Patents by Inventor Tien-Chi Lin
Tien-Chi Lin 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: 20240102860Abstract: An apparatus includes a six-axis correction stage, an auto-collimation measurement device, a light splitter, a telecentric image measurement device, and a controller. The six-axis correction stage carries a device under test; the auto-collimation measurement device is arranged above the six-axis correction stage along a measurement optical axis; the light splitter is arranged on the measurement optical axis and is interposed between the six-axis correction stage and the auto-collimation measurement device. A method controls the six-axis correction stage to correct rotation errors in at least two degrees of freedom of the device under test according to a measurement result of the auto-collimation measurement device, and controls the six-axis correction stage to correct translation and yaw errors in at least three degrees of freedom of the device under test according to a measurement result of the telecentric image measurement device by means of the controller.Type: ApplicationFiled: September 5, 2023Publication date: March 28, 2024Inventors: Cheng Chih HSIEH, Tien Chi WU, Ming-Long LEE, Yu-Hsuan LIN, Tsung-I LIN, Chien-Hao MA
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Patent number: 11939268Abstract: A method of forming low-k material is provided. The method includes providing a plurality of core-shell particles. The core of the core-shell particles has a first ceramic with a low melting point. The shell of the core-shell particles has a second ceramic with a low melting point and a low dielectric constant. The core-shell particles are sintered and molded to form a low-k material. The shell of the core-shell particles is connected to form a network structure of a microcrystal phase.Type: GrantFiled: December 23, 2020Date of Patent: March 26, 2024Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Kuo-Chuang Chiu, Tzu-Yu Liu, Tien-Heng Huang, Tzu-Chi Chou, Cheng-Ting Lin
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Patent number: 11482936Abstract: A signal transmission circuit is configured for transmitting control information from a secondary side of a power converter to a primary side of the power converter. The signal transmission circuit includes a transmitter circuit, a signal transformer and a detection circuit. The transmitter circuit is configured to generate a ramp signal at least according to a first control signal outputted from the secondary side. The first control signal indicates the control information provided for a switch in the primary side. The signal transformer, coupled to the transmitter circuit, is configured to convert the ramp signal to generate an output signal. The output signal includes a positive-going component and a negative-going component to indicate the control information. The detection circuit, coupled to the signal transformer, is configured to detect the positive-going component and the negative-going component to provide the control information for the switch.Type: GrantFiled: April 30, 2020Date of Patent: October 25, 2022Assignee: ALPHA AND OMEGA SEMICONDUCTOR INTERNATIONAL LPInventors: Hung-Ta Hsu, Hsiang-Chung Chang, Yueh-Ping Yu, Tien-Chi Lin
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Patent number: 11444000Abstract: A charger includes a thermal conductive plate for heat dissipation, and a transistor. The transistor includes a drain terminal of a first pulsating voltage level, and a source terminal of a second pulsating voltage level. The second pulsating voltage level is lower than the first pulsating voltage level. The source terminal is disposed closer to the thermal conductive plate than the drain terminal.Type: GrantFiled: April 14, 2018Date of Patent: September 13, 2022Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Yu-Ming Chen, Tien-Chi Lin, Guan-Yu Lin, Tin-Wei Chen
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Patent number: 11431252Abstract: A flyback converter, including: a transformer, a first switch, a second switch, and a control circuit. The transformer includes a first side and a second side. The first switch is coupled to the first side at an input terminal. The second switch is coupled to the second side and an output terminal. The control circuit is coupled between the output terminal and the second switch, wherein the control circuit is arranged to adjust a voltage on the input terminal by changing a flow of a current between the second switch and the second side.Type: GrantFiled: May 22, 2020Date of Patent: August 30, 2022Assignee: ALPHA AND OMEGA SEMICONDUCTOR INTERNATIONAL LPInventors: Guan-Yu Lin, Yu-Ming Chen, Jung-Pei Cheng, Tien-Chi Lin, Hsiang-Chung Chang, Yueh-Ping Yu
