Patents by Inventor Shengfei MA

Shengfei MA 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: 11568473
    Abstract: A method and a device for target finding are disclosed. The method for target finding includes collecting user demand information, determining the target according to user demand information, acquiring user position information and position information of the target, generating navigation information according to the position information of the target and the user position information, and outputting the navigation information.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: January 31, 2023
    Assignees: Hefei BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Shufen Song, Xiaopeng Liu, Lei Wang, Shengfei Ma, Peng Xie
  • Patent number: 11295666
    Abstract: The present application discloses a method for driving a pixel circuit. The method includes initializing a voltage setting in a pixel circuit including at least a driving transistor coupled to a light-emitting device and obtaining a first threshold voltage of the driving transistor. The method further includes inputting a first data voltage to the pixel circuit to generate a first driving current independent of the first threshold voltage, to drive light emission of the light-emitting device in a current cycle. Additionally, the method includes generating a compensation voltage via a feedback sub-circuit based on a change of the first driving current upon a second threshold voltage of the light-emitting device. Furthermore, the method includes inputting a second data voltage combined with the compensation voltage as a negative feedback to generate a second driving current to drive light emission of the light-emitting device in a next cycle.
    Type: Grant
    Filed: August 16, 2018
    Date of Patent: April 5, 2022
    Assignees: HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE Technology Group Co., Ltd.
    Inventors: Ran Jiang, Hai Kang, Donghui Wang, Chengchen Yan, Shengfei Ma
  • Publication number: 20210335232
    Abstract: The present application discloses a method for driving a pixel circuit. The method includes initializing a voltage setting in a pixel circuit including at least a driving transistor coupled to a light-emitting device and obtaining a first threshold voltage of the driving transistor. The method further includes inputting a first data voltage to the pixel circuit to generate a first driving current independent of the first threshold voltage, to drive light emission of the light-emitting device in a current cycle. Additionally, the method includes generating a compensation voltage via a feedback sub-circuit based on a change of the first driving current upon a second threshold voltage of the light-emitting device. Furthermore, the method includes inputting a second data voltage combined with the compensation voltage as a negative feedback to generate a second driving current to drive light emission of the light-emitting device in a next cycle.
    Type: Application
    Filed: August 16, 2018
    Publication date: October 28, 2021
    Applicants: HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE Technology Group Co., Ltd.
    Inventors: Ran Jiang, Hai Kang, Donghui Wang, Chengchen Yan, Shengfei Ma
  • Publication number: 20210125264
    Abstract: A method and a device for target finding are disclosed. The method for target finding includes collecting user demand information, determining the target according to user demand information, acquiring user position information and position information of the target, generating navigation information according to the position information of the target and the user position information, and outputting the navigation information.
    Type: Application
    Filed: October 31, 2019
    Publication date: April 29, 2021
    Inventors: Shufen SONG, Xiaopeng LIU, Lei WANG, Shengfei MA, Peng XIE
  • Patent number: 10630166
    Abstract: The disclosure discloses an absorption circuit which is coupled to a switching power supply, wherein the absorption circuit comprises: a switching power supply voltage spike suppression circuit for changing a voltage spike of the switching power supply into a desired voltage spike, an energy storage circuit which is coupled to the switching power supply voltage spike suppression circuit and used for storing the spike voltage that is suppressed, and a release circuit which is coupled to the energy storage circuit and used for, when the voltage stored by the energy storage circuit is higher than the output voltage of the switching power supply, releasing the energy which is stored by the energy storage circuit and higher than the output voltage to the output terminal of the switching power supply. The disclosure further discloses a corresponding switching power supply and a liquid crystal display driving circuit.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: April 21, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiaofei Peng, Jiacheng Huang, Shengfei Ma
  • Patent number: 10186182
    Abstract: An adapter device for test, including: an adapter board having a voltage input terminal connected to an external power supply and an output terminal connected to a terminal to be tested; a voltage conversion circuit disposed on the adapter board and connected to the voltage input terminal and configured to convert the voltage of the external power supply received at the voltage input terminal into a test voltage to be supplied to the terminal to be tested; a feedback circuit connected to the voltage conversion circuit and configured to compare the test voltage with a reference voltage to provide feedback data; and a compensation circuit connected to the feedback circuit and the adapter board, and configured to generate a compensation voltage based on the feedback data and apply the compensation voltage to the adapter board to compensate for the test voltage.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: January 22, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Lei Wang, Xiaopeng Liu, Yanjiao Pan, Shufen Song, Shengfei Ma, Peng Xie
  • Publication number: 20180287486
    Abstract: The disclosure discloses an absorption circuit which is coupled to a switching power supply, wherein the absorption circuit comprises: a switching power supply voltage spike suppression circuit for changing a voltage spike of the switching power supply into a desired voltage spike, an energy storage circuit which is coupled to the switching power supply voltage spike suppression circuit and used for storing the spike voltage that is suppressed, and a release circuit which is coupled to the energy storage circuit and used for, when the voltage stored by the energy storage circuit is higher than the output voltage of the switching power supply, releasing the energy which is stored by the energy storage circuit and higher than the output voltage to the output terminal of the switching power supply. The disclosure further discloses a corresponding switching power supply and a liquid crystal display driving circuit.
    Type: Application
    Filed: April 14, 2017
    Publication date: October 4, 2018
    Applicants: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiaofei PENG, Jiacheng HUANG, Shengfei MA
  • Publication number: 20180277030
    Abstract: An adapter device for test, including: an adapter board having a voltage input terminal connected to an external power supply and an output terminal connected to a terminal to be tested; a voltage conversion circuit disposed on the adapter board and connected to the voltage input terminal and configured to convert the voltage of the external power supply received at the voltage input terminal into a test voltage to be supplied to the terminal to be tested; a feedback circuit connected to the voltage conversion circuit and configured to compare the test voltage with a reference voltage to provide feedback data; and a compensation circuit connected to the feedback circuit and the adapter board, and configured to generate a compensation voltage based on the feedback data and apply the compensation voltage to the adapter board to compensate for the test voltage.
    Type: Application
    Filed: October 20, 2017
    Publication date: September 27, 2018
    Inventors: Lei WANG, Xiaopeng LIU, Yanjiao PAN, Shufen SONG, Shengfei MA, Peng XIE