Patents by Inventor Ran Tu

Ran Tu 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: 20240420644
    Abstract: A display may include an array of pixels that receive control signals from a chain of gate drivers. Each gate driver may include a mix of silicon transistors, one or more semiconducting oxide transistors, and one or more capacitors. The semiconducting oxide transistors can each have a back gate terminal shorted to one of its source-drain terminals, shorted to its front gate terminal, or configured to receive a bias voltage. Configured in this way, the gate driver circuit can exhibit less threshold voltage drift and thus improved device reliability over time.
    Type: Application
    Filed: May 8, 2024
    Publication date: December 19, 2024
    Inventors: Fan Gui, Chin-Wei Lin, Aida R Colon-Berrios, Ran Tu, Xuan Hu, Levent Erdal Aygun, Yi Zhao
  • Patent number: 11918830
    Abstract: The invention comprises a method and apparatus for tuning a charged particle beam path of a charged particle beam system used to treat a tumor of a patient, comprising the steps of: positioning a two-dimensional charged particle detector in a beam line downstream from a magnet pair; operating windings of the magnet pair at a first power level to generate a first magnetic field; measuring a beam position with the first two-dimensional charged particle detector; adjusting a correction magnetic field by driving voltage of a correction coil at a second power level, the second power level less than five percent of the first power level, where the first magnetic field and the correction magnetic field combine to yield an operational magnetic field; and the steps of measuring and adjusting the correction magnetic field changing the operational magnetic field to adjust a measured beam position toward a target beam position.
    Type: Grant
    Filed: July 21, 2021
    Date of Patent: March 5, 2024
    Inventors: Susan L. Michaud, Daniel J. Raymond, Artur Teymurazyan, Ran Tu
  • Patent number: 11918831
    Abstract: The invention comprises a method and apparatus for treating a tumor of a patient with positively charged particles, comprising the steps of transporting the positively charged particles along a beam transport path passing sequentially from an accelerator, through a beam transport line, through a nozzle, and toward a position of the patient, the step of transporting further comprising the steps of: (1) terminating a first Bragg peak, of a first set of the positively charged particles, in a position of the tumor and (2) flash treating the tumor with a second Bragg peak, of a second set of the positively charged particles, the second Bragg peak terminating post-patient relative to the nozzle. Optionally the second set of particles are delivered at a rate exceeding one MHz. Optionally, particles in common are used to both treat the tumor and image the tumor.
    Type: Grant
    Filed: September 1, 2021
    Date of Patent: March 5, 2024
    Inventors: Susan L. Michaud, Ran Tu, Daniel J. Raymond
  • Publication number: 20240066325
    Abstract: The invention comprises a method and apparatus for tuning a charged particle beam path of a charged particle beam system used to treat a tumor of a patient, comprising the steps of: positioning a two-dimensional charged particle detector in a beam line downstream from a magnet pair; operating windings of the magnet pair at a first power level to generate a first magnetic field; measuring a beam position with the first two-dimensional charged particle detector; adjusting a correction magnetic field by driving voltage of a correction coil at a second power level, the second power level less than five percent of the first power level, where the first magnetic field and the correction magnetic field combine to yield an operational magnetic field; and the steps of measuring and adjusting the correction magnetic field changing the operational magnetic field to adjust a measured beam position toward a target beam position.
    Type: Application
    Filed: November 7, 2023
    Publication date: February 29, 2024
    Inventors: Susan L. Michaud, Daniel J. Raymond, Artur Teymurazyan, Ran Tu
  • Patent number: 11854490
    Abstract: To reduce the amount of space occupied in the inactive area of a display by gate driver circuitry, at least a portion of the gate driver circuitry may be positioned in the active area of the display. To accommodate the gate driver circuitry, emissive sub-pixels may be laterally shifted relative to corresponding thin-film transistor sub-pixels. This allows for the thin-film transistor sub-pixels to be grouped adjacent to the central area of the active area, leaving room along an edge of the active area to accommodate one or more additional display components such as gate driver circuitry or fanout portions of data lines.
    Type: Grant
    Filed: August 2, 2022
    Date of Patent: December 26, 2023
    Assignee: Apple Inc.
    Inventors: Levent Erdal Aygun, Chin-Wei Lin, Yun Wang, Xin Lin, Aida R Colon-Berrios, Shih Chang Chang, Fan Gui, Mohammad Reza Esmaeili Rad, Ran Tu, Warren S Rieutort-Louis, Abbas Jamshidi Roudbari, Bhadrinarayana Lalgudi Visweswaran, Cheng-Chih Hsieh, Ricardo A Peterson, Shyuan Yang, Ting-Kuo Chang, Tsung-Ting Tsai, Yuchi Che
  • Publication number: 20230081342
    Abstract: A display may include an array of pixels. Each pixel in the array may include a drive transistor, emission transistors, a data loading transistor, a gate voltage setting transistor, an initialization transistor, an anode reset transistor, a storage capacitor, and an optional current boosting capacitor coupled in series with an isolation transistor. A data refresh may include a initialization phase, a threshold voltage sampling phase, and a data programming phase. The threshold voltage sampling phase can be substantially longer than the data programming phase to decrease a current sampling level during the threshold voltage sampling phase, which helps reduce the display luminance sensitivity to temperature variations. During a data refresh, the isolation transistor can be turned on to provide current boosting. During emission periods, the isolation transistor is turned off to prevent cathode noise from potentially coupling through to one or more direct-current voltage nodes in the pixel.
