Patents by Inventor John B. French
John B. French has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240276153Abstract: Acoustic transducer systems and methods of operating acoustic transducer systems are provided. The methods can involve: receiving an input audio signal; determining a position of a diaphragm; determining a correction factor, a motor force factor, a spring error factor, and a system spring factor based at least on the position of the diaphragm; determining a corrected voice coil current based at least on the input audio signal, the correction factor, the spring error factor, and a velocity of the diaphragm; and applying a corrected audio signal to a voice coil fixed to the diaphragm based at least on the corrected voice coil current, wherein the corrected audio signal corrects the input audio signal to compensate for non-linear characteristics of the acoustic transducer system.Type: ApplicationFiled: April 22, 2024Publication date: August 15, 2024Inventor: John B. French
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Patent number: 11997466Abstract: Acoustic transducer systems and methods of operating acoustic transducer systems are provided. The methods can involve: receiving an input audio signal; determining a position of a diaphragm; determining a correction factor, a motor force factor, a spring error factor, and a system spring factor based at least on the position of the diaphragm; determining a corrected voice coil current based at least on the input audio signal, the correction factor, the spring error factor, and a velocity of the diaphragm; and applying a corrected audio signal to a voice coil fixed to the diaphragm based at least on the corrected voice coil current, wherein the corrected audio signal corrects the input audio signal to compensate for non-linear characteristics of the acoustic transducer system.Type: GrantFiled: June 28, 2022Date of Patent: May 28, 2024Assignee: Audera Acoustics Inc.Inventor: John B. French
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Publication number: 20230023373Abstract: Acoustic transducer systems and methods of operating acoustic transducer systems are provided. The methods can involve: receiving an input audio signal; determining a position of a diaphragm; determining a correction factor, a motor force factor, a spring error factor, and a system spring factor based at least on the position of the diaphragm; determining a corrected voice coil current based at least on the input audio signal, the correction factor, the spring error factor, and a velocity of the diaphragm; and applying a corrected audio signal to a voice coil fixed to the diaphragm based at least on the corrected voice coil current, wherein the corrected audio signal corrects the input audio signal to compensate for non-linear characteristics of the acoustic transducer system.Type: ApplicationFiled: June 28, 2022Publication date: January 26, 2023Inventor: John B. French
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Patent number: 11405729Abstract: Acoustic transducer systems and methods of operating acoustic transducer systems are provided. The methods can involve: receiving an input audio signal; determining a position of a diaphragm; determining a correction factor, a motor force factor, a spring error factor, and a system spring factor based at least on the position of the diaphragm; determining a corrected voice coil current based at least on the input audio signal, the correction factor, the spring error factor, and a velocity of the diaphragm; and applying a corrected audio signal to a voice coil fixed to the diaphragm based at least on the corrected voice coil current, wherein the corrected audio signal corrects the input audio signal to compensate for non-linear characteristics of the acoustic transducer system.Type: GrantFiled: March 1, 2021Date of Patent: August 2, 2022Inventor: John B. French
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Patent number: 10939212Abstract: An acoustic transducer includes a controller configured to receive an input audio signal and to generate a first reference signal indicative of an envelope of the input audio signal. The controller is further configured to provide a stationary coil signal to a stationary coil of an acoustic transducer based on the first reference signal and to measure a current through the stationary coil after providing the stationary coil signal to the stationary coil. The controller is further configured to generate a first output indicative of the current through the stationary coil and to determine a magnetic flux in an air gap of magnetic material based on the first output. The controller is further configured to generate a voltage output for a moving coil that is inversely proportional to the magnetic flux in the air gap. The voltage output provides an undistorted output that corresponds to the input audio signal.Type: GrantFiled: November 4, 2019Date of Patent: March 2, 2021Assignee: Harman International Industries, IncorporatedInventor: John B. French
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Publication number: 20200222791Abstract: A read and write playing card system and method are described. The playing card includes a unique card identification that uniquely identifies the playing card from other cards in the deck of playing cards. Additionally, the read and write playing card includes at least one playing card electronic component that receives data regarding game play. Furthermore, the read and write playing card includes at least one of the playing card electronic components that stores data regarding game play. Further still, the read and write playing card includes at least one of the playing card electronic components that transmits the unique card identification data, when activated by the electronic system.Type: ApplicationFiled: August 12, 2019Publication date: July 16, 2020Inventor: John B. French
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Publication number: 20200068313Abstract: An acoustic transducer includes a controller configured to receive an input audio signal and to generate a first reference signal indicative of an envelope of the input audio signal. The controller is further configured to provide a stationary coil signal to a stationary coil of an acoustic transducer based on the first reference signal and to measure a current through the stationary coil after providing the stationary coil signal to the stationary coil. The controller is further configured to generate a first output indicative of the current through the stationary coil and to determine a magnetic flux in an air gap of magnetic material based on the first output. The controller is further configured to generate a voltage output for a moving coil that is inversely proportional to the magnetic flux in the air gap. The voltage output provides an undistorted output that corresponds to the input audio signal.Type: ApplicationFiled: November 4, 2019Publication date: February 27, 2020Inventor: John B. FRENCH
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Patent number: 10469950Abstract: An acoustic transducer includes a controller configured to receive an input audio signal and to generate a first reference signal indicative of an envelope of the input audio signal. The controller is further configured to provide a stationary coil signal to a stationary coil of an acoustic transducer based on the first reference signal and to measure a current through the stationary coil after providing the stationary coil signal to the stationary coil. The controller is further configured to generate a first output indicative of the current through the stationary coil and to determine a magnetic flux in an air gap of magnetic material based on the first output. The controller is further configured to generate a voltage output for a moving coil that is inversely proportional to the magnetic flux in the air gap. The voltage output provides an undistorted output that corresponds to the input audio signal.Type: GrantFiled: September 25, 2017Date of Patent: November 5, 2019Assignee: Harman International Industries, IncorporatedInventor: John B. French
