Flat loudspeaker structure
AssigneeIndustrial Technology Research Institute
InventorsChang-Ho Liou, Ming-Daw Chen, Kuo-Hua Tseng
Life of this patent
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Abstract
A flat loudspeaker structure is provided. A conductive electrode of a vibrating membrane of a flat speaker unit is disposed on both utmost sides of the flat speaker unit, so as to improve reliability of the flat speaker unit. The utmost conductive electrodes of the flat speaker unit are further grounded to achieve the EMI preventing function and/or thereby prevent a user from a risk of contacting high voltages. The flat speaker unit at least includes a pair of vibrating membranes each having the conductive electrode, a plurality of supporting members, a perforated electrode structure with a plurality of holes, and an insulator layer.
Claims29
A flat loudspeaker comprising a plurality of stacked flat speaker units each comprising:
- a perforated electrode structure having a plurality of holes;
- a vibrating membrane structure, each of the vibrating membrane structures comprises a vibrating membrane and a conductive electrode stacked together;
- and
- a supporting layer disposed between the vibrating membrane structure and the perforated electrode structure, the supporting layer having a plurality of supporting members, wherein the vibrating membrane structure, the supporting layer, and the perforated electrode structure are sequentially stacked to form the flat speaker unit, and the stacked flat speaker units comprise at least two of the flat speaker units having the conductive electrodes respectively located at two utmost opposite sides of the flat loudspeaker and grounded.
A flat loudspeaker comprising a first flat speaker unit, a second flat speaker unit, and a third flat speaker unit stacked to one another, each of the first flat speaker unit, the second flat speaker unit, and the third flat speaker unit comprising:
- a perforated electrode structure having a plurality of holes;
- a vibrating membrane structure;
- and
- a supporting layer disposed between the vibrating membrane structure and the perforated electrode structure, the supporting layer having a plurality of supporting members,
- wherein the vibrating membrane structure, the supporting layer, and the perforated electrode structure are sequentially stacked to form one of the first flat speaker unit, the second flat speaker unit, and the third flat speaker unit, the electret vibrating membranes of the first and the second flat speaker units have a first electric charge, the electret vibrating membrane of the third flat speaker unit has a second electric charge, the conductive electrodes of the first, the second, and the third flat speaker units together connect a signal source, a polarity of the first electric charge is opposite to a polarity of the second electric charge,
- and the perforated electrode structures in the first and the second flat speaker units are respectively located at two utmost opposite sides of the flat loudspeaker.
A flat speaker unit comprising:
- a first vibrating membrane structure having a first surface and a second surface, a first conductive electrode being disposed on the first surface;
- a second vibrating membrane structure having a first surface and a second surface, a second conductive electrode being disposed on the first surface;
- a perforated electrode structure located between the second surface of the first vibrating membrane structure and the second surface of the second vibrating membrane structure;
- a first supporting layer disposed between the first vibrating membrane structure and the perforated electrode structure, the first supporting layer having a plurality of first supporting members;
- and
- a second supporting layer disposed between the second vibrating membrane structure and the perforated electrode structure, the second supporting layer having a plurality of second supporting members,
- wherein the first vibrating membrane structure, the first supporting layer, the perforated electrode structure, the second supporting layer, and the second vibrating membrane structure are stacked to form a stacked structure, and the first conductive electrode and the second conductive electrode are located at two utmost opposite sides of the stacked structure and form a resonance space in the stacked structure.
Dependencies are inferred from the claim text.