Thermal Response To, Or Generation Of, Sound Vibration Patents (Class 381/164)
  • Patent number: 10869147
    Abstract: The present disclosure provides a sound device, comprising a housing and a sound unit received in the housing, wherein, the housing comprises an upper cover plate with a receiving space, the upper cover plate is made of 3D glass, and the upper cover plate and the sound unit are fixed to each other by laser welding. The sound device provided by the present disclosure replacing the housing with a 3D glass housing, and thus enhances the strength of the housing, and the sealing and fixing is implemented by laser welding due to the transparent property of the 3D glass, which effectively prevents overflowing caused by gluing and ultrasonic welding, meanwhile the maximum cavity is ensured and the usage of the antenna will not be affected.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: December 15, 2020
    Assignee: AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventors: Chengliang Wang, Zhisheng Chen, Quan Shen
  • Patent number: 10712054
    Abstract: A thermoacoustic device includes a loop pipe, a first stack that is disposed in the loop pipe and that generates a sound wave in the loop pipe by way of a temperature gradient, a second stack that is disposed in the loop pipe and that generates a temperature gradient, a first high temperature side heat exchanger that is disposed at one end of the first stack and that makes the temperature of the one end of the first stack be higher than the other end, and a first low temperature side heat exchanger that is disposed at the other end of the first stack and that makes the temperature of the other end of the first stack be lower than the one end.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: July 14, 2020
    Assignees: JTEKT CORPORATION, UNIVERSITY PUBLIC CORPORATION OSAKA
    Inventors: Toshiyuki Saito, Ryouichi Takahata, Tomoyuki Takei, Osamu Ishikawa
  • Patent number: 10652666
    Abstract: A thermoacoustic device is provided with a housing having at least one open face. An active element is supported within the housing, and at least two electrodes are provided in electrical contact with the active element. A membrane is provided to cover each open face of the housing. The housing and membrane assembly is filled with a liquid. A signal lead is joined to the electrodes within the housing to communicate with the exterior of the housing. The active element can be made from a carbon nanotube sheet, and a gas can be provided in contact with the active element.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: May 12, 2020
    Inventors: Nathanael K Mayo, John B Blottman
  • Patent number: 10299685
    Abstract: Photoacoustic probes include reflective surfaces situated to redirect scattered or reflected optical radiation from a specimen surface back to the specimen. A reflective coating can reflect probe radiation while transmitting visible radiation so that a technician can view the specimen. One or more optical fibers and acoustic transducers can be secured to a lens or other substrate on which the reflective surface is defined. The light collector is configured to block scattered light so that an operator and a subject are not exposed to the scattered light.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 28, 2019
    Assignee: University of Pittsburgh—Of the Commonwealth System of Higher Education
    Inventors: Kang Kim, Zhaohui Wang, Seung Han Ha
  • Patent number: 10284967
    Abstract: A hearing device, particularly a hearing aid, has a housing, a signal processing unit arranged in the housing, a first sound generator disposed in the housing, and a second sound generator. The first sound generator and the second sound generator are configured to convert an output signal from the signal processing unit into sound. The second sound generator is a thermo-acoustic transducer.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: May 7, 2019
    Assignee: Sivantos Pte. Ltd.
    Inventors: Chuan Foong Lee, Eduardo Jr Bas, Hoong Yih Chan
  • Patent number: 10251006
    Abstract: A method for making thermoacoustic device includes following steps. A substrate having a first surface and second surface is provided. The first surface defines a plurality of grids. Grooves are formed on each of the plurality of grids. A first electrode and a second electrode are formed on each grid. The first electrode is spaced from the second electrode. One of the grooves is located between the first electrode and the second electrode. A number of carbon nanotube wires are applied on the first surface and electrically connected to the first electrode and the second electrode. A thermoacoustic device array is formed on the substrate by separating the carbon nanotube wires. A number of thermoacoustic device is formed by cutting the substrate according to the grids.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: April 2, 2019
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Yang Wei, Xiao-Yang Lin, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 9883293
    Abstract: A hearing device, particularly a hearing aid, has a housing, a signal processing unit arranged in the housing, a first sound generator disposed in the housing, and a second sound generator. The first sound generator and the second sound generator are configured to convert an output signal from the signal processing unit into sound. The second sound generator is a thermo-acoustic transducer.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: January 30, 2018
    Assignee: Sivantos Pte. Ltd.
