Patents by Inventor Qingxiang Li

Qingxiang Li 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: 10461395
    Abstract: An electronic device may have a display. A display cover layer and a transparent inner display member may overlap a display pixel layer. The display pixel layer may have an array of display pixels for displaying images for a user. A touch sensor layer may be interposed between the display pixel layer and the transparent display member. A ferromagnetic shielding layer may be mounted below the display pixel layer. A flexible printed circuit containing coils of metal signal lines that form a near-field communications loop antenna may be interposed between the ferromagnetic shielding layer and the display pixel layer. A non-near-field antenna such as an inverted-F antenna may have a resonating element mounted on an inner surface of the display cover layer. The resonating element may be interposed between the transparent display member and the display cover layer.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: October 29, 2019
    Assignee: Apple Inc.
    Inventors: Miroslav Samardzija, Yiren Wang, Yuehui Ouyang, Joseph Hakim, Qingxiang Li, Robert W. Schlub, Ruben Caballero, Siwen Yong, Erik G. de Jong
  • Publication number: 20190249778
    Abstract: Disclosed is a reduced-pressure type backflow preventer comprising a valve body (1), two check valves (2) of the same structure and a drain valve:(3) wherein a cavity is formed body, and a valve wall of the valve body is provided With a water inlet, a water outlet, and a drain opening; the two check valves are both fixedly mounted inside the valve body supporting member (4), and are positioned at the water inlet and the water outlet, respectively; the drain valve is mounted outside the valve body, and is positioned at the drain opening; the check valve comprises a valve seat (201), a valve clack (202), a rocking bar (203), and a twin torsional spring (204); one side of the valve clack is hinged to an upper end of the valve seat, and the other side is provided with a roller (205); the rocking bar is connected to a lower end of the valve seat via a pin (206); the roller abuts against the rocking bar and slides on the rocking bar; the twin torsional spring is sheathed over the pin; and a spring force of the twin
    Type: Application
    Filed: December 27, 2017
    Publication date: August 15, 2019
    Inventors: Dawen Huo, Bomin Wu, Jianlin Liang, Jianming Chen, Guohao He, Biao Li, Qingxiang Pan, Mingliang Huang, Jiaxian Ou
  • Patent number: 10218052
    Abstract: An electronic device may have hybrid antennas that include slot antenna resonating elements formed from slots in a ground plane and planar inverted-F antenna resonating elements. The planar inverted-F antenna resonating elements may each have a planar metal member that overlaps one of the slots. The slot of each slot antenna resonating element may divide the ground plane into first and second portions. A return path and feed may be coupled in parallel between the planar metal member and the first portion of the ground plane. Tunable components such as tunable inductors may be used to tune the hybrid antennas. A tunable inductor may bridge the slot in hybrid antenna, may be coupled between the planar metal member of the planar inverted-F antenna resonating element and the ground plane, or multiple tunable inductors may bridge the slot on opposing sides of the planar inverted-F antenna resonating element.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: February 26, 2019
    Assignee: Apple Inc.
    Inventors: Mattia Pascolini, Umar Azad, Rodney A. Gomez Angulo, Erdinc Irci, Qingxiang Li, Matthew A. Mow, Harish Rajagopalan, Miroslav Samardzija, Ming-Ju Tsai
  • Patent number: 10008764
    Abstract: An electronic device may have an antenna for providing coverage in wireless communications bands of interest such as a low frequency communications band and a high frequency communications band. The antenna may have an antenna ground and an antenna resonating element. The antenna resonating element may have a high band arm that contributes to a first high band resonance in the high band and may have a low band arm that exhibits a low band resonance in the low band. A passive filter that is coupled between first and second portions of the antenna resonating element may be configured to exhibit a short circuit impedance associated with a bypass path that allows the antenna resonating element to contribute to a second high band resonance in the high band. A tunable inductor coupled to the antenna resonating element may be used to tune the low band resonance.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: June 26, 2018
    Assignee: Apple Inc.
    Inventors: Yi Jiang, Siwen Yong, Gordon Coutts, Lijun Zhang, Qingxiang Li, Robert W. Schlub
  • Patent number: 9965052
    Abstract: A computer stylus may have an elongated body with a metal tube that serves as an antenna ground for an antenna. An antenna resonating element for the antenna may be formed from metal traces that wrap around a longitudinal axis for the elongated body. The antenna may be an inverted-F antenna. A ground antenna feed terminal for the inverted-F antenna may be coupled to the metal tube with a sheet metal member, conductive fabric, and solder. A clip may run along a side of the elongated body at a location that does not overlap the metal traces of the antenna resonating element. The antenna may be fed at a location on an opposing side of the elongated body from the clip. Antenna signals from the inverted-F antenna may be reflected towards the tip by metal structures at the end of the elongated body opposing the tip.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: May 8, 2018
    Assignee: Apple Inc.
