Patents by Inventor Zhi Zhu

Zhi Zhu 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: 11279628
    Abstract: Previous hybrid-anion and cation-redox (HACR) cathodes were limited in cycling performance by irreversible anionic redox reactions caused by the loss of anions. To overcome this limitation, a lithium (Li) transition metal (M) oxide particle is described having a Li concentration gradient. In one example, the particle includes a Li-rich core region that provides capacity and energy density due anionic and cationic contributions and a Li-poor surface region surrounding the core region to inhibit anionic activity and thus substantially reduce the loss of anions. A gradient region disposed between the core and surface regions has a Li concentration profile that varies from a first Li concentration in the core region to a second Li concentration in the surface region. A high-temperature leaching method may be used to leach LiO from a Li-rich Li1+xM1?XO2 particle, thus forming a coherent Li gradient with a stabilized layered structure.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: March 22, 2022
    Assignee: Massachusetts Institute of Technology
    Inventors: Ju Li, Zhi Zhu
  • Publication number: 20220077830
    Abstract: A receiver including a first differential sense amplifier configured to amplify an input differential data signal to generate an output differential data signal; a first set of one or more differential decision feedback equalizer (DFE) taps configured to modify the output differential data signal based on a set of one or more differential tap signals, wherein the first set of one or more differential DFE taps affect an output common mode voltage associated with the output differential data signal; and a compensation circuit configured to adjusts the output common mode voltage to compensate for the effect on the output common mode voltage by the set of one or more differential DFE taps. The compensation circuit includes reference and replica receivers to generate reference and replica output common mode voltages, and a feedback circuit to adjust the output common mode voltage based on the reference and replica output common mode voltages.
    Type: Application
    Filed: September 10, 2020
    Publication date: March 10, 2022
    Inventors: Ying DUAN, Jing WU, Zhi ZHU
  • Publication number: 20210331344
    Abstract: The present disclosure provides a film cutting method, a film cutting device, a composite film, a backlight module and a display device. The film material cutting method includes: using a cutting tool provided with a viscous material to cut a composite film that includes at least two laminated optical films, with the viscous material on the cutting tool being transferred to a cutting end surface of the composite film during cutting; and, curing the viscous material on the cutting end surface.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 28, 2021
    Applicants: HEFEI BOE DISPLAY LIGHTING CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Peina WANG, Zhi ZHU
  • Patent number: 11152230
    Abstract: An apparatus and method for bonding alignment are provided. The apparatus for bonding alignment includes a press assembly and an objective lens group (105) disposed on one side of the press assembly. The press assembly includes a first chuck (103) and a rotatable second chuck (104). When support surfaces of the first and second chucks are not parallel to each other, the second chuck is rotated to make the two support surfaces parallel. A first substrate (301) is then loaded on the first chuck, and alignment marks (302) on the first substrate are observed using the objective lens group disposed on one side of the press assembly. A second substrate (501) is loaded on the second chuck, and alignment marks (502) on the second substrate are also observed with the objective lens group. Based on an observation result by the objective lens group, the two substrates are moved so that the alignment marks thereon are aligned and hence the two substrates themselves are aligned.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: October 19, 2021
    Assignee: SHANGHAI MICRO ELECTRONICS EQUIPMENT (GROUP) CO., LTD.
    Inventors: Zhi Zhu, Jianjun Zhao, Zhijun Huo
  • Patent number: 10985044
    Abstract: A machine vision system for substrate alignment includes first and second illumination sources (11, 12), first and second reflectors (21, 22), first and second objective lenses (31, 32) and first and second detectors (41, 42), each of which pair is symmetric with respect to an X-axis. Light beams emitted from the first and second illumination sources are irradiated on and reflected by respective substrates (1, 2), amplified by the respective objective lenses and received and detected by the respective detectors. An alignment apparatus is also disclosed. Disposing each of the pair of the first and second illumination sources, the first and second reflectors, the first and second objective lenses and the first and second detectors in symmetry with respect to the X-axis results in a significantly reduced footprint of the machine vision system along the orientation of lens barrels of the objective lenses and hence an expanded detection range thereof and improved alignment efficiency and accuracy.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: April 20, 2021
    Assignee: Shanghai Micro Electronics Equipment (Group) Co., Ltd.
