Patents by Inventor Zheng Luo

Zheng 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).

  • Publication number: 20240087500
    Abstract: A display control method for an LED display system, an LED driving circuit and an LED display system are provided. The display control method includes: receiving a data signal that includes at least transmission identification and display data and a clock signal; controlling serial transmission of the clock signal according to the transmission identification in each of a plurality of groups of cascaded LED driving circuits. The disclosure determines transmission identification of a next display cycle according to display data of a current display cycle and display data of the next display cycle, and turn on or off transmission of a clock signal in the current display cycle in accordance with the transmission identification. When the control terminal has a plurality of ports which share the clock signal, the LED driving circuit can turn off modules as many as possible for a black screen, thereby reducing power consumption.
    Type: Application
    Filed: March 25, 2022
    Publication date: March 14, 2024
    Inventors: Zheng Luo, Jiandong Zhao
  • Publication number: 20230397311
    Abstract: LED driving circuit includes a first current source, a second current source, a current sensing circuit, and a control circuit. The first current source, coupled in series with a heat dissipation resistor, provides a first current path to the LED string. The second current source, coupled in parallel with the serially coupled first current source and the heat dissipation resistor, provides a second current path to the LED string. The current sensing circuit is configured to sense a current sense signal representing a current flowing through the LED string. The control circuit is configured to control a current distribution of the first current path and a second current path in response to the current sense signal. When the current sense signal is greater than a threshold, a current flowing through the first current path is larger than a current flowing through the second current path.
    Type: Application
    Filed: June 28, 2023
    Publication date: December 7, 2023
    Inventors: Chia-Lung Ni, Zheng Luo, Yu-Huei Lee, Junjian Zhao
  • Patent number: 11721795
    Abstract: A LED driving system for driving a LED matrix. The LED driving system includes an interconnection structure having a first surface and a second surface opposite to the first surface and a plurality of driver dies/chips attached to the first surface of the interconnection structure. The LED matrix is divided into a plurality of sub LED matrix sections that are attached to the second surface of the interconnection structure. The interconnection structure is configured to electrically couple each one of the plurality of sub LED matrix sections to a corresponding one driver die/chip in the plurality of driver dies/chips.
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: August 8, 2023
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Junjian Zhao, Yu-Huei Lee, Liwei Hou, Zheng Luo, Ze-Qiang Yao, Heng Li, Suwei Wang, Tong Chen
  • Patent number: 11713772
    Abstract: A fan frame with an improved heat dissipation performance includes a frame body, a plurality of stationary blades, and a central base. The frame body defines a flow channel, the central base is arranged within the flow channel and divides the flow channel into flowing zones. Each of the flowing zone includes a high-pressure zone and a low-pressure zone. The central base defines first slot, second slot and receiving groove between the first slot and the second slot, the first slot communicates the high-pressure zone and the receiving groove, the second slot communicates the low-pressure zone and the receiving groove.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: August 1, 2023
    Assignee: CHAMP TECH OPTICAL (FOSHAN) CORPORATION
    Inventors: Zheng Luo, Xiao-Guang Ma, Yong-Kang Zhang, Yung-Ping Lin
  • Patent number: 11635088
    Abstract: A cooling fan creating a more stable airflow for heat-removing purposes, with reduced noise of operation, comprises a rotor hub and preferably an odd number of blades mounted on periphery of the rotor hub in unequal intervals. Adjacent blades are configured with different shapes, reducing the noise generated during operation without affecting the cooling effect.
    Type: Grant
    Filed: May 26, 2022
    Date of Patent: April 25, 2023
    Assignee: CHAMP TECH OPTICAL (FOSHAN) CORPORATION
    Inventors: Xiao-Guang Ma, Zheng Luo, Yung-Ping Lin, Yong-Kang Zhang
  • Patent number: 11566638
    Abstract: A three-bladed impeller providing a cooling airflow in air, with increased heat-dissipating efficiency and reduced noise includes a hub and three blades, the blades are arranged around the hub. Each blade is arched along its axial length from the front of fan to the back and also arched radially from the hub end of each blade to the outside tip. The back edge of each blade includes first and second slots, arranged alternately, the width of each first slot is ?1, the width of each of each second slot is ?2, the comparative sizes between ?2 and ?1 are in a ratio range of 1.6:1 to 1.8:1 (?2:?1).
    Type: Grant
    Filed: March 3, 2022
    Date of Patent: January 31, 2023
    Assignee: CHAMP TECH OPTICAL (FOSHAN) CORPORATION
    Inventors: Zheng Luo, Xiao-Guang Ma, Yung-Ping Lin, Yong-Kang Zhang
  • Publication number: 20220341438
    Abstract: A fan frame with an improved heat dissipation performance includes a frame body, a plurality of stationary blades, and a central base. The frame body defines a flow channel, the central base is arranged within the flow channel and divides the flow channel into flowing zones. Each of the flowing zone includes a high-pressure zone and a low-pressure zone. The central base defines first slot, second slot and receiving groove between the first slot and the second slot, the first slot communicates the high-pressure zone and the receiving groove, the second slot communicates the low-pressure zone and the receiving groove.
