Planar magnetic headphones
AssigneeSony Interactive Entertainment America LLC
InventorShai Messingher
Life of this patent
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Abstract
Planar magnetic headphones include a single layer of parallel elongated magnets spaced from each other and supported on a magnet holder matrix. The holder matrix can be plastic or it can be a metallic permeability plate, with the magnets being on the inside (toward the ear) of the plate. Inboard of the magnets is a plastic dampening matrix that supports a first continuous disk-shaped dampening membrane. A serpentine circuit trace is established on a thin diaphragm that is outboard of the magnets to excite the magnets and move the diaphragm to produce sound according to the current in the trace. Still further outboard of the circuit race and positioned against a hard plastic outer cover is a second continuous disk-shaped dampening membrane. A circular pattern of holes is formed through the outer cover.
Claims20
Planar magnetic headphone, comprising:
- an outer plastic shell formed with plural through-holes, the outer plastic shell facing away from a wearer of the headphone when the headphone is worn;
- a dampening matrix that supports a first continuous disk-shaped sound dampener that faces a wearer of the headphone when the headphone is worn;
- one and only one layer of elongated magnets co-parallel and co-planar to each other and disposed between the outer plastic shell and the first continuous disk-shaped sound dampener;
- a magnet holder matrix flush against the layer of elongated magnets, the magnet holder matrix comprising cross-elements establishing openings between adjacent cross-elements;
- a sound diaphragm with a serpentine circuit disposed between the magnets and the dampening matrix that supports the first continuous disk-shaped sound dampener such that electricity passing through the circuit cooperates with a magnetic field produced by the magnets to move the diaphragm to produce sound;
- and
- at least a second continuous disk-shaped sound dampener disposed between the magnet holder and the outer shell.
Apparatus, comprising:
- a planar magnetic drive assembly including plural magnets closely juxtaposed with a drive circuit on a diaphragm;
- an outer plastic shell formed with plural through-holes;
- a first continuous disk-shaped sound dampener that faces a wearer of the headphone when the headphone is worn, the planar magnetic drive assembly being disposed between the outer plastic shell and the first continuous disk-shaped driver;
- and
- at least a second continuous disk-shaped sound dampener disposed between the planar magnetic drive assembly and the outer shell.
Assembly comprising:
- a planar magnetic drive assembly including plural magnets closely juxtaposed with a drive circuit on a diaphragm;
- an outer plastic shell formed with plural through-holes and covering the drive assembly;
- and
- plural sound dampeners parallel to the planar magnetic drive assembly.
Dependencies are inferred from the claim text.