    Inventors: Zhi Zhu, Zhijun Huo
  • Patent number: 10965442
    Abstract: A receiver is provided that includes a time-to-digital converter for converting a phase difference between a clock signal and a received data signal into a phase-difference digital code. The receiver also includes a logic circuit that controls a programmable delay line to delay the clock signal into a delayed clock signal by a delay that is responsive to a difference between the phase-difference code and a unit interval for the clock signal. The delayed clock signal clocks a flip-flop to register the received data signal.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: March 30, 2021
    Assignee: QUALCOMM INCORPORATED
    Inventors: Eskinder Hailu, Bupesh Pandita, Jon Boyette, Hadi Goudarzi, Yong Suk Jun, Zhi Zhu, Minhan Chen
  • Patent number: 10944386
    Abstract: Certain aspects of the present disclosure generally relate to techniques and apparatus for doubling the frequency of a signal. For example, certain aspects are directed to a phase frequency detector (PFD)-based rising-edge-delay-only frequency doubling circuit. One example frequency doubler circuit generally includes a first delay stage, a second delay stage, a first PFD, a first rising-edge-only adjustable delay cell, a second PFD, a second rising-edge-only adjustable delay cell a logic gate, and a comparator configured to compare a direct-current (DC) voltage value of an output of the logic gate with a reference voltage and control the first and second rising-edge-only adjustable delay cells based on the comparison.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: March 9, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Jing Wu, Ying Duan, Zhi Zhu
  • Publication number: 20200239328
    Abstract: Previous hybrid-anion and cation-redox (HACR) cathodes were limited in cycling performance by irreversible anionic redox reactions caused by the loss of anions. To overcome this limitation, a lithium (Li) transition metal (M) oxide particle is described having a Li concentration gradient. In one example, the particle includes a Li-rich core region that provides capacity and energy density due anionic and cationic contributions and a Li-poor surface region surrounding the core region to inhibit anionic activity and thus substantially reduce the loss of anions. A gradient region disposed between the core and surface regions has a Li concentration profile that varies from a first Li concentration in the core region to a second Li concentration in the surface region. A high-temperature leaching method may be used to leach LiO from a Li-rich Li1+xM1?XO2 particle, thus forming a coherent Li gradient with a stabilized layered structure.
    Type: Application
    Filed: November 18, 2019
    Publication date: July 30, 2020
    Inventors: Ju Li, Zhi Zhu
  • Patent number: 10719476
    Abstract: An apparatus and methods are disclosed for a bidirectional front-end circuit included within a system on chip (SoC). The bidirectional front-end circuit includes a differential bidirectional terminal for receiving and transmitting signals. The bidirectional front-end circuit is configured to provide a first communication path between a first controller and a connector through the differential bidirectional terminal when operating in a first mode. And, the bidirectional front-end circuit is reconfigured to provide a second communication path between a second controller and the connector through the differential bidirectional terminal when operating in a second mode.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: July 21, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Zhi Zhu, Xiaohua Kong, Nir Gerber, Christian Josef Wiesner
  • Patent number: 10698439
    Abstract: In certain aspects, an apparatus includes a multiplexer having a first input, a second input, a select input, and an output, wherein the first input is configured to receive a first reference clock signal, the second input is configured to receive a second reference clock signal, and the select input is configured to receive a select signal. The multiplexer is configured to select one of the first and second reference clock signals based on the select signal, and output the selected one of the first and second reference clock signals at the output of the multiplexer. The apparatus also includes a clock driver having an input and an output, wherein the input of the clock driver is coupled to the output of the multiplexer.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: June 30, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Li Sun, Russell Deans, Zhiqin Chen, Zhi Zhu
  • Publication number: 20200106597
    Abstract: A receiver is provided that includes a time-to-digital converter for converting a phase difference between a clock signal and a received data signal into a phase-difference digital code. The receiver also includes a logic circuit that controls a programmable delay line to delay the clock signal into a delayed clock signal by a delay that is responsive to a difference between the phase-difference code and a unit interval for the clock signal. The delayed clock signal clocks a flip-flop to register the received data signal.