    Inventors: Gordon Coutts, Qingxiang Li, Robert W. Schlub, Yi Jiang
  • Patent number: 9923272
    Abstract: An electronic device may include an adjustable power supply, at least one antenna, and associated antenna tuning circuitry. The antenna tuning circuitry may be an integral part of the antenna and may include a control circuit and at least one tunable element. The tunable element may include radio-frequency switches, continuously/semi-continuously adjustable components such as tunable resistors, inductors, and capacitors, and other load circuits that provide desired impedance characteristics. The power supply may provide power supply voltage signals to the antenna tuning circuitry via inductive coupling. The power supply voltage signals may be modulated according to a predetermined lookup table during device startup so that the control circuit is configured to generate desired control signals. These control signals adjust the tunable element so that the antenna can support wireless operation in desired frequency bands.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: March 20, 2018
    Assignee: Apple Inc.
    Inventors: Robert S. Sorensen, Qingxiang Li, Matthew A. Mow, Jinku Kim
  • Publication number: 20170309988
    Abstract: An electronic device may have a display. A display cover layer and a transparent inner display member may overlap a display pixel layer. The display pixel layer may have an array of display pixels for displaying images for a user. A touch sensor layer may be interposed between the display pixel layer and the transparent display member. A ferromagnetic shielding layer may be mounted below the display pixel layer. A flexible printed circuit containing coils of metal signal lines that form a near-field communications loop antenna may be interposed between the ferromagnetic shielding layer and the display pixel layer. A non-near-field antenna such as an inverted-F antenna may have a resonating element mounted on an inner surface of the display cover layer. The resonating element may be interposed between the transparent display member and the display cover layer.
    Type: Application
    Filed: June 16, 2017
    Publication date: October 26, 2017
    Inventors: Miroslav Samardzija, Yiren Wang, Yuehui Ouyang, Joseph Hakim, Qingxiang Li, Robert W. Schlub, Ruben Caballero, Siwen Yong, Erik G. de Jong
  • Patent number: 9766727
    Abstract: A computer stylus may have an elongated body with a tip and an opposing end having components such as a connector and an antenna. Metal structures for the antenna may be supported using a molded plastic support with metal traces or may be formed using flexible printed circuits or other structures. Metal and plastic tubes may be used in forming the body of the stylus. A metal tube may have an opening in which an antenna is mounted. A plastic tube may serve as an outer housing for the stylus and may cover the metal tube and the opening in which the antenna is mounted. A transmission line such as a cable may be coupled to an antenna feed. The cable may pass through an opening in the metal tube and may be covered using a strip of conductive foam.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: September 19, 2017
    Assignee: Apple Inc.
    Inventors: Yi Jiang, Huan-Chu Huang, Mattia Pascolini, Qingxiang Li
  • Patent number: 9728858
    Abstract: An electronic device may be provided with hybrid planar inverted-F slot antennas and indirectly fed slot antennas. A hybrid antenna may be used to form a dual band wireless local area network antenna. An indirectly fed slot antenna may be use to form a cellular telephone antenna. Antenna slots may be formed in a metal electronic device housing wall. The housing wall may have a planar rear portion and sidewall portions that extend upwards from the planar rear portion. The slots may have one or more bends. A hybrid antenna may have a slot antenna portion and a planar inverted-F antenna portion. The planar inverted-F antenna portion may have a metal resonating element patch that is supported by a support structure. The support structure may be a plastic speaker box containing a speaker driver that is not overlapped by the metal resonating element patch.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: August 8, 2017
    Assignee: Apple Inc.
    Inventors: Jiang Zhu, Rodney A. Gomez Angulo, Qingxiang Li, Robert W. Schlub, Hongfei Hu
  • Patent number: 9685690
    Abstract: An electronic device may have a display. A display cover layer and a transparent inner display member may overlap a display pixel layer. The display pixel layer may have an array of display pixels for displaying images for a user. A touch sensor layer may be interposed between the display pixel layer and the transparent display member. A ferromagnetic shielding layer may be mounted below the display pixel layer. A flexible printed circuit containing coils of metal signal lines that form a near-field communications loop antenna may be interposed between the ferromagnetic shielding layer and the display pixel layer. A non-near-field antenna such as an inverted-F antenna may have a resonating element mounted on an inner surface of the display cover layer. The resonating element may be interposed between the transparent display member and the display cover layer.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: June 20, 2017
    Assignee: Apple Inc.
