Patents by Inventor Lingdong Zhang
Lingdong Zhang 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: 11824924Abstract: A service request message sending method, a distributed database architecture and a computer readable storage medium are disclosed. The method includes: receiving (S101) a service request message, and sending (S102) the service request message to a corresponding storage unit through N tiers of computing nodes, where N is an integer greater than or equal to 2, and the closer the tier is to the storage unit, the larger the number of computing nodes in that tier is.Type: GrantFiled: June 8, 2020Date of Patent: November 21, 2023Assignee: XI'AN ZHONGXING NEW SOFTWARE CO., LTD.Inventors: Jian Sui, Qinyuan Lu, Lingdong Zhang, Wenwen Jing
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Patent number: 11728733Abstract: A multi-input single-output circuit can include: a first circuit module configured to receive a first input voltage source, and including a first power switch; a second circuit module configured to receive a second input voltage source, and including a switching power converter, where the switching power converter comprises a second power switch; and a control circuit configured to control one of the first and second circuit modules to supply power for a load, or to stop supplying power for the load, according to states of the first and second input voltage sources and control parameters of the circuit module that is in operation.Type: GrantFiled: August 5, 2020Date of Patent: August 15, 2023Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Yunliang Ma, Lingdong Zhang
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Publication number: 20220286498Abstract: A service request message sending method, a distributed database architecture and a computer readable storage medium are disclosed. The method includes: receiving (S101) a service request message, and sending (S102) the service request message to a corresponding storage unit through N tiers of computing nodes, where N is an integer greater than or equal to 2, and the closer the tier is to the storage unit, the larger the number of computing nodes in that tier is.Type: ApplicationFiled: June 8, 2020Publication date: September 8, 2022Inventors: Jian SUI, Qinyuan LU, Lingdong ZHANG, Wenwen JING
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Patent number: 11431244Abstract: A capacitor management circuit for a power management circuit, where the power management circuit includes a bidirectional converter having first and second ports, the capacitor management circuit includes a plurality of capacitor modules, and where each capacitor module includes: a switch and a capacitor coupled in series between two terminals of the second port; and a control circuit configured to detect state information of the corresponding capacitor, and to control operation state of the switch, in order to realize independent control of each capacitor.Type: GrantFiled: August 4, 2020Date of Patent: August 30, 2022Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Yunliang Ma, Lingdong Zhang
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Publication number: 20210050776Abstract: A capacitor management circuit for a power management circuit, where the power management circuit includes a bidirectional converter having first and second ports, the capacitor management circuit includes a plurality of capacitor modules, and where each capacitor module includes: a switch and a capacitor coupled in series between two terminals of the second port; and a control circuit configured to detect state information of the corresponding capacitor, and to control operation state of the switch, in order to realize independent control of each capacitor.Type: ApplicationFiled: August 4, 2020Publication date: February 18, 2021Inventors: Yunliang Ma, Lingdong Zhang
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Publication number: 20210050788Abstract: A multi-input single-output circuit can include: a first circuit module configured to receive a first input voltage source, and including a first power switch; a second circuit module configured to receive a second input voltage source, and including a switching power converter, where the switching power converter comprises a second power switch; and a control circuit configured to control one of the first and second circuit modules to supply power for a load, or to stop supplying power for the load, according to states of the first and second input voltage sources and control parameters of the circuit module that is in operation.Type: ApplicationFiled: August 5, 2020Publication date: February 18, 2021Inventors: Yunliang Ma, Lingdong Zhang
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Patent number: 10734826Abstract: A power supply including a bi-directional DC converter and a control method thereof are disclosed herein. The power supply includes first to third terminals, first and second semiconductor switches and a mode switching circuit. The first terminal is electrically coupled to an external power source. The second terminal is electrically coupled to a load. The third terminal is electrically coupled to a battery. The first and second semiconductor switches are electrically coupled in series between the first and second terminals. The mode switching circuit is electrically coupled to the first semiconductor switch, the second semiconductor switch and a bi-directional DC converter, respectively. The bi-directional DC converter is further electrically coupled to an intermediate node between the first semiconductor switch and the second semiconductor switch, and to the third terminal.Type: GrantFiled: February 13, 2019Date of Patent: August 4, 2020Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Chen Zhao, Lingdong Zhang
