Patents by Inventor Di LUO
Di LUO 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: 20240127194Abstract: Techniques for improving computing device operations are provided. A system can include an organizational database that stores a centralized set of organizational data having a plurality of device objects and a plurality of employee objects. The system can receive a notification associated with the first employee object. Additionally, the system can determine, using the organizational database, that the first device object is associated with the first employee. Moreover, the system can access a device policy for the first device object. Furthermore, the system can evaluate the device policy based at least in part on data associated with the first employee object and the notification. The evaluation of the device policy includes running a query expression against the centralized set of organizational data to return a query result. Subsequently, the system can execute an action based on the query result. The action can be associated with the first computing device.Type: ApplicationFiled: December 22, 2023Publication date: April 18, 2024Inventors: Zaafir Kherani, Di Yang, Xiaochi Luo, Siddhartha Gunda, Kyle Michael Boston, Daniel Robert Buscaglia, Dilanka Theshan Dharmasena
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Publication number: 20230064288Abstract: A control circuit for a switching converter, where: in a first operation state, the control circuit controls a switching period of the switching converter to remain unchanged, controls a turn-on time of a power transistor in the switching converter to be not less than a minimum turn-on time in each switching period, and controls a turn-off time of the power transistor to be not less than a minimum turn-off time; in a second operation state, the control circuit controls the turn-on time of the power transistor to be the minimum turn-on time in each switching period, and adjusts the switching period to further reduce a duty cycle; and in a third operation state, the control circuit controls the turn-off time of the power transistor to be the minimum turn-off time in each switching period, and adjusts the switching period to further increase the duty cycle.Type: ApplicationFiled: August 16, 2022Publication date: March 2, 2023Inventors: Di Luo, Liangwei Sun
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Patent number: 11362984Abstract: The present disclosure discloses a subject matter message notification method performed at a terminal and to be disseminated to one or more target users. The method includes: displaying a subject matter editing interface, the subject matter editing interface including an editing item used for editing subject matter content, an editing item used for adding a target user, and an editing item used for adding a file; generating a subject matter message in accordance with user-provided subject matter content through the editing item used for editing subject matter content, one or more user-selected target users through the editing item used for adding a target user, and one or more user-selected files through the editing item used for adding a file; and sending the subject matter message to a server, wherein the server is configured to send the subject matter message to the one or more user-selected target users.Type: GrantFiled: July 9, 2019Date of Patent: June 14, 2022Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventors: Wentao Wang, Zhixing Chen, Kaikai Shi, Zhiping Han, Si Ye, Xiongzhi Li, Haolong Huang, Muxuan Huang, Jinlin Chen, Feng Liu, Pengfei Zhang, Di Luo, Ao Wei
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Patent number: 11296603Abstract: A mode switching circuit for a switching power supply having a power switch and a synchronous switch is configured to: control the switching power supply to switch between a first mode and a second mode in response to a transitioning of a load of the switching power supply, in order to suppress overshoot of an output voltage of the switching power supply; where an inductor current of the switching power supply is not less than zero in the first mode; and where the inductor current is allowed to be less than zero in the second mode.Type: GrantFiled: May 4, 2020Date of Patent: April 5, 2022Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventor: Di Luo
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Publication number: 20210341987Abstract: The present disclosure provides an information processing method. The method includes obtaining a first parameter of a hardware platform or obtaining a second parameter of a second parameter; and configuring the second parameter of the operating system based on the first parameter of the hardware platform, or configuring the first parameter of the hardware platform based on the second parameter of the operating system to cause a power consumption configuration of the hardware platform itself to match a power consumption configuration of the hardware platform controlled by the hardware platform. The electronic device provided in the present disclosure can enable collaboration and connection between hardware management and software parameters of the operating system, thereby achieving better power-saving effect, and making intelligent adjustment based on the user's usage scenarios and needs.Type: ApplicationFiled: September 27, 2019Publication date: November 4, 2021Inventors: Wei ZHANG, Jianhua SONG, Fan YANG, Anyu ZHANG, Di LUO