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Patent number: 10376775Abstract: A read and write playing card system and method are described. The playing card includes a unique card identification that uniquely identifies the playing card from other cards in the deck of playing cards. Additionally, the read and write playing card includes at least one playing card electronic component that receives data regarding game play. Furthermore, the read and write playing card includes at least one of the playing card electronic components that stores data regarding game play. Further still, the read and write playing card includes at least one of the playing card electronic components that transmits the unique card identification data, when activated by the electronic system.Type: GrantFiled: May 15, 2015Date of Patent: August 13, 2019Assignee: Milestone TechnologiesInventor: John B. French
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Publication number: 20190098416Abstract: An acoustic transducer includes a controller configured to receive an input audio signal and to generate a first reference signal indicative of an envelope of the input audio signal. The controller is further configured to provide a stationary coil signal to a stationary coil of an acoustic transducer based on the first reference signal and to measure a current through the stationary coil after providing the stationary coil signal to the stationary coil. The controller is further configured to generate a first output indicative of the current through the stationary coil and to determine a magnetic flux in an air gap of magnetic material based on the first output. The controller is further configured to generate a voltage output for a moving coil that is inversely proportional to the magnetic flux in the air gap. The voltage output provides an undistorted output that corresponds to the input audio signal.Type: ApplicationFiled: September 25, 2017Publication date: March 28, 2019Inventor: John B. FRENCH
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Patent number: 9936299Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.Type: GrantFiled: January 22, 2016Date of Patent: April 3, 2018Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu TarsasagInventor: John B. French
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Patent number: 9930446Abstract: The disclosure generally relates to acoustic transducers with stationary and moving coils, and methods for operating the acoustic transducers. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces sound. The time varying signals are derived from a composite signal that is provided, via a pair of conductors, to the acoustic transducer. The time varying signals are derived based on various filter methods.Type: GrantFiled: January 9, 2015Date of Patent: March 27, 2018Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatoll Felelossegu TarsasagInventors: John B. French, David Russell
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Patent number: 9807518Abstract: This invention relates to acoustic drivers with stationary and moving coils. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces audible sound. The time varying signals correspond to an input audio signal such that the sound corresponds to the input audio signal. Some of the described embodiments include multiple moving coils, multiple stationary coils or both. Some embodiments include feedback for adjusting one or more of the signals based on a characteristic of the acoustic driver. Various compensation and other features of the invention are also described in relation to various embodiments.Type: GrantFiled: December 30, 2015Date of Patent: October 31, 2017Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu TarsasagInventors: John B. French, Andrew J. Mason
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Publication number: 20160337752Abstract: The disclosure generally relates to acoustic transducers with stationary and moving coils, and methods for operating the acoustic transducers. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces sound. The time varying signals are derived from a composite signal that is provided, via a pair of conductors, to the acoustic transducer. The time varying signals are derived based on various filter methods.Type: ApplicationFiled: January 9, 2015Publication date: November 17, 2016Inventors: John B. FRENCH, David RUSSELL
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Patent number: 9438999Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion. The acoustic transducer may be a hybrid acoustic transducer.Type: GrantFiled: March 4, 2014Date of Patent: September 6, 2016Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu TarsasagInventor: John B. French
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Patent number: 9438998Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.Type: GrantFiled: March 4, 2014Date of Patent: September 6, 2016Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu TarsasagInventor: John B. French
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Publication number: 20160150322Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.Type: ApplicationFiled: January 22, 2016Publication date: May 26, 2016Inventor: John B. FRENCH
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Publication number: 20160127839Abstract: This invention relates to acoustic drivers with stationary and moving coils. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces audible sound. The time varying signals correspond to an input audio signal such that the sound corresponds to the input audio signal. Some of the described embodiments include multiple moving coils, multiple stationary coils or both. Some embodiments include feedback for adjusting one or more of the signals based on a characteristic of the acoustic driver. Various compensation and other features of the invention are also described in relation to various embodiments.Type: ApplicationFiled: December 30, 2015Publication date: May 5, 2016Inventors: John B. French, Andrew J. Mason
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Patent number: 9247350Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.Type: GrantFiled: February 7, 2013Date of Patent: January 26, 2016Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu TarsasagInventor: John B. French
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Patent number: 9241213Abstract: This invention relates to acoustic transducers with stationary and moving coils, and methods for operating the acoustic transducers. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces sound. The time varying signal applied to the moving coil corresponds to at least a processed version of an input audio signal and is updated based on, at least, a version of the time varying signal applied to the stationary coil. Some embodiments include updating the processed version of the input audio signal in response to a magnetic flux value corresponding to the time-varying signal applied to the stationary coil. Some embodiments include updating the time-varying signal applied to the moving coil in response to a feedback signal.Type: GrantFiled: September 25, 2014Date of Patent: January 19, 2016Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu TarsasagInventors: John B. French, David Russell