Patents by Inventor Qian Fang
Qian Fang 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: 20240100042Abstract: Provided are a brucine gel plaster and a preparation method therefor. The brucine gel plaster comprises, calculated by weight percentage, 0.3%-2% of brucine, 3%-10% of a framework material, 20%-50% of a humectant and a co-solvent, 0.1%-2% of a crosslinking agent and a crosslinking regulator, and the balance of water, as well as a backing layer and an anti-adhesive layer. The brucine gel plaster uses simple medicinal excipients, does not use a transdermal enhancer, has good skin compatibility, is moisturizing and breathable, is non-irritating to the skin and mucous membranes, has a large drug load, and can be applied to repeatedly. The plaster is used for treating or ameliorating related diseases requiring anti-inflammation and analgesia such as osteoarthritis, rheumatic arthritis and rheumatoid arthritis.Type: ApplicationFiled: November 19, 2021Publication date: March 28, 2024Inventors: Jie HU, Chunmei XUE, Qian ZHAO, Mifen FANG
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Publication number: 20240053245Abstract: Aspects of the subject technology relate to systems, methods, and computer-readable media for identifying a relative permeability of a core sample through a computerized representation of a pore structure of the sample. Specifically, a computerized representation of a three-dimensional (3D) pore structure of a core sample can be accessed. A relative permeability of oil through the 3D pore structure can be determined in three dimensions. Further, a relative permeability of water through the 3D pore structure can be determined in the three dimensions. Average relative permeabilities of oil and water of the 3D pore structure can be identified based on the relative permeability of the oil in the three dimensions and the relative permeability of the water in the three dimensions.Type: ApplicationFiled: March 22, 2023Publication date: February 15, 2024Applicant: Halliburton Energy Services, Inc.Inventors: Xiaobo NIE, Jonas TOELKE, Qian FANG
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Publication number: 20230283165Abstract: Controller and method for a power converter. For example, a controller for a power converter includes: a first drive signal generator configured to generate a first drive signal and output the first drive signal to a first transistor configured to receive an input voltage and related to a primary winding coupled to an auxiliary winding and a secondary winding related to an output voltage; a second drive signal generator configured to generate a second drive signal and output the second drive signal to a second transistor coupled to the first transistor and related to the primary winding; a demagnetization detector configured to generate a demagnetization signal based at least in part on a first voltage related to the auxiliary winding, the demagnetization signal indicating an end of a demagnetization process; and a first controller configured to generate a first control signal.Type: ApplicationFiled: March 6, 2023Publication date: September 7, 2023Inventors: QIAN FANG, YUN SUN, LIEYI FANG
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Publication number: 20230180364Abstract: System and method for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer. For example, the system for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer includes: a first current controller configured to receive a rectified voltage generated by a rectifier that directly receives an AC input voltage without through any TRIAC dimmer; and a second current controller configured to: control a light emitting diode current flowing through one or more light emitting diodes that receive the rectified voltage not clipped by any TRIAC dimmer; and generate a sensing voltage based at least in part upon the light emitting diode current, the sensing voltage representing the light emitting diode current in magnitude.Type: ApplicationFiled: November 9, 2022Publication date: June 8, 2023Inventors: LIQIANG ZHU, QIAN FANG, ZHILIN FAN, KE LI
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Patent number: 11652410Abstract: Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed in response to the drive signal during the on-time period. The switch is opened in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. One minus the duty cycle is equal to a parameter. The system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant.Type: GrantFiled: September 18, 2020Date of Patent: May 16, 2023Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Qian Fang, Cong Lan, Lieyi Fang
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Publication number: 20230099279Abstract: System and method for controlling turning on a first transistor and turning off a second transistor. For example, a system for controlling turning on a first transistor and turning off a second transistor includes: a logic signal generator configured to: process information associated with a first voltage related to a second voltage of a first auxiliary winding, the first auxiliary winding being coupled to a primary winding, a secondary winding, and a second auxiliary winding; generate a third voltage based on at least information associated with the first voltage, the third voltage indicating a first voltage difference from a drain terminal to a source terminal of a first transistor related to the primary winding; process information associated with the third voltage and a reference voltage; and change a logic signal from a first logic level to a second logic level.Type: ApplicationFiled: September 21, 2022Publication date: March 30, 2023Inventors: Qian Fang, Yun Sun, Penglin Yang, Yuan Lin