    Type: Application
    Filed: March 21, 2022
    Publication date: October 27, 2022
    Inventors: ZHENG LUO, XIAO-GUANG MA, YONG-KANG ZHANG, YUNG-PING LIN
  • Patent number: 11472471
    Abstract: A differential cooperative active steering system for a front-axle independent-drive vehicle with electric wheels includes a steering rack which is arranged between a first steering wheel and a second steering wheel, and is able to generate lateral displacement and pull the first and second steering wheels to steer; a planetary gear mechanism, including a first input end, a second input end and an output end; a steering angle coupling motor, connected to the first input end; and an input shaft of the steering wheel, connected to the second input end. The planetary gear mechanism can realize the coupling between an input steering angle of an input shaft of the steering wheel and an input steering angle of the steering angle coupling motor. In addition, a method for controlling the differential cooperative active steering system is provided.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: October 18, 2022
    Assignee: JILIN UNIVERSITY
    Inventors: Junnian Wang, Dedong Guo, Shoulin Gao, Zheng Luo
  • Patent number: 11470707
    Abstract: An LED driving system for synchronizing two LED driving integrated circuits to drive LED strings. The LED driving system sequentially activates the LED strings driven by the first LED driving integrated circuit and then outputs a downstream enabling signal from the first LED driving integrated circuit to the second LED driving integrated circuit to activate the LED strings driven by the second LED driving integrated circuit.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: October 11, 2022
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Junjian Zhao, Chia-Lung Ni, Zheng Luo, Yu-Huei Lee, Huan Liu
  • Publication number: 20220307519
    Abstract: A three-bladed impeller providing a cooling airflow in air, with increased heat-dissipating efficiency and reduced noise includes a hub and three blades, the blades are arranged around the hub. Each blade is arched along its axial length from the front of fan to the back and also arched radially from the hub end of each blade to the outside tip. The back edge of each blade includes first and second slots, arranged alternately, the width of each first slot is ?1, the width of each of each second slot is ?2, the comparative sizes between ?2 and ?1 are in a ratio range of 1.6:1 to 1.8:1 (?2:?1).
    Type: Application
    Filed: March 3, 2022
    Publication date: September 29, 2022
    Applicant: CHAMP TECH OPTICAL (FOSHAN) CORPORATION
    Inventors: ZHENG LUO, XIAO-GUANG MA, YUNG-PING LIN, YONG-KANG ZHANG
  • Publication number: 20220302361
    Abstract: A LED driving system for driving a LED matrix. The LED driving system includes an interconnection structure having a first surface and a second surface opposite to the first surface and a plurality of driver dies/chips attached to the first surface of the interconnection structure. The LED matrix is divided into a plurality of sub LED matrix sections that are attached to the second surface of the interconnection structure. The interconnection structure is configured to electrically couple each one of the plurality of sub LED matrix sections to a corresponding one driver die/chip in the plurality of driver dies/chips.
    Type: Application
    Filed: March 18, 2021
    Publication date: September 22, 2022
    Inventors: Junjian Zhao, Yu-Huei Lee, Liwei Hou, Zheng Luo, Ze-Qiang Yao, Heng Li, Suwei Wang, Tong Chen
  • FAN
    Publication number: 20220252081
    Abstract: A fan includes a hub, a plurality of fan blades arranged around the hub and connected to the hub, and a plurality of guiding parts. Each of the plurality of fan blades comprises a windward surface and a leeward surface facing away from the windward surface. Each of the plurality of guiding parts is arranged on each of the plurality of fan blades. Each of the plurality of guiding parts comprises a plurality of guiding portions. Each of the plurality of the guiding portions protrudes from or is recessed in the windward surface or the leeward surface.
    Type: Application
    Filed: October 15, 2021
    Publication date: August 11, 2022
    Inventors: XIAO-GUANG MA, YONG-KANG ZHANG, ZHENG LUO, YUNG-PING LIN
  • Publication number: 20220136733
    Abstract: The present invention discloses a film type liquid heater and a uniform heating method thereof. End fixation plates are arranged at two ends of a barrel. A heating pipe is arranged in the barrel. Pipe ports run through the two end fixation plates, respectively. Connecting pipes are arranged in the pipe ports. Sealing connection components are arranged at inner ends of the two connecting pipes. A heating film layer is coated outside the heating pipe. Electrode layers are connected left and right sides of the heating film layer, and the electrode layers are connected to an external power supply. An insulating layer is coated outside the heating film layer. A flow splitting column is fixedly connected in the heating pipe. A heating chamber is formed between an inner side of the heating pipe and the flow splitting column. Flow splitting grooves are formed at left and right ends and on the inner side of the flow splitting column.