    Inventors: Chuan Foong Lee, Eduardo Jr Bas, Hoong Yih Chan
  • Patent number: 9838802
    Abstract: A carbon nanotube thermophone is provided which includes a urethane frame having mounting holes at corners of the frame. Screw holes in the frame are provided for a cable holder. A square shaped carbon nanotube material chip is positioned within the urethane frame. The carbon nanotube material chip can comprise multiple carbon nanotube sheets to electrically tune the impedance to match a driving amplifier impedance load. Wooden spacers assist in positioning the carbon nanotube material chip. A first end of a cable is soldered to the carbon nanotube material chip at electrodes of the material chip. A high temperature rated silicon sealant is used for attachment points on the thermophone.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: December 5, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Thomas R Howarth, Dehua Huang
  • Patent number: 9838803
    Abstract: A carbon nanotube thermophone is provided. The thermophone includes high temperature rated shells as protective walls as the top and bottom housing of the thermophone with carbon nanotube sheets affixed between the shells. The shells act as acoustic windows that match the surrounding frequency and acoustic radiation medium. A high temperature rated sealant gasket is used to enclose the shells of the thermophone where gas holes are inserted for interior heavy gas filling. The acoustic resonant frequency is defined by the dimensions of the housing of the thermophone and the sound speed of the filled heavy gas. Each carbon nanotube sheet has an electrode at both ends. Multiple carbon nanotube sheets can electrically tune the impedance to match a driving amplifier impedance load.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: December 5, 2017
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Thomas R Howarth, Dehua Huang
  • Patent number: 9776872
    Abstract: A method for transferring a carbon nanotube array includes providing a substitute substrate, a growing substrate, and a carbon nanotube array. The carbon nanotube array is grown on the growing substrate. The substitute substrate has a surface having microstructures located thereon. A carbon nanotube structure can be drawn from the carbon nanotube array. The carbon nanotube structure includes carbon nanotube segments joined end-to-end. The carbon nanotube array is transferred from the growing substrate onto the substitute substrate. During transfer, the structural integrity of the carbon nanotube array is maintained.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: October 3, 2017
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Yang Wei, Shou-Shan Fan
  • Patent number: 9695042
    Abstract: A method for transferring a carbon nanotube array includes providing a substitute substrate, a growing substrate, and a carbon nanotube array. The carbon nanotube array is grown on the growing substrate. A carbon nanotube structure can be drawn from the carbon nanotube array. The carbon nanotube structure includes carbon nanotube segments joined end-to-end. The carbon nanotube array is transferred from the growing substrate onto the substitute substrate. During transfer, the structural integrity of the carbon nanotube array is maintained.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: July 4, 2017
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Yang Wei, Hao-Ming Wei, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 9635468
    Abstract: A suspended nanotube film (or films) producing sound by means of the thermoacoustic (TA) effect is encapsulated between two plates, at least one of which vibrates, to enhance sound generation efficiency and protect the film. To avoid the oxidation of carbon nanotubes at elevated temperatures and reduce the thermal inertia of surrounding medium the enclosure is filled with inert gas (preferably with high heat capacity ratio, ?=Cp/Cv, and low heat capacity, Cp). To generate sound directly as the first harmonic of applied audio signal without use of an energy consuming dc biasing, an audio signal modulated carrier frequency at much higher frequency is used to provide power input. Various other inventive means are described to provide enhanced projected sound intensity, increased projector efficiency, and lengthened projector life, like the use of infrared reflecting coatings and particles on the projector plates, non-parallel sheet alignment in sheet stacks, and cooling means on one projector side.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: April 25, 2017
    Assignee: Board of Regents, The University of Texas System
    Inventors: Ali E. Aliev, Ray H. Baughman
  • Patent number: 9587976
    Abstract: A photoacoustic transducer, such as a photoacoustic probe includes an optical fiber, diaphragm, at the optical fiber, whereby the optical fiber and diaphragm define a cavity, and an energy absorption film at the optical fiber, whereby an activating laser directed through the optical fiber can excite the energy absorption film to thereby generate an acoustic wave that, upon reflection upon a remote surface, can deflect the diaphragm and modify reflection of a detecting laser also directed through the optical fiber. A method of detecting an acoustic wave includes directing an activating laser through an optical fiber to an energy absorption film at the optical fiber, directing a detecting laser through the optical fiber and cavity to the diaphragm at the optical fiber, and measuring an interference pattern generated at least in part by reflection of the detecting laser from a surface of the diaphragm.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: March 7, 2017
    Assignee: UNIVERSITY OF MASSACHUSETTS
    Inventors: Xingwei Vivian Wang, Nan Wu
  • Patent number: 9061906