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Publication number: 20220416643Abstract: Controller and method for a power converter. For example, a controller for a power converter includes: a feedback detector configured to receive a feedback voltage, sample the feedback voltage, and generate a sampled voltage based at least in part on the feedback voltage, the sampled voltage being associated with one or more fluctuations in magnitude; a resistor selector configured to receive the sampled voltage and generate one or more control signals based at least in part on the one or more fluctuations associated with the sampled voltage; a variable resistor network configured to receive the one or more control signals, determine a network resistance based at least in part on the one or more control signals, and output a compensation voltage based at least in part on the network resistance; and a voltage generator connected to the variable resistor network and configured to receive the compensation voltage.Type: ApplicationFiled: June 14, 2022Publication date: December 29, 2022Inventors: Qian Fang, Yaozhang Chen, Liqiang Zhu
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Patent number: 11540371Abstract: System and method for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer. For example, the system for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer includes: a first current controller configured to receive a rectified voltage generated by a rectifier that directly receives an AC input voltage without through any TRIAC dimmer; and a second current controller configured to: control a light emitting diode current flowing through one or more light emitting diodes that receive the rectified voltage not clipped by any TRIAC dimmer; and generate a sensing voltage based at least in part upon the light emitting diode current, the sensing voltage representing the light emitting diode current in magnitude.Type: GrantFiled: April 9, 2021Date of Patent: December 27, 2022Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Liqiang Zhu, Qian Fang, Zhilin Fan, Ke Li
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Publication number: 20210321501Abstract: System and method for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer. For example, the system for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer includes: a first current controller configured to receive a rectified voltage generated by a rectifier that directly receives an AC input voltage without through any TRIAC dimmer; and a second current controller configured to: control a light emitting diode current flowing through one or more light emitting diodes that receive the rectified voltage not clipped by any TRIAC dimmer; and generate a sensing voltage based at least in part upon the light emitting diode current, the sensing voltage representing the light emitting diode current in magnitude.Type: ApplicationFiled: April 9, 2021Publication date: October 14, 2021Inventors: Liqiang Zhu, Qian Fang, Zhilin Fan, Ke Li
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Patent number: 11025170Abstract: Power converter and method thereof according to certain embodiments. For example, the power converter includes a primary winding, and a secondary winding coupled to the primary winding. Additionally, the power converter includes a first switch including a first switch terminal, a second switch terminal, and a third switch terminal. The first switch is configured to affect a first current associated with the primary winding. The first switch terminal corresponds to a first voltage, and the second switch terminal corresponds to a second voltage. The first voltage minus the second voltage is equal to a voltage difference. Moreover, the power converter includes a second switch including a fourth switch terminal, a fifth switch terminal, and a sixth switch terminal and configured to affect a second current associated with the secondary winding.Type: GrantFiled: April 15, 2019Date of Patent: June 1, 2021Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Qian Fang, Huawei Lv, Zhiliang Chen
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Publication number: 20210075319Abstract: Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed in response to the drive signal during the on-time period. The switch is opened in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. One minus the duty cycle is equal to a parameter. The system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant.Type: ApplicationFiled: September 18, 2020Publication date: March 11, 2021Inventors: Qian Fang, Cong Lan, Lieyi Fang
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Patent number: 10811965Abstract: Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed in response to the drive signal during the on-time period. The switch is opened in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. One minus the duty cycle is equal to a parameter. The system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant.Type: GrantFiled: March 6, 2019Date of Patent: October 20, 2020Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Qian Fang, Cong Lan, Lieyi Fang
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Patent number: 10686373Abstract: Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed in response to the drive signal during the on-time period. The switch is opened in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. One minus the duty cycle is equal to a parameter. The system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant.Type: GrantFiled: November 16, 2017Date of Patent: June 16, 2020Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Qian Fang, Cong Lan, Lieyi Fang
