Patents by Inventor Po-Wen Hsueh
Po-Wen Hsueh 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: 10819139Abstract: A power supply includes a power converter and a battery. A logic circuit controls division of output of power, between the power converter and the battery, to an output of the power supply.Type: GrantFiled: September 29, 2016Date of Patent: October 27, 2020Assignee: Hewlett Packard Enterprise Development LPInventors: Chung-Ping Ku, Po-Wen Hsueh
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Publication number: 20180090984Abstract: A power supply includes a power converter and a battery. A logic circuit controls division of output of power, between the power converter and the battery, to an output of the power supply.Type: ApplicationFiled: September 29, 2016Publication date: March 29, 2018Inventors: Chung-Ping Ku, Po-Wen Hsueh
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Patent number: 9893561Abstract: A power supply conversion system receives an external power source to supply power to a load. The power supply conversion system includes at least one main power apparatus, at least one auxiliary power apparatus, a main switch, an auxiliary switch, and a control unit. The control unit turns on the main switch to restore the external power source when the control unit detects that the external power source is normally restored, and jointly supply power to the load with the auxiliary power apparatus. Especially, the output voltage of the main power apparatus is greater than the output voltage of the auxiliary power apparatus. In addition, the control unit disconnects the auxiliary power apparatus supplying power to the load when the control unit detects that the main power apparatus completely supplies power to the load.Type: GrantFiled: March 28, 2014Date of Patent: February 13, 2018Assignee: DELTA ELECTRONICS, INC.Inventors: Hsin-Chung Niu, Yuan-Sheng Lee, Po-Wen Hsueh
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Publication number: 20150069842Abstract: A power supply conversion system receives an external power source to supply power to a load. The power supply conversion system includes at least one main power apparatus, at least one auxiliary power apparatus, a main switch, an auxiliary switch, and a control unit. The control unit turns on the main switch to restore the external power source when the control unit detects that the external power source is normally restored, and jointly supply power to the load with the auxiliary power apparatus. Especially, the output voltage of the main power apparatus is greater than the output voltage of the auxiliary power apparatus. In addition, the control unit disconnects the auxiliary power apparatus supplying power to the load when the control unit detects that the main power apparatus completely supplies power to the load.Type: ApplicationFiled: March 28, 2014Publication date: March 12, 2015Applicant: Delta Electronics, Inc.Inventors: Hsin-Chung NIU, Yuan-Sheng LEE, Po-Wen HSUEH
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Patent number: 8922280Abstract: A temperature compensation circuit is adapted to be used in an electronic device including a processing circuit. The temperature compensation circuit includes a thermistor, a compensation capacitor and a compensation diode. The thermistor has two ends, one of which is adapted to be electrically connected to the processing circuit. The compensation capacitor has two ends, one of which is electrically connected to the other one of the two ends of the thermistor. The compensation diode has an anode electrically connected to the other one of the two ends of the compensation capacitor, and a cathode to be grounded. The impedance of the thermistor varies with temperature so as to compensate and stabilize an output of the electronic device.Type: GrantFiled: May 8, 2013Date of Patent: December 30, 2014Assignee: Wistron CorporationInventor: Po Wen Hsueh
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Patent number: 8872591Abstract: A temperature compensation circuit is adapted to be used in an electronic device including a processing circuit. The temperature compensation circuit includes a thermistor, a compensation capacitor and a compensation diode. The thermistor has two ends, one of which is adapted to be electrically connected to the processing circuit. The compensation capacitor has two ends, one of which is electrically connected to the other one of the two ends of the thermistor. The compensation diode has an anode electrically connected to the other one of the two ends of the compensation capacitor, and a cathode to be grounded. The impedance of the thermistor varies with temperature so as to compensate and stabilize an output of the electronic device.Type: GrantFiled: May 8, 2013Date of Patent: October 28, 2014Assignee: Wistron CorporationInventor: Po Wen Hsueh
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Publication number: 20140062600Abstract: A temperature compensation circuit is adapted to be used in an electronic device including a processing circuit. The temperature compensation circuit includes a thermistor, a compensation capacitor and a compensation diode. The thermistor has two ends, one of which is adapted to be electrically connected to the processing circuit. The compensation capacitor has two ends, one of which is electrically connected to the other one of the two ends of the thermistor. The compensation diode has an anode electrically connected to the other one of the two ends of the compensation capacitor, and a cathode to be grounded. The impedance of the thermistor varies with temperature so as to compensate and stabilize an output of the electronic device.Type: ApplicationFiled: May 8, 2013Publication date: March 6, 2014Applicant: Wistron CorporationInventor: Po Wen Hsueh
