Patents by Inventor Chenming Wu
Chenming Wu 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: 20230207767Abstract: A light-emitting device includes a semiconductor structure, a through hole, an electrical connecting structure, and a first electrode metal layer. The semiconductor structure has a first surface and a second surface, and includes a first-type semiconductor layer, a second-type semiconductor layer, and an active layer. The first surface is located on the first-type semiconductor layer, and the second surface is located on the second-type semiconductor layer. The through hole passes through the first-type semiconductor layer, the second-type semiconductor layer, and the active layer. The through hole has a first section, and the first-type semiconductor layer is exposed through the first section to electrically connect with the electrical connecting structure. A first angle between a side wall of the first type semiconductor layer that bounds the first section and the plane of the first surface ranges from 0° to 90°.Type: ApplicationFiled: February 23, 2023Publication date: June 29, 2023Inventors: Si ZHANG, Shuili YU, Chenming WU, Kunte LIN, Huan-Shao KUO, Jiansheng QIU
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Publication number: 20140055061Abstract: A battery-powered load control device (e.g., a motorized window treatment) is able to supply a pulse-width modulated current to an electrical load (e.g., a motor) while conducting a substantially DC battery current from a battery powering the motorized window treatment. The motorized window treatment includes a motor drive circuit for driving the motor with a pulse-width modulated signal to adjust the rotational speed of the motor, such that the motor conducts the pulse-with modulated current. The motorized window treatment also has an input circuit coupled between the battery and the H-bridge drive circuit. The input circuit has an output for conducting the pulse-width modulated load current, and conducts the substantially DC battery current from the battery. The input circuit may comprise, for example, a passive filter circuit (such as an inductor-capacitor filter) or an active circuit (such as a power converter).Type: ApplicationFiled: March 15, 2013Publication date: February 27, 2014Applicant: LUTRON ELECTRONICS CO., INC.Inventors: Samuel F. Chambers, Peter W. Ogden, Jr., Jonathan L. Roe, Chenming Wu
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Patent number: 7859815Abstract: An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collected in both two and three wire installations. Both zero cross detectors are monitored and are used to automatically configure the electronic control. Over voltage circuitry senses an over voltage condition across a MOSFET which is in the off state and turns the MOSFET on so that it desirably will not reach the avalanche region. Over current circuitry senses when the current through the MOSFETs has exceeded a predetermined current threshold and then turns the MOSFETs off so they do not exceed the MOSFETs' safe operating area (SOA) curve. Latching circuitry is employed to keep the protection circuitry in effect even after a fault condition has cleared.Type: GrantFiled: April 5, 2010Date of Patent: December 28, 2010Assignee: Lutron Electronics Co., Inc.Inventors: Richard L Black, Benjamin Aaron Johnson, Shawn L. Leichliter, Robert C. Newman, Jr., Chenming Wu
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Publication number: 20100231055Abstract: An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collected in both two and three wire installations. Both zero cross detectors are monitored and are used to automatically configure the electronic control. Over voltage circuitry senses an over voltage condition across a MOSFET which is in the off state and turns the MOSFET on so that it desirably will not reach the avalanche region. Over current circuitry senses when the current through the MOSFETs has exceeded a predetermined current threshold and then turns the MOSFETs off so they do not exceed the MOSFETs' safe operating area (SOA) curve. Latching circuitry is employed to keep the protection circuitry in effect even after a fault condition has cleared.Type: ApplicationFiled: April 5, 2010Publication date: September 16, 2010Applicant: LUTRON ELECTRONICS CO., INC.Inventors: Richard L. Black, Benjamin Aaron Johnson, Shawn L. Leichliter, Robert C. Newman, JR., Chenming Wu