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Publication number: 20200366207Abstract: A mode switching circuit for a switching power supply having a power switch and a synchronous switch is configured to: control the switching power supply to switch between a first mode and a second mode in response to a transitioning of a load of the switching power supply, in order to suppress overshoot of an output voltage of the switching power supply; where an inductor current of the switching power supply is not less than zero in the first mode; and where the inductor current is allowed to be less than zero in the second mode.Type: ApplicationFiled: May 4, 2020Publication date: November 19, 2020Inventor: Di Luo
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Patent number: 10566893Abstract: A ZVS (zero voltage switching) control circuit for use in a flyback power converter includes a primary side controller circuit, a secondary side controller circuit, and a pulse transformer. In one switching cycle, a synchronous rectifier transistor is turned ON twice to generate a circulation current at the primary side winding, and after the synchronous rectifier transistor is turned OFF, the power transistor is turned ON for zero voltage switching. A synchronous signal coupled between the primary side and the secondary side is employed to synchronize the power transistor and the synchronous transistor. The synchronous signal also triggers an SR-ZVS pulse to turn ON the synchronous rectifier transistor for achieving the zero voltage switching when the power transistor is turned ON.Type: GrantFiled: September 18, 2018Date of Patent: February 18, 2020Assignee: RICHTEK TECHNOLOGY CORPORATIONInventors: Ta-Yung Yang, Tzu-Chen Lin, Li-Di Luo, Pei-Sheng Tsu
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Publication number: 20190334854Abstract: The present disclosure discloses a subject matter message notification method performed at a terminal and to be disseminated to one or more target users. The method includes: displaying a subject matter editing interface, the subject matter editing interface including an editing item used for editing subject matter content, an editing item used for adding a target user, and an editing item used for adding a file; generating a subject matter message in accordance with user-provided subject matter content through the editing item used for editing subject matter content, one or more user-selected target users through the editing item used for adding a target user, and one or more user-selected files through the editing item used for adding a file; and sending the subject matter message to a server, wherein the server is configured to send the subject matter message to the one or more user-selected target users.Type: ApplicationFiled: July 9, 2019Publication date: October 31, 2019Inventors: Wentao WANG, Zhixing CHEN, Kaikai SHI, Zhiping HAN, Si YE, Xiongzi LI, Haolong HUANG, Muxuan HUANG, Jinlin CHEN, Feng LIU, Pengfel ZHANG, Di LUO, Ao WEI
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Patent number: 10397177Abstract: The present disclosure discloses a subject matter message notification method performed at a terminal and to be disseminated to one or more target users. The method includes: displaying a subject matter editing interface, the subject matter editing interface including an editing item used for editing subject matter content, an editing item used for adding a target user, and an editing item used for adding a file; generating a subject matter message in accordance with user-provided subject matter content through the editing item used for editing subject matter content, one or more user-selected target users through the editing item used for adding a target user, and one or more user-selected files through the editing item used for adding a file; and sending the subject matter message to a server, wherein the server is configured to send the subject matter message to the one or more user-selected target users.Type: GrantFiled: September 30, 2017Date of Patent: August 27, 2019Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITEDInventors: Wentao Wang, Zhixing Chen, Kaikai Shi, Zhiping Han, Si Ye, Xiongzhi Li, Haolong Huang, Muxuan Huang, Jinlin Chen, Feng Liu, Pengfei Zhang, Di Luo, Ao Wei
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Patent number: 10348206Abstract: Controlling a switching power supply can include: generating a ramp signal having an amplitude that follows an output feedback signal of the switching power supply; and controlling a switching state of a main power transistor in the switching power supply to be switched when the ramp signal reaches a peak value such that an output signal of the switching power supply is maintained as substantially constant.Type: GrantFiled: May 11, 2018Date of Patent: July 9, 2019Assignee: Silergy Semiconductor Technology (Hangzhou) LTDInventor: Di Luo
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Publication number: 20190149032Abstract: A ZVS (zero voltage switching) control circuit for use in a flyback power converter includes a primary side controller circuit, a secondary side controller circuit, and a pulse transformer. In one switching cycle, a synchronous rectifier transistor is turned ON twice to generate a circulation current at the primary side winding, and after the synchronous rectifier transistor is turned OFF, the power transistor is turned ON for zero voltage switching. A synchronous signal coupled between the primary side and the secondary side is employed to synchronize the power transistor and the synchronous transistor. The synchronous signal also triggers an SR-ZVS pulse to turn ON the synchronous rectifier transistor for achieving the zero voltage switching when the power transistor is turned ON.Type: ApplicationFiled: September 18, 2018Publication date: May 16, 2019Inventors: Ta-Yung Yang, Tzu-Chen Lin, Li-Di Luo, Pei-Sheng Tsu
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Publication number: 20180337605Abstract: Controlling a switching power supply can include: generating a ramp signal having an amplitude that follows an output feedback signal of the switching power supply; and controlling a switching state of a main power transistor in the switching power supply to be switched when the ramp signal reaches a peak value such that an output signal of the switching power supply is maintained as substantially constant.Type: ApplicationFiled: May 11, 2018Publication date: November 22, 2018Inventor: Di Luo
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Patent number: 10014786Abstract: A flyback power converter includes a transformer, a power switch, a power switch control circuit, a synchronous rectification (SR) switch, an SR switch control circuit, and a signal coupler circuit. The signal coupler circuit includes a primary port and a secondary port, wherein the primary port is electrically connected to the power switch control circuit, and the secondary port is electrically connected to the SR switch control circuit. The primary port and the secondary port receive different signals generated by the power switch control circuit and the SR switch control circuit respectively, and the signal coupler circuit senses and converts the different signals to generate corresponding converted signals at the secondary port and the primary port respectively in different and non-overlapping time periods, without direct contact or direct connection between the primary side and the secondary side of the transformer.Type: GrantFiled: November 10, 2017Date of Patent: July 3, 2018Assignee: RICHTEK TECHNOLOGY CORPORATIONInventors: Ta-Yung Yang, Tzu-Chen Lin, Bing Zeng, Li-Di Luo
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Publication number: 20180138818Abstract: A flyback power converter includes a transformer, a power switch, a power switch control circuit, a synchronous rectification (SR) switch, an SR switch control circuit, and a signal coupler circuit. The signal coupler circuit includes a primary port and a secondary port, wherein the primary port is electrically connected to the power switch control circuit, and the secondary port is electrically connected to the SR switch control circuit. The primary port and the secondary port receive different signals generated by the power switch control circuit and the SR switch control circuit respectively, and the signal coupler circuit senses and converts the different signals to generate corresponding converted signals at the secondary port and the primary port respectively in different and non-overlapping time periods, without direct contact or direct connection between the primary side and the secondary side of the transformer.Type: ApplicationFiled: November 10, 2017Publication date: May 17, 2018Inventors: Ta-Yung Yang, Tzu-Chen Lin, Bing Zeng, Li-Di Luo
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Publication number: 20180026932Abstract: The present disclosure discloses a subject matter message notification method performed at a terminal and to be disseminated to one or more target users. The method includes: displaying a subject matter editing interface, the subject matter editing interface including an editing item used for editing subject matter content, an editing item used for adding a target user, and an editing item used for adding a file; generating a subject matter message in accordance with user-provided subject matter content through the editing item used for editing subject matter content, one or more user-selected target users through the editing item used for adding a target user, and one or more user-selected files through the editing item used for adding a file; and sending the subject matter message to a server, wherein the server is configured to send the subject matter message to the one or more user-selected target users.Type: ApplicationFiled: September 30, 2017Publication date: January 25, 2018Inventors: Wentao WANG, Zhixing CHEN, Kaikai SHI, Zhiping HAN, Si YE, Xiongzhi LI, Haolong HUANG, Muxuan HUANG, Jinlin CHEN, Feng LIU, Pengfei ZHANG, Di LUO, Ao WEI