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Patent number: 8299747Abstract: The present invention relates to a single-stage zero-current switching driving circuit for ultrasonic motor, which comprises: a buck-boost converter and a zero-current switching resonant inverter. The driving circuit according to the present invention integrates the buck-boost converter and the resonant inverter into a single-stage structure, so that the buck-boost converter and the resonant inverter share an active switch and a trigger signal, and therefore, the circuit is simplified and the loss caused by stage switching is reduced. Moreover, the buck-boost converter operates in a discontinuous-conduction mode (DCM), which allows the circuit to have high power factor, and enables the active switch to be capable of zero-current switching (ZCS), so that the loss caused by switching is largely reduced. In the driving circuit according to the present invention, there's no interaction of power between the buck-boost converter and the resonant inverter, so that the two circuits can be analyzed individually.Type: GrantFiled: October 25, 2010Date of Patent: October 30, 2012Assignee: Metal Industries Research & Development CentreInventors: Yao-Ching Hsieh, Cheng-Yen Chen, Jian-Yi Hong, Po-Wen Hsueh
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Publication number: 20110095711Abstract: The present invention relates to a single-stage zero-current switching driving circuit for ultrasonic motor, which comprises: a buck-boost converter and a zero-current switching resonant inverter. The driving circuit according to the present invention integrates the buck-boost converter and the resonant inverter into a single-stage structure, so that the buck-boost converter and the resonant inverter share an active switch and a trigger signal, and therefore, the circuit is simplified and the loss caused by stage switching is reduced. Moreover, the buck-boost converter operates in a discontinuous-conduction mode (DCM), which allows the circuit to have high power factor, and enables the active switch to be capable of zero-current switching (ZCS), so that the loss caused by switching is largely reduced. In the driving circuit according to the present invention, there's no interaction of power between the buck-boost converter and the resonant inverter, so that the two circuits can be analyzed individually.Type: ApplicationFiled: October 25, 2010Publication date: April 28, 2011Applicant: METAL INDUSTRIES RESEARCH & DEVELOPMENT CENTREInventors: YAO-CHING HSIEH, CHENG-YEN CHEN, JIAN-YI HONG, PO-WEN HSUEH
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Patent number: 7855491Abstract: A prestress-adjustable piezoelectric gripping device is provided, in which a prestressing device adjusts a prestressing force applied to a piezoelectric element of a piezoelectric unit on the basis of a feedback signal from a force-sensing unit, so as to adjust the friction between the piezoelectric unit and a gripping unit. By utilizing the deformation of the piezoelectric element to drive the gripping unit many times, the gripping velocity and gripping force of the gripping unit can be controlled, and the prestress-adjustable piezoelectric gripping device of the invention can achieve a long driving displacement while maintaining high precision.Type: GrantFiled: December 30, 2008Date of Patent: December 21, 2010Assignee: Metal Industries Research & Development CenterInventors: Po-Wen Hsueh, Cheng-Yen Chen, Chung-Hsien Lin, Shih-Wei Hsiao, Wu-Sung Yao, Mi-Ching Tsai
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Publication number: 20100109477Abstract: A prestress-adjustable piezoelectric gripping device is provided, in which a prestressing device adjusts a prestressing force applied to a piezoelectric element of a piezoelectric unit on the basis of a feedback signal from a force-sensing unit, so as to adjust the friction between the piezoelectric unit and a gripping unit. By utilizing the deformation of the piezoelectric element to drive the gripping unit many times, the gripping velocity and gripping force of the gripping unit can be controlled, and the prestress-adjustable piezoelectric gripping device of the invention can achieve a long driving displacement while maintaining high precision.Type: ApplicationFiled: December 30, 2008Publication date: May 6, 2010Applicant: METAL INDUSTRIES RESEARCH & DEVELOPMENT CENTREInventors: Po-Wen Hsueh, Cheng-Yen Chen, Chung-Hsien Lin, Shih-Wei Hsiao, Wu-Sung Yao, Mi-Ching Tsai
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Publication number: 20080002982Abstract: A portable communication device includes a case body, a microprocessor, a key set, and a photo module. In this case, the microprocessor is disposed in the case body. The key set is disposed on one surface of the case body, and the photo module is disposed on another surface of the case body. The photo module at least includes a light source and a light sensing element. When the portable communication device moves on a plane, the light sensing element generates a light sensing signal according to the light emitted from the light source. Then, the microprocessor calculates and outputs a displacement signal according to the light sensing signal.Type: ApplicationFiled: December 28, 2006Publication date: January 3, 2008Inventor: Po-Wen Hsueh