    Inventors: Miroslav Samardzija, Yiren Wang, Yuehui Ouyang, Joseph Hakim, Qingxiang Li, Robert W. Schlub, Ruben Caballero, Siwen Yong, Erik G. de Jong
  • Patent number: 9680205
    Abstract: An electronic device may be provided with electrical components mounted in a housing. The electronic device may include wireless transceiver circuitry and antenna structures. A display may be mounted in the housing. The display may have a transparent layer such as display cover layer. The display cover layer may have an inner surface with a recess. The recess may be a groove that runs along a peripheral edge of the display cover layer. An antenna structure such as an inverted-F antenna resonating element may be formed from a metal trace on a plastic support structure. The metal trace and support structure may be mounted in the groove with adhesive. The housing may be a metal housing that forms an antenna ground. Springs may be used in forming an antenna feed and an antenna return path that couples the antenna resonating element to ground.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: June 13, 2017
    Assignee: Apple Inc.
    Inventors: Qingxiang Li, Robert W. Schlub, Erik G. de Jong, Yuehui Ouyang, Siwen Yong, Miroslav Samardzija, Yiren Wang, Jiang Zhu
  • Publication number: 20170149127
    Abstract: Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and antenna structures. The antenna structures may include antennas such as inverted-F antennas that contain antenna resonating elements and antenna ground elements. Antenna resonating elements may be formed from patterned conductive traces on substrates such as flex circuit substrates. Antenna ground elements may be formed from conductive device structures such as metal housing walls. Support and biasing structures such as dielectric support members and layer of foam may be used to support and bias antenna resonating elements against planar device structures. The planar device structures against which the antenna resonating elements are biased may be planar dielectric members such as transparent layers of display cover glass or other planar structures.
    Type: Application
    Filed: February 3, 2017
    Publication date: May 25, 2017
    Inventors: Qingxiang Li, Robert W. Schlub, Fletcher R. Rothkopf, Adam D. Mittleman, Yi Jiang, Emily McMilin, Li-jun Zhang
  • Patent number: 9583838
    Abstract: An electronic device may be provided with antennas. Antennas for the electronic device may be formed from slot antenna structures. A slot antenna structure may be formed from portions of a metal housing for an electronic device. The slots of the slot antenna structures may be indirectly fed to form first and second indirectly fed slot antennas. The first and second indirectly fed slot antennas may be formed from slots in a rear surface of an electronic device and a sidewall of the electronic device. The slots may have open ends along an edge of the sidewall and may have closed ends that face each other. A hybrid antenna may also be formed in the electronic device.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: February 28, 2017
    Assignee: Apple Inc.
    Inventors: Jiang Zhu, Harish Rajagopalan, Rodney A. Gomez Angulo, Qingxiang Li, Robert W. Schlub, John Raff
  • Patent number: 9577315
    Abstract: Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry and antenna structures. The antenna structures may include antennas such as inverted-F antennas that contain antenna resonating elements and antenna ground elements. Antenna resonating elements may be formed from patterned conductive traces on substrates such as flex circuit substrates. Antenna ground elements may be formed from conductive device structures such as metal housing walls. Support and biasing structures such as dielectric support members and layer of foam may be used to support and bias antenna resonating elements against planar device structures. The planar device structures against which the antenna resonating elements are biased may be planar dielectric members such as transparent layers of display cover glass or other planar structures.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: February 21, 2017
    Assignee: Apple Inc.
    Inventors: Qingxiang Li, Robert W. Schlub, Fletcher R. Rothkopf, Adam D. Mittleman, Yi Jiang, Emily McMilin, Li-jun Zhang
  • Patent number: 9559406
    Abstract: An electronic device has antennas formed from cavity antenna structures. The electronic device may have a metal housing. The metal housing may have an upper housing in which a component such as a display is mounted and a lower housing in which a component such as a keyboard is mounted. Hinges may be used to mount the upper housing to the lower housing for rotation about a rotational axis. Cavity antennas may be formed in a clutch barrel region located between the hinges and running along the rotational axis. A flexible printed circuit may be formed between the cavity antennas. Each cavity antenna may have a first end that is adjacent to one of the hinges and a second end that is adjacent to the flexible printed circuit. Cavity walls for the cavity antennas may be formed from metal housing structures such as metal portions of the lower housing.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: January 31, 2017
    Assignee: Apple Inc.
