A loudspeaker is proposed, having an enclosure where the following components are installed: a magnetic circuit, a permanent magnet, a coil, a system positioning the coil in the gap between the enclosure and a permanent magnet, a resonating membrane diffuser, attached by an attachment mechanism to the coil, and lead wires with terminals. The coil is star-shaped. The technical result is to increase the loudspeaker's power and efficiency, to reduce its weight and size, and to improve the sound quality.

The present disclosure provides a double-sided speaker, comprising a combination of a magnetic conductive carrying board and a side magnetic conductive member (or magnetic conductive carrying board component), a first magnetic circuit module, a second magnetic circuit module, a first voice coil, a second voice coil, a first vibrating component, and a second vibrating component. The magnetic conductive carrying board comprises two sidewalls and a bottom plate. The two sidewalls are disposed at two sides of one side surface of the bottom plate. The side magnetic conductive member is disposed at two sides of the other side surface of the bottom plate. The first magnetic circuit module is disposed at one side of the magnetic conductive carrying board. The second magnetic circuit module is disposed at the other side of the magnetic conductive carrying board.

A speaker unit with dual diaphragms and dual coils includes a casing, first and second magnetic members, and first and second vibration systems. The casing has a chamber. The first and second magnetic members are disposed in the chamber. The first vibration system includes a first diaphragm fixed on the casing and located in the chamber, and a first coil fixed on the first diaphragm and located beside the first magnetic member. The first diaphragm has a ring shape. An orthogonal projection of the second magnetic member on an inner bottom surface of the casing is completely located in an orthogonal projection of a central opening of the first diaphragm on the inner bottom surface. The second vibration system includes a second diaphragm fixed on the casing and located in the chamber, and a second coil fixed on the second diaphragm and located beside the second magnetic element.

The present invention discloses a loudspeaker driver comprising a magnet system having at least one gap where in each gap a voice coil assembly is arranged for movement in the gap, wherein either two distinct coils are arranged on the voice coil assembly, one above the other, and the magnet system comprises two pole pieces, one above the other, creating a pair of magnetized areas between said pole pieces and a yoke, such that a magnetic flux field is created between each pole piece and the yoke. In an alternative two concentric gaps are provided, where the voice coil assembly comprises two concentrically arranged sub-voice coils, where each sub-voice coil is provided with a distinct voice coil and the magnet assembly has two concentrically arranged magnet rings arranged with a yoke in the center, such that two concentric gaps are created, and that the voice coil assembly moves substantially orthogonal to the flux fields in the gap(s) and further that at least the part of each pole piece facing the gap(s) is made from a soft magnetic composite (SMC) material.

The present invention relates to a flat panel speaker with which a speaker can be implemented by maximizing the number of coil turns and reduce unnecessary coil lines and weight. The flat panel speaker may include a pair of magnetic bodies with a movable coil plate therebetween, the magnetic bodies being spaced apart from each other, and movable coils patterned and printed in a printed circuit board (PCB) track shape, and laminated in even numbered layers with two or more layers, wherein: the movable coils are patterned and printed on the movable coil plate of each layer as a first coil track and a second coil track; each of the first coil track and the second coil track comprises a horizontal and vertical line coil; the horizontal line coil is formed by connecting a plurality of lines in parallel; and the vertical line coil is formed in a single line.

The present disclosure provides a sound generating unit, a sound generating module and electronic terminal, comprising a magnetic circuit system, a vibration system, and a circuit board. The voice coil is jointly wound by two voice coil wires, and the two end portions of each voice coil wire respectively form a wire-in end and a wire-out end; the lead-out positions of the two wire-in ends are located on two sides of the voice coil and arranged diagonally, and the lead-out positions of the two wire-out ends are located on two sides of the voice coil and arranged diagonally; the two wire-in ends and the two wire-out ends are electrically connected to the corresponding pads of the circuit board respectively, and the internal circuit of the circuit board is configured to electrically connect the two wire-in ends together, and electrically connect the two wire-out ends together.

Embodiments are disclosed of a flat speaker containing a single permanent magnet, a yoke opposite the single permanent magnet, and one or more voice coil plates located between the single permanent magnet and the yoke. The one or more voice coil plates each comprise a bobbin and a coil arranged on one or both sides of the bobbin.

Disclosed are a voice coil assembly and a loudspeaker, comprising a main voice coil and a connecting coil connected to the main voice coil, the main voice coil is connected to an external circuit, and comprises a first voice coil and a second voice coil, the first voice coil is formed by winding a conductive first wire with self-bonding coating, the second voice coil is formed by winding a second wire with self-bonding coating, the first voice coil and the second voice coil are positioned close to each other and bonded together, the first voice coil and the second voice coil are connected in series or in parallel, the connecting coil is formed by winding a third wire, and the density of the third wire is less than or equal to that of the first wire and the second wire.

Embodiments are disclosed of a flat speaker containing a single permanent magnet, a yoke opposite the single permanent magnet, and one or more voice coil plates located between the single permanent magnet and the yoke. The one or more voice coil plates each comprise a bobbin and a coil arranged on one or both sides of the bobbin.

A method for driving a voice coil of a loudspeaker may include providing a magnetic circuit having an air gap, providing a voice coil suspended in the air gap, and applying an audio signal to the voice coil to move it along a travelling axis. The voice coil comprises a main voice coil section, and a pair of auxiliary voice coil sections arranged along the travelling axis with auxiliary voice coil sections arranged respectively on either side of the main voice coil section. Applying an audio signal comprises continuously coupling a main driving signal based on the audio signal to the main voice coil and selectively coupling an auxiliary driving signal based on the audio signal to the pair of auxiliary voice coil sections. The disclosed embodiments further relate to a voice coil driving system and a loudspeaker comprising a voice coil driving system.