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Patent number: 11336185Abstract: A flyback converter includes a transformer, a sensing impedance, a switch and a control circuit. The sensing impedance is coupled between the transformer and an output terminal of the flyback converter. The switch is coupled to the transformer. The transformer is charged when the switch activates. The transformer is discharged when the switch deactivates. The control circuit is arranged to detect if the sensing impedance is bypassed, and further arranged to adjust an operating frequency of the switch when the sensing impedance is bypassed.Type: GrantFiled: May 11, 2020Date of Patent: May 17, 2022Assignee: ALPHA AND OMEGA SEMICONDUCTOR INTERNATIONAL LPInventors: Guan-Yu Lin, Yu-Ming Chen, Tien-Chi Lin, Tin-Wei Chen, Hsiang-Chung Chang, Yueh-Ping Yu
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Patent number: 11258270Abstract: A charger comprises a housing, a first multi-layer printed circuit board (PCB), a second multi-layer PCB, and a third multi-layer PCB. The first PCB comprises at least a portion of a primary side circuit. The second PCB comprises at least a portion of a secondary side circuit. The third PCB is perpendicular to the first PCB and the second PCB. An isolation coupling element is disposed on the third PCB. The isolation coupling element comprises a multi-layer PCB. The first PCB comprises a high voltage (HV) semiconductor package. A surface of a die paddle of the HV semiconductor package is exposed from a molding encapsulation of the HV semiconductor package.Type: GrantFiled: June 28, 2019Date of Patent: February 22, 2022Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Pei-Lun Huang, Yu-Ming Chen, Tien-Chi Lin, Jung-Pei Cheng, Yueh-Ping Yu, Zhi-Qiang Niu, Xiaotian Zhang, Long-Ching Wang
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Publication number: 20210367523Abstract: A flyback converter, including: a transformer, a first switch, a second switch, and a control circuit. The transformer includes a first side and a second side. The first switch is coupled to the first side at an input terminal. The second switch is coupled to the second side and an output terminal. The control circuit is coupled between the output terminal and the second switch, wherein the control circuit is arranged to adjust a voltage on the input terminal by changing a flow of a current between the second switch and the second side.Type: ApplicationFiled: May 22, 2020Publication date: November 25, 2021Applicant: ALPHA AND OMEGA SEMICONDUCTOR INTERNATIONAL LPInventors: Guan-Yu Lin, Yu-Ming Chen, Jung-Pei Cheng, Tien-Chi Lin, Hsiang-Chung Chang, Yueh-Ping Yu
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Publication number: 20210351702Abstract: A flyback converter includes a transformer, a sensing impedance, a switch and a control circuit. The sensing impedance is coupled between the transformer and an output terminal of the flyback converter. The switch is coupled to the transformer. The transformer is charged when the switch activates. The transformer is discharged when the switch deactivates. The control circuit is arranged to detect if the sensing impedance is bypassed, and further arranged to adjust an operating frequency of the switch when the sensing impedance is bypassed.Type: ApplicationFiled: May 11, 2020Publication date: November 11, 2021Applicant: ALPHA AND OMEGA SEMICONDUCTOR INTERNATIONAL LPInventors: Guan-Yu Lin, Yu-Ming Chen, Tien-Chi Lin, Tin-Wei Chen, Hsiang-Chung Chang, Yueh-Ping Yu
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Publication number: 20210344273Abstract: A signal transmission circuit is configured for transmitting control information from a secondary side of a power converter to a primary side of the power converter. The signal transmission circuit includes a transmitter circuit, a signal transformer and a detection circuit. The transmitter circuit is configured to generate a ramp signal at least according to a first control signal outputted from the secondary side. The first control signal indicates the control information provided for a switch in the primary side. The signal transformer, coupled to the transmitter circuit, is configured to convert the ramp signal to generate an output signal. The output signal includes a positive-going component and a negative-going component to indicate the control information. The detection circuit, coupled to the signal transformer, is configured to detect the positive-going component and the negative-going component to provide the control information for the switch.Type: ApplicationFiled: April 30, 2020Publication date: November 4, 2021Applicant: ALPHA AND OMEGA SEMICONDUCTOR INTERNATIONAL LPInventors: Hung-Ta Hsu, Hsiang-Chung Chang, Yueh-Ping Yu, Tien-Chi Lin
