Patents by Inventor Isao Ginn Anazawa

Isao Ginn Anazawa 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).

  • Patent number: 9374052
    Abstract: A method, system and apparatus for voice coil protection using damping are provided. At a device and/or a system comprising: a processor; a sound transducer comprising a voice coil; a power supply; an amplifier in communication with the voice coil; and a circuit configured to apply an electromotive force (“EMF”) to the voice coil under control of the processor, the amplifier is placed into a standby state. When the amplifier is in the standby state, the circuit is controlled to apply the EMF to the voice coil using the power supply so that the voice coil has restricted excursion.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: June 21, 2016
    Assignee: BLACKBERRY LIMITED
    Inventor: Isao Ginn Anazawa
  • Publication number: 20160156322
    Abstract: A method, system and apparatus for voice coil protection using damping are provided. At a device and/or a system comprising: a processor; a sound transducer comprising a voice coil; a power supply; an amplifier in communication with the voice coil; and a circuit configured to apply an electromotive force (“EMF”) to the voice coil under control of the processor, the amplifier is placed into a standby state. When the amplifier is in the standby state, the circuit is controlled to apply the EMF to the voice coil using the power supply so that the voice coil has restricted excursion.
    Type: Application
    Filed: November 27, 2014
    Publication date: June 2, 2016
    Inventor: Isao Ginn ANAZAWA
  • Patent number: 9263023
    Abstract: A system and method for reproducing audio sound. Audio sound, based on an audio signal, is emitted within a space comprising an audio beamwidth. Modulated ultrasonic sound energy based on a modulated ultrasonic sound signal is emitted in an ultrasonic sound direction within an ultrasonic beamwidth that is less than and within the audio beamwidth. The modulated ultrasonic sound signal is generated such that the emitted modulated ultrasonic sound energy creates an audible cancellation sound with an amplitude substantially equal to an amplitude of the audio sound at a point within the ultrasonic beamwidth so as to combine with and cancel the audio sound at the point by being substantially out of phase with the audio sound along the ultrasonic sound direction.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: February 16, 2016
    Assignee: BlackBerry Limited
    Inventor: Isao Ginn Anazawa
  • Patent number: 9059668
    Abstract: A switching mode amplifier and method. A voltage divider comprising two series connected reactive components produces, on a center line, a fraction of a voltage received on a first line and a second line. The switching structure produce a fraction of the power supply voltage to the first port or the second port by either one of 1) a first configuration that connects the first port to the first input and the second port to the center line, or 2) a second configuration that connects the first port to the center line and the second port to the second input. A controller responds to a sequence of commands to provide the fraction of the voltage by alternating the switching structure between the first configuration and the second configuration.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: June 16, 2015
    Assignee: BlackBerry Limited
    Inventor: Isao Ginn Anazawa
  • Publication number: 20150117657
    Abstract: A system and method for reproducing audio sound. Audio sound, based on an audio signal, is emitted within a space comprising an audio beamwidth. Modulated ultrasonic sound energy based on a modulated ultrasonic sound signal is emitted in an ultrasonic sound direction within an ultrasonic beamwidth that is less than and within the audio beamwidth. The modulated ultrasonic sound signal is generated such that the emitted modulated ultrasonic sound energy creates an audible cancellation sound with an amplitude substantially equal to an amplitude of the audio sound at a point within the ultrasonic beamwidth so as to combine with and cancel the audio sound at the point by being substantially out of phase with the audio sound along the ultrasonic sound direction.
    Type: Application
    Filed: October 25, 2013
    Publication date: April 30, 2015
    Applicant: BlackBerry Limited
    Inventor: Isao Ginn ANAZAWA
  • Publication number: 20140056442
    Abstract: A switching mode amplifier and method. A voltage divider comprising two series connected reactive components produces, on a center line, a fraction of a voltage received on a first line and a second line. The switching structure produce a fraction of the power supply voltage to the first port or the second port by either one of 1) a first configuration that connects the first port to the first input and the second port to the center line, or 2) a second configuration that connects the first port to the center line and the second port to the second input. A controller responds to a sequence of commands to provide the fraction of the voltage by alternating the switching structure between the first configuration and the second configuration.
    Type: Application
    Filed: August 23, 2012
    Publication date: February 27, 2014
    Applicant: RESEARCH IN MOTION LIMITED
    Inventor: Isao Ginn ANAZAWA
  • Patent number: 8618875
    Abstract: Various embodiments are described herein for a multi-channel class-D amplifier and an associated processing method. In general, the multi-channel class-D amplifier comprises a signal source that provides a plurality of input signals and generates synchronization information; and a plurality of class-D amplifier channel modules, each class-D amplifier channel module being configured to process a corresponding input signal from the plurality of input signals according to the synchronization information to produce an output signal. The switching frequencies employed by the plurality of class-D amplifier channel modules are substantially similar to one another and the processing of the plurality of input signals is offset in time across the plurality of class-D amplifier channel modules.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: December 31, 2013
    Assignee: BlackBerry Limited
    Inventor: Isao Ginn Anazawa
  • Publication number: 20130154730
    Abstract: Various embodiments are described herein for a multi-channel class-D amplifier and an associated processing method. In general, the multi-channel class-D amplifier comprises a signal source that provides a plurality of input signals and generates synchronization information; and a plurality of class-D amplifier channel modules, each class-D amplifier channel module being configured to process a corresponding input signal from the plurality of input signals according to the synchronization information to produce an output signal. The switching frequencies employed by the plurality of class-D amplifier channel modules are substantially similar to one another and the processing of the plurality of input signals is offset in time across the plurality of class-D amplifier channel modules.
    Type: Application
    Filed: December 20, 2011
    Publication date: June 20, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventor: Isao Ginn Anazawa