    Type: Application
    Filed: July 7, 2022
    Publication date: March 16, 2023
    Inventors: Chin-Wei Lin, Aida R Colon-Berrios, Fan Gui, Levent Erdal Aygun, Mohammad Reza Esmaeili Rad, Ran Tu, Xin Lin, Yun Wang
  • Patent number: 11592873
    Abstract: In some embodiments, a display stack includes a set of light-emitting elements, and a display backplane that includes a set of conductors and is electrically coupled to the set of light-emitting elements. A conductor in the set of conductors has a length, and a curved edge extending along at least a portion of the length. In some embodiments, a display stack includes a set of light-emitting elements; a set of transistors, electrically coupled to the set of light-emitting elements; and a set of conductors, electrically coupled to the set of transistors. The set of transistors may be electrically coupled to the set of conductors at a set of conductive pads. A plurality of conductive pads in the set of conductive pads is coupled to a single conductor in the set of conductors. The single conductor approaches different conductive pads in the plurality of conductive pads at different angles.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: February 28, 2023
    Assignee: Apple Inc.
    Inventors: Xiao Xiang, Tong Chen, Fan Gui, Mark T. Winkler, Ran Tu, Tsu-Hui Lin, Wenrui Cai, Yun Wang
  • Publication number: 20210393987
    Abstract: The invention comprises a method and apparatus for treating a tumor of a patient with positively charged particles, comprising the steps of transporting the positively charged particles along a beam transport path passing sequentially from an accelerator, through a beam transport line, through a nozzle, and toward a position of the patient, the step of transporting further comprising the steps of: (1) terminating a first Bragg peak, of a first set of the positively charged particles, in a position of the tumor and (2) flash treating the tumor with a second Bragg peak, of a second set of the positively charged particles, the second Bragg peak terminating post-patient relative to the nozzle. Optionally the second set of particles are delivered at a rate exceeding one MHz. Optionally, particles in common are used to both treat the tumor and image the tumor.
    Type: Application
    Filed: September 1, 2021
    Publication date: December 23, 2021
    Inventors: Susan L. Michaud, Ran Tu, Daniel J. Raymond
  • Publication number: 20210387022
    Abstract: The invention comprises a method and apparatus for aligning a charged particle beam path for treating a tumor of a patient, comprising: a cancer therapy system comprising the charged particle beam path sequentially passing: from an injector, through a synchrotron, along a beam transport line, and through a nozzle; a first two-dimensional detector configured to measure a beam state of positively charged particles; and an integrated intelligent system configured to classify the beam state into a set of beam shape factors, the integrated intelligent system configured to correct the beam shape through application of a condition-action rule: (1) adjusting a first voltage delivered to a first magnet positioned in the beam line prior to the first two-dimensional detector and (2) altering the beam shape through application of a second voltage to a second magnet position in the beam line adjacent to the first magnet.
    Type: Application
    Filed: July 23, 2021
    Publication date: December 16, 2021
    Inventors: Daniel J. Raymond, Artur Teymurazyan, Ran Tu, Susan L. Michaud
  • Publication number: 20210353966
    Abstract: The invention comprises a method and apparatus for tuning a charged particle beam path of a charged particle beam system used to treat a tumor of a patient, comprising the steps of: positioning a two-dimensional charged particle detector in a beam line downstream from a magnet pair; operating windings of the magnet pair at a first power level to generate a first magnetic field; measuring a beam position with the first two-dimensional charged particle detector; adjusting a correction magnetic field by driving voltage of a correction coil at a second power level, the second power level less than five percent of the first power level, where the first magnetic field and the correction magnetic field combine to yield an operational magnetic field; and the steps of measuring and adjusting the correction magnetic field changing the operational magnetic field to adjust a measured beam position toward a target beam position.
    Type: Application
    Filed: July 21, 2021
    Publication date: November 18, 2021
    Inventors: Susan L. Michaud, Daniel J. Raymond, Artur Teymurazyan, Ran Tu
  • Publication number: 20210255668
    Abstract: In some embodiments, a display stack includes a set of light-emitting elements, and a display backplane that includes a set of conductors and is electrically coupled to the set of light-emitting elements. A conductor in the set of conductors has a length, and a curved edge extending along at least a portion of the length. In some embodiments, a display stack includes a set of light-emitting elements; a set of transistors, electrically coupled to the set of light-emitting elements; and a set of conductors, electrically coupled to the set of transistors. The set of transistors may be electrically coupled to the set of conductors at a set of conductive pads. A plurality of conductive pads in the set of conductive pads is coupled to a single conductor in the set of conductors. The single conductor approaches different conductive pads in the plurality of conductive pads at different angles.
    Type: Application
    Filed: February 14, 2020
    Publication date: August 19, 2021
    Inventors: Xiao Xiang, Tong Chen, Fan Gui, Mark T. Winkler, Ran Tu, Tsu-Hui Lin, Wenrui Cai, Yun Wang