Patents by Inventor Yanfeng Du

Yanfeng Du 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: 11134237
    Abstract: A three-dimensional display system includes: an LED array and a light control layer disposed on a base substrate; wherein the LED array is used to form polarized lights of different polarization directions; the light control layer is used to control a light emission order of the polarized lights of different polarization directions.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: September 28, 2021
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventors: Yanfeng Wang, Xue Dong, Dan Wang, Yun Qiu, Yuanxin Du, Zhenhua Lv, Xiaoling Xu, Zhidong Wang, Weipin Hu, Congcong Wei
  • Patent number: 11103201
    Abstract: An anti-scatter grid, a detector with such an anti-scatter grid and a radiation imaging system including such a detector with an anti-scatter grid are provided. The anti-scatter grid includes at least one grid wall. The parameters of the grid wall may be adjusted to arrive a uniform scatter-to-primary ratio. The parameters of the grid wall comprise thickness, height, shape, or position of the grid wall, or width of interspace between two grid walls. The detector includes the anti-scatter grid, at least one photosensor, and at least one scintillator. The radiation system includes a radiation generator, a radiation detector with the anti-scatter grid, and a processor.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: August 31, 2021
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventor: Yanfeng Du
  • Patent number: 11075051
    Abstract: A radiation emission device is provided. The radiation emission device may include an anode, a first cathode, a heating device and an enclosure. The first cathode may include a first filament that emit an electron beam striking the anode to generate radioactive rays for imaging. The heating device may be located outside of the first cathode and be configured to warm up the anode. The enclosure may be configured to enclosure the first cathode and the anode.
    Type: Grant
    Filed: December 29, 2018
    Date of Patent: July 27, 2021
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yun Zou, Xi Zhang, Dun Li, Yanfeng Du, Haining Sun
  • Publication number: 20200352538
    Abstract: The present disclosure relates to a method and a system for computed tomography imaging. The method may comprise obtaining original data; obtaining a preprocessing result by preprocessing the original data; obtaining intensity of the artifact based on the preprocessing result; and updating a damaged channel or the air correction table based on the intensity of the artifact. Updating the air correction table may comprise: obtaining a first air correction table corresponding to a first temperature of detector; obtaining real-time temperature of detector; and obtaining a second air correction table corresponding to the real-time temperature based on the real-time temperature and the first air correction table.
    Type: Application
    Filed: July 27, 2020
    Publication date: November 12, 2020
    Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yifeng JIANG, Yingbiao LIU, Yanfeng DU
  • Publication number: 20200303151
    Abstract: The present disclosure relates to a method and system for adjusting a focal point position of an X-ray tube. The method may include: obtaining a first thermal capacity and a first position of a focal point of an X-ray tube; obtaining a second thermal capacity of the X-ray tube; determining a second position of the focal point the X-ray tube based on the second thermal capacity; determining a target grid voltage difference of a focusing cup of the X-ray tube based on the first position and the second position of the focal point; and adjusting the X-ray tube based on the target grid voltage difference.
    Type: Application
    Filed: June 6, 2020
    Publication date: September 24, 2020
    Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yanfeng DU, Yingbiao LIU
  • Publication number: 20200237324
    Abstract: An anti-scatter grid, a detector with such an anti-scatter grid and a radiation imaging system including such a detector with an anti-scatter grid are provided. The anti-scatter grid includes at least one grid wall. The parameters of the grid wall may be adjusted to arrive a uniform scatter-to-primary ratio. The parameters of the grid wall comprise thickness, height, shape, or position of the grid wall, or width of interspace between two grid walls. The detector includes the anti-scatter grid, at least one photosensor, and at least one scintillator. The radiation system includes a radiation generator, a radiation detector with the anti-scatter grid, and a processor.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventor: Yanfeng DU
  • Patent number: 10722204
    Abstract: The present disclosure relates to a method and a system for computed tomography imaging. The method may comprise obtaining original data; obtaining a preprocessing result by preprocessing the original data; obtaining intensity of the artifact based on the preprocessing result; and updating a damaged channel or the air correction table based on the intensity of the artifact. Updating the air correction table may comprise: obtaining a first air correction table corresponding to a first temperature of detector; obtaining real-time temperature of detector; and obtaining a second air correction table corresponding to the real-time temperature based on the real-time temperature and the first air correction table.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: July 28, 2020
