Patents by Inventor Dianbo Guo

Dianbo Guo 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: 12104934
    Abstract: An electronic device is described. The electronic device may include a housing, a rotatable crown, and a self-mixing interferometry (SMI) sensor positioned within the housing. The rotatable crown may include an array of retroreflective surface features that reflect incident light back to a light source. Each retroreflective surface feature of the array of retroreflective surface features may be formed as a corner-cube with three perpendicular faces. The SMI sensor or associated processing electronics may compare originally emitted light with reflected light to identify a movement or distance of the rotatable crown with respect to the SMI sensor.
    Type: Grant
    Filed: May 1, 2023
    Date of Patent: October 1, 2024
    Assignee: Apple Inc.
    Inventors: Xin Li, Damon R. Lemmon, David D. Dashevsky, Dianbo Guo, Peng Zhao, Ruonan Yang
  • Publication number: 20240159884
    Abstract: An optical sensor module includes a housing, an optical emitter, a photodetector, a sensor circuit, and an optical crosstalk compensation circuit. The optical emitter is configured to emit electromagnetic radiation toward and through the housing. The photodetector is configured to provide a photocurrent to an output node. The photocurrent is responsive to a receipt of first portions of the electromagnetic radiation redirected by an intended target and received through the housing, and second portions of the electromagnetic radiation redirected by an unintended target or received directly from the optical emitter. The sensor circuit is connected to the output node and configured to generate a sensor output. The optical crosstalk compensation circuit is configured to inject a bias current into the output node or the sensor circuit.
    Type: Application
    Filed: October 23, 2023
    Publication date: May 16, 2024
    Inventors: Dianbo Guo, Mengshu Huang
  • Publication number: 20230258479
    Abstract: An electronic device is described. The electronic device may include a housing, a rotatable crown, and a self-mixing interferometry (SMI) sensor positioned within the housing. The rotatable crown may include an array of retroreflective surface features that reflect incident light back to a light source. Each retroreflective surface feature of the array of retroreflective surface features may be formed as a corner-cube with three perpendicular faces. The SMI sensor or associated processing electronics may compare originally emitted light with reflected light to identify a movement or distance of the rotatable crown with respect to the SMI sensor.
    Type: Application
    Filed: May 1, 2023
    Publication date: August 17, 2023
    Inventors: Xin Li, Damon R. Lemmon, David D. Dashevsky, Dianbo Guo, Peng Zhao, Ruonan Yang
  • Patent number: 11674825
    Abstract: An electronic device is described. The electronic device may include a housing, a rotatable crown, and a self-mixing interferometry (SMI) sensor positioned within the housing. The rotatable crown may include an array of retroreflective surface features that reflect incident light back to a light source. Each retroreflective surface feature of the array of retroreflective surface features may be formed as a corner-cube with three perpendicular faces. The SMI sensor or associated processing electronics may compare originally emitted light with reflected light to identify a movement or distance of the rotatable crown with respect to the SMI sensor.
    Type: Grant
    Filed: September 21, 2021
    Date of Patent: June 13, 2023
    Assignee: Apple Inc.
