Patents Assigned to xMEMS Labs, Inc.
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Publication number: 20230299786Abstract: A feedback control system configured to drive a load is disclosed. The feedback control system includes an up-sampling circuit, configured to perform an un-sampling operation on a source signal and produce an up-sampled signal with an up-sampling frequency according to the up-sampled signal and a feedback signal from the load; a delta circuit, coupled to the up-sampling circuit and configured to produce a delta signal; a sigma circuit, configured to produce a density modulation signal according to the delta signal; and a driving device, configured to drive the load according to the density modulation signal with the up-sampling frequency.Type: ApplicationFiled: March 6, 2023Publication date: September 21, 2023Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Hsi-Sheng Chen, Chieh-Yao Chang, Hung-Chi Huang, Jing-Meng Liu
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Publication number: 20230300539Abstract: An air-pulse generating device includes a film structure. The film structure is actuated such that the air-pulse generating device produces a plurality of air pulses. A horn-shaped outlet is formed within the air-pulse generating device, and the plurality of air pulses is propagated via the horn-shaped outlet.Type: ApplicationFiled: May 22, 2023Publication date: September 21, 2023Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Jye Ren, Lei Chen
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Publication number: 20230288884Abstract: The present invention discloses a feedback control system. The feedback control system comprises a plant, configured to produce an output according to a control signal; a first summing block, configured to produce a first difference between an input signal and a measured output signal; a first controller, configured to generate the control signal, such that the first difference decreases to be less than a first threshold or is less than the first threshold; wherein the first controller comprises a memory configured to store a table, and the table contains information of a plurality of transfer functions corresponding to a plurality of operating conditions; wherein the first controller determines an operating condition under which the plant operates, and chooses to utilize a transfer function corresponding to the operating condition to generate the control signal according to the transfer function and the first difference.Type: ApplicationFiled: March 3, 2023Publication date: September 14, 2023Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Chieh-Yao Chang, Hsi-Sheng Chen
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Publication number: 20230292058Abstract: An air-pulse generating device includes a film structure. The film structure is driven to form an amplitude-modulated ultrasonic air pressure variation with an ultrasonic carrier frequency. The film structure is driven to form an opening at a rate synchronous with the ultrasonic carrier frequency. The air-pulse generating device produces a plurality of air pulses according to the amplitude-modulated ultrasonic air pressure variation, and the plurality of air pulses is asymmetric.Type: ApplicationFiled: May 22, 2023Publication date: September 14, 2023Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Jye Ren, Eldwin Jiaqiang Ng
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Publication number: 20230291313Abstract: A method is applied in a pulse width modulation (PWM) controller within a driving circuit including a bidirectional circuit coupled to a load. The method includes steps of: obtaining a pulse width control code (PWCC) from a table stored in a memory within the PWM controller according to a difference between a first feedback signal from the load and an input signal, wherein the PWCC is corresponding to an intended voltage difference, and the first feedback signal is corresponding to a first cycle; generating a plurality of PWM signals according to the PWCC, wherein during a second cycle the bidirectional circuit performs a charging or discharging operation on the load according to the PWM signals; receiving a second feedback signal from the load corresponding to the second cycle; and updating the PWCC according to the first and second feedback signals, and saving the updated PWCC back to the table.Type: ApplicationFiled: October 23, 2022Publication date: September 14, 2023Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Hsi-Sheng Chen, Chieh-Yao Chang, Hung-Chi Huang
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Patent number: 11757360Abstract: A method is applied in a pulse width modulation (PWM) controller within a driving circuit including a bidirectional circuit coupled to a load. The method includes steps of: obtaining a pulse width control code (PWCC) from a table stored in a memory within the PWM controller according to a difference between a first feedback signal from the load and an input signal, wherein the PWCC is corresponding to an intended voltage difference, and the first feedback signal is corresponding to a first cycle; generating a plurality of PWM signals according to the PWCC, wherein during a second cycle the bidirectional circuit performs a charging or discharging operation on the load according to the PWM signals; receiving a second feedback signal from the load corresponding to the second cycle; and updating the PWCC according to the first and second feedback signals, and saving the updated PWCC back to the table.Type: GrantFiled: October 23, 2022Date of Patent: September 12, 2023Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Hsi-Sheng Chen, Chieh-Yao Chang, Hung-Chi Huang
