Patents by Inventor Hao-Hsin Chang
Hao-Hsin Chang 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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Patent number: 11974104Abstract: A linearity compensation method for a sound producing device (SPD) includes steps of: applying a test signal on a first SPD; obtaining an acoustic measurement result generated from the first SPD according to the test signal; generating a compensation curve according to the acoustic measurement result; and performing a linearity compensation operation on a second SPD according to the compensation curve.Type: GrantFiled: January 13, 2022Date of Patent: April 30, 2024Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Yanchen Lu, Hao-Hsin Chang
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Patent number: 11943595Abstract: 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: GrantFiled: October 19, 2022Date of Patent: March 26, 2024Assignee: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hao-Hsin Chang, Wen-Chien Chen, Chun-I Chang
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Publication number: 20240031740Abstract: 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: September 22, 2023Publication date: January 25, 2024Applicant: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hao-Hsin Chang, Wen-Chien Chen, Chun-I Chang
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Publication number: 20240022859Abstract: A package structure includes a cover and a cell disposed within the cover. The cell includes a membrane, an actuating layer and an anchor structure. 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 in a top view. The actuating layer is disposed on the first membrane subpart and the second membrane subpart in the top-view direction. The membrane is anchored by the anchor structure. 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: July 25, 2023Publication date: January 18, 2024Applicant: xMEMS Labs, Inc.Inventors: Chiung C. Lo, Hao-Hsin Chang, Wen-Chien Chen, Chun-I Chang, Chao-Yu Chen, Hai-Hung Wen
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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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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: 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: 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: 20220256283Abstract: A linearity compensation method for a sound producing device (SPD) includes steps of: applying a test signal on a first SPD; obtaining an acoustic measurement result generated from the first SPD according to the test signal; generating a compensation curve according to the acoustic measurement result; and performing a linearity compensation operation on a second SPD according to the compensation curve.Type: ApplicationFiled: January 13, 2022Publication date: August 11, 2022Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Yanchen Lu, Hao-Hsin Chang
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Patent number: 11304005Abstract: A crossover circuit, disposed within a sound producing device including a first sound producing cell driven by a first driving signal and a second sound producing cell driven by a second driving signal, includes a first filter receiving an input signal at an input terminal of the first filter, a first subtraction circuit, and a second filter coupled between the output terminal of the first filter and the second input terminal of the first subtraction circuit. A first input terminal of the first subtraction circuit is coupled to the input terminal of the first filter; a second input terminal of the first subtraction circuit is coupled to an output terminal of the first filter. The crossover circuit produces the first driving signal and the second driving signal according to a first output signal of the first subtraction circuit and a second output signal of the first filter respectively.Type: GrantFiled: September 28, 2021Date of Patent: April 12, 2022Assignee: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Hsi-Sheng Chen, Chiung C. Lo, Wen-Chien Chen, Chun-I Chang, Hao-Hsin Chang, Chieh-Yao Chang
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Publication number: 20220014851Abstract: A crossover circuit, disposed within a sound producing device including a first sound producing cell driven by a first driving signal and a second sound producing cell driven by a second driving signal, includes a first filter receiving an input signal at an input terminal of the first filter, a first subtraction circuit, and a second filter coupled between the output terminal of the first filter and the second input terminal of the first subtraction circuit. A first input terminal of the first subtraction circuit is coupled to the input terminal of the first filter; a second input terminal of the first subtraction circuit is coupled to an output terminal of the first filter. The crossover circuit produces the first driving signal and the second driving signal according to a first output signal of the first subtraction circuit and a second output signal of the first filter respectively.Type: ApplicationFiled: September 28, 2021Publication date: January 13, 2022Applicant: xMEMS Labs, Inc.Inventors: Jemm Yue Liang, Hsi-Sheng Chen, Chiung C. Lo, Wen-Chien Chen, Chun-I Chang, Hao-Hsin Chang, Chieh-Yao Chang
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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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Publication number: 20210250689Abstract: 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: ApplicationFiled: January 20, 2021Publication date: August 12, 2021Inventors: Jemm Yue Liang, Hsi-Sheng Chen, Chiung C. Lo, Wen-Chien Chen, Chun-I Chang, Hao-Hsin Chang