Patents by Inventor Zhi Quan
Zhi Quan 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: 10757785Abstract: A load driver for driving a load and an LED module are disclosed. In one embodiment, the load driver comprises a converter circuit comprising a controllable switching element configured to be turned on and off and to perform power factor correction for power from a power supply to the load, wherein a control terminal of the controllable switching element is configured for receiving a startup current via the two output terminals, the controllable switching element configured to be turned on by the startup current. The converter circuit further comprises a first inductor, coupled to the power supply at a first end, and to ground at a second end via the controllable switching element, wherein a first one of the output terminals connects to a second end of the first inductor via a diode forwarded from the first inductor, a second one of the output terminals is coupled to the first end of the first inductor.Type: GrantFiled: March 30, 2015Date of Patent: August 25, 2020Assignee: SIGNIFY HOLDING B.V.Inventors: Zhi Quan Chen, Duo L. Li, Kang Li, Matt J. Ma, Hui Zhang, Dennis Johannes Antonius Claessens
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Publication number: 20200146123Abstract: A retrofit Light Emitting Diode, LED, tube for connecting to a High Frequency, HF, ballast, which LED tube comprises a switchable capacitor arrangement for ensuring that the ballast does not go into over current protection mode, wherein the switching is controlled based on a desired dimming level of the LED tube. The switchable capacitor arrangement is provided in parallel with said input of said rectifier, and comprises at least a first capacitor and a second capacitor in series, and said control circuit is adapted to configure said switchable capacitor arrangement to conduct the AC power and switch at least one of the first capacitor and the second capacitor between the rectifier and the LED array to block the DC power to said LED array.Type: ApplicationFiled: April 18, 2018Publication date: May 7, 2020Inventors: ZHI QUAN CHEN, XIANHUI ZHANG, HAIMIN TAO
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Publication number: 20200068678Abstract: There is proposed an interface circuit for connecting an electronic ballast to a lighting arrangement, in which control of a coupling configuration of the interface circuit is dependent upon a frequency of the electronic ballast. In particular, a coupling configuration of the interface circuit is controlled by a control arrangement based on the ballast frequency.Type: ApplicationFiled: March 1, 2018Publication date: February 27, 2020Inventors: XIANHUI ZHANG, DEREK ZHENG, ZHI QUAN CHEN, HUOJUN LONG, WEN RAN, HAIMIN TAO
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Patent number: 10537010Abstract: The invention describes a coded light modulation arrangement (1), adapted to be connected between a driver (31) and a LED (3), which coded light modulation arrangement (1) comprises input terminals (10) adapted to connect to the driver (31) and to receive a drive current (IDRIVE), an energy storage arrangement comprising a number of energy storage devices (E1, E2); a data input interface (12) realized to receive a data stream (D), said data stream (D) comprises a sequence of binary symbols comprising a logic high and a logic low; a switch arrangement comprising a number of switches (S1, S2) arranged to connect the energy storage devices (E1, E2) of the energy storage arrangement and to modulate the drive current such that, in a charging switch configuration corresponding to the logic low, a negative modulation current (INEG) is diverted from a drive current (IDRIVE) of the LED (3) to the energy storage arrangement; and, in a discharging switch configuration corresponding to the logic high, a positive modulatiType: GrantFiled: November 28, 2016Date of Patent: January 14, 2020Assignee: SIGNIFY HOLDING B.V.Inventors: Junhu Liu, Zhi Quan Chen, Biwen Xu, Gang G. Wang, Gang K. Wang
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Publication number: 20190394132Abstract: A computing system and a method are provided for determining a network traffic routing path through a service function chain (SFC). A joint network slicing and traffic engineering problem is provided that may be solved to identify network slicing configuration and traffic engineering parameters to provide a set of function nodes, the SFC, and the network traffic routing path from the source node to the destination node. The joint network slicing and traffic engineering problem P may be solved by minimizing a resource objective associated with the joint network slicing and traffic engineering problem, in accordance with a set of one or more constraints. Instructions may be transmitted to a network orchestrator to create the service function chain in a network slice on the set of network nodes in accordance with the identified network slicing configuration and traffic engineering parameters, to provide the network traffic routing path.Type: ApplicationFiled: August 30, 2019Publication date: December 26, 2019Inventors: Nan Zhang, Ya-Feng Liu, Hamidreza Farmanbar, Tsung-Hui Chang, Mingyi Hong, Zhi-Quan Luo