    Inventors: Xin Li, Damon R. Lemmon, David D. Dashevsky, Dianbo Guo, Peng Zhao, Ruonan Yang
  • Publication number: 20230086536
    Abstract: An electronic device is described. The electronic device may include a housing, a rotatable crown, and a self-mixing interferometry (SMI) sensor positioned within the housing. The rotatable crown may include an array of retroreflective surface features that reflect incident light back to a light source. Each retroreflective surface feature of the array of retroreflective surface features may be formed as a corner-cube with three perpendicular faces. The SMI sensor or associated processing electronics may compare originally emitted light with reflected light to identify a movement or distance of the rotatable crown with respect to the SMI sensor.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 23, 2023
    Inventors: Xin Li, Damon R. Lemmon, David D. Dashevsky, Dianbo Guo, Peng Zhao, Ruonan Yang
  • Patent number: 10534489
    Abstract: A capacitive discharge circuit includes a line having a capacitance, a switched capacitor circuit including a capacitor, a switched circuit coupled to the line, and a voltage regulator coupled between the switched capacitor circuit and the switched circuit. A controller operates the switched capacitor circuit and switched circuit to in a first phase, charge the capacitor by coupling the capacitor between a common mode and a power supply, and in a second phase, discharge the capacitor by coupling the voltage regulator in series with the capacitor between the power supply node a ground. The controller is also configured to in a third phase, charge the capacitor by coupling the capacitor between the common mode and the power supply, and in a fourth phase, share charge between the line and the capacitor by coupling the voltage regulator and the capacitor in series between the line and the ground.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: January 14, 2020
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Chee Weng Cheong, Dianbo Guo, Kien Beng Tan, Yannick Guedon
  • Patent number: 10512157
    Abstract: An electronic device may be provided with a display. An opaque layer may be formed on an inner surface of a display cover layer in an inactive area of the display. An optical component window may be formed from the opening and may be aligned with an ambient light sensor such as a color ambient light sensor. The color ambient light sensor may have photodetectors on a light detector integrated circuit. Electrostatic shielding may be incorporated into the color ambient light sensor to prevent perturbations in the output of the color ambient light sensor due to the presence of electrostatic charge in the vicinity of the optical component window. The shielding may include a grounded shield layer on a surface of an ambient light sensor support structure that faces the display cover layer and may include a transparent shield layer overlapping the photodetectors.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: December 17, 2019
    Assignee: Apple Inc.
    Inventors: Dianbo Guo, Dong Zheng
  • Patent number: 10394349
    Abstract: A system and method for synchronizing two devices in communication with each other. When communication between the two devices is to be established, a synchronization process may be invoked. In an embodiment, a first device may initiate sending synchronization signals having rising edge and falling edge pairs. The second device may include a controller configured to receive the synchronization signals. However, noise may inhibit the ability of the controller to correctly receive and/or interpret the synchronization signals. Noise may cause detection components to falsely detect noise as a synchronization signal or may cause detection components to miss detection of an actual synchronization signal. A window generator may be used to generate comparison windows for the controller to detect synchronization signals.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: August 27, 2019
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Chee Weng Cheong, Leonard Liviu Dinu, Dianbo Guo, Kien Beng Tan
  • Publication number: 20190098748
    Abstract: An electronic device may be provided with a display. An opaque layer may be formed on an inner surface of a display cover layer in an inactive area of the display. An optical component window may be formed from the opening and may be aligned with an ambient light sensor such as a color ambient light sensor. The color ambient light sensor may have photodetectors on a light detector integrated circuit. Electrostatic shielding may be incorporated into the color ambient light sensor to prevent perturbations in the output of the color ambient light sensor due to the presence of electrostatic charge in the vicinity of the optical component window. The shielding may include a grounded shield layer on a surface of an ambient light sensor support structure that faces the display cover layer and may include a transparent shield layer overlapping the photodetectors.
    Type: Application
    Filed: September 22, 2017
    Publication date: March 28, 2019
    Inventors: Dianbo Guo, Dong Zheng
  • Patent number: 10209844
    Abstract: A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: February 19, 2019
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo
  • Patent number: 10185454
    Abstract: An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: January 22, 2019
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Praveesh Chandran, Baranidharan Karuppusamy, Giuseppe Noviello, Chee Weng Cheong, Leonard Liviu Dinu, Dianbo Guo, Kien Beng Tan, Chaochao Zhang
  • Publication number: 20180275802
    Abstract: A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
    Type: Application
    Filed: June 1, 2018
    Publication date: September 27, 2018
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo
  • Publication number: 20180232071
    Abstract: A system and method for synchronizing two devices in communication with each other. When communication between the two devices is to be established, a synchronization process may be invoked. In an embodiment, a first device may initiate sending synchronization signals having rising edge and falling edge pairs. The second device may include a controller configured to receive the synchronization signals. However, noise may inhibit the ability of the controller to correctly receive and/or interpret the synchronization signals. Noise may cause detection components to falsely detect noise as a synchronization signal or may cause detection components to miss detection of an actual synchronization signal. A window generator may be used to generate comparison windows for the controller to detect synchronization signals.