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Patent number: 9755530Abstract: The present invention discloses a power converter with synchronous control function and control method thereof. The power converter includes: a transformer, a power switch, a switch control unit, a signal coupling circuit, a synchronous rectifying switch and a secondary side control circuit. The switch control unit generates an operation signal according to a feedback signal, and generates a first synchronous signal which is related to the operation signal. The signal coupling circuit couples the first synchronous signal to generate a second synchronous signal. The synchronous rectifying switch is turned ON/OFF according to a synchronous rectifying switch signal, for synchronous rectification. The secondary side control circuit generates the synchronous rectifying switch signal according to a secondary side level detection signal and the second synchronous signal, to control the synchronous rectifying switch. The ON time of the power switch and the ON time of the synchronous rectifying switch do not overlap.Type: GrantFiled: May 2, 2016Date of Patent: September 5, 2017Assignee: RICHTEK TECHNOLOGY CORPORATIONInventors: Li-Di Luo, Yu-Kai Chen, Yu-Chang Chen
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Patent number: 9755529Abstract: The present invention provides a flyback power converter and a control circuit thereof. The flyback power converter includes a transformer, a power switch, a driver, a synchronous rectification (SR) switch, a controller, and a signal coupler circuit. The transformer has a primary winding and a secondary winding. The power switch controls the conduction time of the primary winding; and the SR switch controls the conduction time of the secondary winding. The controller controls the SR switch and generates an ON pulse signal and an OFF pulse signal in a normal operation mode. When an output voltage reaches a lower limit voltage, the flyback power converter operates in the normal operation mode. The driver generates a switching signal according to the ON pulse signal and the OFF pulse signal in the normal operation mode, to determine a start conduction time point and an end conduction time point of the primary winding.Type: GrantFiled: May 5, 2016Date of Patent: September 5, 2017Assignee: RICHTEK TECHNOLOGY CORPORATIONInventors: Yu-Chang Chen, Li-Di Luo, Tzu-Chen Lin
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Patent number: 9601983Abstract: The present invention provides a flyback power converter and a control circuit and a control method thereof. The flyback power converter includes: a power stage circuit, a voltage sense circuit, a current sense circuit, and a control circuit. When the flyback power converter operates in a quasi-resonant mode, the control circuit determines a time point of turning OFF a power switch in the power stage circuit according to a current sense signal, a pulse width modulation (PWM) frequency of a PWM signal, and a predetermined threshold, wherein the control circuit adaptively adjusts an ON period of the power switch, or adaptively adjusts an operation bandwidth or an amplifier gain of an error amplifier circuit in a feedback control loop according to the PWM frequency to mitigate an output voltage ripple.Type: GrantFiled: April 20, 2015Date of Patent: March 21, 2017Assignee: RICHTEK TECHNOLOGY CORPORATIONInventors: Kuang-Fu Chang, Tzu-Chen Lin, Li-Di Luo
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Publication number: 20160344296Abstract: The present invention discloses a power converter with synchronous control function and control method thereof. The power converter includes: a transformer, a power switch, a switch control unit, a signal coupling circuit, a synchronous rectifying switch and a secondary side control circuit. The switch control unit generates an operation signal according to a feedback signal, and generates a first synchronous signal which is related to the operation signal. The signal coupling circuit couples the first synchronous signal to generate a second synchronous signal. The synchronous rectifying switch is turned ON/OFF according to a synchronous rectifying switch signal, for synchronous rectification. The secondary side control circuit generates the synchronous rectifying switch signal according to a secondary side level detection signal and the second synchronous signal, to control the synchronous rectifying switch. The ON time of the power switch and the ON time of the synchronous rectifying switch do not overlap.Type: ApplicationFiled: May 2, 2016Publication date: November 24, 2016Inventors: Li-Di Luo, Yu-Kai Chen, Yu-Chang Chen
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Publication number: 20160329819Abstract: The present invention provides a flyback power converter and a control circuit thereof. The flyback power converter includes a transformer, a power switch, a driver, a synchronous rectification (SR) switch, a controller, and a signal coupler circuit. The transformer has a primary winding and a secondary winding. The power switch controls the conduction time of the primary winding; and the SR switch controls the conduction time of the secondary winding. The controller controls the SR switch and generates an ON pulse signal and an OFF pulse signal in a normal operation mode. When an output voltage reaches a lower limit voltage, the flyback power converter operates in the normal operation mode. The driver generates a switching signal according to the ON pulse signal and the OFF pulse signal in the normal operation mode, to determine a start conduction time point and an end conduction time point of the primary winding.Type: ApplicationFiled: May 5, 2016Publication date: November 10, 2016Inventors: Yu-Chang Chen, Li-Di Luo, Tzu-Chen Lin