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Patent number: 11127520Abstract: A voltage converter comprises a second controller as a power switch of the secondary side of the transformer for comparing a detection voltage representing an output voltage and/or load current with a first reference voltage and generating a control signal, and a coupling element for transmitting the control signal generated by the second controller to the first controller on the primary side of the transformer enabling the first controller to generate a first pulse signal driving the power switch to control the on/off state of the primary side winding.Type: GrantFiled: October 5, 2018Date of Patent: September 21, 2021Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Tien-Chi Lin, Yu-Ming Chen, Jung-Pei Cheng, Pei-Lun Huang
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Publication number: 20200412148Abstract: A charger comprises a housing, a first multi-layer printed circuit board (PCB), a second multi-layer PCB, and a third multi-layer PCB. The first PCB comprises at least a portion of a primary side circuit. The second PCB comprises at least a portion of a secondary side circuit. The third PCB is perpendicular to the first PCB and the second PCB. An isolation coupling element is disposed on the third PCB. The isolation coupling element comprises a multi-layer PCB. The first PCB comprises a high voltage (HV) semiconductor package. A surface of a die paddle of the HV semiconductor package is exposed from a molding encapsulation of the HV semiconductor package.Type: ApplicationFiled: June 28, 2019Publication date: December 31, 2020Applicant: Alpha and Omega Semiconductor (Cayman) Ltd.Inventors: Pei-Lun Huang, Yu-Ming Chen, Tien-Chi Lin, Jung-Pei Cheng, Yueh-Ping Yu, Zhi-Qiang Niu, Xiaotian Zhang, Long-Ching Wang
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Patent number: 10818568Abstract: A charger comprises a housing, a first multi-layer printed circuit board (PCB), a second multi-layer PCB, and a third multi-layer PCB. The first PCB comprises at least a portion of a primary side circuit. The second PCB comprises at least a portion of a secondary side circuit. The third PCB is perpendicular to the first PCB and the second PCB. An isolation coupling element is disposed on the third PCB. The isolation coupling element comprises a multi-layer PCB. The first PCB comprises a high voltage (HV) semiconductor package. A surface of a die paddle of the HV semiconductor package is exposed from a molding encapsulation of the HV semiconductor package.Type: GrantFiled: June 28, 2019Date of Patent: October 27, 2020Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Pei-Lun Huang, Yu-Ming Chen, Tien-Chi Lin, Jung-Pei Cheng, Yueh-Ping Yu, Zhi-Qiang Niu, Xiaotian Zhang, Long-Ching Wang
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Patent number: 10651750Abstract: A constant on-time isolated converter comprises a transformer with a primary side and a secondary side. The primary side is connected to an electronic switch and secondary-side is connected to a load and a processor. The processor is connected to a driver on primary side through at least one coupling element and to the electronic switch. The processor receives an output voltage or an output current across the load generating a control signal accordingly. The driver receives the control signal through the coupling element and accordingly changes the ON/OFF state of the electronic switch, regulating the output voltage and the output current via the transformer, where the duration of the ON/OFF state of the electronic switch is determined between the moment control signal changes from negative to positive and the moment it changes from positive to negative to achieve a high-speed load transient response.Type: GrantFiled: March 11, 2019Date of Patent: May 12, 2020Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Tien-Chi Lin, Chih-Yuan Liu, Yung-Chuan Hsu, Pei-Lun Huang
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Patent number: 10630080Abstract: A charger comprises a housing, a first multi-layer printed circuit board (PCB), a second multi-layer PCB, and a third multi-layer PCB. The first PCB comprises at least a portion of a primary side circuit. The second PCB comprises at least a portion of a secondary side circuit. The third PCB is perpendicular to the first PCB and the second PCB. An isolation coupling element is disposed on the third PCB. The isolation coupling element comprises a multi-layer PCB. The first PCB comprises a high voltage (HV) semiconductor package. A surface of a die paddle of the HV semiconductor package is exposed from a molding encapsulation of the HV semiconductor package.Type: GrantFiled: June 28, 2019Date of Patent: April 21, 2020Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Pei-Lun Huang, Yu-Ming Chen, Tien-Chi Lin, Jung-Pei Cheng, Yueh-Ping Yu, Zhi-Qiang Niu, Xiaotian Zhang, Long-Ching Wang