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Patent number: 10658857Abstract: The present disclosure relates to a power management circuit and a mobile terminal having a first switch for blocking current. The first switch blocks an input of an external power supply in a case that a predetermined load operates in a large current/voltage mode. A bi-directional DC converter boosts a battery voltage and supplies it to the load. Thus, the circuit is simplified and the number of components is reduced for power management.Type: GrantFiled: June 25, 2018Date of Patent: May 19, 2020Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Chen Zhao, Lingdong Zhang
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Publication number: 20190173307Abstract: A power supply including a bi-directional DC converter and a control method thereof are disclosed herein. The power supply includes first to third terminals, first and second semiconductor switches and a mode switching means. The first terminal is electrically coupled to an external power source. The second terminal is electrically coupled to a load. The third terminal is electrically coupled to a battery. The first and second semiconductor switches are electrically coupled in series between the first and second terminals. The mode switching means is electrically coupled to the first semiconductor switch, the second semiconductor switch and a bi-directional DC converter, respectively. The bi-directional DC converter is further electrically coupled to an intermediate node between the first semiconductor switch and the second semiconductor switch, and to the third terminal.Type: ApplicationFiled: February 13, 2019Publication date: June 6, 2019Inventors: Chen Zhao, Lingdong Zhang
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Patent number: 10250057Abstract: A power supply including a bi-directional DC converter and a control method thereof are disclosed herein. The power supply includes first to third terminals, first and second semiconductor switches and a mode switching means. The first terminal is electrically coupled to an external power source. The second terminal is electrically coupled to a load. The third terminal is electrically coupled to a battery. The first and second semiconductor switches are electrically coupled in series between the first and second terminals. The mode switching means is electrically coupled to the first semiconductor switch, the second semiconductor switch and a bi-directional DC converter, respectively. The bi-directional DC converter is further electrically coupled to an intermediate node between the first semiconductor switch and the second semiconductor switch, and to the third terminal.Type: GrantFiled: April 23, 2015Date of Patent: April 2, 2019Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD.Inventors: Chen Zhao, Lingdong Zhang
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Patent number: 10250157Abstract: The present disclosure relates to a synchronous rectification circuit. Operation states of four transistor switches in the synchronous rectification circuit are adjusted in accordance with a detected input voltage signal of the synchronous rectification circuit to achieve synchronous rectification. Moreover, the transistor switches in a rectifier bridge and a switching control circuit are all integrated into a single chip to have an increased integration level, a reduced chip size, and high efficiency. The present disclosure also relates to a switching power supply comprising the above synchronous rectification circuit.Type: GrantFiled: July 3, 2017Date of Patent: April 2, 2019Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD.Inventor: Lingdong Zhang
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Publication number: 20180309313Abstract: The present disclosure relates to a power management circuit and a mobile terminal having a first switch for blocking current. The first switch blocks an input of an external power supply in a case that a predetermined load operates in a large current/voltage mode. A bi-directional DC converter boosts a battery voltage and supplies it to the load. Thus, the circuit is simplified and the number of components is reduced for power management.Type: ApplicationFiled: June 25, 2018Publication date: October 25, 2018Inventors: Chen Zhao, Lingdong Zhang
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Patent number: 9843210Abstract: A method for transmitting data and a wireless charging equipment using the same are disclosed. When the wireless charger transmits data, an output current of the wireless charger is controlled at a preset current value so that there is a higher variation in amplitude of a current or a voltage on an inductive element to thereby enable a signal receiver to demodulate the signal. At the end of data transmission, the output current is resumed consistent with a driving current of the load at the moment. The present disclosure can address the problem of impossible normal communication in the wireless charger at the circumstance of a very low driving current of the load without any increase in cost and complexity of the circuit.Type: GrantFiled: November 19, 2014Date of Patent: December 12, 2017Assignee: Silergy Semiconductor Technology (Hangzhou) Ltd.Inventors: Xuzhen Shen, Lingdong Zhang
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Publication number: 20170302194Abstract: The present disclosure relates to a synchronous rectification circuit. Operation states of four transistor switches in the synchronous rectification circuit are adjusted in accordance with a detected input voltage signal of the synchronous rectification circuit to achieve synchronous rectification. Moreover, the transistor switches in a rectifier bridge and a switching control circuit are all integrated into a single chip to have an increased integration level, a reduced chip size, and high efficiency. The present disclosure also relates to a switching power supply comprising the above synchronous rectification circuit.Type: ApplicationFiled: July 3, 2017Publication date: October 19, 2017Inventor: Lingdong Zhang