    Type: Application
    Filed: October 2, 2018
    Publication date: April 2, 2020
    Inventors: Eskinder Hailu, Bupesh Pandita, Jon Boyette, Hadi Goudarzi, Yong Suk Jun, Zhi Zhu, Minhan Chen
  • Publication number: 20200090971
    Abstract: A machine vision system for substrate alignment includes first and second illumination sources (11, 12), first and second reflectors (21, 22), first and second objective lenses (31, 32) and first and second detectors (41, 42), each of which pair is symmetric with respect to an X-axis. Light beams emitted from the first and second illumination sources are irradiated on and reflected by respective substrates (1, 2), amplified by the respective objective lenses and received and detected by the respective detectors. An alignment apparatus is also disclosed. Disposing each of the pair of the first and second illumination sources, the first and second reflectors, the first and second objective lenses and the first and second detectors in symmetry with respect to the X-axis results in a significantly reduced footprint of the machine vision system along the orientation of lens barrels of the objective lenses and hence an expanded detection range thereof and improved alignment efficiency and accuracy.
    Type: Application
    Filed: July 27, 2017
    Publication date: March 19, 2020
    Inventors: Zhi ZHU, Zhijun HUO
  • Publication number: 20200090962
    Abstract: An apparatus and method for bonding alignment are provided. The apparatus for bonding alignment includes a press assembly and an objective lens group (105) disposed on one side of the press assembly. The press assembly includes a first chuck (103) and a rotatable second chuck (104). When support surfaces of the first and second chucks are not parallel to each other, the second chuck is rotated to make the two support surfaces parallel. A first substrate (301) is then loaded on the first chuck, and alignment marks (302) on the first substrate are observed using the objective lens group disposed on one side of the press assembly. A second substrate (501) is loaded on the second chuck, and alignment marks (502) on the second substrate are also observed with the objective lens group. Based on an observation result by the objective lens group, the two substrates are moved so that the alignment marks thereon are aligned and hence the two substrates themselves are aligned.
    Type: Application
    Filed: July 27, 2017
    Publication date: March 19, 2020
    Inventors: Zhi ZHU, Jianjun ZHAO, Zhijun HUO
  • Publication number: 20200028206
    Abstract: A solid oxygen-redox nanocomposite material including an alkali metal oxide, peroxide, or superoxide, or alkaline earth metal oxide, peroxide, or superoxide core, and a catalytic nanoshell or skeleton surrounding the cores, as well as methods of manufacture, are described. Additionally, sealed electrochemical devices including a solid oxygen-redox nanocomposite are also described.
    Type: Application
    Filed: December 13, 2016
    Publication date: January 23, 2020
    Applicant: MASSACHUSETS INSTITUTE OF TECHNOLOGY
    Inventors: Zhi Zhu, Ju Li
  • Patent number: 10353131
    Abstract: A device, a system, a backlight module and a test method for simulating a light guide plate, the device for simulating a light guide plate includes: a light guide substrate layer; and an electroactive polymer layer, wherein the electroactive polymer layer is formed on the light guide substrate layer and is configured to produce a deformation according to a layout signal of dot-patterns to simulate the dot-patterns.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: July 16, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE DISPLAY LIGHTING CO., LTD.