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yifeng Jiang, Yingbiao Liu, Yanfeng Du
  • Patent number: 10679817
    Abstract: The present disclosure relates to a method and system for adjusting a focal point position of an X-ray tube. The method may include: obtaining a first thermal capacity and a first position of a focal point of an X-ray tube; obtaining a second thermal capacity of the X-ray tube; determining a second position of the focal point the X-ray tube based on the second thermal capacity; determining a target grid voltage difference of a focusing cup of the X-ray tube based on the first position and the second position of the focal point; and adjusting the X-ray tube based on the target grid voltage difference.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: June 9, 2020
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yanfeng Du, Yingbiao Liu
  • Patent number: 10617369
    Abstract: An anti-scatter grid, a detector with such an anti-scatter grid and a radiation imaging system including such a detector with an anti-scatter grid are provided. The anti-scatter grid includes at least one grid wall. The parameters of the grid wall may be adjusted to arrive a uniform scatter-to-primary ratio. The parameters of the grid wall comprise thickness, height, shape, or position of the grid wall, or width of interspace between two grid walls. The detector includes the anti-scatter grid, at least one photosensor, and at least one scintillator. The radiation system includes a radiation generator, a radiation detector with the anti-scatter grid, and a processor.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: April 14, 2020
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventor: Yanfeng Du
  • Publication number: 20190206653
    Abstract: A radiation emission device is provided. The radiation emission device may include an anode, a first cathode, a heating device and an enclosure. The first cathode may include a first filament that emit an electron beam striking the anode to generate radioactive rays for imaging. The heating device may be located outside of the first cathode and be configured to warm up the anode. The enclosure may be configured to enclosure the first cathode and the anode.
    Type: Application
    Filed: December 29, 2018
    Publication date: July 4, 2019
    Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yun ZOU, Xi ZHANG, Dun LI, Yanfeng DU, Haining SUN
  • Publication number: 20180358198
    Abstract: The present disclosure relates to a method and system for adjusting a focal point position of an X-ray tube. The method may include: obtaining a first thermal capacity and a first position of a focal point of an X-ray tube; obtaining a second thermal capacity of the X-ray tube; determining a second position of the focal point the X-ray tube based on the second thermal capacity; determining a target grid voltage difference of a focusing cup of the X-ray tube based on the first position and the second position of the focal point; and adjusting the X-ray tube based on the target grid voltage difference.
    Type: Application
    Filed: September 30, 2017
    Publication date: December 13, 2018
    Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yanfeng DU, Yingbiao LIU
  • Publication number: 20170325775
    Abstract: The present disclosure relates to a method and a system for computer tomography imaging. The method may comprise obtaining original data; obtaining a preprocessing result by preprocessing the original data; obtaining intensity of the artifact based on the preprocessing result; and updating a damaged channel or the air correction table based on the intensity of the artifact. Updating the air correction table may comprise: obtaining a first air correction table corresponding to a first temperature of detector; obtaining real-time temperature of detector; and obtaining a second air correction table corresponding to the real-time temperature based on the real-time temperature and the first air correction table.
    Type: Application
    Filed: June 30, 2017
    Publication date: November 16, 2017
    Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Yifeng JIANG, Yingbiao LIU, Yanfeng DU
  • Publication number: 20170265822
    Abstract: An anti-scatter grid, a detector with such an anti-scatter grid and a radiation imaging system including such a detector with an anti-scatter grid are provided. The anti-scatter grid includes at least one grid wall. The parameters of the grid wall may be adjusted to arrive a uniform scatter-to-primary ratio. The parameters of the grid wall comprise thickness, height, shape, or position of the grid wall, or width of interspace between two grid walls. The detector includes the anti-scatter grid, at least one photosensor, and at least one scintillator. The radiation system includes a radiation generator, a radiation detector with the anti-scatter grid, and a processor.