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Patent number: 9712078Abstract: The present disclosure relates to a synchronous rectification circuit adapted to an electronic transformer. Operation states of four transistor switches in the synchronous rectification circuit are adjusted in accordance with a detected input voltage signal of the synchronous rectification circuit to achieve synchronous rectification. Moreover, the transistor switches in a rectifier bridge and a switching control circuit are all integrated into a single chip to have an increased integration level, a reduced chip size, and high efficiency. The present disclosure also relates to a switching power supply comprising the above synchronous rectification circuit.Type: GrantFiled: October 23, 2014Date of Patent: July 18, 2017Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD.Inventor: Lingdong Zhang
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Patent number: 9312785Abstract: In one embodiment, a synchronous rectification circuit can include: (i) a sampling circuit configured to sample a voltage across first and second power terminals of a synchronous rectifier, and to generate a first sampling voltage; (ii) an enable controlling circuit configured to delay the first sampling voltage, and to generate a second sampling voltage, and to activate a ramp voltage when the first sampling voltage is higher than the second sampling voltage; (iii) the enable controlling circuit being configured to generate an enable controlling signal in response to a comparison of the ramp voltage against a reference voltage that represents a predetermined light load condition; and (iv) a driving circuit configured to activate a driving signal to turn on the synchronous rectifier when the enable controlling signal and a synchronous rectification open signal are active.Type: GrantFiled: May 2, 2014Date of Patent: April 12, 2016Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventor: Lingdong Zhang
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Patent number: 9287793Abstract: In one embodiment, method of generating a control signal for an isolated power supply, can include: (i) generating a first ground noise component with a first predetermined proportionality to a ground noise signal; (ii) generating a first peak signal based on a first control signal having the ground noise signal, where the first peak signal comprises a second ground noise component with a second predetermined proportionality to the ground noise signal; (iii) generating a second control signal based on a difference between the first peak signal and the first ground noise component; and (iv) controlling, by the second control signal, a switch of the isolated power supply.Type: GrantFiled: May 27, 2014Date of Patent: March 15, 2016Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventors: Lingdong Zhang, Chen Zhao
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Patent number: 9192007Abstract: In one embodiment, a pulse-width modulation (PWM) dimming control method for a light-emitting diode (LED) load, can include: (i) receiving a PWM dimming signal and a clock signal in a control circuit, where the clock signal is used to determine an effective width of the PWM dimming signal; (ii) setting a minimum value of the effective width of the PWM dimming signal; (iii) using the PWM dimming signal as a dimming control signal when the effective width of the PWM dimming signal is greater than the minimum value; (iv) regulating the effective width of the PWM dimming signal as the minimum value, and using the regulated PWM dimming signal as the dimming control signal, when the effective width of the PWM dimming signal is less than the minimum value; and (v) controlling a driving current of the LED load according to the dimming control signal.Type: GrantFiled: December 17, 2014Date of Patent: November 17, 2015Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventor: Lingdong Zhang
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Publication number: 20150311720Abstract: A power supply including a bi-directional DC converter and a control method thereof are disclosed herein. The power supply includes first to third terminals, first and second semiconductor switches and a mode switching means. The first terminal is electrically coupled to an external power source. The second terminal is electrically coupled to a load. The third terminal is electrically coupled to a battery. The first and second semiconductor switches are electrically coupled in series between the first and second terminals. The mode switching means is electrically coupled to the first semiconductor switch, the second semiconductor switch and a bi-directional DC converter, respectively. The bi-directional DC converter is further electrically coupled to an intermediate node between the first semiconductor switch and the second semiconductor switch, and to the third terminal.Type: ApplicationFiled: April 23, 2015Publication date: October 29, 2015Inventors: Chen Zhao, Lingdong Zhang
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Publication number: 20150181670Abstract: In one embodiment, a pulse-width modulation (PWM) dimming control method for a light-emitting diode (LED) load, can include: (i) receiving a PWM dimming signal and a clock signal in a control circuit, where the clock signal is used to determine an effective width of the PWM dimming signal; (ii) setting a minimum value of the effective width of the PWM dimming signal; (iii) using the PWM dimming signal as a dimming control signal when the effective width of the PWM dimming signal is greater than the minimum value; (iv) regulating the effective width of the PWM dimming signal as the minimum value, and using the regulated PWM dimming signal as the dimming control signal, when the effective width of the PWM dimming signal is less than the minimum value; and (v) controlling a driving current of the LED load according to the dimming control signal.Type: ApplicationFiled: December 17, 2014Publication date: June 25, 2015Inventor: Lingdong Zhang