    Abstract: A thermoacoustic device includes a first substrate, a sound wave generator, a first electrode, a second electrode and a second substrate. A number of recesses are defined on a surface of the first substrate. The sound-producing parts of the wave generator are located on the surface and suspended over the recesses to enable very rapid expansion by heat, and contraction. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The sound wave generator is held in place by the first substrate and the second substrate. A number of through holes are defined by the second substrate. Some of the through holes correspond with the recesses to allow the output of sound.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: June 23, 2015
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Yang Wei, Shou-Shan Fan
  • Patent number: 8958579
    Abstract: A thermoacoustic device includes a substrate, a sound wave generator and a signal device. The substrate has a net structure and includes a number of first wires and a number of second wires. The first wires and the second wires are crossed with each other. Each of the first wires includes a composite wire. The composite wire includes a carbon nanotube wire structure and a coating layer wrapping the carbon nanotube wire structure. The sound wave generator is located on a surface of the substrate and includes a carbon film. The signal input device is configured to input signals to the sound wave generator.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: February 17, 2015
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Publication number: 20150010175
    Abstract: Embodiments of the invention include a micro speaker assembly that has two drivers, each having a separate yoke, set of magnets, voice coil, and acoustic diaphragms. One driver may produce high frequency (HF) sound while the other produces low frequency (LF) sound. The two drivers may be packaged, side-by-side, within the same micro speaker acoustic enclosure. The drivers may have their respective magnet systems physically connected to each other, in order to enhance heat transfer from one to the other. In particular, a thermally conductive portion or bridge may be used to directly join or thermally connect adjacent edges of the yoke portions of the two magnet systems, in order to enhance heat transfer between the first and second micro speaker drivers. Thus, the assembly can handle more power without overheating. Other embodiments are also described and claimed.
    Type: Application
    Filed: July 8, 2013
    Publication date: January 8, 2015
    Inventors: Scott P. Porter, Christopher Wilk, Ruchir M. Dave
  • Patent number: 8923534
    Abstract: An earphone includes a loudspeaker, a signal process, an audio signal input port, and a driving port. The loudspeaker includes a thermoacoustic device disposed in a housing. The signal processor is electrically connected to the loudspeaker to provide signal to the loudspeaker. The audio input port is electrically connected to the signal processor to provide audio signal. The power supply device is electrically connected to the signal processor to provide driving current. The thermoacoustic device includes a substrate, and the substrate defines a plurality of grooves, a sound wave generator is suspended on the plurality of grooves.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: December 30, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Shou-Shan Fan
  • Patent number: 8913764
    Abstract: An earphone includes a loudspeaker, a signal process, an audio signal input port, and a driving port. The loudspeaker includes a thermoacoustic device disposed in a housing. The signal processor is electrically connected to the loudspeaker to provide signal to the loudspeaker. The audio input port is electrically connected to the signal processor to provide audio signal. The power supply device is electrically connected to the signal processor to provide driving current. The thermoacoustic device includes a substrate, and the substrate defines a plurality of grooves, a sound wave generator is suspended on the plurality of grooves.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: December 16, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Shou-Shan Fan
  • Patent number: 8913765
    Abstract: An earphone includes a loudspeaker, a signal process, an audio signal input port, and a driving port. The loudspeaker includes a thermoacoustic device disposed in a housing. The signal processor is electrically connected to the loudspeaker to provide signal to the loudspeaker. The audio input port is electrically connected to the signal processor to provide audio signal. The driving port is electrically connected to the signal processor to provide driving signal. The thermoacoustic device includes a substrate, and the substrate defines a number of grooves, a sound wave generator is suspended on the grooves.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: December 16, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Xiao-Yang Lin, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 8905320
    Abstract: A room heating device includes a supporting body, a thermoacoustic element, a first electrode and a second electrode. The thermoacoustic element is disposed on the supporting body. The first electrode and the second electrode are connected to the thermoacoustic element. The first electrode is spaced apart from the second electrode.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: December 9, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Liang Liu, Chen Feng, Li Qian, Shou-Shan Fan
  • Patent number: 8908888