    Type: Application
    Filed: April 13, 2018
    Publication date: August 16, 2018
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Chee Weng CHEONG, Leonard Liviu DINU, Dianbo GUO, Kien Beng TAN
  • Patent number: 10013130
    Abstract: A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: July 3, 2018
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo
  • Patent number: 9990091
    Abstract: A charge sensing circuit generates a voltage in a sensing period that is indicative of sensed charge. The generated voltages are accumulated by an accumulator circuit over a number of sensing periods. A noise detection circuit senses when the voltage generated by the charge sensing circuit is outside of a boundary and generates a detection signal in response thereto. A control circuit, in response to the detection signal, controls the accumulator circuit to block accumulation of the voltages generated by the charge sensing circuit during at least the sensing period in which the detection signal is generated. An analog-to-digital converter circuit then converts an accumulated output voltage from the accumulator circuit to a digital value at the end of an accumulation time period that includes the sensing periods. The end of the accumulation time period is delayed by at least one sensing period in response to the detection signal.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: June 5, 2018
    Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTD
    Inventors: Chee Weng Cheong, EngJye Ng, Dianbo Guo, Chaochao Zhang, Kusuma Adi Ningrat
  • Patent number: 9971421
    Abstract: A system and method for synchronizing two devices in communication with each other. When communication between the two devices is to be established, a synchronization process may be invoked. In an embodiment, a first device may initiate sending synchronization signals having rising edge and falling edge pairs. The second device may include a controller configured to receive the synchronization signals. However, noise may inhibit the ability of the controller to correctly receive and/or interpret the synchronization signals. Noise may cause detection components to falsely detect noise as a synchronization signal or may cause detection components to miss detection of an actual synchronization signal. A window generator may be used to generate comparison windows for the controller to detect synchronization signals.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: May 15, 2018
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Chee Weng Cheong, Leonard Liviu Dinu, Dianbo Guo, Kien Beng Tan
  • Publication number: 20180101264
    Abstract: A capacitive discharge circuit includes a line having a capacitance, a switched capacitor circuit including a capacitor, a switched circuit coupled to the line, and a voltage regulator coupled between the switched capacitor circuit and the switched circuit. A controller operates the switched capacitor circuit and switched circuit to in a first phase, charge the capacitor by coupling the capacitor between a common mode and a power supply, and in a second phase, discharge the capacitor by coupling the voltage regulator in series with the capacitor between the power supply node a ground. The controller is also configured to in a third phase, charge the capacitor by coupling the capacitor between the common mode and the power supply, and in a fourth phase, share charge between the line and the capacitor by coupling the voltage regulator and the capacitor in series between the line and the ground.
    Type: Application
    Filed: December 12, 2017
    Publication date: April 12, 2018
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Chee Weng Cheong, Dianbo Guo, Kien Beng Tan, Yannick Guedon
  • Publication number: 20180101266
    Abstract: A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
    Type: Application
    Filed: December 13, 2017
    Publication date: April 12, 2018
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo
  • Publication number: 20180074619
    Abstract: An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.
    Type: Application
    Filed: November 15, 2017
    Publication date: March 15, 2018
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Praveesh Chandran, Baranidharan Karuppusamy, Giuseppe Noviello, Chee Weng Cheong, Leonard Liviu Dinu, Dianbo Guo, Kien Beng Tan, Chaochao Zhang
  • Patent number: 9874986
    Abstract: A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: January 23, 2018
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo