| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 381186000 | Plural diaphragms | 10 |
| 20090136065 | COMPOSITE SPEAKER AND ITS MANUFACTURING METHOD - A composite loudspeaker has a first loudspeaker and a second loudspeaker. The first loudspeaker has a first frame and a first voice coil, and the second loudspeaker has a second frame stacked on the first loudspeaker and a second voice coil. The first frame has first external connecting sections that are connected to respective terminals of the first voice coil. The second frame has second external connecting sections that are connected to terminals of second voice coil. The first external connecting sections and the second external connecting sections are disposed on substantially the same plane. | 05-28-2009 |
| 20090214063 | Compound Loudspeaker - A compound loudspeaker comprises an acoustically radiating first diaphragm and an acoustically radiating second diaphragm. The first and second diaphragms are substantially coaxial and at least part of the second diaphragm is situated radially outwards of the first diaphragm. There is a gap situated between the first and second diaphragms, and a seal is provided in the gap, thereby preventing or hindering the passage of air through the gap. By providing the seal, the invention solves the problem of audible turbulent airflow through the gap. | 08-27-2009 |
| 20100080406 | PUSH-PULL TYPE SPEAKER DEVICE AND METHOD OF MANUFACTURING THE SAME - A push-pull type speaker device and a method of manufacturing the same are provided. The speaker device includes a frame, a permanent magnet installed within the frame using a fixing device, a first diaphragm and a second diaphragm installed in opposite end portions of the frame, a pair of electromagnets, respectively corresponding to the first and second diaphragm, each installed at a distance from the permanent magnet,; and a power source driver for supplying current to the pair of electromagnets, wherein a winding direction of each electromagnet is formed such that, when current is provided from the power source driver to each of the electromagnets, the pair of electromagnets have an opposite magnetic flux direction. | 04-01-2010 |
| 20110064250 | PIEZOELECTRIC MICRO SPEAKER INCLUDING ANNULAR RING-SHAPED VIBRATING MEMBRANES AND METHOD OF MANUFACTURING THE PIEZOELECTRIC MICRO SPEAKER - A piezoelectric micro speaker and a method of manufacturing the same are provided. The piezoelectric micro speaker includes a substrate having a cavity formed therein and a diaphragm that is disposed on the substrate that overlaps the cavity. A plurality of first vibrating membranes having concentric annular ring shapes are disposed in a first region of the diaphragm corresponding to a center of the cavity. A second vibrating membrane including a different material from that of the first vibrating membranes is formed in the second region of the diaphragm corresponding to an edge of the cavity. A piezoelectric actuator for vibrating the first vibrating membranes is formed on and between the concentric annular rings of the first vibrating membranes. | 03-17-2011 |
| 20110216923 | STRUCTURE OF FLEXIBLE SPEAKER - A flexible speaker structure, includes, a first electret film having a first surface, a second electret film having a second surface, a conductive film positioned between the first electret and the second electret, a first spacer disposed on the first surface for supporting a first electrode, and a second spacer disposed on the second surface for supporting a second electrode. A first interior angle is defined by the first electret and the first spacer, and the first interior angle is between 60 to 80 degrees. | 09-08-2011 |
| 20110280420 | ACOUSTIC TRANSDUCER - There is provided an acoustic transducer which is reduced in size and which can generate an acoustic emission having a low frequency. The acoustic transducer of the present invention includes: a plurality of bending vibration modules | 11-17-2011 |
| 20120114148 | LOUDSPEAKER DRIVER AND LOUDSPEAKER ARRANGEMENT - A loudspeaker arrangement comprises a loudspeaker driver ( | 05-10-2012 |
| 20120275627 | Sandwich-type Woofer with Two Sound Wave Propagation Directions - A sandwich-type woofer with two sound wave propagation directions includes a first magnetic-conducting plate unit, a second magnetic-conducting plate unit, a magnet unit, a coil frame, a first vibrating unit, a second vibrating unit, a first coil and a second coil. The magnet unit is sandwiched between the first and second magnetic-conducting plate units. The coil frame extends through the first and second magnetic-conducting plate units and the magnet unit, and has first and second ends. The first vibrating unit is disposed at the first end of the coil frame and the second vibrating unit is disposed at the second end of the coil frame. The first coil is arranged on a portion of the coil frame corresponding to the first magnetic-conducting plate unit and the second coil is arranged on another portion of the coil frame corresponding to the second magnetic-conducting plate unit. | 11-01-2012 |
| 20130108085 | LOW PROFILE LOUDSPEAKER | 05-02-2013 |
| 20160094909 | Vertically and Horizontally Balanced Subwoofer - A speaker system, particularly useful as a subwoofer, comprises an enclosure with one acoustic transducer facing to the right and one acoustic transducer facing to the left, which effectively cancels out transducer cone mass induced vibration within the enclosure. The enclosure also has one passive radiator facing up and one passive radiator facing down. The passive radiator facing down effectively couples acoustic energy at very low frequencies into the floor. The passive radiators each have a rather a large area and high mass. The large, high mass, bottom mounted passive radiator will produce large amounts of enclosure vibration, and so to cancel this vibration, the upper passive radiator is of substantially the same mass and size. The resulting system will be vibrationally balanced on all axes while simultaneously effectively coupling low frequency energy onto the floor of the listening room with good efficiency. | 03-31-2016 |
