Patents Assigned to xMEMS Labs, Inc.
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Publication number: 20220009768Abstract: A sound producing package structure includes a plurality of chips disposed within a cavity. The chips includes a first chip and a second chip, the first chip includes a first sound producing membrane and a first actuator attached to the first sound producing membrane, and a second chip includes a second sound producing membrane and a second actuator attached to the second sound producing membrane. The first sound producing membrane and the second sound producing membrane are actuated toward a center of the cavity in a synchronous fashion so as to produce a sound pressure.Type: ApplicationFiled: June 9, 2021Publication date: January 13, 2022Applicant: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Jemm Yue Liang
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Publication number: 20220014836Abstract: An acoustic transducer is disposed within a wearable sound device or to be disposed within the wearable sound device. The acoustic transducer includes a first anchor structure and a first flap. The first flap includes a first end and a second end. The first end is anchored by the first anchor structure, and the second end is configured to perform a first up-and-down movement to form a vent temporarily. The first flap partitions a space into a first volume to be connected to an ear canal and a second volume to be connected to an ambient of the wearable sound device. The ear canal and the ambient are connected via the vent temporarily opened.Type: ApplicationFiled: June 11, 2021Publication date: January 13, 2022Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Chiung C. Lo, Martin George Lim, Wen-Chien Chen, Michael David Housholder, David Hong
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Patent number: 11223891Abstract: A system, disposed within a wearable hearing device, includes a sound producing device (SPD) driven by a driving voltage, a first sound sensing device, and a subtraction circuit. The first sound sensing device is configured to sense a combined sound pressure produced at least by the SPD and generate a sensed signal accordingly. The subtraction circuit has a first input terminal, a second input terminal, and a first output terminal. The first input terminal is coupled to the first sound sensing device, and the first output terminal is coupled to the SPD. A first phase delay between the driving voltage and the sensed signal is less than 60°.Type: GrantFiled: January 14, 2021Date of Patent: January 11, 2022Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Hsi-Sheng Chen
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Patent number: 11172300Abstract: A sound producing device includes a first sound producing cell, driven by a first driving signal and configured to produce a first acoustic sound on a first audio band, and a second sound producing cell, driven by a second driving signal and configured to produce a second acoustic sound on a second audio band different from the first audio band. A first membrane of the first sound producing cell and a second membrane of the second sound producing cell are Micro Electro Mechanical System fabricated membranes. The first audio band is upper bounded by a first maximum frequency; the second audio band is upper bounded by a second maximum frequency. A first resonance frequency of the first membrane is higher than the first maximum frequency of the first driving signal. A second resonance frequency of the second membrane is higher than the second maximum frequency of the second driving signal.Type: GrantFiled: January 20, 2021Date of Patent: November 9, 2021Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Hsi-Sheng Chen, Chiung C. Lo, Wen-Chien Chen, Chun-I Chang, Hao-Hsin Chang
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Patent number: 11172310Abstract: A sound producing device includes at least one air pulse generating element. Each of the at least one air pulse generating element includes a membrane, a first air chamber and at least one opening, wherein a chamber pressure exists in the first air chamber. The membrane is actuated to change the chamber pressure of the first air chamber to generate a plurality of air pulses, the air pulses are propagated through the at least one opening, the air pulses produce a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a pressure value of an ambient pressure outside the sound producing device.Type: GrantFiled: February 27, 2020Date of Patent: November 9, 2021Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Lei Chen
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Publication number: 20210314688Abstract: A sound producing package structure includes a shell and a chip. The shell includes a top structure, a bottom structure and a sidewall structure. The chip is disposed inside the shell and configured to produce an acoustic wave, wherein the chip includes a thin film structure and an actuator configured to actuate the thin film structure, and the thin film structure is substantially parallel to the top structure and the bottom structure. A first opening is formed on the sidewall structure, and the acoustic wave propagates outwards through the first opening.Type: ApplicationFiled: June 16, 2021Publication date: October 7, 2021Applicant: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hsien-Ken Liao, Martin George Lim
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Patent number: 11133784Abstract: A method applied in a driving circuit is disclosed. The driving circuit is coupled between a voltage source and a load and configured to drive the load. The method includes: forming, by the driving circuit, a first current from the voltage source to the load; and forming, by the driving circuit, a second current from the load back to the voltage source.Type: GrantFiled: September 16, 2020Date of Patent: September 28, 2021Assignee: xMEMS Labs, Inc.Inventor: Jemm Yue Liang
