Patents by Inventor Yongchang Dai

Yongchang Dai 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).

  • Patent number: 11991809
    Abstract: A method for controlling an electronic device with a remote control includes detecting a motion of the remote control and determining a command associated with the detected motion. The determined command is sent from the remote control to the electronic device. A corresponding remote control includes a motion detector for detecting a motion of the remote control, a device for determining a command associated with the detected motion, and a transmitter for sending the determined command to the electronic device.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: May 21, 2024
    Assignee: LEDVANCE GMBH
    Inventors: Yongchang Dai, Huajin Huang, Wang Jiang, Yafen Zhang
  • Publication number: 20230090490
    Abstract: A method for controlling an electronic device with a remote control includes detecting a motion of the remote control and determining a command associated with the detected motion. The determined command is sent from the remote control to the electronic device. A corresponding remote control includes a motion detector for detecting a motion of the remote control, a device for determining a command associated with the detected motion, and a transmitter for sending the determined command to the electronic device.
    Type: Application
    Filed: October 28, 2022
    Publication date: March 23, 2023
    Inventors: Yongchang DAI, Huajin HUANG, Wang JIANG, Yafen ZHANG
  • Patent number: 11490494
    Abstract: A method for controlling an electronic device with a remote control includes detecting a motion of the remote control and determining a command associated with the detected motion. The determined command is sent from the remote control to the electronic device. A corresponding remote control includes a motion detector for detecting a motion of the remote control, a device for determining a command associated with the detected motion, and a transmitter for sending the determined command to the electronic device.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: November 1, 2022
    Assignee: LEDVANCE GMBH
    Inventors: Yongchang Dai, Huajin Huang, Wang Jiang, Yafen Zhang
  • Patent number: 11043895
    Abstract: A buck converter for converting a DC input voltage into a DC output voltage comprises a DC input circuit with a positive input terminal and a negative input terminal, for providing a DC input voltage, a converter circuit for converting a DC input voltage into a DC output voltage, and a DC output circuit with a positive output terminal, a negative output terminal and an output capacitor connected between the positive output terminal and the negative output terminal. The buck converter further comprises a switching device with a first switching terminal connected with the positive input terminal and a second switching terminal connected over a charging diode with the negative input terminal, a charging inductor as well as a frequency-dependent back-flow circuit connecting the positive output terminal with a power supply terminal of the switching device for supporting the power supply of the switching device.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: June 22, 2021
    Assignee: LEDVANCE GMBH
    Inventors: Shengdie Lin, Yongchang Dai
  • Patent number: 10560997
    Abstract: A lamp driver for an LED lamp includes a voltage input port which is adapted to connect the lamp driver to a power source. A boost converter circuit is connected to the voltage input port. A voltage output port is adapted for connecting an LED to the lamp driver. A shutdown circuit provides a shutdown signal, which is connected to the voltage input port for detecting an input voltage of the voltage input port and is connected to the boost converter circuit for controlling at least one active component of the boost converter. The shutdown circuit is arranged to shut down the boost converter circuit when a shutdown voltage at the voltage input port is detected. During the shutdown of the boost converter circuit, the voltage output port still provides an operation voltage for the LED.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: February 11, 2020
    Assignee: LEDVANCE GMBH
    Inventors: Yongchang Dai, Xiaoming Fu, Xiangyin Hao, Kun Xiong
  • Publication number: 20190356224
    Abstract: A buck converter for converting a DC input voltage into a DC output voltage comprises a DC input circuit with a positive input terminal and a negative input terminal, for providing a DC input voltage, a converter circuit for converting a DC input voltage into a DC output voltage, and a DC output circuit with a positive output terminal, a negative output terminal and an output capacitor connected between the positive output terminal and the negative output terminal. The buck converter further comprises a switching device with a first switching terminal connected with the positive input terminal and a second switching terminal connected over a charging diode with the negative input terminal, a charging inductor as well as a frequency-dependent back-flow circuit connecting the positive output terminal with a power supply terminal of the switching device for supporting the power supply of the switching device.
