Abstract

An electrostatic transducer, a diaphragm therefor, and corresponding methods of manufacture are disclosed. The electrostatic transducer is preferably for use in a motor vehicle. A composite laminated diaphragm is manufactured by providing a first insulating layer, providing a conductive layer on a surface of the first insulating layer, and bonding a second insulating layer to the conductive layer such that the second insulating layer extends over the conductive layer. The first and second insulating layers each comprise a sheet of uncharged insulating material. The thickness of the composite laminated diaphragm is less than 20 μm. Manufacturing the electrostatic transducer comprises securing a first conductive stator, a first insulating spacer and the diaphragm in a stack with the first insulating spacer between the first conductive stator and the diaphragm to provide a spacing of less than 1 mm between the first conductive stator and the diaphragm.

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 7/10 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Abstract

An electrostatic transducer includes first and second flexible conductive membranes; and first and second conductive stators. The membranes and the stators are assembled in a layered configuration with the membranes the stators. The electrostatic transducer is arranged in use to apply an electrical potential which gives rise to an electrostatic force between the membranes and the stators that causes the membranes to move relative to the stators. The first and second flexible conductive membranes have respective first and second effective compliances, wherein the first effective compliance is at least 10% greater than the second effective compliance.

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers

Abstract

An electrostatic transducer includes first and second flexible conductive membranes; and first and second conductive stators. The membranes and the stators are assembled in a layered configuration with the membranes between the stators and with an enclosed volume of air sealed between the first and second membranes. The electrostatic transducer is arranged in use to apply an electrical potential which gives rise to an electrostatic force between the membranes and the stators that causes the membranes to move relative to the stators.

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 7/06 - Plane diaphragms comprising a plurality of sections or layers
• H04R 7/16 - Mounting or tensioning of diaphragms or cones

Abstract

An electrostatic transducer, a diaphragm (2) therefor, and corresponding methods of manufacture are disclosed. The electrostatic transducer is preferably for use in a motor vehicle. A composite laminated diaphragm (2) is manufactured by providing a first insulating layer (4), providing a conductive layer (6) on a surface of the first insulating layer (4), and bonding a second insulating layer (10) to the conductive layer (6) such that the second insulating layer (10) extends over the conductive layer (6). The first and second insulating layers (4, 10) each comprise a sheet of uncharged insulating material. The thickness of the composite laminated diaphragm (2) is less than 20 μm. Manufacturing the electrostatic transducer comprises securing a first conductive stator, a first insulating spacer and the diaphragm (2) in a stack with the first insulating spacer between the first conductive stator and the diaphragm (2) to provide a spacing of less than 1 mm between the first conductive stator and the diaphragm (2).

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 7/10 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Abstract

An electrostatic transducer (200) comprises first and second flexible conductive membranes (204, 206); and first and second conductive stators (208, 210). The membranes (204, 206) and the stators (208, 210) are assembled in a layered configuration with the membranes (204, 206) between the stators (208, 210). The electrostatic transducer (200) is arranged in use to apply an electrical potential which gives rise to an electrostatic force between the membranes (204, 206) and the stators (208, 210) that causes the membranes (204, 206) to move relative to the stators (208, 210). The first and second flexible conductive membranes (204, 206) have respective first and second effective compliances, wherein the first effective compliance is at least 10% greater than the second effective compliance.

IPC Classes  ?

• H04R 7/08 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid
• H04R 19/02 - Loudspeakers
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
• H04R 7/10 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Abstract

An electrostatic transducer (200) comprises first and second flexible conductive membranes (204, 206); and first and second conductive stators (208, 210). The membranes (204, 206) and the stators (208, 210) are assembled in a layered configuration with the membranes (204, 206) between the stators (208, 210) and with an enclosed volume of air (226) sealed between the first and second membranes (204, 206). The electrostatic transducer (200) is arranged in use to apply an electrical potential which gives rise to an electrostatic force between the membranes (204, 206) and the stators (208, 210) that causes the membranes (204, 206) to move relative to the stators (208, 210).

IPC Classes  ?

