic field produced by the second current flowing through the second inductor,
- the first coil of the first inductor and the second coil of the second inductor having winding directions such that the first magnetic field and the second magnetic field have a cancelling effect on each other, and
- the pair of first coil terminals and the pair of second coil terminals being mounted on a same edge of the substrate in a direction perpendicular to the arrangement direction.
6 more elements
A lighting device comprising:
- a converter circuit including at least a switching device, a first inductor, and a second inductor;
- and
- a substrate on which at least the switching device, the first inductor, and the second inductor are mounted,
- the converter circuit being configured to, when the switching device is turned on, allow a first current to flow through the switching device by way of the first inductor and allow a second current to flow through the switching device by way of the second inductor in a direction same as a direction of the first current,
- the first inductor including a first coil,
- the second inductor including a second coil,
- the first inductor and the second inductor being mounted on the substrate and arranged side by side along an arrangement direction so as to cause interaction between a first magnetic field produced by the first current flowing through the first inductor and a second magnetic field produced by the second current flowing through the second inductor,
- the first coil of the first inductor and the second coil of the second inductor having winding directions such that the first magnetic field and the second magnetic field have a canceling effect on each other,
- the lighting device satisfying relations of L3<L1 and L3<L2,
- L1 representing an external dimension of the first inductor in the arrangement direction,
- L2 representing an external dimension of the second inductor in the arrangement direction, and
- L3 representing an interval between the first inductor and the second inductor in the arrangement direction.
9 more elements
Dependencies are inferred from the claim text.