    Abstract: An earphone includes a housing and a thermoacoustic device. The housing has a hollow structure. The thermoacoustic device is disposed in the housing. The thermoacoustic device includes a substrate, a sound wave generator, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The substrate includes a first surface and a second surface opposite to the first surface. The first surface defines a number of recesses parallel with and spaced from each other. A depth of each of the recesses ranges from about 100 micrometers to about 200 micrometers. The sound wave generator is located on the first surface of the substrate. The sound wave generator includes a carbon nanotube structure that is suspended over the recesses.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: December 9, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Xiao-Yang Lin, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 8891807
    Abstract: There is provided a loudspeaker apparatus which has a diaphragm and a magnet system for driving the diaphragm. The loudspeaker apparatus also has a light source and a cooling device (K) having at least one cooling unit for cooling the at least one light source. The light source is thermally coupled to the first cooling unit. The first cooling unit with the at least one light source is arranged in front of the diaphragm. The outside of the diaphragm can have light reflecting properties.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: November 18, 2014
    Assignee: Sennheiser electronic GmbH & Co. KG
    Inventors: Achim Gleiβner, Jörg Knieschewski
  • Patent number: 8879757
    Abstract: A thermoacoustic device includes a substrate, a sound wave generator, an insulating layer, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The substrate includes a first surface and a second surface opposite to the first surface. The first surface defines a plurality of grooves, and a bulge is formed between the adjacent two grooves. The insulating layer is located on the first surface, and continuously attached on the grooves and the bulge. The sound wave generator is located on the insulating layer. The sound wave generator defines a first portion and a second portion. The first portion is suspended on the grooves. The second portion is attached on the bulge.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: November 4, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Xiao-Yang Lin, Kai-Li Jiang, Shou-Shan Fan
  • Patent number: 8873775
    Abstract: A thermoacoustic device comprise a substrate, a number of thermoacoustic units on the substrate, a number of switches, a driving integrated circuit, a scanning integrated circuit, and a common electrode. The switches are electrically connected to the thermoacoustic units. Each of the switches is electrically connected in series between the first electrode and the driving integrated circuit through a driving electrode. Each of the switches is electrically connected to the scanning integrated circuit through a scanning electrode. The common electrode is electrically connected to the second electrode of the number of thermoacoustic units.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: October 28, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Yang Wei, Shou-Shan Fan
  • Patent number: 8842857
    Abstract: A thermoacoustic device includes a sound wave generator and a signal input device. The sound wave generator includes a composite structure. The composite structure includes a carbon nanotube film structure and a graphene film. The carbon nanotube film structure includes a number of carbon nanotubes and micropores. The graphene film is located on a surface of the carbon nanotube film structure, and covers the micropores.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: September 23, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Patent number: 8837753
    Abstract: A thermoacoustic device includes a sound wave generator and a signal input device. The sound wave generator includes a carbon film. The carbon film includes at least one carbon nanotube layer and at least one graphene layer stacked on each other. The signal input device inputs signals to the sound wave generator.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: September 16, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Patent number: 8831269
    Abstract: A bobbin includes a stratiform composite structure. The stratiform composite structure includes an amorphous carbon structure and a carbon nanotube film structure composited with the amorphous carbon structure. The amorphous carbon structure and the carbon nanotube film structure are combined by van der Waals attractive force and covalent bonds therebetween.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: September 9, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Liang Liu, Jia-Ping Wang
  • Patent number: 8831252
    Abstract: A thermoacoustic device includes a substrate, at least two sound wave generators and at least two signal input devices. The substrate has at least two surfaces. Each of the at least two sound wave generators is located on each of the at least two surfaces. At least one of the at least two sound wave generator includes a carbon film. The carbon film includes at least one carbon nanotube layer and at least one graphene layer stacked with each other. The at least two signal input devices are configured to input signals to the at least two sound wave generator in a one by one manner.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: September 9, 2014
    Assignees: Tsinhua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Patent number: 8811631
    Abstract: A thermoacoustic device includes an electrode layer and a sound wave generator. The sound wave generator is disposed on a surface of the sound wave generator. The electrode layer includes a plurality of insulated wires and a plurality of conductive wires. The conductive wires are disposed apart from each other and crossed with the insulated wires. The sound wave generator is electrically connected with conductive wires.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: August 19, 2014
    Assignee: Beijing FUNATE Innovation Technology Co., Ltd.