• H04R 7/08 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers separated by air or other fluid
• H04R 19/02 - Loudspeakers
• H04R 1/24 - Structural combinations of separate transducers or of parts of the same transducer and responsive respectively to two or more frequency ranges
• H04R 7/10 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Abstract

An electrostatic transducer, a diaphragm (2) therefor, and corresponding methods of manufacture are disclosed. The electrostatic FIG. 1 transducer is preferably for use in a motor vehicle. A composite laminated diaphragm (2) is manufactured by providing a first insulating layer (4), providing a conductive layer (6) on a surface of the first insulating layer (4), and bonding a second insulating layer (10) to the conductive layer (6) such that the second insulating layer (10) extends over the conductive layer (6). The first and second insulating layers (4, 10) each comprise a sheet of uncharged insulating material. The thickness of the composite laminated diaphragm (2) is less than 20 μm. Manufacturing the electrostatic transducer comprises securing a first conductive stator, a first insulating spacer and the diaphragm (2) in a stack with the first insulating spacer between the first conductive stator and the diaphragm (2) to provide a spacing of less than 1 mm between the first conductive stator and the diaphragm (2).

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 7/10 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Goods & Services

Audio and multimedia systems for use in vehicles consisting primarily of computer display screens, touch screens, radio receivers and radio signal tuners, and media players

Abstract

An electrostatic transducer, a diaphragm (2) therefor, and corresponding methods of manufacture are disclosed. The electrostatic transducer is preferably for use in a motor vehicle. A composite laminated diaphragm (2) is manufactured by providing a first insulating layer (4), providing a conductive layer (6) on a surface of the first insulating layer (4), and bonding a second insulating layer (10) to the conductive layer (6) such that the second insulating layer (10) extends over the conductive layer (6). The first and second insulating layers (4, 10) each comprise a sheet of uncharged insulating material. The thickness of the composite laminated diaphragm (2) is less than 20pm. Manufacturing the electrostatic transducer comprises securing a first conductive stator, a first insulating spacer and the diaphragm (2) in a stack with the first insulating spacer between the first conductive stator and the diaphragm (2) to provide a spacing of less than 1mm between the first conductive stator and the diaphragm (2).

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 7/10 - Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Goods & Services

Headphones; electrostatic loudspeakers; amplifiers, DACs (digital-to-analogue converters) and cables for use with the aforesaid goods; audio and multimedia systems for use in vehicles; parts and fittings for all the aforesaid goods.

Goods & Services

Headphones; electrostatic loudspeakers; amplifiers, DACs (digital-to-analogue converters) and cables for use with the aforesaid goods; audio and multimedia systems for use in vehicles; parts and fittings for all the aforesaid goods.

Goods & Services

(1) Headphones, electrostatic loudspeakers, audio amplifiers, DACs (digital-to-analogue converters) and cables for use with the aforesaid goods, audio and multimedia systems for use in vehicles, namely vehicle radios, stereos and stereos with LED display, and parts and fittings for all the aforesaid goods

Goods & Services

Headphones; electrostatic loudspeakers; amplifiers, DACs (digital-to-analogue converters); connection cables and electric cables for use with the aforesaid goods; audio and multimedia systems for use in vehicles, in the nature of speakers, amplifiers, equalizers, crossovers, speaker housings, computer display screens, touch screens, radio receivers and radio signal tuners, CD players, digital audio players, DVD players, and media players; component parts for headphones, electrostatic loudspeakers, amplifiers and DACs (digital-to-analogue converters); component parts of audio and multimedia systems for use in vehicles, namely speakers, amplifiers, equalizers, crossovers, speaker housings, computer display screens, touch screens, radio receivers and radio signal tuners, CD players, digital audio players, DVD players, and media players

Abstract

An electrostatic transducer (100) comprises an electrically conductive first member (102) having an array of through apertures (112) and one or more further members (104, 106). The one or more further members (104, 106) include a flexible electrically conductive second member (106) arranged in use to be displaced from an equilibrium position towards the first member (102) by an electrostatic force in response to an electrical potential applied to one or both of the first member (102) and the second member (106). At least one (104) of the one or more further members is resiliently deformable and is arranged in use to exert a resilient biasing force biasing said second member (106) back towards said equilibrium position when displaced therefrom by said electrical potential.

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 7/14 - Non-planar diaphragms or cones corrugated, pleated, or ribbed

Abstract

An electrostatic transducer (100) comprises an electrically conductive backplane member (102) having an array of through apertures (112); a spacer member (104) disposed over the backplane member (102), the spacer member (104) having an array of holes (114) therethrough, the holes (114) each having a maximum lateral dimension less than twice a minimum lateral dimension; and a flexible electrically conductive membrane (106) disposed over the spacer member (104). The transducer (100) is arranged in use to apply an electrical potential which gives rise to an attractive electrostatic force between the backplane member (102) and the membrane (106) thereby moving portions of the membrane (106) spanning said holes in the spacer member (104) towards said backplane member (102).

IPC Classes  ?

• H04R 19/02 - Loudspeakers
• H04R 19/00 - Electrostatic transducers