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Patent number: 7005762Abstract: An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collected in both two and three wire installations. Both zero cross detectors are monitored and are used to automatically configure the electronic control. Over voltage circuitry senses an over voltage condition across a MOSFET which is in the off state and turns the MOSFET on so that it desirably will not reach the avalanche region. Over current circuitry senses when the current through the MOSFETs has exceeded a predetermined current threshold and then turns the MOSFETs off so they do not exceed the MOSFETs' safe operating area (SOA) curve. Latching circuitry is employed to keep the protection circuitry in effect even after a fault condition has cleared.Type: GrantFiled: April 8, 2003Date of Patent: February 28, 2006Assignee: Lutron Electronics Co., Inc.Inventors: Richard L. Black, Graham Christensen, Benjamin Aaron Johnson, Shawn L. Leichliter, Robert C. Newman, Jr., Stephen Spencer Thompson, Chenming Wu
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Patent number: 6969959Abstract: An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collected in both two and three wire installations. Both zero cross detectors are monitored and are used to automatically configure the electronic control. Over voltage circuitry senses an over voltage condition across a MOSFET which is in the off state and turns the MOSFET on so that it desirably will not reach the avalanche region. Over current circuitry senses when the current through the MOSFETs has exceeded a predetermined current threshold and then turns the MOSFETs off so they do not exceed the MOSFETs' safe operating area (SOA) curve. Latching circuitry is employed to keep the protection circuitry in effect even after a fault condition has cleared.Type: GrantFiled: December 10, 2001Date of Patent: November 29, 2005Assignee: Lutron Electronics Co., Inc.Inventors: Richard L. Black, Graham Christensen, Benjamin Aaron Johnson, Shawn L. Leichliter, Robert C. Newman, Jr., Stephen Spencer Thompson, Chenming Wu
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Patent number: 6720744Abstract: An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collected in both two and three wire installations. Both zero cross detectors are monitored and are used to automatically configure the electronic control. Over voltage circuitry senses an over voltage condition across a MOSFET which is in the off state and turns the MOSFET on so that it desirably will not reach the avalanche region. Over current circuitry senses when the current through the MOSFETs has exceeded a predetermined current threshold and then turns the MOSFETs off so they do not exceed the MOSFETs' safe operating area (SOA) curve. Latching circuitry is employed to keep the protection circuitry in effect even after a fault condition has cleared.Type: GrantFiled: December 10, 2001Date of Patent: April 13, 2004Assignee: Lutron Electronics Co., Inc.Inventors: Richard L. Black, Graham Christensen, Benjamin Aaron Johnson, Shawn L. Leichliter, Robert C. Newman, Jr., Stephen Spencer Thompson, Chenming Wu
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Publication number: 20030178892Abstract: An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collected in both two and three wire installations. Both zero cross detectors are monitored and are used to automatically configure the electronic control. Over voltage circuitry senses an over voltage condition across a MOSFET which is in the off state and turns the MOSFET on so that it desirably will not reach the avalanche region. Over current circuitry senses when the current through the MOSFETs has exceeded a predetermined current threshold and then turns the MOSFETs off so they do not exceed the MOSFETs' safe operating area (SOA) curve. Latching circuitry is employed to keep the protection circuitry in effect even after a fault condition has cleared.Type: ApplicationFiled: April 8, 2003Publication date: September 25, 2003Inventors: Richard L. Black, Graham Christensen, Benjamin Aaron Johnson, Shawn L. Leichliter, Robert C. Newman, Stephen Spencer Thompson, Chenming Wu
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Publication number: 20030006710Abstract: An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collected in both two and three wire installations. Both zero cross detectors are monitored and are used to automatically configure the electronic control. Over voltage circuitry senses an over voltage condition across a MOSFET which is in the off state and turns the MOSFET on so that it desirably will not reach the avalanche region. Over current circuitry senses when the current through the MOSFETs has exceeded a predetermined current threshold and then turns the MOSFETs off so they do not exceed the MOSFETs' safe operating area (SOA) curve. Latching circuitry is employed to keep the protection circuitry in effect even after a fault condition has cleared.Type: ApplicationFiled: December 10, 2001Publication date: January 9, 2003Inventors: Richard L. Black, Graham Christensen, Benjamin Aaron Johnson, Shawn L. Leichliter, Robert C. Newman, Stephen Spencer Thompson, Chenming Wu