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).
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Patent number: 12104934Abstract: 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: GrantFiled: May 1, 2023Date of Patent: October 1, 2024Assignee: Apple Inc.Inventors: Xin Li, Damon R. Lemmon, David D. Dashevsky, Dianbo Guo, Peng Zhao, Ruonan Yang
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Publication number: 20240159884Abstract: 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: ApplicationFiled: October 23, 2023Publication date: May 16, 2024Inventors: Dianbo Guo, Mengshu Huang
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Publication number: 20230258479Abstract: 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: ApplicationFiled: May 1, 2023Publication date: August 17, 2023Inventors: Xin Li, Damon R. Lemmon, David D. Dashevsky, Dianbo Guo, Peng Zhao, Ruonan Yang
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Patent number: 11674825Abstract: 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: GrantFiled: September 21, 2021Date of Patent: June 13, 2023Assignee: Apple Inc.Inventors: Xin Li, Damon R. Lemmon, David D. Dashevsky, Dianbo Guo, Peng Zhao, Ruonan Yang
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Publication number: 20230086536Abstract: 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: ApplicationFiled: September 21, 2021Publication date: March 23, 2023Inventors: Xin Li, Damon R. Lemmon, David D. Dashevsky, Dianbo Guo, Peng Zhao, Ruonan Yang
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Patent number: 10534489Abstract: 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: GrantFiled: December 12, 2017Date of Patent: January 14, 2020Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Chee Weng Cheong, Dianbo Guo, Kien Beng Tan, Yannick Guedon
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Patent number: 10512157Abstract: 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: GrantFiled: September 22, 2017Date of Patent: December 17, 2019Assignee: Apple Inc.Inventors: Dianbo Guo, Dong Zheng
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Patent number: 10394349Abstract: 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: GrantFiled: April 13, 2018Date of Patent: August 27, 2019Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Chee Weng Cheong, Leonard Liviu Dinu, Dianbo Guo, Kien Beng Tan
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Publication number: 20190098748Abstract: 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: ApplicationFiled: September 22, 2017Publication date: March 28, 2019Inventors: Dianbo Guo, Dong Zheng
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Patent number: 10209844Abstract: 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: GrantFiled: June 1, 2018Date of Patent: February 19, 2019Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo
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Patent number: 10185454Abstract: 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: GrantFiled: November 15, 2017Date of Patent: January 22, 2019Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Praveesh Chandran, Baranidharan Karuppusamy, Giuseppe Noviello, Chee Weng Cheong, Leonard Liviu Dinu, Dianbo Guo, Kien Beng Tan, Chaochao Zhang
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Publication number: 20180275802Abstract: 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: ApplicationFiled: June 1, 2018Publication date: September 27, 2018Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo
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Publication number: 20180232071Abstract: 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: ApplicationFiled: April 13, 2018Publication date: August 16, 2018Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Chee Weng CHEONG, Leonard Liviu DINU, Dianbo GUO, Kien Beng TAN
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Patent number: 10013130Abstract: 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: GrantFiled: December 13, 2017Date of Patent: July 3, 2018Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo
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Patent number: 9990091Abstract: 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: GrantFiled: June 29, 2015Date of Patent: June 5, 2018Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTDInventors: Chee Weng Cheong, EngJye Ng, Dianbo Guo, Chaochao Zhang, Kusuma Adi Ningrat
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Patent number: 9971421Abstract: 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: GrantFiled: March 6, 2014Date of Patent: May 15, 2018Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Chee Weng Cheong, Leonard Liviu Dinu, Dianbo Guo, Kien Beng Tan
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Publication number: 20180101264Abstract: 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: ApplicationFiled: December 12, 2017Publication date: April 12, 2018Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Chee Weng Cheong, Dianbo Guo, Kien Beng Tan, Yannick Guedon
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Publication number: 20180101266Abstract: 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: ApplicationFiled: December 13, 2017Publication date: April 12, 2018Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo
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Publication number: 20180074619Abstract: 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: ApplicationFiled: November 15, 2017Publication date: March 15, 2018Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Praveesh Chandran, Baranidharan Karuppusamy, Giuseppe Noviello, Chee Weng Cheong, Leonard Liviu Dinu, Dianbo Guo, Kien Beng Tan, Chaochao Zhang
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Patent number: 9874986Abstract: 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: GrantFiled: November 19, 2015Date of Patent: January 23, 2018Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Yannick Guedon, Sze-Kwang Tan, Dianbo Guo