Abrégé

An electromagnetic actuator includes an inner magnet arranged relative to an axis, an outer magnet arranged a radial distance from the axis, an inner radial wall of the outer magnet facing an outer radial wall of the inner magnet, the inner and outer radial walls being separated by an air gap, a voice coil arranged in the air gap separating the inner and outer magnets, and an actuator coupling plate attached to the voice coil. The inner magnet is axially magnetized and the outer magnet is radially magnetized. During operation of the device electrical activation of the voice coil causes axial motion of the actuator coupling plate.

Classes IPC  ?

• H04R 7/04 - Membranes planes
• H04R 9/02 - Transducteurs du type à bobine mobile, à lame mobile ou à fil mobile Détails
• G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur

Abrégé

A method includes determining, for a piezoelectric cantilever-type transducer of a distributed mode loudspeaker adapted to cause vibration of a load, a subset of frequencies from a range of frequencies at which to output vibrations, in which the transducer includes two or more electrode pairs positioned along a length of the transducer and each electrode pair including a first electrode on a first side of a piezoelectric layer of the transducer and a second electrode on a second side of the piezoelectric layer of the transducer that is opposite to the first side; selecting, for the subset of frequencies, a respective input voltage for each of the two or more electrode pairs based on a relative position of each pair on the transducer; and applying the respective input voltage to each of the two or more electrode pairs to cause the transducer to generate a vibrational force.

Classes IPC  ?

• H04R 1/24 - Combinaisons structurelles de transducteurs séparés ou de parties du même transducteur et sensibles respectivement à plusieurs bandes de fréquences
• H04R 17/00 - Transducteurs piézo-électriquesTransducteurs électrostrictifs
• H04R 7/04 - Membranes planes
• H01L 41/09 - Eléments piézo-électriques ou électrostrictifs à entrée électrique et sortie mécanique

Abrégé

An electromagnetic actuator includes an inner magnet arranged relative to an axis, an outer magnet arranged a radial distance from the axis, an inner radial wall of the outer magnet facing an outer radial wall of the inner magnet, the inner and outer radial walls being separated by an air gap, a voice coil arranged in the air gap separating the inner and outer magnets, and an actuator coupling plate attached to the voice coil. During operation of the device electrical activation of the voice coil causes axial motion of the actuator coupling plate.

Classes IPC  ?

• H04R 7/04 - Membranes planes
• H04R 9/02 - Transducteurs du type à bobine mobile, à lame mobile ou à fil mobile Détails
• G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur

Abrégé

A system includes a device chassis (102) with a back panel and a haptic conduction interface (210). An acoustic radiating panel (232), attached to the chassis, and the back panel define a space. A moving magnet actuator (201) is positioned in the space and mechanically coupled to the acoustic radiating panel, the moving magnet actuator including an element having a thickness smaller than a first dimension of the space, the moving magnet actuator being configured to vibrate the element during operating. An electronic control module coupled to the moving magnet actuator is programmed to activate the moving magnet actuator with a haptic signal that displaces the element in the first direction an amount sufficient to cause the element to contact the haptic conduction interface, the haptic signal having an amplitude and frequency sufficient to generate a haptic response in the device chassis.

Classes IPC  ?

• B06B 1/04 - Procédés ou appareils pour produire des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore utilisant l'énergie électrique fonctionnant par électromagnétisme
• H04R 9/00 - Transducteurs du type à bobine mobile, à lame mobile ou à fil mobile

Abrégé

A system includes a flat panel display having a panel resonant frequency response corresponding to a composition, shape, and structure of the flat panel display; and an actuator having an actuator resonant frequency response corresponding to a composition, size, and shape of the actuator; in which the actuator is mechanically-coupled to the flat panel display at a mechanical drive point, in which a coupled resonant frequency response of the system is lower than the panel resonant frequency response of the flat panel display.

Classes IPC  ?