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Patent number: 11758335Abstract: An air-pulse generating device includes a membrane structure, a valve structure, and a cover structure. A chamber is formed between the membrane structure, the valve structure and the cover structure. An air wave vibrating at an operating frequency is formed within the chamber. The valve structure is configured to be actuated to perform an open-and-close movement to form at least one opening. The at least one opening connects air inside the chamber with air outside the chamber. The open-and-close movement is synchronous with the operating frequency.Type: GrantFiled: December 17, 2021Date of Patent: September 12, 2023Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Wen-Chien Chen, Jye Ren
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Patent number: 11743659Abstract: An air-pulse generating device includes a membrane structure, a valve structure, and a cover structure. A chamber is formed between the membrane structure, the valve structure and the cover structure. An air wave vibrating at an operating frequency is formed within the chamber. The valve structure is configured to be actuated to perform an open-and-close movement to form at least one opening. The at least one opening connects air inside the chamber with air outside the chamber. The open-and-close movement is synchronous with the operating frequency.Type: GrantFiled: December 17, 2021Date of Patent: August 29, 2023Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Wen-Chien Chen, Jye Ren
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Publication number: 20230260494Abstract: A wearable sound device includes a venting device including a film structure and an actuator and a driving circuit configured to be controlled by a controller and to drive the actuator, such that the film structure is controlled to form a vent or to seal the vent. The controller is coupled to a sensing device configured to generate a sensing result and determine whether to seal the vent according to the sensing result. The film structure partitions a space within the wearable sound device into a first volume and a second volume. The first volume is connected to or to be connected to an ear canal of a wearable sound device user. The second volume is connected to or to be connected to an ambient of the wearable sound device. The first volume and the second volume are connected via the vent when the vent is formed.Type: ApplicationFiled: April 20, 2023Publication date: August 17, 2023Applicant: xMEMS Labs, Inc.Inventors: James Wargnier, Michael David Housholder, Yanchen Lu, JengYaw Jiang
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Patent number: 11711653Abstract: A sound producing cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.Type: GrantFiled: April 14, 2022Date of Patent: July 25, 2023Assignee: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hao-Hsin Chang, Wen-Chien Chen, Chun-I Chang
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Patent number: 11706569Abstract: A sound producing cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.Type: GrantFiled: October 20, 2022Date of Patent: July 18, 2023Assignee: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hao-Hsin Chang, Wen-Chien Chen, Chun-I Chang
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Patent number: 11695426Abstract: A successive approximation register (SAR) analog-to-digital converter (ADC) includes a comparator, a threshold generator and a controller. The comparator receives an analog signal and the SAR ADC outputs an output codeword. The comparator performs a plurality of first comparisons and a plurality of second comparisons. The controller determines a plurality of most significant bits of the output codeword according to a plurality of first comparison results corresponding to the first comparisons. The first comparisons are performed by comparing the analog signal with a plurality of first thresholds. The controller determines a plurality of least significant bits of the output codeword according to a plurality of second comparison results corresponding to the second comparisons. The second comparisons are performed by comparing the analog signal with a second threshold.Type: GrantFiled: February 21, 2023Date of Patent: July 4, 2023Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Hsi-Sheng Chen
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Publication number: 20230209241Abstract: A venting device is disposed within a wearable sound device or to be disposed within the wearable sound device. The venting device includes an anchor structure, a film structure and an actuator. The film structure includes an anchor end anchored on the anchor structure and a free end, and the film structure is configured to form a vent or close the vent. The actuator is disposed on the film structure. The film structure partitions a space into a first volume and a second volume, and the first volume and the second volume are connected via the vent when the vent is formed. The venting device is controlled by the controller to seal the vent when the controller determines to close the vent.Type: ApplicationFiled: February 22, 2023Publication date: June 29, 2023Applicant: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Martin George Lim, Jemm Yue Liang, Wen-Chien Chen