    Type: Application
    Filed: December 31, 2020
    Publication date: May 5, 2022
    Inventors: XIN FU, ZHENG LUO, YIWEN ZHAO, SEN DU, NING XU
  • Patent number: 11310879
    Abstract: A feedback control circuit in an LED driving circuit for driving a plurality of LED strings. Each LED string provides a headroom detecting voltage. The feedback control circuit has a status detecting circuit, a counting circuit and a modulating circuit. The status detecting circuit compares each headroom detecting voltage with a low headroom threshold voltage and a high headroom threshold voltage and generates an up self-status signal and a down self-status signal. The counting circuit counts or keeps unchanged and then generates a counting signal based on the up self-status signal and the down self-status signal. The modulating circuit generates a modulating signal based on the counting signal. And based on the modulating signal, the feedback control circuit generates a feedback control signal to regulate a bias voltage supplying the plurality of LED strings.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: April 19, 2022
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Junjian Zhao, Chia-Lung Ni, Zheng Luo, Yu-Huei Lee, Huan Liu
  • Patent number: 11221023
    Abstract: A fan module includes a first fan frame and a second fan frame. A side surface of the first fan frame includes a number of latching posts and a number of positioning portions extending toward the second fan frame. A side surface of the second fan frame defines a number of latching grooves in one-to-one correspondence with the latching posts. The side surface of the second fan frame further defines a number of rotating grooves in one-to-one correspondence with the positioning portions. Engagement between the latching posts and the latching grooves restricts a tangential relative displacement between the first fan frame and the second fan frame. Engagement between the rotating grooves and the positioning portions restricts an axial displacement between the first fan frame and the second fan frame.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: January 11, 2022
    Assignee: CHAMP TECH OPTICAL (FOSHAN) CORPORATION
    Inventors: Xiao-Guang Ma, Zheng Luo
  • Patent number: 11191137
    Abstract: An LED driving system with a master-slave architecture. The LED driving system has at least two LED driving circuits which both have a first status detecting circuit, a second status detecting circuit and a first feedback control circuit. The first status detecting circuit receives a plurality of headroom detecting voltages provided by a plurality of LED strings and generates at least one self-status signal. The second status detecting circuit receives a downstream feedback signal and generates at least one downstream status signal. The first feedback control circuit generates a first feedback control signal based on the at least one self-status signal and the at least one downstream status signal. The second status detecting circuit of one LED driving circuit is coupled to the first feedback control circuit of the other LED driving circuit.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: November 30, 2021
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Junjian Zhao, Chia-Lung Ni, Zheng Luo, Yu-Huei Lee, Huan Liu
  • Patent number: 11186309
    Abstract: An active steering system using planetary gear set with less tooth difference and a control method thereof. The system includes a first input shaft with one end connected to a steering wheel of an automobile and the other end fixedly sleeved with a first gear; a ring gear sleeve, where a ring gear is fixedly mounted in the ring gear sleeve circumferentially, and a hollow shaft protrudes from a center of an end of the ring gear sleeve and is fixedly sleeved with a second gear engaged with the first gear; a second input shaft with one end fixedly connected to an output end of a coupled motor and the other end fixedly sleeved with a third gear; an eccentric shaft with one end fixedly sleeved with a fourth gear engaged with the third gear and the other end sleeved in the hollow shaft and eccentrically provided with a boss.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: November 30, 2021
    Assignee: Jilin University
    Inventors: Junnian Wang, Dedong Guo, Zheng Luo
  • Publication number: 20210277916
    Abstract: A fan module includes a first fan frame and a second fan frame. A side surface of the first fan frame includes a number of latching posts and a number of positioning portions extending toward the second fan frame. A side surface of the second fan frame defines a number of latching grooves in one-to-one correspondence with the latching posts. The side surface of the second fan frame further defines a number of rotating grooves in one-to-one correspondence with the positioning portions. Engagement between the latching posts and the latching grooves restricts a tangential relative displacement between the first fan frame and the second fan frame. Engagement between the rotating grooves and the positioning portions restricts an axial displacement between the first fan frame and the second fan frame.
    Type: Application
    Filed: April 10, 2020
    Publication date: September 9, 2021
    Inventors: XIAO-GUANG MA, ZHENG LUO
  • Publication number: 20210222724
    Abstract: A fastening nut and a fastening assembly that includes the fastening nut. The fastening nut includes a collar and a receiving column, the receiving column includes an engageable receiving portion and a deformable receiving portion. The deformable receiving portion includes an upper barrel and a lower barrel connected to each other. The upper barrel has a right cone shape, the lower barrel has an inverted cone shape, and an outwardly-protruding bent portion is formed at a joint between the upper barrel and the lower barrel. The deformable receiving portion includes at least two holes provided at intervals in a circumferential direction of the receiving column.
    Type: Application
    Filed: January 15, 2021
    Publication date: July 22, 2021
    Inventors: Zheng LUO, Zhaobao CAO, Zhilin LI
  • Patent number: D971721
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: December 6, 2022
    Assignee: Illinois Tool Works Inc.
    Inventors: Zheng Luo, Zhaobao Cao, Zhilin Li