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Patent number: 11057692Abstract: A driving circuit is disclosed. The driving circuit includes a first node, coupled to at least a first air pulse generating element, wherein the driving circuit produces a first driving signal to the at least a first air pulse generating element via the first node; a second node, coupled to at least a second air pulse generating element, wherein the driving circuit produces a second driving signal to the at least a second air pulse generating element via the second node; a first swapping module, coupled to the first node and the second node, configured to be conducted within a first conduction interval; wherein a first voltage level at the first node and a second voltage level at the second node are substantially swapped after the first conduction interval.Type: GrantFiled: December 24, 2020Date of Patent: July 6, 2021Assignee: xMEMS Labs, Inc.Inventor: Jemm Yue Liang
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Patent number: 11057716Abstract: A sound producing device includes a base and at least one chip disposed on the base. The chip includes at least one membrane and at least one actuator. The membrane includes a coupling plate and at least one spring structure connected to the coupling plate. The actuator is configured to receive a driving signal corresponding to an input audio signal to actuate the membrane, and the input audio signal and the driving signal have an input audio band which has an upper bound at a maximum frequency. The spring structure is situated between the coupling plate and the actuator. The membrane has a first resonance frequency higher than the maximum frequency.Type: GrantFiled: July 2, 2020Date of Patent: July 6, 2021Assignee: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Wen-Chien Chen, Chun-I Chang, Jemm Yue Liang
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Patent number: 11051108Abstract: A sound producing device is disclosed. The sound producing device includes a first air pulse generating element, driven by a first driving signal comprising a first electrical pulse, the first electrical pulse comprises a first transition edge with a first transition polarity; and a second air pulse generating element, disposed adjacent to the first air pulse generating element, driven by a second driving signal comprising a second electrical pulse, the second electrical pulse comprises a second transition edge with a second transition polarity; wherein the first transition polarity is opposite to the second transition polarity; wherein the first transition edge generally coincides with the second transition edge; wherein air pulses generated by the first or the second air pulse generating element produce non-zero offset in terms of sound pressure level.Type: GrantFiled: December 24, 2020Date of Patent: June 29, 2021Assignee: xMEMS Labs, Inc.Inventor: Jemm Yue Liang
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Patent number: 11043197Abstract: An air pulse generating element is disclosed. The air pulse generating element includes a membrane, actuated according to a driving signal; a plate, wherein a chamber is formed between the plate and the membrane; wherein during a first phase of the driving signal, the membrane is actuated to change a volume within the chamber to generate an air pulse; wherein during a second phase of the driving signal, the membrane is actuated such that a gap is temporarily formed; wherein the temporarily formed gap is configured to provide a temporary air shunt to accelerate an air balancing process between a first air pressure at a first side of the membrane and a second air pressure at a second side of the membrane.Type: GrantFiled: December 23, 2020Date of Patent: June 22, 2021Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Jye Ren
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Patent number: 10979808Abstract: The present invention provides a sound producing device comprising: an air pulse generating element and a control unit. The air pulse generating element comprises an air chamber and an actuator. The control unit, configured to generate a driving voltage applied to the actuator of the air pulse generating element, such that the air pulse generating element generates a plurality of air pulses in response to the driving voltage. The plurality of air pulses are at a pulse rate, and the pulse rate of the plurality of air pulses is higher than a maximum audible frequency.Type: GrantFiled: May 8, 2019Date of Patent: April 13, 2021Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Chiung C. Lo
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Patent number: 10867594Abstract: An audio apparatus includes a sound sensing device, a first amplifier and a sound producing device. The sound sensing device configured to detect an ambient sound pressure. The first amplifier coupled to the sound sensing device is configured to convert a first signal corresponding to the ambient sound pressure into a second signal with inverted polarity of the first signal. The sound producing device is coupled to the first amplifier and configured to produce a counter sound pressure corresponding to the second signal. Overall phase delay from the ambient sound pressure to the counter sound pressure is less than 25 degrees.Type: GrantFiled: March 17, 2020Date of Patent: December 15, 2020Assignee: xMEMS Labs, Inc.Inventor: Jemm Yue Liang