    Type: Application
    Filed: May 17, 2019
    Publication date: November 21, 2019
    Inventors: Shengdie Lin, Yongchang Dai
  • Publication number: 20190098732
    Abstract: A method for controlling an electronic device with a remote control includes detecting a motion of the remote control and determining a command associated with the detected motion. The determined command is sent from the remote control to the electronic device. A corresponding remote control includes a motion detector for detecting a motion of the remote control, a device for determining a command associated with the detected motion, and a transmitter for sending the determined command to the electronic device.
    Type: Application
    Filed: September 6, 2018
    Publication date: March 28, 2019
    Inventors: Yongchang DAI, Huajin HUANG, Wang JIANG, Yafen ZHANG
  • Publication number: 20190098726
    Abstract: A lamp driver for an LED lamp includes a voltage input port which is adapted to connect the lamp driver to a power source. A boost converter circuit is connected to the voltage input port. A voltage output port is adapted for connecting an LED to the lamp driver. A shutdown circuit provides a shutdown signal, which is connected to the voltage input port for detecting an input voltage of the voltage input port and is connected to the boost converter circuit for controlling at least one active component of the boost converter. The shutdown circuit is arranged to shut down the boost converter circuit when a shutdown voltage at the voltage input port is detected. During the shutdown of the boost converter circuit, the voltage output port still provides an operation voltage for the LED.
    Type: Application
    Filed: September 11, 2018
    Publication date: March 28, 2019
    Inventors: Yongchang DAI, Xiaoming FU, Xiangyin HAO, Kun XIONG
  • Patent number: 9814107
    Abstract: Various embodiments may relate to a drive circuit of an illumination device. The drive circuit has an output terminal connected to a load of the illumination device. The drive circuit includes a power supply, a boost control unit connected to an output terminal of the power supply, a main control unit connected to the boost control unit, and a load current control unit connected between the main control unit and the load, and including a switch unit. The switch unit includes a first sub switch unit, which is configured to switch according to a dimming control signal from the main control unit, and further includes a second sub switch unit connected to the first sub switch unit. The second sub switch unit is configured to be turned on in a situation where the first sub switch unit is turned on so as to turn off the first sub switch unit.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: November 7, 2017
    Assignee: OSRAM GmbH
    Inventors: Yongchang Dai, Daxin Lin
  • Publication number: 20170273151
    Abstract: Various embodiments may relate to a drive circuit of an illumination device. The drive circuit has an output terminal connected to a load of the illumination device. The drive circuit includes a power supply, a boost control unit connected to an output terminal of the power supply, a main control unit connected to the boost control unit, and a load current control unit connected between the main control unit and the load, and including a switch unit. The switch unit includes a first sub switch unit, which is configured to switch according to a dimming control signal from the main control unit, and further includes a second sub switch unit connected to the first sub switch unit. The second sub switch unit is configured to be turned on in a situation where the first sub switch unit is turned on so as to turn off the first sub switch unit.
    Type: Application
    Filed: February 26, 2015
    Publication date: September 21, 2017
    Inventors: Yongchang Dai, Daxin Lin
  • Publication number: 20160255684
    Abstract: Various embodiments may relate to a drive circuit of an illumination device. The drive circuit has an output terminal connected to a load of the illumination device. The drive circuit includes a power supply, a boost control unit connected to an output terminal of the power supply, a main control unit connected to the boost control unit, and a load current control unit connected between the main control unit and the load, and including a switch unit. The switch unit includes a first sub switch unit, which is configured to switch according to a dimming control signal from the main control unit, and further includes a second sub switch unit connected to the first sub switch unit. The second sub switch unit is configured to be turned on in a situation where the first sub switch unit is turned on so as to turn off the first sub switch unit.
    Type: Application
    Filed: February 26, 2015
    Publication date: September 1, 2016
    Inventors: Yongchang Dai, Daxin Lin