    Inventors: Jerzy Guterman, Qingxiang Li, Mattia Pascolini
  • Patent number: 9559425
    Abstract: An electronic device may be provided with slot antennas. A slot antenna may be formed from metal structures that have a dielectric gap defining an antenna slot. The metal structures may include multiple metal layers that overlap a plastic antenna window and that serve as capacitive electrodes in a capacitive proximity sensor. The metal structures may also include a metal electronic device housing. The metal electronic device housing and the metal layers may be formed on opposing sides of the antenna slot. The metal layers may have a notch that locally widens the antenna slot at an open end of the antenna slot. One of the metal layers may be shorted to the metal electronic device housing at an opposing closed end of the antenna slot. The antenna slot may be indirectly fed using a near-field-coupled antenna feed structure such as a metal patch that overlaps the antenna slot.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: January 31, 2017
    Assignee: Apple Inc.
    Inventors: Jiang Zhu, Rodney A. Gomez Angulo, Qingxiang Li
  • Publication number: 20170010697
    Abstract: A computer stylus may have an elongated body with a tip and an opposing end having components such as a connector and an antenna. Metal structures for the antenna may be supported using a molded plastic support with metal traces or may be formed using flexible printed circuits or other structures. Metal and plastic tubes may be used in forming the body of the stylus. A metal tube may have an opening in which an antenna is mounted. A plastic tube may serve as an outer housing for the stylus and may cover the metal tube and the opening in which the antenna is mounted. A transmission line such as a cable may be coupled to an antenna feed. The cable may pass through an opening in the metal tube and may be covered using a strip of conductive foam.
    Type: Application
    Filed: July 6, 2015
    Publication date: January 12, 2017
    Inventors: Yi Jiang, Huan-Chu Huang, Mattia Pascolini, Qingxiang Li
  • Patent number: 9543660
    Abstract: An electronic device may be provided with wireless circuitry. The wireless circuitry may include cavity antennas. A cavity antenna may be formed from a metal antenna cavity and resonating element structures. The metal antenna cavity may be formed from metal traces on a dielectric carrier. The resonating element structures may include directly fed and indirectly fed slot antenna resonating elements and monopole antenna resonating elements. The metal antenna cavity may exhibit a resonance that is tuned using a transmission line tuning stub. Filters and duplexer circuits may be used in routing signals at different frequency bands among the antenna resonating elements.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: January 10, 2017
    Assignee: Apple Inc.
    Inventors: Harish Rajagopalan, Huan-Chu Huang, Ke Sun, Qingxiang Li, Robert W. Schlub, Rodney A. Gomez Angulo, Umar Azad
  • Publication number: 20170005397
    Abstract: An electronic device may have an antenna for providing coverage in wireless communications bands of interest such as a low frequency communications band and a high frequency communications band. The antenna may have an antenna ground and an antenna resonating element. The antenna resonating element may have a high band arm that contributes to a first high band resonance in the high band and may have a low band arm that exhibits a low band resonance in the low band. A passive filter that is coupled between first and second portions of the antenna resonating element may be configured to exhibit a short circuit impedance associated with a bypass path that allows the antenna resonating element to contribute to a second high band resonance in the high band. A tunable inductor coupled to the antenna resonating element may be used to tune the low band resonance.
    Type: Application
    Filed: September 13, 2016
    Publication date: January 5, 2017
    Inventors: Yi Jiang, Siwen Yong, Gordon Coutts, Lijun Zhang, Qingxiang Li, Robert W. Schlub
  • Publication number: 20160380333
    Abstract: A portable computing device is disclosed. The portable computing device can take many forms such as a laptop computer, a tablet computer, and no on. The portable computing device can include a single piece housing formed from a radio opaque material with a cover formed from a radio transparent material. To implement a wireless interface, an antenna stack-up can be provided that allows an antenna to be mounted to a bottom of the cover. Methods and apparatus are provided for improving wireless performance. For instance, in one embodiment, a metal housing can be thinned to improve antenna performance. As another example, a faraday cage can be formed around speaker drivers to improve antenna performance.
    Type: Application
    Filed: September 12, 2016
    Publication date: December 29, 2016
    Inventors: Erik A. Uttermann, Jeremy C. Franklin, Stephen C. McClure, Sean S. Corbin, Qingxiang Li, Rodney A. Gomez Angulo