• H04R 17/10 - Transducteurs résonnants, c.-à-d. adaptés pour produire une puissance de sortie maximum pour une fréquence déterminée
• H04R 7/04 - Membranes planes

Abrégé

Methods, systems, and apparatus for using a two-dimensional distributed mode actuator. One of the systems includes a transducer adapted to create a force to cause vibration of a load to generate sound waves, the transducer having a first width along a first axis; a transfer portion connected to the transducer along a first side parallel to the first axis, and having a second width along the first axis that is less than the first width; and a stub connected to the transfer portion along a second side of the transfer portion that is parallel to the first axis and an opposite side from the first side connected to the transducer, having a third width that is greater than the second width, and having a surface adapted to connect to the load to transfer the force received from the transducer through the transfer portion to the load.

Classes IPC  ?

• H04R 17/10 - Transducteurs résonnants, c.-à-d. adaptés pour produire une puissance de sortie maximum pour une fréquence déterminée
• H04R 7/04 - Membranes planes

Abrégé

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for changing a distributed mode loudspeaker's fundamental frequency. One of the systems includes a distributed mode loudspeaker comprising an actuator that includes: a supported portion, and a cantilevered portion having a length, a first fundamental frequency, and adapted to create a force to cause vibration of a load to generate sound waves using the first fundamental frequency; a support element connected to the supported portion of the actuator and adapted to adjust, based on a change to a shape of the support element, a size of the length of the cantilevered portion to change the first fundamental frequency to a second fundamental frequency with which the load will generate sound waves; and a frequency selection module that provides a signal to the support element to cause the support element to change shape.

Classes IPC  ?

• H04R 17/10 - Transducteurs résonnants, c.-à-d. adaptés pour produire une puissance de sortie maximum pour une fréquence déterminée
• H04R 7/04 - Membranes planes

Abrégé

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for selecting distributed mode loudspeaker electrodes using an output frequency. One of the methods includes determining, for a piezoelectric transducer, a subset of frequencies, from a range of frequencies, at which to output a sound; selecting, based on the subset of frequencies, one or more electrode pairs from two or more electrode pairs included in the piezoelectric transducer to generate the sound; and providing, by a drive module connected to each of the two or more electrode pairs, current to each of the selected one or more electrode pairs to cause the piezoelectric transducer to generate a force that, when provided to a load, causes the load to generate the sound within the subset of frequencies. 41301036f.docx

Classes IPC  ?

• H04R 17/00 - Transducteurs piézo-électriquesTransducteurs électrostrictifs
• H04R 1/24 - Combinaisons structurelles de transducteurs séparés ou de parties du même transducteur et sensibles respectivement à plusieurs bandes de fréquences
• H04R 7/04 - Membranes planes
• H04R 17/10 - Transducteurs résonnants, c.-à-d. adaptés pour produire une puissance de sortie maximum pour une fréquence déterminée

Abrégé

A panel loudspeaker controller (100) is disclosed that is for controlling a panel loudspeaker comprising a plurality of actuators. The panel loudspeaker controller comprises a plurality of electrical signal inputs (102), a plurality of signal processors (104), and a signal processor controller (108). Each input of the plurality of electrical signal inputs (102) is associated with each actuator of the panel loudspeaker to be controlled. Each signal processor (104) of the plurality of signal processors (104) is associated with each input (102) and has an output (106) for an electrical signal to control an actuator of the panel loudspeaker. Each signal processor implements a transfer function from its input to its output based on each actuator of the panel loudspeaker to a desired acoustic receiver. The signal processor controller (108) is associated with all of the plurality of signal processors (104). The signal processor controller (108) is preconfigured to improve phase alignment between the signals as an ensemble output at the outputs of the signal processors (104). A panel loudspeaker may be provided including the panel loudspeaker controller

Classes IPC  ?

• H04R 3/04 - Circuits pour transducteurs pour corriger la fréquence de réponse
• H04R 3/12 - Circuits pour transducteurs pour distribuer des signaux à plusieurs haut-parleurs
• H04R 7/04 - Membranes planes
• H04R 29/00 - Dispositifs de contrôleDispositifs de tests

Abrégé

This invention relates to switching amplifiers and switching power converters with bipolar outputs. A new circuit configuration is disclosed which is neither 'single ended' nor 'bridged'. This introduces a new category of amplifiers and power converters, which are 'spanning'. Also disclosed are new circuit topologies and new switching sequence strategies for such amplifiers and converters. These unlock improvements in power efficiency, space efficiency and cost efficiency. The improvements can be obtained across a wide range of signal amplitudes, with load circuits which may be resistive, partly reactive, or wholly reactive.