    Type: Application
    Filed: October 30, 2015
    Publication date: September 21, 2017
    Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventor: Yanfeng DU
  • Patent number: 8610081
    Abstract: Systems and methods for generating control signal in radiation detector systems are provided. One system includes a scheduling architecture having at least one anode channel connected to a detector of the radiation detector system. The anode channel includes a charge sensitive amplifier and a signal shaper, wherein the anode channel is configured to generate at least one control signal to control data acquisition by the detector. The scheduling architecture also includes at least one shaper timer configured having a time constant to define timing for the generation of the control signal without using a clock.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: December 17, 2013
    Assignee: General Electric Company
    Inventors: Naresh Kesavan Rao, Walter Dixon, III, Yanfeng Du
  • Publication number: 20130161523
    Abstract: A radiation detector is provided employing a focus grid electrode. The focus grid electrode is biased relative to one or more anode electrodes. In this manner, movement of electrons to the anode electrodes may be enhanced, such as due to a higher electrical field strength in a conversion material and/or due to focusing of the resulting electrical field on the anode electrodes.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 27, 2013
    Applicant: General Electric Company
    Inventors: John Eric Tkaczyk, Vladimir A. Lobastov, Yanfeng Du
  • Patent number: 8466420
    Abstract: The present disclosure relates to the correction of charge loss in a radiation detector. In one embodiment, correction factors for charge loss may be determined based on depth of interaction and lateral position within a radiation detector of a charge creating event. The correction factors may be applied to subsequently measured signals to correct for the occurrence of charge loss in the measured signals.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: June 18, 2013
    Assignee: General Electric Company
    Inventors: Kristen Ann Wangerin, Wen Li, Yanfeng Du, Floribertus Heukensfeldt Jansen
  • Publication number: 20130126748
    Abstract: Systems and methods for generating control signal in radiation detector systems are provided. One system includes a scheduling architecture having at least one anode channel connected to a detector of the radiation detector system. The anode channel includes a charge sensitive amplifier and a signal shaper, wherein the anode channel is configured to generate at least one control signal to control data acquisition by the detector. The scheduling architecture also includes at least one shaper timer configured having a time constant to define timing for the generation of the control signal without using a clock.
    Type: Application
    Filed: November 23, 2011
    Publication date: May 23, 2013
    Applicant: General Electric Company
    Inventors: Naresh Kesavan Rao, Walter Dixon, III, Yanfeng Du
  • Patent number: 8384038
    Abstract: A data acquisition system includes a charge-sensitive amplifier (CSA) configured to receive a charge from an x-ray detector, the CSA includes a high-gain electronic voltage amplifier, an electrical energy storage device coupled with the amplifier, and an electrical resistor coupled with the amplifier. The data acquisition system includes a baseline sampling circuit configured to receive an output from the CSA and to sample a baseline signal from the CSA, at least one discriminator coupled to an output of the CSA and to an output of the baseline sampling circuit, the at least one discriminator configured to output a voltage if the output of the CSA exceeds a threshold, and a counter coupled to an output of the discriminator and configured to output a digital signal indicative of a photon count received at the x-ray detector and based on the output from the CSA and on the signal from the CSA.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: February 26, 2013
    Assignee: General Electric Company
    Inventors: Jianjun Guo, Naresh Kesavan Rao, John Eric Tkaczyk, Yanfeng Du, Naveen Chandra
  • Patent number: 8314395
    Abstract: A radiation detector includes a semiconductor crystal having a first surface and a second surface opposite to the first surface, a first electrode electrically coupled with the first surface of the semiconductor crystal to allow current to flow between the first electrode and the crystal, and an insulating layer on the first surface and between the semiconductor crystal and the first electrode so as to create a partially transmissive electrical barrier between the first electrode and the crystal. The insulating layer has a thickness ranging from about 50 nanometers to about 500 nanometers.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: November 20, 2012
    Assignee: General Electric Company
    Inventors: Minglong Zhang, Yanfeng Du, John Eric Tkaczyk, Zhaoping Wu, Ira Blevis
  • Patent number: 8159286
    Abstract: An event time stamping system comprising a current source, an integrator comprising an input and an output, and configured to output a voltage proportional to the length of time the current source is coupled to the input, and one or more switches configured to couple the current source to the input of the integrator upon receipt of an event signal and configured to de-couple the current source from the input of the integrator upon receipt of a control trigger. The system further comprises a lock-out signal generator configured to generate a lock-out signal, and a controller coupled to the one or more switches, wherein the controller is configured to generate the control trigger based on the lock-out signal to ensure a minimum integration time.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: April 17, 2012
    Assignee: General Electric Company
    Inventors: Naresh Kesavan Rao, Brian David Yanoff, Yanfeng Du, Jianjun Guo