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Patent number: 10680525Abstract: Systems and methods are provided for regulating power conversion systems. A system controller includes: a first controller terminal configured to receive a first signal related to an input signal for a primary winding of a power conversation system; and a second controller terminal configured to output a drive signal to a switch to affect a current flowing through the primary winding, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed (e.g., being turned on) in response to the drive signal during the on-time period. The switch is opened (e.g., being turned off) in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. The system controller is configured to keep a multiplication product of the duty cycle and the duration of the on-time period approximately constant.Type: GrantFiled: February 28, 2019Date of Patent: June 9, 2020Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Qian Fang, Xiangkun Zhai, Lieyi Fang
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Publication number: 20200112255Abstract: Power converter and method thereof according to certain embodiments. For example, the power converter includes a primary winding, and a secondary winding coupled to the primary winding. Additionally, the power converter includes a first switch including a first switch terminal, a second switch terminal, and a third switch terminal. The first switch is configured to affect a first current associated with the primary winding. The first switch terminal corresponds to a first voltage, and the second switch terminal corresponds to a second voltage. The first voltage minus the second voltage is equal to a voltage difference. Moreover, the power converter includes a second switch including a fourth switch terminal, a fifth switch terminal, and a sixth switch terminal and configured to affect a second current associated with the secondary winding.Type: ApplicationFiled: April 15, 2019Publication date: April 9, 2020Inventors: Qian Fang, Huawei Lv, Zhiliang Chen
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Publication number: 20190348919Abstract: Systems and methods are provided for regulating power conversion systems. A system controller includes: a first controller terminal configured to receive a first signal related to an input signal for a primary winding of a power conversation system; and a second controller terminal configured to output a drive signal to a switch to affect a current flowing through the primary winding, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed (e.g., being turned on) in response to the drive signal during the on-time period. The switch is opened (e.g., being turned off) in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. The system controller is configured to keep a multiplication product of the duty cycle and the duration of the on-time period approximately constant.Type: ApplicationFiled: February 28, 2019Publication date: November 14, 2019Inventors: QIAN FANG, Xiangkun Zhai, Lieyi Fang
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Publication number: 20190348914Abstract: Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed in response to the drive signal during the on-time period. The switch is opened in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. One minus the duty cycle is equal to a parameter. The system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant.Type: ApplicationFiled: March 6, 2019Publication date: November 14, 2019Inventors: Qian Fang, Cong Lan, Lieyi Fang
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Patent number: 10432096Abstract: Systems and methods are provided for regulating power conversion systems. A system controller includes: a first controller terminal configured to receive a first signal related to an input signal for a primary winding of a power conversation system; and a second controller terminal configured to output a drive signal to a switch to affect a current flowing through the primary winding, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed (e.g., being turned on) in response to the drive signal during the on-time period. The switch is opened (e.g., being turned off) in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. The system controller is configured to keep a multiplication product of the duty cycle and the duration of the on-time period approximately constant.Type: GrantFiled: November 6, 2017Date of Patent: October 1, 2019Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Qian Fang, Xiangkun Zhai, Lleyi Fang
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Patent number: 10340795Abstract: Systems and methods are provided for regulating a power converter. An example system controller includes: a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period. The switch is closed in response to the drive signal during the on-time period. The switch is opened in response to the drive signal during the off-time period. A duty cycle is equal to a duration of the on-time period divided by a duration of the switching period. One minus the duty cycle is equal to a parameter. The system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant.Type: GrantFiled: March 21, 2018Date of Patent: July 2, 2019Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Qian Fang, Cong Lan, Lieyi Fang
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Patent number: 10320300Abstract: Power converter and method thereof according to certain embodiments. For example, the power converter includes a primary winding, and a secondary winding coupled to the primary winding. Additionally, the power converter includes a first switch including a first switch terminal, a second switch terminal, and a third switch terminal. The first switch is configured to affect a first current associated with the primary winding. The first switch terminal corresponds to a first voltage, and the second switch terminal corresponds to a second voltage. The first voltage minus the second voltage is equal to a voltage difference. Moreover, the power converter includes a second switch including a fourth switch terminal, a fifth switch terminal, and a sixth switch terminal and configured to affect a second current associated with the secondary winding.Type: GrantFiled: September 13, 2016Date of Patent: June 11, 2019Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Qian Fang, Huawei Lv, Zhiliang Chen