Classes IPC  ?

• H03F 3/217 - Amplificateurs de puissance de classe DAmplificateurs à commutation
• H02M 3/158 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p. ex. régulateurs à commutation comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de commande finale pour une charge unique

Produits et services

Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; compact discs, DVDs and other digital recording media; mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment, computers; computer software; fire-extinguishing apparatus; audio electronic apparatus; programmable electronic apparatus; audio electronic instruments;  electrical instruments for recording, checking and monitoring sound; loudspeakers; loudspeaker drive units; public address systems; display panels for advertising, information and publicity purposes, with integrated or incorporated loudspeakers; display apparatus, having electrical or electronic components; sound reproduction apparatus; sound generation apparatus; acoustic apparatus for reproducing sound; loudspeakers integral to ceiling tiles; loudspeakers incorporated into ceiling tiles, sound reverberation units; noise cancellation apparatus; noise supression apparatus; audio and video recording and reproducing equipment; amplifiers; tuners; turntables; compact disc players; cassette players; microphones; headphones; digital to analogue converters; magnetic and optical media for or bearing sound recordings; cables and connectors; televisions and video recorders; VDUs, video monitors, screens, display screens, computer screens, television screens and touch screen apparatus, all having integrated or incorporated loudspeakers; control units; computers; computer peripheral devices; touch sensors; touch screens; touch panels; touch pads; touch control screens; touch sensitive control panels; touch sensitive screens; touch sensitive overlays for screens; touch sensitive interfaces;  parts and fittings for all the aforesaid goods. Advertising; Business management; Business administration; Office functions; retail services connected with the sale of scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments, apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, apparatus for recording, transmission or reproduction of sound or images, magnetic data carriers, recording discs, automatic vending machines and mechanisms for coin-operated apparatus, cash registers, calculating machines, data processing equipment and computers, fire-extinguishing apparatus, electronic and electrical apparatus and instruments, loudspeakers, loudspeaker drive units, public address systems, display panels for advertising, information and publicity purposes, with integrated or incorporated loudspeakers, display apparatus, having electrical or electronic components, sound reproduction apparatus, sound generation apparatus, acoustic apparatus for reproducing sound, loudspeakers integral to ceiling tiles, loudspeakers incorporated into ceiling tiles, sound reverberation units, noise cancellation apparatus, noise supression apparatus, audio and video recording and reproducing equipment, amplifiers, tuners, turntables, compact disc players, cassette players, microphones, headphones, digital to analogue converters, magnetic and optical media for or bearing sound recordings, cables and connectors, televisions and video recorders, VDUs, video monitors, screens, display screens, computer screens, television screens and touch screen apparatus, all having integrated or incorporated loudspeakers, control units, computers, computer peripheral devices, touch sensors, touch screens, touch panels, touch pads, touch control screens, touch sensitive control panels, touch sensitive screens, touch sensitive overlays for screens, touch sensitive interfaces, haptics apparatus; information, advisory and consultancy services relating to all the aforesaid services. Scientific and technological services and research and design relating thereto; Industrial analysis and research services; Design and development of computer hardware and software; research, design and development of audio hardware; research, design and development of video hardware; research, design and development of haptics technology; research, design and development of bending wave technology; information, advisory and consultancy services relating to all the aforesaid services.

Produits et services

Electronic and electrical apparatus and instruments; loudspeakers; loudspeaker drive units; public address systems; display panels for advertising, information and publicity purposes, with integrated or incorporated loudspeakers; display apparatus, having electrical or electronic components; sound reproduction apparatus; sound generation apparatus; acoustic apparatus for reproducing sound; loudspeakers integral to ceiling tiles; loudspeakers incorporated into ceiling tiles; sound reverberation units; noise cancellation apparatus; noise suppression apparatus; audio and video recording and reproducing equipment; amplifiers, tuners, turntables, compact disc players, cassette players, microphones, headphones; digital to analogue converters; magnetic and optical media for or bearing sound recordings; cables and connectors; televisions and video recorders; control units; computers; computer peripheral devices; parts and fittings for all the aforesaid goods.