Patents by Inventor FEIFEI SHEN

FEIFEI SHEN 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).

  • SPIKE-IN REFERENCE STANDARD FOR USE IN DETECTING SAMPLE TARGET FROM DNA OR RNA ORGANISM
    Publication number: 20240117451
    Abstract: Positive reference spiked in collected sample for use in qualitatively and quantitatively detecting viral RNA.
    Type: Application
    Filed: March 10, 2021
    Publication date: April 11, 2024
    Inventors: Shuwei YANG, Liancheng HUANG, Feifei FENG, Longwen SU, Kun LIN, Can TANG, Chen LIANG, Yuanmei WANG, Yanqing CAI, Yilin PANG, Chuan SHEN, Zhixue YU
  • ADAPTIVE CHARACTERISTIC SPECTRAL LINE SCREENING METHOD AND SYSTEM BASED ON ATOMIC EMISSION SPECTRUM
    Publication number: 20240068936
    Abstract: An adaptive characteristic spectral line screening method and system based on atomic emission spectrum are provided, the method includes: using a set characteristic screening optimization method to perform a plurality of optimization rounds of characteristic screening, obtaining an initialized spectral dataset of each round of the characteristic screening and initialized characteristic population genes; obtaining an optimal characteristic population gene of each round by a set analysis method, a fitness function, and an iteration of a genetic algorithm; obtaining an optimized characteristic spectral information set when the plurality of optimization rounds reach set optimization rounds; performing combination statistics and discriminant analyses on the optimized characteristic spectral information set to complete an adaptive characteristic spectral line screening.
    Type: Application
    Filed: October 10, 2022
    Publication date: February 29, 2024
    Inventors: Jia Liu, Feipeng Cui, Xiaopeng Li, Ling Liu, Hongwei Shi, Feifei Guo, Ying Zhao, Xuejing Shen, Haizhou Wang
  • LED system with driver voltage clamping
    Patent number: 10959298
    Abstract: One example includes a light-emitting diode (LED) system. The LED system includes an LED array comprising a plurality of LEDs that are each activated via an LED current provided therethrough to provide illumination. The system also includes an LED controller configured to sequentially activate the plurality of LEDs via at least one LED driver system configured to selectively provide the LED current through each sequential one of the plurality of LEDs in an activated state in response to an activation signal. The at least one LED driver system includes a voltage clamp configured to maintain a substantial constant amplitude difference of a driver voltage associated with the LED current from the activated state to a deactivated state.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: March 23, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Makalo Xie, Feifei Shen, Richard Tan, Alex Ruan
  • LED SYSTEM WITH DRIVER VOLTAGE CLAMPING
    Publication number: 20200092963
    Abstract: One example includes a light-emitting diode (LED) system. The LED system includes an LED array comprising a plurality of LEDs that are each activated via an LED current provided therethrough to provide illumination. The system also includes an LED controller configured to sequentially activate the plurality of LEDs via at least one LED driver system configured to selectively provide the LED current through each sequential one of the plurality of LEDs in an activated state in response to an activation signal. The at least one LED driver system includes a voltage clamp configured to maintain a substantial constant amplitude difference of a driver voltage associated with the LED current from the activated state to a deactivated state.
    Type: Application
    Filed: November 22, 2019
    Publication date: March 19, 2020
    Inventors: Makalo Xie, Feifei Shen, Richard Tan, Alex Ruan
  • LED system with driver voltage clamping
    Patent number: 10524321
    Abstract: One example includes a light-emitting diode (LED) system. The LED system includes an LED array comprising a plurality of LEDs that are each activated via an LED current provided therethrough to provide illumination. The system also includes an LED controller configured to sequentially activate the plurality of LEDs via at least one LED driver system configured to selectively provide the LED current through each sequential one of the plurality of LEDs in an activated state in response to an activation signal. The at least one LED driver system includes a voltage clamp configured to maintain a substantial constant amplitude difference of a driver voltage associated with the LED current from the activated state to a deactivated state.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: December 31, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Makalo Xie, FeiFei Shen, Richard Tan, Alex Ruan
  • LED SYSTEM WITH DRIVER VOLTAGE CLAMPING
    Publication number: 20180302966
    Abstract: One example includes a light-emitting diode (LED) system. The LED system includes an LED array comprising a plurality of LEDs that are each activated via an LED current provided therethrough to provide illumination. The system also includes an LED controller configured to sequentially activate the plurality of LEDs via at least one LED driver system configured to selectively provide the LED current through each sequential one of the plurality of LEDs in an activated state in response to an activation signal. The at least one LED driver system includes a voltage clamp configured to maintain a substantial constant amplitude difference of a driver voltage associated with the LED current from the activated state to a deactivated state.
    Type: Application
    Filed: April 17, 2018
    Publication date: October 18, 2018
    Inventors: Makalo Xie, FeiFei Shen, Richard Tan, Alex Ruan
  • LED system with driver voltage clamping
    Patent number: 9949327
    Abstract: One example includes a light-emitting diode (LED) system. The LED system includes an LED array comprising a plurality of LEDs that are each activated via an LED current provided therethrough to provide illumination. The system also includes an LED controller configured to sequentially activate the plurality of LEDs via at least one LED driver system configured to selectively provide the LED current through each sequential one of the plurality of LEDs in an activated state in response to an activation signal. The at least one LED driver system includes a voltage clamp configured to maintain a substantial constant amplitude difference of a driver voltage associated with the LED current from the activated state to a deactivated state.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: April 17, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Makalo Xie, Feifei Shen, Richard Tan, Alex Ruan
  • LED SYSTEM WITH DRIVER VOLTAGE CLAMPING
    Publication number: 20160360584
    Abstract: One example includes a light-emitting diode (LED) system. The LED system includes an LED array comprising a plurality of LEDs that are each activated via an LED current provided therethrough to provide illumination. The system also includes an LED controller configured to sequentially activate the plurality of LEDs via at least one LED driver system configured to selectively provide the LED current through each sequential one of the plurality of LEDs in an activated state in response to an activation signal. The at least one LED driver system includes a voltage clamp configured to maintain a substantial constant amplitude difference of a driver voltage associated with the LED current from the activated state to a deactivated state.
    Type: Application
    Filed: February 28, 2014
    Publication date: December 8, 2016
    Inventors: MAKALO XIE, FEIFEI SHEN, RICHARD TAN, ALEX RUAN