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Publication number: 20190342979Abstract: The invention describes a coded light modulation arrangement (1), adapted to be connected between a driver (31) and a LED (3), which coded light modulation arrangement (1) comprises input terminals (10) adapted to connect to the driver (31) and to receive a drive current (IDRIVE), an energy storage arrangement comprising a number of energy storage devices (E1, E2); a data input interface (12) realized to receive a data stream (D), said data stream (D) comprises a sequence of binary symbols comprising a logic high and a logic low; a switch arrangement comprising a number of switches (S1, S2) arranged to connect the energy storage devices (E1, E2) of the energy storage arrangement and to modulate the drive current such that, in a charging switch configuration corresponding to the logic low, a negative modulation current (INEG) is diverted from a drive current (IDRIVE) of the LED (3) to the energy storage arrangement; and, in a discharging switch configuration corresponding to the logic high, a positive modulatiType: ApplicationFiled: November 28, 2016Publication date: November 7, 2019Applicant: Philips Lighting Holding B.V.Inventors: Junhu LIU, Zhi Quan CHEN, Biwen XU, Gang G. WANG, Gang K. WANG
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Publication number: 20190217551Abstract: A hot-plate-welded water pipe includes a first water inlet pipe, a second water inlet pipe, a lateral pipe, all of a hollow cylinder shape, and a cover plate. The lateral pipe is connected to and in communication with the first water inlet pipe and second water inlet pipe, an opening is provided on a central portion of the lateral tube, and the opening protrudes from a surface of the lateral pipe. The cover plate is connected onto the opening, and the cover plate is welded onto the opening through hot-plate-welding. The first water inlet pipe, the second water inlet pipe, and the lateral pipe formed integrally into a body through injection molding.Type: ApplicationFiled: January 15, 2019Publication date: July 18, 2019Inventors: Zhi-Quan Zhou, Shi-Ming Zheng, Li-Zhong Liao
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Patent number: 10334669Abstract: A lighting circuit uses a tapped linear driver architecture in which there are at least two LED types; a first LED type with a first forward voltage, and a second LED type with a second forward voltage at least double the first forward voltage. The first segment of the tapped linear driver comprises more LEDs of the first type than the second type and the last segment comprises more LEDs of the second type than the first type. This arrangement enables a reduction in the number of LEDs needed, but without significantly impacting on the efficiency of the circuit.Type: GrantFiled: March 15, 2018Date of Patent: June 25, 2019Assignee: SIGNIFY HOLDING B.V.Inventors: Shan Wang, Chun Yang, Zhi Quan Chen, Gang Wang, Jie Fu
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Patent number: 10326374Abstract: Presented is a converter circuit having main switching circuiton a primary side of a transformer, for controlling supply of a current to a storage inductor on the primary side when the main switching circuit is conductive. The convertor circuit comprises: a control circuit operatively coupled to the main switching circuit and for controlling the main switching circuit, the control circuit comprising a control capacitor adapted to enable the control circuit and turn off the main switching circuit; an auxiliary inductor magnetically coupled to the storage inductor and adapted to trigger the control circuit to operate and turn off the main switching circuit in response to a voltage change in the storage inductor when the main switching circuit being conductive; and a charging circuit coupled between the auxiliary inductor and the control capacitor and adapted to enable the auxiliary inductor to charge the control capacitor.Type: GrantFiled: August 27, 2015Date of Patent: June 18, 2019Assignee: SIGNIFY HOLDING B.V.Inventor: Zhi Quan Chen
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Patent number: 10321409Abstract: An embodiment of a method for network resource management comprises performing joint traffic engineering and physical layer power control on a controller and using a routing and power control optimization process that comprises a combined alternating direction method of multipliers (ADMM) process and a power management process. First and second commands are generated at the controller according to optimization parameters determined by the routing and power control optimization process. The first and second commands are transmitted from the controller to nodes connected to the controller. The first commands are for modifying transmission parameters for links between nodes and the second commands are for modifying transmission parameters for connections between nodes and user devices.Type: GrantFiled: October 27, 2014Date of Patent: June 11, 2019Assignee: Huawei Technologies Co., Ltd.Inventors: Wei-Cheng Liao, Mingyi Hong, Zhi-Quan Luo, Hamidreza Farmanbar, Xu Li, Hang Zhang
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Patent number: 10304533Abstract: A phase change memory apparatus comprises at least one heating layer; and at least one phase change layer comprising a vanadium dioxide layer, wherein each of the at least one phase change layer is set corresponding to each of the at least one heating layer, the at least one heating layer is configured to heat the at least one phase change layer.Type: GrantFiled: February 2, 2018Date of Patent: May 28, 2019Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Ji-Wei Hou, Zhi-Quan Yuan, Kai Liu, Peng Liu, Kai-Li Jiang, Shou-Shan Fan
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Patent number: 10205615Abstract: A method is provided for digital Simultaneous Information and Energy Transfer (SIET), comprising the steps of receiving a serial SIET analog signal, and converting the serial SIET analog signal received into a parallel SIET analog signal, extracting an analog information signal and an analog energy signal from the parallel SIET analog signal, performing analog-to-digital conversion on the analog information signal to obtain a digital information signal, and performing information demodulation, parallel-to-serial conversion and decoding on the digital information signal in digital domain, and pre-processing the analog energy signal in analog domain and storing the preprocessed analog energy signal. As the information signal is processed in the digital domain and the energy signal is processed in the analog domain, the energy in the SIET signal can be full collected in receiving side.Type: GrantFiled: December 5, 2017Date of Patent: February 12, 2019Assignee: South University of Science & Technology of ChinaInventors: Yi Gong, Zhi Quan, Zidong Han
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Publication number: 20180352621Abstract: A lighting circuit uses a tapped linear driver architecture in which there are at least two LED types; a first LED type with a first forward voltage, and a second LED type with a second forward voltage at least double the first forward voltage. The first segment of the tapped linear driver comprises more LEDs of the first type than the second type and the last segment comprises more LEDs of the second type than the first type. This arrangement enables a reduction in the number of LEDs needed, but without significantly impacting on the efficiency of the circuit.Type: ApplicationFiled: March 15, 2018Publication date: December 6, 2018Inventors: SHAN WANG, CHUN YANG, ZHI QUAN CHEN, GANG WANG, JIE FU
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Publication number: 20180342673Abstract: A phase change memory apparatus comprises at least one heating layer; and at least one phase change layer comprising a vanadium dioxide layer, wherein each of the at least one phase change layer is set corresponding to each of the at least one heating layer, the at least one heating layer is configured to heat the at least one phase change layer.Type: ApplicationFiled: February 2, 2018Publication date: November 29, 2018Inventors: JI-WEI HOU, ZHI-QUAN YUAN, KAI LIU, PENG LIU, KAI-LI JIANG, SHOU-SHAN FAN
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Publication number: 20180342296Abstract: A phase change memory apparatus comprises at least one heating layer; and at least one phase change layer comprising a vanadium dioxide layer, wherein each of the at least one phase change layer is set corresponding to each of the at least one heating layer, the at least one heating layer is configured to heat the at least one phase change layer.Type: ApplicationFiled: February 2, 2018Publication date: November 29, 2018Inventors: JI-WEI HOU, ZHI-QUAN YUAN, KAI LIU, PENG LIU, KAI-LI JIANG, SHOU-SHAN FAN
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Patent number: 10141842Abstract: The invention provides a power converter comprising: an input for receiving input power with a variable nominal mains level, wherein said variable nominal mains level falls within at least 90V to 240V; a main power switch (Q1) driven by the input power, and a control circuit (Q2, Q3) for controlling a control current of the main power switch (Q1), wherein the control circuit in (Q2, Q3) is adapted to sense the level of the input power and draw current from a control terminal of the power switch (Q1) according to the level, and said control circuit is adapted to operate in linear region and increase the drawn current along with the increase of the level throughout the variable nominal mains level of the input power, wherein the control circuit comprises: a Darlington bridge with a first transistor (Q2) and a second transistor (Q3), the first transistor (Q2) with a base terminal connected to a circuit position indicative of the voltage amplitude of the input power, the second transistor (Q3) with a base terminaType: GrantFiled: June 29, 2016Date of Patent: November 27, 2018Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Xianhui Zhang, Ken K. Li, Zhi Quan Chen, Junhu Liu, Ace Li
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Patent number: 10104611Abstract: Systems and methods for low overhead paging in a wireless communications network are described herein. In some aspects, an apparatus for wireless communication includes a receiver and a processor. The receiver receives a request from a first device. The request indicates a first period of a plurality of periods corresponding to a periodicity for transmitting paging messages. The processor assigns the first device to a group scheduled to receive paging messages at most every first period based on the request and determines a start time for transmitting paging messages to the first device based on schedules for transmitting paging messages to a plurality of other devices. In other aspects, an apparatus for wireless communication includes a processor and memory. The processor derives an information sub-unit from an information unit associated with a paging message, compresses the information sub-unit, and generates a second information unit associated with the method of compression.Type: GrantFiled: February 3, 2017Date of Patent: October 16, 2018Assignee: QUALCOMM IncorporatedInventors: Simone Merlin, Maarten Menzo Wentink, Zhi Quan, Alfred Asterjadhi
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Publication number: 20180241307Abstract: The invention provides a power converter comprising: an input for receiving input power with a variable nominal mains level, wherein said variable nominal mains level falls within at least 90V to 240V; a main power switch (Q1) driven by the input power, and a control circuit (Q2, Q3) for controlling a control current of the main power switch (Q1), wherein the control circuit in (Q2, Q3) is adapted to sense the level of the input power and draw current from a control terminal of the power switch (Q1) according to the level, and said control circuit is adapted to operate in linear region and increase the drawn current along with the increase of the level throughout the variable nominal mains level of the input power, wherein the control circuit comprises: a Darlington bridge with a first transistor (Q2) and a second transistor (Q3), the first transistor (Q2) with a base terminal connected to a circuit position indicative of the voltage amplitude of the input power, the second transistor (Q3) with a base terminaType: ApplicationFiled: June 29, 2016Publication date: August 23, 2018Inventors: XIANHUI ZHANG, KEN K. LI, ZHI QUAN CHEN, JUNHU LIU, ACE LI
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Publication number: 20180234019Abstract: Presented is a converter circuit having main switching circuiton a primary side of a transformer, for controlling supply of a current to a storage inductor on the primary side when the main switching circuit is conductive. The convertor circuit comprises: a control circuit operatively coupled to the main switching circuit and for controlling the main switching circuit, the control circuit comprising a control capacitor adapted to enable the control circuit and turn off the main switching circuit; an auxiliary inductor magnetically coupled to the storage inductor and adapted to trigger the control circuit to operate and turn off the main switching circuit in response to a voltage change in the storage inductor when the main switching circuit being conductive; and a charging circuit coupled between the auxiliary inductor and the control capacitor and adapted to enable the auxiliary inductor to charge the control capacitor.Type: ApplicationFiled: August 27, 2015Publication date: August 16, 2018Inventor: ZHI QUAN CHEN
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Patent number: 9949041Abstract: A hearing assistance system includes an adaptive binaural beamformer based on a multichannel Wiener filter (MWF) optimized for noise reduction and speech quality criteria using a priori spatial information. In various embodiments, the optimization problem is formulated as a quadratically constrained quadratic program (QCQP) aiming at striking an appropriate balance between these criteria. In various embodiments, the MWF executes a low-complexity iterative dual decomposition algorithm to solve the QCQP formulation.Type: GrantFiled: August 6, 2015Date of Patent: April 17, 2018Assignee: Starkey Laboratories, Inc.Inventors: Wei-Cheng Liao, Zhi-Quan Luo, Ivo Merks, Mingyi Hong, Tao Zhang