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Publication number: 20190318979Abstract: A charger includes a thermal conductive plate for heat dissipation, and a transistor. The transistor includes a drain terminal of a first pulsating voltage level, and a source terminal of a second pulsating voltage level. The second pulsating voltage level is lower than the first pulsating voltage level. The source terminal is disposed closer to the thermal conductive plate than the drain terminal.Type: ApplicationFiled: April 14, 2018Publication date: October 17, 2019Applicant: Alpha and Omega Semiconductor (Cayman) Ltd.Inventors: Yu-Ming Chen, Tien-Chi Lin, GUAN-YU Lin, TIN-WEI Chen
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Publication number: 20190207528Abstract: A constant on-time isolated converter comprises a transformer with a primary side and a secondary side. The primary side is connected to an electronic switch and secondary-side is connected to a load and a processor. The processor is connected to a driver on primary side through at least one coupling element and to the electronic switch. The processor receives an output voltage or an output current across the load generating a control signal accordingly. The driver receives the control signal through the coupling element and accordingly changes the ON/OFF state of the electronic switch, regulating the output voltage and the output current via the transformer, where the duration of the ON/OFF state of the electronic switch is determined between the moment control signal changes from negative to positive and the moment it changes from positive to negative to achieve a high-speed load transient response.Type: ApplicationFiled: March 11, 2019Publication date: July 4, 2019Applicant: Alpha and Omega Semiconductor (Cayman) Ltd.Inventors: Tien-Chi Lin, Chih-Yuan Liu, Yung-Chuan Hsu, Pei-Lun Huang
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Patent number: 10270353Abstract: A constant on-time isolated converter comprising a transformer is disclosed. The transformer primary side connects to an electronic switch and secondary-side connects to a load and a processor. The processor connects to a driver on primary side through at least one coupling element and to the electronic switch. The processor receives an output voltage or an output current across the load generating a control signal. The driver receives control signal through the coupling element and accordingly changes the electronic switch ON/OFF state, regulating output voltage and current via the transformer, where the electronic switch ON/OFF duration is determined between the moment control signal changes from negative to positive and the moment it changes from positive to negative to achieve a high-speed response to load transient.Type: GrantFiled: December 7, 2014Date of Patent: April 23, 2019Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Tien-Chi Lin, Chih-Yuan Liu, Yung-Chuan Hsu, Pei-Lun Huang
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Publication number: 20190051441Abstract: A voltage converter comprises a second controller as a power switch of the secondary side of the transformer for comparing a detection voltage representing an output voltage and/or load current with a first reference voltage and generating a control signal, and a coupling element for transmitting the control signal generated by the second controller to the first controller on the primary side of the transformer enabling the first controller to generate a first pulse signal driving the power switch to control the on/off state of the primary side winding.Type: ApplicationFiled: October 5, 2018Publication date: February 14, 2019Applicant: Alpha and Omega Semiconductor (Cayman) Ltd.Inventors: Tien-Chi Lin, Yu-Ming Chen, Jung-Pei Cheng, Pei-Lun Huang
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Patent number: 10157702Abstract: A voltage converter comprises a second controller as a power switch of the secondary side of the transformer for comparing a detection voltage representing an output voltage and/or load current with a first reference voltage and generating a control signal, and a coupling element for transmitting the control signal generated by the second controller to the first controller on the primary side of the transformer enabling the first controller to generate a first pulse signal driving the power switch to control the on/off state of the primary side winding.Type: GrantFiled: August 18, 2016Date of Patent: December 18, 2018Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Tien-Chi Lin, Yu-Ming Chen, Jung-Pei Cheng, Pei-Lun Huang