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Publication number: 20230209269Abstract: A sound producing cell includes a membrane and an actuating layer. The actuating layer is disposed on the membrane. The membrane is actuated by the actuating layer to produce sound. A plurality of holes is formed on the membrane.Type: ApplicationFiled: March 2, 2023Publication date: June 29, 2023Applicant: xMEMS Labs, Inc.Inventors: Chun-I Chang, Chiung C. Lo, Martin George Lim
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Publication number: 20230199392Abstract: A cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.Type: ApplicationFiled: October 19, 2022Publication date: June 22, 2023Applicant: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hao-Hsin Chang, Wen-Chien Chen, Chun-I Chang
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Publication number: 20230155597Abstract: A method, which is applied in a driving circuit including an analog-to-digital convertor (ADC) and a switching circuit including an inductor and coupled to a load, includes steps of: performing an analog-to-digital conversion on a load voltage of the load at a first rate; and producing at least a current pulse flowing through the inductor at a second rate. Wherein, each current pulse among the at least a current pulse is accomplished within a second cycle corresponding to the second rate, all of the at least a current pulse are accomplished within a first cycle corresponding to the first rate, and a first length of the first cycle is longer than twice of a second length of the second cycle.Type: ApplicationFiled: October 31, 2022Publication date: May 18, 2023Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Jing-Meng Liu, Hsi-Sheng Chen
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Publication number: 20230073046Abstract: A sound producing cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.Type: ApplicationFiled: October 20, 2022Publication date: March 9, 2023Applicant: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hao-Hsin Chang, Wen-Chien Chen, Chun-I Chang
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Publication number: 20230023306Abstract: A manufacturing method for a device includes: providing a wafer including a first layer and a second layer; forming and patterning an actuating material formed on the wafer; patterning the first layer of the wafer to form a trench line; and removing a first part of the second layer. The first layer forms a film structure including a membrane. A slit is formed within and penetrates through the membrane because of the trench line. The film structure is actuated to form a vent temporarily because of the slit. An ear canal and an ambient of a wearable sound device are to be connected via the vent temporarily opened. The slit divides the membrane into a first membrane portion and a second membrane portion. A difference between the displacements of these two membrane portions is larger than a thickness of the membrane when the vent is formed.Type: ApplicationFiled: September 29, 2022Publication date: January 26, 2023Applicant: 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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Publication number: 20220369036Abstract: A sound producing cell includes a membrane and an actuating layer. The membrane includes a first membrane subpart and a second membrane subpart, wherein the first membrane subpart and the second membrane subpart are opposite to each other. The actuating layer is disposed on the first membrane subpart and the second membrane subpart. The first membrane subpart includes a first anchored edge which is fully or partially anchored, and edges of the first membrane subpart other than the first anchored edge are non-anchored. The second membrane subpart includes a second anchored edge which is fully or partially anchored, and edges of the second membrane subpart other than the second anchored edge are non-anchored.Type: ApplicationFiled: April 14, 2022Publication date: November 17, 2022Applicant: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hao-Hsin Chang, Wen-Chien Chen, Chun-I Chang
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Publication number: 20220315412Abstract: A package structure includes a first substrate and a first device disposed on the first substrate. The first device includes at least one anchor structure, a film structure anchored by the anchor structure and an actuator configured to control the film structure to form a first vent temporarily. The film structure partitions a space into a first volume to be connected to an ear canal and a second volume connected to an ambient of a wearable sound device. The ear canal and the ambient are connected via the first vent when the first vent is opened. The first vent is opened by controlling a first membrane portion and a second membrane portion of the film structure, such that a difference between a first displacement of the first membrane portion and a second displacement of the second membrane portion is larger than a thickness of the film structure.Type: ApplicationFiled: June 17, 2022Publication date: October 6, 2022Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Chiung C. Lo, Martin George Lim, Wen-Chien Chen, Michael David Housholder, David Hong