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Patent number: 10863280Abstract: A sound producing device is provided. The sound producing device includes a membrane, disposed within a chamber, controlled by a membrane control signal to cause a membrane movement; and a first deflector, disposed within a first opening by the membrane, controlled by a first deflector control signal to cause a first deflector rotation; wherein the sound producing device produces a plurality of air pulses via the membrane movement and the first deflector rotation, the plurality of air pulses has an air pulse rate, the air pulse rate is higher than a maximum human audible frequency; wherein the plurality of air pulses produces a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a zero sound pressure level.Type: GrantFiled: July 31, 2019Date of Patent: December 8, 2020Assignee: xMEMS Labs, Inc.Inventor: Jemm Yue Liang
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Patent number: 10805751Abstract: A sound producing device (SPD) is provided. The SPD comprises a membrane, having a resonance frequency and a resonance bandwidth; and an actuator, disposed on the membrane, receiving a driving signal corresponding to an input audio signal; wherein the input audio signal has an input audio band which is upper bounded by a maximum frequency; wherein the resonance frequency is higher than the maximum frequency plus a half of the resonance bandwidth.Type: GrantFiled: November 26, 2019Date of Patent: October 13, 2020Assignee: xMEMS Labs, Inc.Inventor: Jemm Yue Liang
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Patent number: 10783866Abstract: A sound producing device includes at least one air pulse generating element. Each of the at least one air pulse generating element includes a membrane, a first air chamber and at least one opening, wherein a chamber pressure exists in the first air chamber, and the opening is connected between the first air chamber and an ambient surrounding the sound producing device. The membrane is actuated to change the chamber pressure of the first air chamber to generate a plurality of air pulses, the air pulses are propagated through the at least one opening, the air pulses produce a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a pressure value of an ambient pressure outside the sound producing device.Type: GrantFiled: March 4, 2020Date of Patent: September 22, 2020Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Lei Chen, Martin George Lim
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Patent number: 10779088Abstract: A sound producing device includes at least one air pulse generating element. Each of the at least one air pulse generating element includes a membrane, a first air chamber and at least one opening, wherein a chamber pressure exists in the first air chamber. The membrane is actuated to change the chamber pressure of the first air chamber to generate a plurality of air pulses, the air pulses are propagated through the at least one opening, the air pulses produce a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a pressure value of an ambient pressure outside the sound producing device. Each pulse cycle has a pulse-generating time segment and a pulse-isolating time segment, the driving signal during the pulse-generating time segment is different from the driving signal during the pulse-isolating time segment.Type: GrantFiled: March 12, 2020Date of Patent: September 15, 2020Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Lei Chen
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Patent number: 10771891Abstract: A method for manufacturing an air pulse generating element is provided. First, a thin film layer including a membrane is provided, and then, a plurality of actuators are formed on the thin film layer. After that, a first chamber is formed between the thin film layer and a first plate and followed by patterning the thin film layer to form a plurality of valves, in which the membrane and the valves are formed of the thin film layer. Subsequently, a second chamber is formed between the thin film layer and a second plate, and a plurality of channels are formed in the first plate and the second plate.Type: GrantFiled: April 10, 2019Date of Patent: September 8, 2020Assignee: xMEMS Labs, Inc.Inventors: David Hong, Chiung C. Lo, Chun-I Chang
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Patent number: 10771893Abstract: A sound producing apparatus is provided. The sound producing apparatus includes a driving circuit, configured to generate a driving signal according to an input audio signal; and a sound producing device; wherein the sound producing device is driven by the driving signal, such that the sound producing device produces a plurality of air pulses at an air pulse rate, the air pulse rate is higher than a maximum human audible frequency; wherein the plurality of air pulses produces a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a zero sound pressure level; wherein the driving signal driving the sound producing device to produce the plurality of air pulses, is unipolar with respect to a first voltage.Type: GrantFiled: May 25, 2020Date of Patent: September 8, 2020Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Wen-Chien Chen
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Patent number: 10681488Abstract: A sound producing apparatus is provided. The sound producing apparatus includes a sound producing device disposed at a sound producing location and configured to produce a plurality of air pulses according to a driving signal; a driving circuit, receiving an input audio signal and a channel-shaping signal and configured to generate the driving signal according to the input audio signal and the channel-shaping signal, wherein the channel-shaping signal is related to a channel impulse response of a channel between the sound producing location and a sound constructing location; a signal processing circuit, configured to generate the channel-shaping signal according to the channel impulse response.Type: GrantFiled: August 26, 2019Date of Patent: June 9, 2020Assignee: xMEMS Labs, Inc.Inventor: Jemm Yue Liang