    Inventor: Liang Liu
  • Patent number: 8811633
    Abstract: A thermoacoustic device includes a carbon nanotube composite structure, a sound wave generator and a signal input device. The carbon nanotube composite structure includes a carbon nanotube structure and a matrix. The matrix is located on a surface of the carbon nanotube structure. The sound wave generator is located on a surface of the carbon nanotube composite structure and insulated from the carbon nanotube structure via the coating layer. The sound wave generator includes a carbon film. The signal input device is configured to input signals to the sound wave generator.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: August 19, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Patent number: 8811632
    Abstract: A thermoacoustic device includes a substrate, at least two sound wave generators and at least two signal input devices. The substrate has at least two surfaces. Each of the at least two sound wave generators is located on each of the at least two surfaces. At least one of the at least two sound wave generator includes a carbon film. The carbon film includes at least one carbon nanotube layer and at least one graphene layer stacked with each other. The at least two signal input devices are configured to input signals to the at least two sound wave generator separately.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: August 19, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Publication number: 20140219479
    Abstract: A magnet assembly for a audio speaker provides a gap through which a voice coil assembly passes. A magnetic member, a yoke, and a pole piece form a magnetic circuit that focuses magnetic energy in the gap. A spider movably supports the voice coil assembly. The spider is coupled to one of the magnetic member or the yoke by forming the one of the magnetic member or the yoke in two parts and joining the two parts with a portion of the spider between the two parts. The spider may be formed from a thin film thermoplastic, such as polyetheretherketone (PEEK), and may be less than 10 microns thick. The portion of the spider that is between the two parts may be shaped such that a portion of the two parts are in direct contact with one another.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 7, 2014
    Applicant: APPLE INC.
    Inventor: Christopher Wilk
  • Patent number: 8798308
    Abstract: Systems and methods to remove heat from an acoustic enclosure are provided. An apparatus for reproducing acoustic signals includes an acoustic enclosure comprising an acoustic volume. A heat producing element is coupled to the acoustic enclosure, and a thermally conductive structure is thermally coupled to the heat producing element. The thermally conductive structure includes a first surface. A first passive radiator includes a first diaphragm. The first diaphragm extends over at least a portion of the first surface and moves in response to pressure variations within the acoustic volume. Movement of the first diaphragm causes air to flow over the first surface, to facilitate heat removal from the thermally conductive structure.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: August 5, 2014
    Assignee: Bose Corporation
    Inventors: Roman N. Litovsky, Chester Smith Williams
  • Publication number: 20140185840
    Abstract: A thermoacoustic device comprise a substrate, a number of thermoacoustic units on the substrate, a number of switches, a driving integrated circuit, a scanning integrated circuit, and a common electrode. The switches are electrically connected to the thermoacoustic units. Each of the switches is electrically connected in series between the first electrode and the driving integrated circuit through a driving electrode. Each of the switches is electrically connected to the scanning integrated circuit through a scanning electrode. The common electrode is electrically connected to the second electrode of the number of thermoacoustic units.
    Type: Application
    Filed: June 20, 2013
    Publication date: July 3, 2014
    Inventors: YANG WEI, SHOU-SHAN FAN
  • Publication number: 20140185841
    Abstract: A thermoacoustic device includes a first substrate, a sound wave generator, a first electrode, a second electrode and a second substrate. A number of recesses are defined on a surface of the first substrate. The sound-producing parts of the wave generator are located on the surface and suspended over the recesses to enable very rapid expansion by heat, and contraction. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The sound wave generator is held in place by the first substrate and the second substrate. A number of through holes are defined by the second substrate. Some of the through holes correspond with the recesses to allow the output of sound.
    Type: Application
    Filed: June 27, 2013
    Publication date: July 3, 2014
    Inventors: YANG WEI, SHOU-SHAN FAN
  • Patent number: 8763234
    Abstract: A method for making a thermoacoustic module is disclosed. An insulating substrate and a sound wave generator are provided. A conductive paste is screen printed on the insulating substrate to form a first patterned conductive paste layer. The sound wave generator is placed on the first patterned conductive paste layer and at least partially suspended above the insulating substrate by the patterned conductive paste layer.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: July 1, 2014
    Assignee: Beijing FUNATE Innovation Technology Co., Ltd.
    Inventors: Liang Liu, Li Qian
  • Patent number: 8767981
    Abstract: A thermoacoustic device includes a carbon nanotube composite structure, a sound wave generator and a signal input device. The carbon nanotube composite structure includes a carbon nanotube structure and a matrix. The matrix is located a surface of the carbon nanotube structure. The sound wave generator is located on a surface of the carbon nanotube composite structure and insulated from the carbon nanotube structure via the matrix. The sound wave generator includes a graphene layer including at least one graphene. The signal input device is configured to input signals to the sound wave generator.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: July 1, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Publication number: 20140140546
    Abstract: An earphone includes a housing and a thermoacoustic device. The housing has a hollow structure. The thermoacoustic device is disposed in the housing. The thermoacoustic device includes a substrate, a sound wave generator, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The substrate includes a first surface and a second surface opposite to the first surface. The first surface defines a number of recesses parallel with and spaced from each other. A depth of each of the recesses ranges from about 100 micrometers to about 200 micrometers. The sound wave generator is located on the first surface of the substrate. The sound wave generator includes a carbon nanotube structure that is suspended over the recesses.
    Type: Application
    Filed: June 26, 2013
    Publication date: May 22, 2014
    Inventors: YANG WEI, XIAO-YANG LIN, KAI-LI JIANG, SHOU-SHAN FAN
  • Publication number: 20140140547
    Abstract: A thermoacoustic device includes a PCB substrate, a speaker installed on the PCB substrate and including a sound wave generator, and an IC chip installed on the PCB substrate. The speaker and the IC chip are electrically connected by the PCB substrate. The IC chip input an audio signal to the speaker. The speaker heats surrounding medium intermittently according to the input signal so that the surrounding medium to produce a sound by expansion and contraction.
    Type: Application
    Filed: June 28, 2013
    Publication date: May 22, 2014
    Inventors: YANG WEI, SHOU-SHAN FAN
  • Publication number: 20140140545
    Abstract: A thermoacoustic device includes a substrate, a sound wave generator, an insulating layer, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The substrate includes a first surface and a second surface opposite to the first surface. The first surface defines a plurality of grooves, and a bulge is formed between the adjacent two grooves. The insulating layer is located on the first surface, and continuously attached on the grooves and the bulge. The sound wave generator is located on the insulating layer. The sound wave generator defines a first portion and a second portion. The first portion is suspended on the grooves. The second portion is attached on the bulge.
    Type: Application
    Filed: June 24, 2013
    Publication date: May 22, 2014
    Inventors: YANG WEI, XIAO-YANG LIN, KAI-LI JIANG, SHOU-SHAN FAN
  • Publication number: 20140140548
    Abstract: A thermoacoustic chip includes a shell having a hole and a speaker located in the shell. The speaker includes a substrate having a surface, a sound wave generator located on the surface of the substrate and opposite to the hole of the shell, and, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator.
    Type: Application
    Filed: June 28, 2013
    Publication date: May 22, 2014
    Inventors: YANG WEI, SHOU-SHAN FAN
  • Publication number: 20140140550
    Abstract: A thermoacoustic device array includes a substrate and a plurality of thermoacoustic device units located on a surface of the substrate. The substrate defines a number of recesses on the surface, and the recesses are spaced from and parallel with each other. Each thermoacoustic device unit includes a sound wave generator, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The sound wave generator is located on the surface and suspended over the recesses. At least one of the recesses is located between the first electrode and the second electrode, and one portion of the sound wave generator that is between the first electrode and the second electrode is suspended over the at least one of the recesses.
    Type: Application
    Filed: June 28, 2013
    Publication date: May 22, 2014
    Inventors: YANG WEI, XIAO-YANG LIN, KAI-LI JIANG, SHOU-SHAN FAN
  • Publication number: 20140140549
    Abstract: A thermoacoustic chip includes a substrate, a sound wave generator, a first electrode, and a second electrode, and an integrated circuit chip. The substrate has a first surface. The sound wave generator is located on the first surface of the substrate. The first electrode and a second electrode are spaced from each other and electrically connected to the sound wave generator. The integrated circuit chip is located on the substrate and electrically connected to the first electrode and the second electrode.
    Type: Application
    Filed: June 28, 2013
    Publication date: May 22, 2014
    Inventors: YANG WEI, SHOU-SHAN FAN
  • Publication number: 20140140544
    Abstract: An earphone includes a loudspeaker, a signal process, an audio signal input port, and a driving port. The loudspeaker includes a thermoacoustic device disposed in a housing. The signal processor is electrically connected to the loudspeaker to provide signal to the loudspeaker. The audio input port is electrically connected to the signal processor to provide audio signal. The power supply device is electrically connected to the signal processor to provide driving current. The thermoacoustic device includes a substrate, and the substrate defines a plurality of grooves, a sound wave generator is suspended on the plurality of grooves.
    Type: Application
    Filed: June 24, 2013
    Publication date: May 22, 2014
    Inventors: YANG WEI, SHOU-SHAN FAN
  • Patent number: 8634579
    Abstract: A thermoacoustic device includes a sound wave generator and a signal input device. The sound wave generator includes a graphene layer. The graphene layer includes at least one graphene. The signal input device inputs signals to the sound wave generator.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: January 21, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Patent number: 8625822
    Abstract: A thermoacoustic device includes a substrate, a sound wave generator and a signal device. The substrate has a net structure and includes a number of first wires and a number of second wires. The first wires and the second wires are crossed with each other. Each of the first wires includes a composite wire. The composite wire includes a carbon nanotube wire structure and a coating layer wrapping the carbon nanotube wire structure. The sound wave generator is located on a surface of the substrate and includes a graphene layer including at least one graphene. The signal input device is configured to input signals to the sound wave generator.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: January 7, 2014
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Kai-Li Jiang, Xiao-Yang Lin, Lin Xiao, Shou-Shan Fan
  • Patent number: 8615096
    Abstract: The present invention relates to a thermoacoustic device that includes an acoustic element. The acoustic element includes a substrate, a plurality of microspaces, and a metal film. The metal film is located above the substrate. A plurality of microspaces is defined between the substrate and the metal film. The metal film is partially suspended above the substrate.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: December 24, 2013
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Liang Liu, Zhuo Chen, Kai Liu, Chen Feng, Kai-Li Jiang, Shou-Shan Fan
  • Publication number: 20130266159
    Abstract: A loudspeaker includes a magnetic system defining a magnetic gap, a vibrating system, and a supporting system. The vibrating system includes a diaphragm, a voice coil bobbin disposed in the magnetic gap, a coil lead wire having a first end and a second end, and a voice coil wound around the voice coil bobbin and electrically connected to the first end. The supporting system includes a frame fixed to the magnetic system and receiving the vibrating system. The frame has a terminal electrically connected to the second end of the coil lead wire. The diaphragm is received in the frame. The voice lead wire includes at least one carbon nanotube wire structure. The carbon nanotube wire structure includes a plurality of carbon nanotubes.
    Type: Application
    Filed: May 31, 2013
    Publication date: October 10, 2013
    Inventors: LIANG LIU, JIA-PING WANG
  • Patent number: 8553912
    Abstract: A thermoacoustic device includes a sound wave generator, a signal element and a support element. The sound wave generator includes a carbon nanotube structure. The signal element is configured to transmit a signal. The carbon nanotube structure is configured to receive the signal and generate a sound wave. The support element includes a metal substrate and an insulating layer located on the metal substrate. The insulating layer is sandwiched between the metal substrate and the sound wave generator. The thermoacoustic device further includes two electrodes electrically connected to the carbon nanotube structure.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: October 8, 2013
    Assignee: Beijing FUNATE Innovation Technology Co., Ltd.
    Inventors: Yu-Quan Wang, Li Qian, Chen Feng, Liang Liu
  • Patent number: 8548188
    Abstract: A diaphragm includes a carbon nanotube film structure and an amorphous carbon structure composited with the carbon nanotube structure to form a stratiform composite structure. The carbon nanotube film structure defines a plurality of micropores therein. The amorphous carbon structure comprises a plurality of amorphous carbon particles received in the micropores.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: October 1, 2013
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Jia-Ping Wang, Liang Liu