    Inventors: Yejia Qian, Dejun Li, Yinyan Xue, Yang Yang, Zhi Zhu, Zhi Yang, Shanzhi Hu, Fei Wei
  • Patent number: 10329849
    Abstract: The present invention relates to a multi-functional drilling experiment platform, which consists of a gantry, a hydraulic cylinder, a power swivel and a platform base. The gantry mainly realizes the control of the drill string during the drilling-in process. In order to simulate the vertical well, the inclined well, and the horizontal well, the drilling machine needs to rotate between 0° and 90°. The rotation of the gantry is realized by the extension and contraction of the hydraulic cylinder. The platform base is used to set up the gantry and the hydraulic cylinder, bearing the pulling, pressing and twisting loads of drilling experiments. Also, the platform base can move along the track to achieve different types of experiments. The multi-functional drilling experiment platform of the present invention realizes the load simulation experiment of the drilling machine at different angles using the gantry and the hydraulic cylinder.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: June 25, 2019
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Jialin Tian, Zhi Zhu, Ping Chen, Dejie Chen, Yanniu Ren, Qiang Wang
  • Publication number: 20190078395
    Abstract: The present invention relates to a multi-functional drilling experiment platform, which consists of a gantry, a hydraulic cylinder, a power swivel and a platform base. The gantry mainly realizes the control of the drill string during the drilling-in process. In order to simulate the vertical well, the inclined well, and the horizontal well, the drilling machine needs to rotate between 0° and 90°. The rotation of the gantry is realized by the extension and contraction of the hydraulic cylinder. The platform base is used to set up the gantry and the hydraulic cylinder, bearing the pulling, pressing and twisting loads of drilling experiments. Also, the platform base can move along the track to achieve different types of experiments. The multi-functional drilling experiment platform of the present invention realizes the load simulation experiment of the drilling machine at different angles using the gantry and the hydraulic cylinder.
    Type: Application
    Filed: June 8, 2017
    Publication date: March 14, 2019
    Applicant: Southwest Petroleum University
    Inventors: Jialin TIAN, Zhi ZHU, Ping CHEN, Dejie CHEN, Yanniu REN, Qiang WANG
  • Publication number: 20180349311
    Abstract: An apparatus and methods are disclosed for a bidirectional front-end circuit included within a system on chip (SoC). The bidirectional front-end circuit includes a differential bidirectional terminal for receiving and transmitting signals. The bidirectional front-end circuit is configured to provide a first communication path between a first controller and a connector through the differential bidirectional terminal when operating in a first mode. And, the bidirectional front-end circuit is reconfigured to provide a second communication path between a second controller and the connector through the differential bidirectional terminal when operating in a second mode.
    Type: Application
    Filed: August 8, 2018
    Publication date: December 6, 2018
    Inventors: Zhi Zhu, Xiaohua Kong, Nir Gerber, Christian Josef Wiesner
  • Patent number: 10139544
    Abstract: Disclosed is a light guide plate, a back plate, an edge-lit type backlight module and a display device. The light guide plate includes a main body and an extending part, wherein the extending part is disposed on a sidewall of the main body and extending outwardly, and the extending part and the sidewall of the main body define a space for accommodating a backlight source.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: November 27, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE DISPLAY LIGHTING CO., LTD.
    Inventors: Zhi Zhu, Yinyan Xue, Yang Yang, Zhi Yang, Yeshun Xu
  • Patent number: 10084621
    Abstract: Systems and methods for adjusting a phase step size of a clock data recover (CDR) circuit are described according to aspects of the present disclosure. In certain aspects, a method for adjusting a phase step size of a CDR circuit includes sensing a frequency offset of the CDR circuit, and adjusting the phase step size of the CDR circuit based on the sensed frequency offset. The frequency offset may be sensed by sensing a signal level on an integration path of a loop filter of the CDR circuit. The phase step size of the CDR circuit may be adjusted by switching the CDR circuit between a first phase step size and a second phase step size using a modulator (e.g., a sigma-delta modulator).
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: September 25, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Yu Song, Zhi Zhu, Miao Li, Li Sun, Deqiang Song, Chia Heng Chang